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Suitable replacement for shorted rectifier

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    Suitable replacement for shorted rectifier

    Dealing with a 90W Astec PSU with a shorted 12V rectifier. What is a suitable replacement for the one shown? Not finding anything out there for this.


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    #2
    Re: Suitable replacement for shorted rectifier

    Fep16dt, this is the 200v version, I would use FEP16GT-E3/45 (400v) or FEP16JT-E3/45 (600v)
    Last edited by R_J; 09-22-2020, 08:12 PM.

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      #3
      Re: Suitable replacement for shorted rectifier

      "GI" is General Instruments. Per this, https://cdn.badcaps-static.com/pdfs/...f1f8a30f9f.pdf , I think that's a 150V part. Both Mouser and Digi-Key carry the part.

      The date code on the part looks like early 1989, so it might be worthwhile to check the output caps (and if you replace them, probably an older series would be better for stability).
      PeteS in CA

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        #4
        Re: Suitable replacement for shorted rectifier

        i'll echo what RJ sez. Digikey or mouser have plentiful.

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          #5
          Re: Suitable replacement for shorted rectifier

          For an old-ass PSU like that with a rather weak 12V rail, it probably really isn't that important what rectifier you get on the 12V rail.

          Though if you really wanted something closer to the original, just about any 16 Amp, 100-200V -rated FR (fast recovery) rectifier in TO-220 case would do.

          I agree with PeteS; check the output caps. They're over 30 years old now. Surely there are older e-caps still in service. But generally, if the device has been sitting powered off / unplugged for many years, it's best to check the caps or maybe even reform/recondition them before applying full power (that is, if you don't intend to replace them because they are bulky/expensive.)

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