Yageo 400V 680uF measuring 580uF

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  • jm1234
    Senior Member
    • Jan 2024
    • 64
    • Slovakia
    #1

    Yageo 400V 680uF measuring 580uF

    Hi,
    I have a Yageo 400V 680uF that is currently measuring 580uF (Measured by UNI-T UT603). Does that normally qualify for replacement?
    Details: Siemens tumble dryer getting Error 25 after an hour or so, on all last 3 runs.
    I checked the circuit boards quickly and this capacitor sticks out, nothing visible, not even bulging though. It costs 12euro, so I'd like to get your feedback first. The main thing on that board seems to be a motor controller (for the compressor) https://www.mouser.sk/ProductDetail/...xvzUNHBQ%3D%3D.
    Thanks
    Daniel
    Tags: None
    • slybunda
      Senior Member
      • Feb 2012
      • 139
      #2
      Whats the esr like on the cap?

        Comment

        • jm1234
          Senior Member
          • Jan 2024
          • 64
          • Slovakia
          #3
          I don't have that kind of equipment, sorry.

            Comment

            • PeteS in CA
              Badcaps Legend
              • Aug 2005
              • 3581
              • USA, Unsure of Planet
              #4
              Electrolytic capacitors, typically, are +/-20%, so on the low end the cap can be as low 544uF.
              PeteS in CA

              Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
              ****************************
              To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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                Comment

                • jm1234
                  Senior Member
                  • Jan 2024
                  • 64
                  • Slovakia
                  #5
                  ok I got me an ESR tester and that cap shows 0.33ohm.

                    Comment

                    • jm1234
                      Senior Member
                      • Jan 2024
                      • 64
                      • Slovakia
                      #6
                      Originally posted by slybunda
                      Whats the esr like on the cap?
                      ESR is 0.33ohm, what do you think?

                        Comment

                        • slybunda
                          Senior Member
                          • Feb 2012
                          • 139
                          #7
                          Check with the datasheet for that cap to see how it stacks up.

                            Comment

                            • jm1234
                              Senior Member
                              • Jan 2024
                              • 64
                              • Slovakia
                              #8
                              Originally posted by slybunda
                              Check with the datasheet for that cap to see how it stacks up.
                              Easier said than done, . Mine has a sticker with what looks like a Bosh part number (BSH 9000558676), but I couldn't find any more details on that.
                              I'm attaching a photo in case it would help.
                              ​I only found one similar on web, not sure it's identical and the data sheet doesn't specify ESR: https://static6.arrow.com/aropdfconv...an_lv_2011.pdf
                              Any opinion welcome.
                              Attached Files

                                Comment

                                • petehall347
                                  Badcaps Legend
                                  • Jan 2015
                                  • 4439
                                  • United Kingdom
                                  #9
                                  look for . yageo lg series datasheet

                                    Comment

                                    • stj
                                      Great Sage 齊天大聖
                                      • Dec 2009
                                      • 31199
                                      • Albion
                                      #10
                                      http://www.paullinebarger.net/DS/Yag...G%20Series.pdf

                                        Comment

                                        • jm1234
                                          Senior Member
                                          • Jan 2024
                                          • 64
                                          • Slovakia
                                          #11
                                          Thanks guys, that indeed looks like what I have. However, I don't see ESR value in that data sheet.

                                            Comment

                                            • slybunda
                                              Senior Member
                                              • Feb 2012
                                              • 139
                                              #12
                                              https://il.farnell.com/epcos/b43511a...-in/dp/3437421

                                              This one has esr of 0.14

                                                Comment

                                                • jm1234
                                                  Senior Member
                                                  • Jan 2024
                                                  • 64
                                                  • Slovakia
                                                  #13
                                                  I switched the capacitor for a new one but that didn't solve it. Next up is likely the main invertor chip IKCS17F60F2A, but I'm not 100% sure, not even 51%. I guess it could still be the compressor leakage. The chip is 16.3eur on Ali, I guess I will try that. The whole invertor board is 335eur as original Siemens spare part.

                                                    Comment

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