<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.littelfuse.com/20191228" xmlns:lfus="http://www.littelfuse.com/20191228" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/srt-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2019-01-31" schemaLocation="https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2019-01-31" schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2019-01-31" schemaLocation="https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lfus-20191228_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lfus-20191228_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lfus-20191228_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lfus-20191228_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="AccruedLiabilities" roleURI="http://www.littelfuse.com/role/AccruedLiabilities">
        <link:definition>2106100 - Disclosure - Accrued Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesDetails" roleURI="http://www.littelfuse.com/role/AccruedLiabilitiesDetails">
        <link:definition>2406402 - Disclosure - Accrued Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesTables" roleURI="http://www.littelfuse.com/role/AccruedLiabilitiesTables">
        <link:definition>2306301 - Disclosure - Accrued Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Acquisitions" roleURI="http://www.littelfuse.com/role/Acquisitions">
        <link:definition>2102100 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsBusinessAcquisitionProFormaInformationDetails" roleURI="http://www.littelfuse.com/role/AcquisitionsBusinessAcquisitionProFormaInformationDetails">
        <link:definition>2402404 - Disclosure - Acquisitions - Business Acquisition Pro Forma Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsNarrativeDetails" roleURI="http://www.littelfuse.com/role/AcquisitionsNarrativeDetails">
        <link:definition>2402402 - Disclosure - Acquisitions - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsPreliminaryPriceAllocationDetails" roleURI="http://www.littelfuse.com/role/AcquisitionsPreliminaryPriceAllocationDetails">
        <link:definition>2402403 - Disclosure - Acquisitions - Preliminary Price Allocation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsProFormaInformationAdjustmentsDetails" roleURI="http://www.littelfuse.com/role/AcquisitionsProFormaInformationAdjustmentsDetails">
        <link:definition>2402405 - Disclosure - Acquisitions - Pro Forma Information Adjustments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTables" roleURI="http://www.littelfuse.com/role/AcquisitionsTables">
        <link:definition>2302301 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlans" roleURI="http://www.littelfuse.com/role/BenefitPlans">
        <link:definition>2111100 - Disclosure - Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAllocationOfPlanAssetsDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansAllocationOfPlanAssetsDetails">
        <link:definition>2411408 - Disclosure - Benefit Plans - Allocation of Plan Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAmountsRecognizedInAccumulatedOtherComprehensiveIncomeLossPreTaxDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansAmountsRecognizedInAccumulatedOtherComprehensiveIncomeLossPreTaxDetails">
        <link:definition>2411403 - Disclosure - Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansBenefitPlanExpensesDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansBenefitPlanExpensesDetails">
        <link:definition>2411404 - Disclosure - Benefit Plans - Benefit Plan Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansBenefitPlanRelatedInformationDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansBenefitPlanRelatedInformationDetails">
        <link:definition>2411402 - Disclosure - Benefit Plans - Benefit Plan Related Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansCompanysPensionPlanAssetsMeasuredAtFairValueDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansCompanysPensionPlanAssetsMeasuredAtFairValueDetails">
        <link:definition>2411409 - Disclosure - Benefit Plans - The Company's Pension Plan Assets Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansDefinedContributionAndOtherPlansDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansDefinedContributionAndOtherPlansDetails">
        <link:definition>2411410 - Disclosure - Benefit Plans - Defined Contribution and Other Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansExpectedBenefitPaymentsToBePaidToParticipantsDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansExpectedBenefitPaymentsToBePaidToParticipantsDetails">
        <link:definition>2411407 - Disclosure - Benefit Plans - Expected Benefit Payments to Be Paid to Participants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansFundedStatusOfPlansDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansFundedStatusOfPlansDetails">
        <link:definition>2411406 - Disclosure - Benefit Plans - Funded Status of Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansTables" roleURI="http://www.littelfuse.com/role/BenefitPlansTables">
