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Can you use a 40/5 uf in the place of a 30/5uf?


  • Jean-David Beyer
    Jean-David Beyer Member Posts: 2,666
    Can you use a 40/5 uf in the place of a 30/5uf?

    It depends what it is being used for. If just a filtering capacitor, then yes. If it is involved in timing or surge protection, perhaps not.
  • Ironman
    Ironman Member Posts: 7,336
    A/C Unit?

    Sounds like a dual cap from a condensing unit.

    You can go as much as 10% larger in micro-farad rating. So, no, you cannot replace a 30uf with a 40uf. That would be 33% over.

    You can always increase the voltage rating, though: i.e. a 370V cap can be replaced with a 440V cap of the same uf rating + 10%.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
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