Diode identification for data rescue

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  • MrBojangles
    Member
    • Jul 2024
    • 49
    • Sweden

    #1

    Diode identification for data rescue

    Heyo

    I'm trying to perform data rescue on this drive and don't want to make a mistake. I've found a burned diode and a shorted capacitor right next to it. I've found a component on eBay that seems to match up. Can someone confirm please? Also I don't mind replacing it with a compatible component if it's easy to get hold of.

    https://www.ebay.de/itm/235070605065

    Have a nice day

    Click image for larger version

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    Last edited by MrBojangles; 05-29-2025, 03:19 AM. Reason: Forgot to add image
  • m1ch43lzm
    Badcaps Veteran
    • Mar 2019
    • 961
    • Peru

    #2
    It's a TVS diode rated 13V, across the +12V power supply rail
    Can be temporarily removed for data recovery as long as your PSU is working properly on the 12V rail, for long term use I would replace it with a similar diode from another dead HDD
    Common failure when a bad PSU delivers over voltage on that rail

    Also measure across both 0 ohm resistors
    Last edited by m1ch43lzm; 05-29-2025, 09:24 AM.

    Comment

    • truclacicr
      Badcaps Veteran
      • Apr 2019
      • 352
      • australia

      #3
      You can use an SMBJ12A or SMCJ12A, depending on the dimensions. The capacitor should be OK -- the shorted diode is making it look bad.

      Comment

      • CapLeaker
        Leaking Member
        • Dec 2014
        • 8340
        • Canada

        #4
        It’s just a TVS over volt protection diode. It’s not really needed if you have a good PSU, just for data recovery.

        Comment

        • MrBojangles
          Member
          • Jul 2024
          • 49
          • Sweden

          #5
          Thank you all for the advice. You guys are very knowledgeable. I will remove the component and attempt data rescue again.

          Wish me luck!

          Comment

          • adamok7
            Member
            • Feb 2023
            • 20
            • Kazakhstan

            #6
            It is a TB13A_V714, TBxxx_Vxxx - TFMBJ13A or SMBJ13A (TRANSIENT VOLTAGE SUPPRESSOR)

            Comment

            • MrBojangles
              Member
              • Jul 2024
              • 49
              • Sweden

              #7
              Removing the diode kicked the disk alive and the data is safe now. Brilliant. Thank you all so much for the tips

              Comment

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