        <link:definition>2311301 - Disclosure - Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansWeightedAverageAssumptionsDetails" roleURI="http://www.littelfuse.com/role/BenefitPlansWeightedAverageAssumptionsDetails">
        <link:definition>2411405 - Disclosure - Benefit Plans - Weighted Average Assumptions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.littelfuse.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001000 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParentheticals" roleURI="http://www.littelfuse.com/role/ConsolidatedBalanceSheetsParentheticals">
        <link:definition>1001501 - Statement - Consolidated Balance Sheets (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfCashFlows" roleURI="http://www.littelfuse.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>1004000 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.littelfuse.com/role/ConsolidatedStatementsOfComprehensiveIncome">
        <link:definition>1003000 - Statement - Consolidated Statements of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfEquity" roleURI="http://www.littelfuse.com/role/ConsolidatedStatementsOfEquity">
        <link:definition>1005000 - Statement - Consolidated Statements of Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfEquityParentheticals" roleURI="http://www.littelfuse.com/role/ConsolidatedStatementsOfEquityParentheticals">
        <link:definition>1005501 - Statement - Consolidated Statements of Equity (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfNetIncome" roleURI="http://www.littelfuse.com/role/ConsolidatedStatementsOfNetIncome">
        <link:definition>1002000 - Statement - Consolidated Statements of Net Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CoverPage" roleURI="http://www.littelfuse.com/role/CoverPage">
        <link:definition>0001000 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.littelfuse.com/role/Debt">
        <link:definition>2109100 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtCarryingAmountsOfLongTermDebtDetails" roleURI="http://www.littelfuse.com/role/DebtCarryingAmountsOfLongTermDebtDetails">
        <link:definition>2409402 - Disclosure - Debt - Carrying Amounts of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtNarrativeDetails" roleURI="http://www.littelfuse.com/role/DebtNarrativeDetails">
        <link:definition>2409403 - Disclosure - Debt - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtScheduledMaturitiesOfCompanysLongTermDebtDetails" roleURI="http://www.littelfuse.com/role/DebtScheduledMaturitiesOfCompanysLongTermDebtDetails">
        <link:definition>2409404 - Disclosure - Debt - Scheduled Maturities of the Company's Long Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.littelfuse.com/role/DebtTables">
        <link:definition>2309301 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.littelfuse.com/role/EarningsPerShare">
        <link:definition>2115100 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareComputationOfBasicAndDilutedEarningsPerShareDetails" roleURI="http://www.littelfuse.com/role/EarningsPerShareComputationOfBasicAndDilutedEarningsPerShareDetails">
        <link:definition>2415403 - Disclosure - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareNarrativeDetails" roleURI="http://www.littelfuse.com/role/EarningsPerShareNarrativeDetails">
        <link:definition>2415402 - Disclosure - Earnings Per Share - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.littelfuse.com/role/EarningsPerShareTables">
        <link:definition>2315301 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueOfAssetsAndLiabilities" roleURI="http://www.littelfuse.com/role/FairValueOfAssetsAndLiabilities">
        <link:definition>2110100 - Disclosure - Fair Value of Assets and Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueOfAssetsAndLiabilitiesAssetsMeasuredAtFairValueDetails" roleURI="http://www.littelfuse.com/role/FairValueOfAssetsAndLiabilitiesAssetsMeasuredAtFairValueDetails">
        <link:definition>2410402 - Disclosure - Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueOfAssetsAndLiabilitiesCarryingValueAndEstimatedFairValueOfSeniorNotesDetails" roleURI="http://www.littelfuse.com/role/FairValueOfAssetsAndLiabilitiesCarryingValueAndEstimatedFairValueOfSeniorNotesDetails">
        <link:definition>2410403 - Disclosure - Fair Value of Assets and Liabilities - Carrying Value and Estimated Fair Value of Senior Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueOfAssetsAndLiabilitiesTables" roleURI="http://www.littelfuse.com/role/FairValueOfAssetsAndLiabilitiesTables">
        <link:definition>2310301 - Disclosure - Fair Value of Assets and Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssets" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssets">
        <link:definition>2105100 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssetsAmountsForGoodwillAndChangesInCarryingValueByOperatingSegmentDetails" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssetsAmountsForGoodwillAndChangesInCarryingValueByOperatingSegmentDetails">
