Advice needed regarding switching psu recap

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  • Elco
    New Member
    • Aug 2011
    • 3
    #1

    Advice needed regarding switching psu recap

    I am going to recap a dvr PSU in order to extend its lifetime.

    Among others there are three Samxon KM series 0.22uf 50V caps on the psu board and I have hard time finding suitable replacement for these. If I understand correctly these small capacitance caps are not stressed as much as the higer rated ones in a switching power supply and I wonder if replacing these is even necessary? Any advice will be greatly appreciated!
    Tags: None
    • Evil Lurker
      Warranty Voider
      • Feb 2011
      • 454
      #2
      Re: Advice needed regarding switching psu recap

      I say go for it. Nichicon VZ series would probably work in a pinch.

        Comment

        • PCBONEZ
          Grumpy Old Fart
          • Aug 2005
          • 10661
          • USA
          #3
          Re: Advice needed regarding switching psu recap

          You haven't entered your location in your profile which makes it hard to give advice on where to get parts.
          .
          Mann-Made Global Warming.
          - We should be more concerned about the Intellectual Climate.
          -
          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
          - Dr Seuss
          -
          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
          -

            Comment

            • Elco
              New Member
              • Aug 2011
              • 3
              #4
              Re: Advice needed regarding switching psu recap

              Thanks for replies. The problem is that I'm located in Finland and there seems to be limited availability for low esr capacitors locally (could not find a source for Nichicon VZ series here).

              I guess it's not feasible to use a ceramic capacitor for replacement?

                Comment

                • PCBONEZ
                  Grumpy Old Fart
                  • Aug 2005
                  • 10661
                  • USA
                  #5
                  Re: Advice needed regarding switching psu recap

                  I don't really know what you are looking at but if lytics were used in the first place then probably not.
                  There are a lot of caps in that range to choose from LXZ, FC, PW, PM to name a few.

                  In Finland you have RS Components and Farnell.
                  http://fi.rsdelivers.com/
                  http://fi.farnell.com/
                  .
                  Mann-Made Global Warming.
                  - We should be more concerned about the Intellectual Climate.
                  -
                  Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                  - Dr Seuss
                  -
                  You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                  -

                    Comment

                    • digge
                      Badcaps Veteran
                      • Apr 2006
                      • 296
                      #6
                      Re: Advice needed regarding switching psu recap

                      If you want to source locally i think ELFA has some low ESR and local distribution center. Like Suncon/Sanyo WX for instance. If you want lower ESR, like motherboard grade and stuff you might have to go for abroad orders. ELFAs finish site is at www.elfaelektroniikka.fi

                      btw, KM is a General Purpose series from what i can see so just about anything would do ok there.

                        Comment

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