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Using Capacitor Value Other Than The Original Value

By on March 17, 2009


I got question like ” If my original capacitor value is …. then i can i use this value……? Well the answer can be yes and no and it all depends on what circuit your are working on it. If the capacitor is located at the secondary filter side say 680uf 16 volt and yes you can use a higher value like 1000 uf 25 or even 35 volt. However if the capacitor is part of the oscillator that produce a typical waveform say .22 uf then a replacement of .33uf may affect the overall output waveform and may also cause totally no output at all. In other words sensitive circuit that involve frequency the best is to use back the original value or even the same type of capacitor. That means if the cap is a metallized polyester cap then get back the same type and not putting mylar cap or ceramic cap. If the cap is in the filter section you can replace with a higher cap value but not lower cap value.

If you have no knowledge of what type of circuit you are working on then you can always “Try out” and test the result. Record every thing down from the test so that you can always refer back to the test result just in case in the future you come across a situation where you can’t get the original capacitor value.



  1. Waleed

    March 19, 2009 at 1:48 am

    i have this computer monitor and the main big capacitor was reall loud. any way, the value was 150uf and 400 volts. would it be ok if I replaced it with 220uf and 400 volts?

  2. Waleed

    March 19, 2009 at 3:01 pm

    tested it in the main power section. the replaced main filter cap. worked just fine. but the question here is, what caused the main filter to explode? may be a higher voltage? the fuse was gone too along with the mos-n-fet. the doides were ok. but replaced them any way..

  3. admin

    March 22, 2009 at 2:30 pm

    HI Waleed,

    Yes you can use 220uf 400v.


  4. admin

    March 22, 2009 at 2:31 pm

    Hi Waleed,
    It could be a sudden surge.



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