        <link:definition>2405402 - Disclosure - Goodwill and Other Intangible Assets - Amounts for Goodwill and Changes in Carrying Value by Operating Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssetsDetailsOfOtherIntangibleAssetsAndRelatedFutureAmortizationExpenseDetails" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssetsDetailsOfOtherIntangibleAssetsAndRelatedFutureAmortizationExpenseDetails">
        <link:definition>2405404 - Disclosure - Goodwill and Other Intangible Assets - Details of Other Intangible Assets and Related Future Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssetsEstimatedAmortizationExpenseRelatedToIntangibleAssetsWithDefiniteLivesDetails" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssetsEstimatedAmortizationExpenseRelatedToIntangibleAssetsWithDefiniteLivesDetails">
        <link:definition>2405405 - Disclosure - Goodwill and Other Intangible Assets - Estimated Amortization Expense Related to Intangible Assets with Definite Lives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssetsNarrativeDetails" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssetsNarrativeDetails">
        <link:definition>2405403 - Disclosure - Goodwill and Other Intangible Assets - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIntangibleAssetsTables" roleURI="http://www.littelfuse.com/role/GoodwillAndOtherIntangibleAssetsTables">
        <link:definition>2305301 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.littelfuse.com/role/IncomeTaxes">
        <link:definition>2114100 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" roleURI="http://www.littelfuse.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails">
        <link:definition>2414405 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesEffectiveIncomeTaxReconciliationAndProvisionForIncomeTaxesDetails" roleURI="http://www.littelfuse.com/role/IncomeTaxesEffectiveIncomeTaxReconciliationAndProvisionForIncomeTaxesDetails">
        <link:definition>2414404 - Disclosure - Income Taxes - Effective Income Tax Reconciliation and Provision for Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesFederalStateAndForeignIncomeTaxBenefitExpenseDetails" roleURI="http://www.littelfuse.com/role/IncomeTaxesFederalStateAndForeignIncomeTaxBenefitExpenseDetails">
        <link:definition>2414403 - Disclosure - Income Taxes - Federal, State, and Foreign Income Tax (Benefit) Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.littelfuse.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>2414402 - Disclosure - Income Taxes - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesReconciliationOfBeginningAndEndingAmountOfUnrecognizedTaxBenefitsDetails" roleURI="http://www.littelfuse.com/role/IncomeTaxesReconciliationOfBeginningAndEndingAmountOfUnrecognizedTaxBenefitsDetails">
        <link:definition>2414406 - Disclosure - Income Taxes - Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.littelfuse.com/role/IncomeTaxesTables">
        <link:definition>2314301 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Inventories" roleURI="http://www.littelfuse.com/role/Inventories">
        <link:definition>2103100 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesComponentsOfInventoriesDetails" roleURI="http://www.littelfuse.com/role/InventoriesComponentsOfInventoriesDetails">
        <link:definition>2403402 - Disclosure - Inventories - Components of Inventories (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesTables" roleURI="http://www.littelfuse.com/role/InventoriesTables">
        <link:definition>2303301 - Disclosure - Inventories (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitments" roleURI="http://www.littelfuse.com/role/LeaseCommitments">
        <link:definition>2107100 - Disclosure - Lease Commitments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsBalanceSheetOperatingLeaseTermAndDiscountRateDetails" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsBalanceSheetOperatingLeaseTermAndDiscountRateDetails">
        <link:definition>2407402 - Disclosure - Lease Commitments - Balance Sheet, Operating Lease Term and Discount Rate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsLeaseCostDetails" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsLeaseCostDetails">
        <link:definition>2407403 - Disclosure - Lease Commitments - Lease Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsMaturitiesOfLeaseLiabilitiesDetails" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsMaturitiesOfLeaseLiabilitiesDetails">
        <link:definition>2407405 - Disclosure - Lease Commitments - Maturities of Lease Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsNarrativeDetails" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsNarrativeDetails">
        <link:definition>2407404 - Disclosure - Lease Commitments - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsScheduleOfFutureMinimumPaymentsForNonCancellableOperatingLeasesUnderAsc840Details" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsScheduleOfFutureMinimumPaymentsForNonCancellableOperatingLeasesUnderAsc840Details">
        <link:definition>2407407 - Disclosure - Lease Commitments - Schedule of Future Minimum Payments for NOn-Cancellable Operating Leases Under ASC 840 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsSupplementalCashFlowInformationDetailsDetails" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsSupplementalCashFlowInformationDetailsDetails">
