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Thread: Automotive Fuse Application?

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    Crazy Diamond
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    Default Automotive Fuse Application?

    Ok so I purchased an automotive Duel USB power socket, it has a 10A 250V fuse in the connecting cable, now in a 12v or 24v vehicle that fuse is still rated at 10A, correct me if I'm wrong. It still blows at 10A current right?
    So the switched & fused circuit I intend to connect to is 12V 5A, as wiring is smaller, I think I need to change out this fuse for a 4A or 5A fuse, to protect the wiring loom it's plugged into as the dashboard is on the same circuit. Maybe even 3A, as that is likely the most that will be run from it.

    Looking for confirmation, TIA
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    LSemmens
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    Definitely fuse it for the weakest link in the circuit.
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    Quote Originally Posted by lsemmens View Post
    Definitely fuse it for the weakest link in the circuit.
    +1

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    Quote Originally Posted by Tiny View Post
    it has a 10A 250V fuse in the connecting cable, now in a 12v or 24v vehicle that fuse is still rated at 10A, correct me if I'm wrong. It still blows at 10A current right?

    Looking for confirmation, TIA
    Correct a fuse (one of those glass or ceramic jobs with metal caps on the end that melt a wire) will safely operate from >0V up to 250V.
    This is different to reusable fuses and circuit breakers(and switches) where 250V AC is good for only up to 30V DC in most cases due to strong arcing on the contacts that are often only a millimetre apart.

    Yes replace with 3-4A in your case.
    Last edited by Uncle Fester; 11-02-21 at 10:26 PM.
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    Good, my understanding of electrickery is still valid then. Thanks to all.
    Cheers, Tiny
    "You can lead a person to knowledge, but you can't make them think? If you're not part of the solution, you're part of the problem.
    The information is out there; you just have to let it in."

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