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Thread: 20 or 25 F MFD microfarad capacitor, both work?

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    Join Date
    Apr 2014
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    USA
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    20 or 25 F MFD microfarad capacitor, both work?

    I have a motor that needs a new run capacitor.

    The current run capacitor is rated for 20 F MFD microfarads.

    Will a 25 F capacitor work?

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    Re: 20 or 25 F MFD microfarad capacitor, both work?

    Run capacitors should have the exact uf as the original designed for the motor.

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    Join Date
    Apr 2014
    Location
    USA
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    Re: 20 or 25 F MFD microfarad capacitor, both work?

    Quote Originally Posted by JamesW View Post
    Run capacitors should have the exact uf as the original designed for the motor.
    Can you tell me a little about the reason for that?

  4. Back To Top    #4

    Re: 20 or 25 F MFD microfarad capacitor, both work?

    The details are technical but it helps optimize the magnetic fields for best performance. The capacitor is sized for the motor. The wrong capacitor can adversely affect the performance of the motor. In some cases by a little and in some cases, by a lot.

    In any case, the general consensus is to use the exact one.

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