content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001384707</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000889331</issuerCik>
        <issuerName>LITTELFUSE INC /DE</issuerName>
        <secFileNumber>000-20388</secFileNumber>
        <issuerAddress>
          <com:street1>8755 WEST HIGGINS ROAD</com:street1>
          <com:city>CHICAGO</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60631</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>773-628-1000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Stafford Ryan K</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill</name>
          <address>
            <com:street1>8890 Lyra Dr 5th Flr</com:street1>
            <com:city>Columbus</com:city>
            <com:stateOrCountry>OH</com:stateOrCountry>
            <com:zipCode>43240</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>1932</noOfUnitsSold>
        <aggregateMarketValue>467779.00</aggregateMarketValue>
        <noOfUnitsOutstanding>24902916</noOfUnitsOutstanding>
        <approxSaleDate>02/08/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>04/23/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted stock vest</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Littelfuse Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>881</amountOfSecuritiesAcquired>
        <paymentDate>04/23/2021</paymentDate>
        <natureOfPayment>na</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>04/26/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted stock vest</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Littelfuse Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>557</amountOfSecuritiesAcquired>
        <paymentDate>04/26/2021</paymentDate>
        <natureOfPayment>na</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>common</securitiesClassTitle>
        <acquiredDate>04/27/2021</acquiredDate>
        <natureOfAcquisitionTransaction>restricted stock vest</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Littelfuse Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>494</amountOfSecuritiesAcquired>
        <paymentDate>04/27/2021</paymentDate>
        <natureOfPayment>na</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>02/08/2024</noticeDate>
        <signature>Ryan Stafford</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3751}]
text: 144
  0001384707
  XXXXXXXX
  LIVE
  0000889331
  LITTELFUSE INC /DE
  000-20388
  8755 WEST HIGGINS ROAD
  CHICAGO
  IL
  60631
  773-628-1000
  Stafford Ryan K
  Officer
  common
  Merrill
  8890 Lyra Dr 5th Flr
  Columbus
  OH
  43240
  1932
  467779.00
  24902916
  02/08/2024
  NYSE
  Common
  04/23/2021
  Restricted stock vest
  Littelfuse Inc
  N
  881
  04/23/2021
  na
  Common
  04/26/2021
  Restricted stock vest
  Littelfuse Inc
  N
  557
  04/26/2021
  na
  common
  04/27/2021
  restricted stock vest
  Littelfuse Inc
  N
  494
  04/27/2021
  na
  Y
  02/08/2024
  Ryan Stafford