        <link:definition>2407406 - Disclosure - Lease Commitments - Supplemental Cash Flow Information (Details) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeaseCommitmentsTables" roleURI="http://www.littelfuse.com/role/LeaseCommitmentsTables">
        <link:definition>2307301 - Disclosure - Lease Commitments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLoss" roleURI="http://www.littelfuse.com/role/OtherComprehensiveIncomeLoss">
        <link:definition>2113100 - Disclosure - Other Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails" roleURI="http://www.littelfuse.com/role/OtherComprehensiveIncomeLossReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails">
        <link:definition>2413404 - Disclosure - Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossScheduleOfAccumulatedOtherComprehensiveIncomeLossDetails" roleURI="http://www.littelfuse.com/role/OtherComprehensiveIncomeLossScheduleOfAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>2413403 - Disclosure - Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossScheduleOfComponentsOfComprehensiveIncomeLossDetails" roleURI="http://www.littelfuse.com/role/OtherComprehensiveIncomeLossScheduleOfComponentsOfComprehensiveIncomeLossDetails">
        <link:definition>2413402 - Disclosure - Other Comprehensive Income (Loss) - Schedule of Components of Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherComprehensiveIncomeLossTables" roleURI="http://www.littelfuse.com/role/OtherComprehensiveIncomeLossTables">
        <link:definition>2313301 - Disclosure - Other Comprehensive Income (Loss) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipment" roleURI="http://www.littelfuse.com/role/PropertyPlantAndEquipment">
        <link:definition>2104100 - Disclosure - Property, Plant, and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipmentDetails" roleURI="http://www.littelfuse.com/role/PropertyPlantAndEquipmentDetails">
        <link:definition>2404402 - Disclosure - Property, Plant, and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipmentTables" roleURI="http://www.littelfuse.com/role/PropertyPlantAndEquipmentTables">
        <link:definition>2304301 - Disclosure - Property, Plant, and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactions" roleURI="http://www.littelfuse.com/role/RelatedPartyTransactions">
        <link:definition>2118100 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsDetails" roleURI="http://www.littelfuse.com/role/RelatedPartyTransactionsDetails">
        <link:definition>2418401 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringImpairmentAndOtherCharges" roleURI="http://www.littelfuse.com/role/RestructuringImpairmentAndOtherCharges">
        <link:definition>2108100 - Disclosure - Restructuring, Impairment and Other Charges</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringImpairmentAndOtherChargesDetails" roleURI="http://www.littelfuse.com/role/RestructuringImpairmentAndOtherChargesDetails">
        <link:definition>2408402 - Disclosure - Restructuring, Impairment and Other Charges (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringImpairmentAndOtherChargesTables" roleURI="http://www.littelfuse.com/role/RestructuringImpairmentAndOtherChargesTables">
        <link:definition>2308301 - Disclosure - Restructuring, Impairment and Other Charges (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiValuationAndQualifyingAccountsAndReserves" roleURI="http://www.littelfuse.com/role/ScheduleIiValuationAndQualifyingAccountsAndReserves">
        <link:definition>2119100 - Schedule - Schedule II - Valuation and Qualifying Accounts and Reserves</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiValuationAndQualifyingAccountsAndReservesDetails" roleURI="http://www.littelfuse.com/role/ScheduleIiValuationAndQualifyingAccountsAndReservesDetails">
        <link:definition>2419402 - Schedule - Schedule II - Valuation and Qualifying Accounts and Reserves (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiValuationAndQualifyingAccountsAndReservesTables" roleURI="http://www.littelfuse.com/role/ScheduleIiValuationAndQualifyingAccountsAndReservesTables">
        <link:definition>2319301 - Schedule - Schedule II - Valuation and Qualifying Accounts and Reserves (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.littelfuse.com/role/SegmentInformation">
        <link:definition>2116100 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationDetails" roleURI="http://www.littelfuse.com/role/SegmentInformationDetails">
        <link:definition>2416402 - Disclosure - Segment Information - (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationNarrativeDetails" roleURI="http://www.littelfuse.com/role/SegmentInformationNarrativeDetails">
        <link:definition>2416403 - Disclosure - Segment Information - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationRevenuesAndLongLivedAssetsByGeographicalAreaDetails" roleURI="http://www.littelfuse.com/role/SegmentInformationRevenuesAndLongLivedAssetsByGeographicalAreaDetails">
