Help sourcing replacement / alternative chip

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  • Jdown79
    New Member
    • Sep 2020
    • 9
    • Australia

    #1

    Help sourcing replacement / alternative chip

    Hi guys, this chip appears to be shorted to ground. Continuity tests to 20V power pin on one side, then the entire other side is continuity with ground. Also heats up to ridiculous temperatures.
    What alternative chips can I use in place? Or where could I source a replacement. I can't even seem to find documentation on the chip.
    Thanks in advance
    Attached Files
    Last edited by Jdown79; 09-24-2020, 09:14 PM.
  • R_J
    Badcaps Legend
    • Jun 2012
    • 9535
    • Canada

    #2
    Re: Help sourcing replacement / alternative chip

    It is a mosfet, Alpha & Omega AON7408
    Attached Files
    Last edited by R_J; 09-24-2020, 09:39 PM.

    Comment

    • Jdown79
      New Member
      • Sep 2020
      • 9
      • Australia

      #3
      Re: Help sourcing replacement / alternative chip

      Originally posted by R_J
      It is a mosfet, Alpha & Omega AON7408
      Thanks so much, I've managed to source a replacement.
      Could you tell me please, how you found it? whats the easiest way to use the numbers on a chip to find online? thanks

      Comment

      • sam_sam_sam
        Badcaps Legend
        • Jul 2011
        • 6031
        • USA

        #4
        Re: Help sourcing replacement / alternative chip

        Originally posted by R_J
        It is a mosfet, Alpha & Omega AON7408
        I would also like to how you found this part number

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30967
          • Albion

          #5
          Re: Help sourcing replacement / alternative chip

          part number is etched on it - next to the company logo

          Comment

          • petehall347
            Badcaps Legend
            • Jan 2015
            • 4426
            • United Kingdom

            #6
            Re: Help sourcing replacement / alternative chip

            once side is all drains .maybe they all are supposed to go to ground .

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30967
              • Albion

              #7
              Re: Help sourcing replacement / alternative chip

              it takes a lot of heat to swap that package type - the entire underside is metal

              Comment

              • sam_sam_sam
                Badcaps Legend
                • Jul 2011
                • 6031
                • USA

                #8
                Re: Help sourcing replacement / alternative chip

                Originally posted by stj
                part number is etched on it - next to the company logo

                If you just google 7408 nothing comes up I did not recognize that company logo
                Last edited by sam_sam_sam; 09-25-2020, 07:58 PM.

                Comment

                • R_J
                  Badcaps Legend
                  • Jun 2012
                  • 9535
                  • Canada

                  #9
                  Re: Help sourcing replacement / alternative chip

                  If you know the logo, all you need to search is "alpha & omega 7408"
                  Last edited by R_J; 09-25-2020, 09:47 PM.

                  Comment

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