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  <xs:element id="lfus_AnnualizedSales" abstract="false" name="AnnualizedSales" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_ConversionOfIXYSEquityAwardsIntoLittlefuseEquityAwardsMember" abstract="true" name="ConversionOfIXYSEquityAwardsIntoLittlefuseEquityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_IncomeTaxExaminationDecreaseDuetoLapseofStatuteofLimitations" abstract="false" name="IncomeTaxExaminationDecreaseDuetoLapseofStatuteofLimitations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_PassengerCarMember" abstract="true" name="PassengerCarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="lfus_EffectiveIncomeTaxRateReconciliationImpactofTaxProvisionsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationImpactofTaxProvisionsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_FuseUnitMember" abstract="true" name="FuseUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_DefinedBenefitPlanEstimatedReductionInPensionBenefitObligationFromGroupAnnuityContract" abstract="false" name="DefinedBenefitPlanEstimatedReductionInPensionBenefitObligationFromGroupAnnuityContract" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_DeferredTaxAssetsCapitalizedExpense" abstract="false" name="DeferredTaxAssetsCapitalizedExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_TermLoanCreditFacilityMember" abstract="true" name="TermLoanCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_HartlandControlsMember" abstract="true" name="HartlandControlsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_DebtInstrumentQuarterlyPaymentsPercentageofLoan" abstract="false" name="DebtInstrumentQuarterlyPaymentsPercentageofLoan" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="lfus_DefinedBenefitPlanForeignCurrencyAdjustmentsImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" abstract="false" name="DefinedBenefitPlanForeignCurrencyAdjustmentsImmediateRecognitionasComponentinNetPeriodicBenefitCostCredit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_USSeniorNotesSeriesADue2022Member" abstract="true" name="USSeniorNotesSeriesADue2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_LineofCreditFacilityAdditionalUncommittedBorrowingCapacity" abstract="false" name="LineofCreditFacilityAdditionalUncommittedBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_AdjustmentToAmortizationMember" abstract="true" name="AdjustmentToAmortizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="lfus_OtherCustomerReserves" abstract="false" name="OtherCustomerReserves" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lfus_DefinedContributionPlanEmployerDiscretionaryMatchingContributionPercentOfEmployeesGrossPay" abstract="false" name="DefinedContributionPlanEmployerDiscretionaryMatchingContributionPercentOfEmployeesGrossPay" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
</xs:schema>
