<SEC-DOCUMENT>0001567619-20-001876.txt : 20200203
<SEC-HEADER>0001567619-20-001876.hdr.sgml : 20200203
<ACCEPTANCE-DATETIME>20200203135746
ACCESSION NUMBER:		0001567619-20-001876
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20200201
FILED AS OF DATE:		20200203
DATE AS OF CHANGE:		20200203

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GREEN MARIA C
		CENTRAL INDEX KEY:			0001525175

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20388
		FILM NUMBER:		20568047

	MAIL ADDRESS:	
		STREET 1:		C/O INGERSOLL-RAND COMPANY
		STREET 2:		800-E BEATY STREET
		CITY:			DAVIDSON
		STATE:			NC
		ZIP:			28036

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LITTELFUSE INC /DE
		CENTRAL INDEX KEY:			0000889331
		STANDARD INDUSTRIAL CLASSIFICATION:	SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
		IRS NUMBER:				363795742
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1229

	BUSINESS ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
		BUSINESS PHONE:		773-628-1000

	MAIL ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-02-01</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000889331</issuerCik>
        <issuerName>LITTELFUSE INC /DE</issuerName>
        <issuerTradingSymbol>LFUS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001525175</rptOwnerCik>
            <rptOwnerName>GREEN MARIA C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LITTELFUSE</rptOwnerStreet1>
            <rptOwnerStreet2>8755 W HIGGINS RD., STE 500</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60631</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>Exhibit 24:
Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>Hans Weinburger, by power of attorney</signatureName>
        <signatureDate>2020-02-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa_green.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
<html>
  <head>
    <title></title>
    <!-- Licensed to: Broadridge Financial Solutions, Inc.
         Document created using EDGARfilings PROfile 6.4.0.0
         Copyright 1995 - 2020 Broadridge -->
  </head>
<body style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; text-align: left; color: #000000;" bgcolor="#ffffff">
  <div>
    <div style="text-align: center; line-height: 12.55pt; font-weight: bold;">POWER OF ATTORNEY</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; line-height: 12.55pt;">Know by all these presents that the undersigned hereby constitute and appoint each of Ryan K. Stafford, Meenal A.Sethna, Rebekah Mihm
      and Hans Weinburger, or any of them signing singly, with full power of substitution, the undersigned's true and lawful attorney-in-fact to:</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <table style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="z42c75b1a388f4779b4b320f60c4f391d" cellpadding="0" cellspacing="0">

        <tr>
          <td style="width: 6.15%; vertical-align: middle;">&#160;</td>
          <td style="width: 93.85%; vertical-align: middle;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 6.15%; vertical-align: top;">
            <div style="line-height: 12.55pt;">1)</div>
          </td>
          <td style="width: 93.85%; vertical-align: top;">
            <div style="text-align: justify; line-height: 12.55pt;">Prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S. Securities and Exchange
              Commission (the "SEC") a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section
              16(a) of the Securities Exchange Act of 1934 or any rule or regulation of the SEC;</div>
          </td>
        </tr>

    </table>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <table style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="z025cf19720fa4b898a1cbbf003733852" cellpadding="0" cellspacing="0">

        <tr>
          <td style="width: 6.15%; vertical-align: middle;">&#160;</td>
          <td style="width: 93.85%; vertical-align: middle;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 6.15%; vertical-align: top;">
            <div style="line-height: 12.55pt;">2)</div>
          </td>
          <td style="width: 93.85%; vertical-align: top;">
            <div style="text-align: justify; line-height: 12.55pt;">Execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or director of Littelfuse, Inc.
              (the &#8220;Company&#8221;), Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;</div>
          </td>
        </tr>

    </table>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <table style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="za73ac2d4a5c041fba1afa3ab20ab2b9a" cellpadding="0" cellspacing="0">

        <tr>
          <td style="width: 6.15%; vertical-align: middle;">&#160;</td>
          <td style="width: 93.85%; vertical-align: middle;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 6.15%; vertical-align: top;">
            <div style="line-height: 12.55pt;">3)</div>
          </td>
          <td style="width: 93.85%; vertical-align: top;">
            <div style="text-align: justify; line-height: 12.55pt;">Do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and
              execute any such Form 3, 4, or 5, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and</div>
          </td>
        </tr>

    </table>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <table style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;" id="ze6b6abd8496947b28b9f9e99122b29ac" cellpadding="0" cellspacing="0">

        <tr>
          <td style="width: 6.15%; vertical-align: middle;">&#160;</td>
          <td style="width: 93.85%; vertical-align: middle;">&#160;</td>
        </tr>
        <tr>
          <td style="width: 6.15%; vertical-align: top;">
            <div style="line-height: 12.55pt;">4)</div>
          </td>
          <td style="width: 93.85%; vertical-align: top;">
            <div style="text-align: justify; line-height: 12.55pt;">Take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact,
              may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such
              form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.</div>
          </td>
        </tr>

    </table>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; line-height: 12.55pt;">The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing
      whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or
      revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The
      undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the
      Securities Exchange Act of 1934.</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; line-height: 12.55pt;">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5
      with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: justify; line-height: 12.55pt;">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 7<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">th</sup> day of January, 2020.</div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="line-height: 12.55pt;"><br style="line-height: 12.55pt;">
    </div>
    <div style="text-align: right; line-height: 12.55pt;"><u>/s/ Maria Green</u></div>
    <div style="text-align: right; text-indent: 36pt; margin-left: 180pt; line-height: 12.55pt;">Maria Green</div>
    <div style="line-height: 14pt;"><br style="line-height: 14pt;">
    </div>
  </div>
</body>
</html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
