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Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

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    #1

    Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

    Hi,

    I am trying to obtain a rough determination as to whether a component is burned out or not. It is a 10NK70ZFP Zener-Protected SuperMESH MOSFET and can be found here: https://cdn.badcaps-static.com/pdfs/...846f9f6885.pdf

    Can anyone give me any advice on what kind of readings I should get if the part is working properly?

    Thanks!
    Steve
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    #2
    Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

    I've removed the component from the circuit and checked it on the 20 ohm scale.

    G-D and D-G measure about .4 ohms. This is not a good thing I presume?

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      #3
      Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

      SORRY - MISTAKE:

      The measurements above should be S-D and D-S measure about .4 ohms, even after I short the source & gate together to discharge it.

      Is this a bad thing?

      Comment

        #4
        Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

        Originally posted by stevekasian View Post
        SORRY - MISTAKE:

        The measurements above should be S-D and D-S measure about .4 ohms, even after I short the source & gate together to discharge it.

        Is this a bad thing?
        Good / bad is an ambiguous concept. For example, your doctor tells you your chest pains are due to a 90% blockage of two of the arteries in your heart. They can easily insert stents. You'll be out of the hospital the next day, normal activities in a week. Is this good news or bad news?

        Similarly, yes, the MOSFET is bad. On the other hand, you can easily replace it rather than spend hours trying to locate a failed component.

        PlainBill
        For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

        Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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          #5
          Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

          Thanks PlainBill. Much appreciated wisdom.

          Correct me if I'm wrong, but isn't it a good thing to know whether a high power component, such as a particular MOSFET, is bad in order to help realize what other potential problems may exist with the circuit?

          Thanks,
          SK

          Comment

            #6
            Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

            I think the more you know about it the better, whether or not you actually find out is a different matter...
            "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
            -David VanHorn

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              #7
              Re: Testing a Zener-Protected SuperMESH MOSFET With A Multimeter

              Originally posted by stevekasian View Post
              SORRY - MISTAKE:

              The measurements above should be S-D and D-S measure about .4 ohms, even after I short the source & gate together to discharge it.

              Is this a bad thing?

              Hi, and finally... it was good or bad? I have the same doubt
              Regards

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