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IRF520 vs IRF523

Discussion in 'CB Radio Modifications' started by carioux2008, Mar 22, 2017.

  1. carioux2008

    carioux2008
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    A coworker of mine has a Cobra 29LX with the IRF520 MOSFET modification. Well, it seems to have stopped working and I was wondering if I could use the IRF523 mosfet in its place (and retune of course). The biggest difference I see is that the breakdown voltage is lower (80v vs 100v) and the drain current is slightly lower. I woudl suspect that the drain current will lower the overall output of the radio, but honestly, i dont really care about that. just want to get him running again.



    What effects will the 523 have over the 520 thats in there already?
     

  2. Robb

    Robb
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    #2 Robb, Mar 22, 2017
    Last edited: Mar 22, 2017
  3. nomadradio

    nomadradio
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    The IRF520,521,522 and 523 all share the same Fairchild data sheet. Couldn't find the original one from International Rectifier. Only difference I can see is with the voltage and current rating. 520 is listed as 100 Volts and 8 Amps. The 523 shows 60 Volts and 7 Amps. Don't think that will be important in a 12-Volt radio.

    The all-important switching speed doesn't appear to be different, so I'd guess that it will work. Just don't know how to predict how well it will work.

    73
     

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