        <link:definition>2416404 - Disclosure - Segment Information - Revenues and Long-lived Assets by Geographical Area (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.littelfuse.com/role/SegmentInformationTables">
        <link:definition>2316301 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyFinancialDataNarrativeDetails" roleURI="http://www.littelfuse.com/role/SelectedQuarterlyFinancialDataNarrativeDetails">
        <link:definition>2417403 - Disclosure - Selected Quarterly Financial Data - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyFinancialDataUnaudited" roleURI="http://www.littelfuse.com/role/SelectedQuarterlyFinancialDataUnaudited">
        <link:definition>2117100 - Disclosure - Selected Quarterly Financial Data (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyFinancialDataUnauditedQuarterlyFinancialInformationDetails" roleURI="http://www.littelfuse.com/role/SelectedQuarterlyFinancialDataUnauditedQuarterlyFinancialInformationDetails">
        <link:definition>2417402 - Disclosure - Selected Quarterly Financial Data (Unaudited) - Quarterly Financial Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyFinancialDataUnauditedTables" roleURI="http://www.littelfuse.com/role/SelectedQuarterlyFinancialDataUnauditedTables">
        <link:definition>2317301 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensation" roleURI="http://www.littelfuse.com/role/StockBasedCompensation">
        <link:definition>2112100 - Disclosure - Stock-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationNarrativeDetails" roleURI="http://www.littelfuse.com/role/StockBasedCompensationNarrativeDetails">
        <link:definition>2412402 - Disclosure - Stock-Based Compensation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationReconciliationOfNonvestedRestrictedShareAndShareUnitAwardsDetails" roleURI="http://www.littelfuse.com/role/StockBasedCompensationReconciliationOfNonvestedRestrictedShareAndShareUnitAwardsDetails">
        <link:definition>2412404 - Disclosure - Stock-Based Compensation - Reconciliation of Nonvested Restricted Share and Share Unit Awards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationReconciliationOfOutstandingStockOptionsDetails" roleURI="http://www.littelfuse.com/role/StockBasedCompensationReconciliationOfOutstandingStockOptionsDetails">
        <link:definition>2412403 - Disclosure - Stock-Based Compensation - Reconciliation of Outstanding Stock Options (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationTables" roleURI="http://www.littelfuse.com/role/StockBasedCompensationTables">
        <link:definition>2312301 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationWeightedAverageFairValueOfOptionsGrantedAndBlackScholesOptionValuationModelAssumptionsDetails" roleURI="http://www.littelfuse.com/role/StockBasedCompensationWeightedAverageFairValueOfOptionsGrantedAndBlackScholesOptionValuationModelAssumptionsDetails">
        <link:definition>2412405 - Disclosure - Stock-Based Compensation - Weighted Average Fair Value of Options Granted and Black-Scholes Option Valuation Model Assumptions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesAndOtherInformation" roleURI="http://www.littelfuse.com/role/SummaryOfSignificantAccountingPoliciesAndOtherInformation">
        <link:definition>2101100 - Disclosure - Summary of Significant Accounting Policies and Other Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesAndOtherInformationNarrativeDetails" roleURI="http://www.littelfuse.com/role/SummaryOfSignificantAccountingPoliciesAndOtherInformationNarrativeDetails">
        <link:definition>2401404 - Disclosure - Summary of Significant Accounting Policies and Other Information - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesAndOtherInformationPolicies" roleURI="http://www.littelfuse.com/role/SummaryOfSignificantAccountingPoliciesAndOtherInformationPolicies">
        <link:definition>2201201 - Disclosure - Summary of Significant Accounting Policies and Other Information (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesAndOtherInformationRevenueDisaggregationDetails" roleURI="http://www.littelfuse.com/role/SummaryOfSignificantAccountingPoliciesAndOtherInformationRevenueDisaggregationDetails">
        <link:definition>2401403 - Disclosure - Summary of Significant Accounting Policies and Other Information - Revenue Disaggregation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesAndOtherInformationTables" roleURI="http://www.littelfuse.com/role/SummaryOfSignificantAccountingPoliciesAndOtherInformationTables">
