<?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>0001826730</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000751978</issuerCik>
      <issuerName>VICOR CORP</issuerName>
      <secFileNumber>000-18277</secFileNumber>
      <issuerAddress>
        <com:street1>25 FRONTAGE ROAD</com:street1>
        <com:city>ANDOVER</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>01810</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(978) 470-2900</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Doyle Alvaro</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>25</noOfUnitsSold>
      <aggregateMarketValue>2211.88</aggregateMarketValue>
      <noOfUnitsOutstanding>32471065</noOfUnitsOutstanding>
      <approxSaleDate>08/01/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/12/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Purchase</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Market</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>10</amountOfSecuritiesAcquired>
      <paymentDate>05/12/2023</paymentDate>
      <natureOfPayment>Cash/ check</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>10/28/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Purchase`</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Market</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>15</amountOfSecuritiesAcquired>
      <paymentDate>10/28/2020</paymentDate>
      <natureOfPayment>Cash/ check</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Alvaro J Doyle</name>
        <address>
          <com:street1>25 Frontage Road</com:street1>
          <com:city>Andover</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01810</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>07/27/2023</saleDate>
      <amountOfSecuritiesSold>1661</amountOfSecuritiesSold>
      <grossProceeds>158375.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>08/01/2023</noticeDate>
      <signature>/s/ Cristina Garcia, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doyle Alvaro</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3891}]
144
0001826730
XXXXXXXX
LIVE
0000751978
VICOR CORP
000-18277
25 FRONTAGE ROAD
ANDOVER
MA
01810
(978) 470-2900
Doyle Alvaro
Officer
Common
Fidelity Brokerage Services LLC
245 Summer Street
Boston
MA
02110
25
2211.88
32471065
08/01/2023
NASDAQ
Common
05/12/2023
Purchase
Market
N
10
05/12/2023
Cash/ check
Common
10/28/2020
Purchase`
Market
N
15
10/28/2020
Cash/ check
N
Alvaro J Doyle
25 Frontage Road
Andover
MA
01810
Common
07/27/2023
1661
158375.00
08/01/2023
/s/ Cristina Garcia, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doyle Alvaro