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        <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>
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        <issuerContactPhone>773-628-1000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>CHUNG T J</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
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      <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>
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        </brokerOrMarketmakerDetails>
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        <noOfUnitsOutstanding>24831628</noOfUnitsOutstanding>
        <approxSaleDate>05/08/2023</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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        <paymentDate>04/23/2021</paymentDate>
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        <paymentDate>04/26/2021</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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        <securitiesClassTitle>common</securitiesClassTitle>
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        <isGiftTransaction>N</isGiftTransaction>
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        <paymentDate>04/27/2021</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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        <securitiesClassTitle>common</securitiesClassTitle>
        <acquiredDate>04/22/2022</acquiredDate>
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        <paymentDate>04/22/2022</paymentDate>
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        <paymentDate>04/23/2022</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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        <acquiredDate>04/26/2022</acquiredDate>
        <natureOfAcquisitionTransaction>restricted stock vest</natureOfAcquisitionTransaction>
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        <paymentDate>04/26/2022</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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        <acquiredDate>04/22/2023</acquiredDate>
        <natureOfAcquisitionTransaction>restricted stock vest</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Littelfuse Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>132</amountOfSecuritiesAcquired>
        <paymentDate>04/22/2023</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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        <paymentDate>04/23/2023</paymentDate>
        <natureOfPayment>na</natureOfPayment>
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      <securitiesToBeSold>
        <securitiesClassTitle>common</securitiesClassTitle>
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        <natureOfAcquisitionTransaction>restricted stock vest</natureOfAcquisitionTransaction>
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        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>166</amountOfSecuritiesAcquired>
        <paymentDate>04/28/2023</paymentDate>
        <natureOfPayment>na</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/08/2023</noticeDate>
        <signature>TJ Chung</signature>
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text: 144
  0001217168
  XXXXXXXX
  LIVE
  0000889331
  LITTELFUSE INC /DE
  000-20388
  8755 WEST HIGGINS ROAD
  CHICAGO
  IL
  60631
  773-628-1000
  CHUNG T J
  Director
  Common
  Merrill
  8890 Lyra Dr 5th Flr
  Columbus
  OH
  43240
  1750
  453642.00
  24831628
  05/08/2023
  NASDAQ
  common
  04/23/2021
  restricted stock vest
  Littelfuse Inc
  N
  269
  04/23/2021
  NA
  common
  04/26/2021
  restricted stock vest
  Littelfuse Inc
  N
  178
  04/26/2021
  na
  common
  04/27/2021
  restricted stock vest
  Littelfuse inc
  N
  156
  04/27/2021
  na
  common
  04/22/2022
  restricted stock vest
  Littelfuse, Inc
  N
  132
  04/22/2022
  na
  common
  04/23/2022
  restricted stock vest
  Littelfuse, Inc
  N
  269
  04/23/2022
  na
  common
  04/26/2022
  restricted stock vest
  Littelfuse Inc
  N
  179
  04/26/2022
  na
  common
  04/22/2023
  restricted stock vest
  Littelfuse Inc
  N
  132
  04/22/2023
  na
  common
  04/23/2023
  restricted stock vest
  Littelfuse inc
  N
  269
  04/23/2023
  na
  common
  04/28/2023
  restricted stock vest
  Littelfuse Inc
  N
  166
  04/28/2023
  na
  Y
  05/08/2023
  TJ Chung