        <link:definition>2301302 - Disclosure - Summary of Significant Accounting Policies and Other Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="lfus_ATECMember" name="ATECMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_AccruedShareRepurchasesCurrent" name="AccruedShareRepurchasesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lfus_AdjustmentToAmortizationMember" name="AdjustmentToAmortizationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AdjustmentToDepreciationMember" name="AdjustmentToDepreciationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AdjustmentToIncomeTaxMember" name="AdjustmentToIncomeTaxMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AdjustmentToInterestExpenseMember" name="AdjustmentToInterestExpenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AdjustmentToStockCompensationMember" name="AdjustmentToStockCompensationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AmortizationOfInventoryStepUpMember" name="AmortizationOfInventoryStepUpMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ArrowElectronicsIncMember" name="ArrowElectronicsIncMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_AssetsAndLiabilitiesLesseeTableTextBlock" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AssetsLesseeAbstract" name="AssetsLesseeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AutomotiveMember" name="AutomotiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_AutomotiveSensorsMember" name="AutomotiveSensorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_BankOfAmericaMember" name="BankOfAmericaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessAcquisitionProFormaIncomeLossfromContinuingOperationsbeforeTax" name="BusinessAcquisitionProFormaIncomeLossfromContinuingOperationsbeforeTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessAcquisitionShareExchangeRatio" name="BusinessAcquisitionShareExchangeRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="lfus_BusinessCombinationAcquisitionRelatedCostsandIntegrationCostsLegalAccountingandOtherExpenses" name="BusinessCombinationAcquisitionRelatedCostsandIntegrationCostsLegalAccountingandOtherExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationBacklogAmortizationCosts" name="BusinessCombinationBacklogAmortizationCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationChangeinControlExpense" name="BusinessCombinationChangeinControlExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationConsiderationTransferredCashSettledStockOptions" name="BusinessCombinationConsiderationTransferredCashSettledStockOptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationConsiderationTransferredCommitmentToPurchaseNoncontrollingInterest" name="BusinessCombinationConsiderationTransferredCommitmentToPurchaseNoncontrollingInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationConsiderationTransferredConvertedStockOptions" name="BusinessCombinationConsiderationTransferredConvertedStockOptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationConsiderationTransferredExcludingValueOfStockOptionsConverted" name="BusinessCombinationConsiderationTransferredExcludingValueOfStockOptionsConverted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedGoodwill" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedGoodwill" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lfus_BusinessCombinationValueOfStockOptionsConvertedToCompanysStockOptions" name="BusinessCombinationValueOfStockOptionsConvertedToCompanysStockOptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_CoalMiningLiabilityPolicyTextBlock" name="CoalMiningLiabilityPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_CommercialVehicleProductsMember" name="CommercialVehicleProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ConversionOfIXYSEquityAwardsIntoLittlefuseEquityAwardsMember" name="ConversionOfIXYSEquityAwardsIntoLittlefuseEquityAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_CreditAgreementMember" name="CreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_CustomerListsTrademarksAndTradeNamesMember" name="CustomerListsTrademarksAndTradeNamesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_DebtAgreementMaximumBorrowingCapacity" name="DebtAgreementMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lfus_DebtInstrumentQuarterlyPaymentsPercentageofLoan" name="DebtInstrumentQuarterlyPaymentsPercentageofLoan" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="lfus_DeferredTaxAssetsCapitalizedExpense" name="DeferredTaxAssetsCapitalizedExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="lfus_DeferredTaxLiabilitiesRecognizedonUndistributedForeignEarnings" name="DeferredTaxLiabilitiesRecognizedonUndistributedForeignEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lfus_DefinedBenefitPlanAmortizationofNetActuarialCost" name="DefinedBenefitPlanAmortizationofNetActuarialCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_DefinedBenefitPlanBenefitsPaidDirectlyByCompany" name="DefinedBenefitPlanBenefitsPaidDirectlyByCompany" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_DefinedBenefitPlanForeignCurrencyAdjustmentsImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" name="DefinedBenefitPlanForeignCurrencyAdjustmentsImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_DefinedBenefitPlanImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" name="DefinedBenefitPlanImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_DefinedBenefitPlanInsuranceContractsandOtherMember" name="DefinedBenefitPlanInsuranceContractsandOtherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_DefinedContributionPlanEmployerDiscretionaryMatchingContributionPercentOfEmployeesGrossPay" name="DefinedContributionPlanEmployerDiscretionaryMatchingContributionPercentOfEmployeesGrossPay" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_DefinedContributionPlanPlanAssets" name="DefinedContributionPlanPlanAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lfus_DenominatorAbstract" name="DenominatorAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_EBTechMember" name="EBTechMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_EffectiveIncomeTaxRateReconciliationChangeinUnrecognizedTaxBenefitsandRelatedAccruedInterest" name="EffectiveIncomeTaxRateReconciliationChangeinUnrecognizedTaxBenefitsandRelatedAccruedInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_EffectiveIncomeTaxRateReconciliationImpactofTaxProvisionsAmount" name="EffectiveIncomeTaxRateReconciliationImpactofTaxProvisionsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_EffectiveIncomeTaxRateReconciliationProvisionalTaxActImpactOtherThanTollChargeAmount" name="EffectiveIncomeTaxRateReconciliationProvisionalTaxActImpactOtherThanTollChargeAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_EffectiveIncomeTaxRateReconciliationTollChargeAmount" name="EffectiveIncomeTaxRateReconciliationTollChargeAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_EffectiveIncomeTaxRateReconciliationUndistributedForeignEarnings" name="EffectiveIncomeTaxRateReconciliationUndistributedForeignEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ElectronicsMember" name="ElectronicsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ElectronicsNonSiliconUnitMember" name="ElectronicsNonSiliconUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ElectronicsPassiveProductsAndSensorsMember" name="ElectronicsPassiveProductsAndSensorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ElectronicsSemiconductorMember" name="ElectronicsSemiconductorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_ElectronicsSiliconUnitMember" name="ElectronicsSiliconUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_EuroSeniorNotesSeriesAAndBMember" name="EuroSeniorNotesSeriesAAndBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_EuroSeniorNotesSeriesAMember" name="EuroSeniorNotesSeriesAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_EuroSeniorNotesSeriesBMember" name="EuroSeniorNotesSeriesBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_ExcessOfFairValueOverCarryingValueOfInvestedCapital" name="ExcessOfFairValueOverCarryingValueOfInvestedCapital" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lfus_FuseUnitMember" name="FuseUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_IXYSCorporationMember" name="IXYSCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxExaminationDecreaseDuetoLapseofStatuteofLimitations" name="IncomeTaxExaminationDecreaseDuetoLapseofStatuteofLimitations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityOtherThanTollCharge" name="IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityOtherThanTollCharge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityTollCharge" name="IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityTollCharge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityTollChargeNoncurrent" name="IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityTollChargeNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentofDeferredTaxAssetLiabilityTollChargeCurrent" name="IncomeTaxExpenseBenefitContinuingOperationsAdjustmentofDeferredTaxAssetLiabilityTollChargeCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxHolidayExpenseBenefitAmountPerDilutedShare" name="IncomeTaxHolidayExpenseBenefitAmountPerDilutedShare" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncomeTaxReconciliationNondeductibleExpenseProfessionalFees" name="IncomeTaxReconciliationNondeductibleExpenseProfessionalFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_IncreaseDecreaseInEntrustedLoanPayable" name="IncreaseDecreaseInEntrustedLoanPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_IndustrialMember" name="IndustrialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_IndustrialProductsMember" name="IndustrialProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_InventoryAmortizationPeriod" name="InventoryAmortizationPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_InventoryChargeRelatedToStepUpInCostBasis" name="InventoryChargeRelatedToStepUpInCostBasis" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_LeasePaymentsAbstract" name="LeasePaymentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_LiabilitiesLesseeAbstract" name="LiabilitiesLesseeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_LineofCreditFacilityAdditionalUncommittedBorrowingCapacity" name="LineofCreditFacilityAdditionalUncommittedBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lfus_LineofCreditFacilityAdditionalUncommittedBorrowingCapacityMinimumIncrements" name="LineofCreditFacilityAdditionalUncommittedBorrowingCapacityMinimumIncrements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="lfus_LongtermInvestmentOwnershipPercentage" name="LongtermInvestmentOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lfus_MonolithMember" name="MonolithMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