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AC or DC Fuse

Discussion in 'General Electronics Discussion' started by negash, Mar 18, 2010.

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  1. negash


    Mar 18, 2010
    I like buy a fuse 15A but I don't know type of fuse depend on using ac or dc.
    There is defferenc type of fuse in between ac & dc voltage .Simply I side there is defferent between ac fuse & dc fuse
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Generally speaking -- for low currents, and moderate voltages -- no.

    If you are replacing a blown fuse, then getting one that has the same physical package and rating will be OK.

    If you were designing a circuit, then you would have to look at the ratings to determine if the type was suitable, but for already manufactured equipment that will not be an issue.

    I just *know* that "somebody" will jump on me for saying what I just said.

    That information is totally wrong if you're talking about 3000A fuses. Here is a discussion of areas where AC and DC fuses are different. Here is a manufacturer of such fuses, with some products that are specially designed for DC.

    And here is a discussion about AC/DC on :)
  3. neon


    Oct 21, 2006
    there is a difference in AC and DC fuses besides amps and volts An AC fuses is rated to the average value of .639 of the voltage since it flatuate back and forth. Never the less fuses are there not to protect the circuit in general but to stop fires. A 1 amp fuse can blow at 2 amps they are protection not guaratees. a 500 amp fuse the size of 2 inch may have a silver strip of yes 1/8 inch the rest is sand to colapse and control the ionization flush. even fast fuses are not guaranty of precise 1 amp blow protection.
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