capacitor replace

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  • Ximen
    New Member
    • Dec 2010
    • 1
    #1

    capacitor replace

    Can i replace a 250v 680uf capacitor with a 200v 680uf capacitor..?


    i have a computer power supply with a capacitor of 250v 680uf blew up because i accidentally kept the voltage level low while i turned it on.. so is it possible to replace it with a low voltage and same resistance..

    hope i will get a good answer..



    here is the bad cap n the good one..
    Tags: None
    • goodpsusearch
      Badcaps Legend
      • Oct 2009
      • 2850
      • Greece
      #2
      Re: capacitor replace

      It is possible. I would not recommend it if the power supply in question has active PFC.

        Comment

        • steve2
          Senior Member
          • Dec 2010
          • 121
          #3
          Re: capacitor replace

          I wouldn't. There is probably a little over 200 vdc there and it would either have a very short life or a shortened life. They are rated at maximum working voltage for a reason.

            Comment

            • Th3_uN1Qu3
              Believe in
              • Jul 2010
              • 6031
              • Romania
              #4
              Re: capacitor replace

              If there isn't PFC (a big coil near those capacitors), you can safely replace it with a 200v. I've even seen 160vdc caps used in such positions (!!!). The power supply with the 160vdc caps was an AT PSU and worked fine for years till i decided to scavenge it for parts.
              Originally posted by PeteS in CA
              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
              A working TV? How boring!

                Comment

                • 370forlife
                  Large Marge
                  • Aug 2008
                  • 3112
                  • United States
                  #5
                  Re: capacitor replace

                  This looks like a low end half-bridge unit. The caps are connected in series for a total of 500V capacity. A bit much considering they usually have ~320V across these caps, so two 200V's should be fine.

                    Comment

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