_NumberofAdvances" name="NumberofAdvances" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="lfus_NumberofCustomers" name="NumberofCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_NumberofSeries" name="NumberofSeries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="lfus_NumeratorAbstract" name="NumeratorAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_OperatingLeaseTermandDiscountRateTableTextBlock" name="OperatingLeaseTermandDiscountRateTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_OtherCountriesMember" name="OtherCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_OtherExpenseIncomeMember" name="OtherExpenseIncomeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_OtherIncomeExpensePolicyTextBlock" name="OtherIncomeExpensePolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_OtherItemsMember" name="OtherItemsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_OtherLongtermLiabilitiesMember" name="OtherLongtermLiabilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PassengerCarMember" name="PassengerCarMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PassengerCarProductsMember" name="PassengerCarProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PatentedAndUnpatentedTechnologiesMember" name="PatentedAndUnpatentedTechnologiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PatentsLicensesAndSoftwareMember" name="PatentsLicensesAndSoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_PaymentsofEntrustedLoan" name="PaymentsofEntrustedLoan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="lfus_PensionPlanAssetsMeasuredAtFairValueTableTextBlock" name="PensionPlanAssetsMeasuredAtFairValueTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PolytronicsMember" name="PolytronicsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_PowersemMember" name="PowersemMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_ProceedsfromRepurchaseofStockBasedAwardActivities" name="ProceedsfromRepurchaseofStockBasedAwardActivities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lfus_PurchaseAccountingInventoryAdjustments" name="PurchaseAccountingInventoryAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_RelayUnitMember" name="RelayUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_RestrictedStockAndRestrictedShareUnitsMember" name="RestrictedStockAndRestrictedShareUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_RevenuefromContractwithCustomersShippingandHandlingCostsPolicyTextBlock" name="RevenuefromContractwithCustomersShippingandHandlingCostsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_SECSchedule1209ReserveSalesDiscountsandAllowancesMember" name="SECSchedule1209ReserveSalesDiscountsandAllowancesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_SavingsPlan401KMember" name="SavingsPlan401KMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_SensorsMember" name="SensorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsConvertedinPeriod" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsConvertedinPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_ShippingandHandlingFeesandCosts" name="ShippingandHandlingFeesandCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_StockholdersOfMonolithMember" name="StockholdersOfMonolithMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_SummaryofSignificantAccountingPoliciesandOtherInformationLineItems" name="SummaryofSignificantAccountingPoliciesandOtherInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_SummaryofSignificantAccountingPoliciesandOtherInformationTable" name="SummaryofSignificantAccountingPoliciesandOtherInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_TermLoanCreditFacilityMember" name="TermLoanCreditFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_TollChargeMember" name="TollChargeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesAAndBDue2025And2030Member" name="USSeniorNotesAAndBDue2025And2030Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesADue2025Member" name="USSeniorNotesADue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesBDue2030Member" name="USSeniorNotesBDue2030Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesAAndBMember" name="USSeniorNotesSeriesAAndBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesADue2022Member" name="USSeniorNotesSeriesADue2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesADue2025Member" name="USSeniorNotesSeriesADue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesAMember" name="USSeniorNotesSeriesAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesBDue2027Member" name="USSeniorNotesSeriesBDue2027Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesBDue2030Member" name="USSeniorNotesSeriesBDue2030Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSeniorNotesSeriesBMember" name="USSeniorNotesSeriesBMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lfus_USSensorMember" name="USSensorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lfus_UnrecognizedTaxBenefitsDecreaseResultingFromOtherPositions" name="UnrecognizedTaxBenefitsDecreaseResultingFromOtherPositions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
