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Circuit Breakers DC/AC rating

Discussion in 'Electronic Basics' started by Conrad, Robert, Jan 6, 2004.

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  1. I just bought a bunch of 10A circuit breakers from Digikey. They are going
    to be used on a 120V AC line. Problem is that they all have 35V DC printed
    on the side. Will they still work? I didn't know there where DC and AC
    breakers. I thought they worked like fuses where amps where the only
    triggering factor.
     
  2. Nick Hull

    Nick Hull Guest

    DC is much harder to break than AC because the AC extinguishes the arc.
    If it's good for 35vdc it's probably OK for 120vac but I'd hate to take
    it higher.
     
  3. You must use breakers rated for 120VAC or higher to protect 120V
    circuits.

    Breakers, fuses, and switches all have maximum voltage ratings - if
    you exceed these ratings, the device may arc over, rather than
    switching (or blowing) cleanly.
     
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