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  1. #1
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    Does It Make Sense to Connect SMD Fuses In Parallel Instead of Using Bigger One

    Hi everyone,
    I am going to use SMD fuses for protection needs of the electronics. Which way is better, using current rating of: 6A 0603 package SMD fuse or three 2A 0603 package SMD fuses?

    Using three fuses in parallel instead of one makes more sense to me since;
    Each one of them will get hot lesser,
    Since smaller current capacity fuses have smaller melting I2t, they will cut short circuit more quickly.

    Am I correct or doesn't It make any sense?

    Thanks in advance,
    Canberk

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  2. #2
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    Re: Does It Make Sense to Connect SMD Fuses In Parallel Instead of Using Bigger One

    Fuses -need- to get hot, to work.

    You cannot depend on current matching, and a set of
    (say) 1A fuses might fall like dominoes at 1A, 1A, 1A
    rather than 3A if there's significant current-hogging.

    There's a "must not open" current as well, and any fuse
    in a parallel gang should be high enough rated to stand
    that current. Which will push the "best case" (worst
    case max current to blow) even higher probably.



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  3. #3
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    Re: Does It Make Sense to Connect SMD Fuses In Parallel Instead of Using Bigger One

    Hi,

    Did you try it? Did you do some calculations?
    Please show the results.

    I think these are just assumptions, but other users may take it for real.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  4. #4
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    Re: Does It Make Sense to Connect SMD Fuses In Parallel Instead of Using Bigger One

    Additionally, it will cost 3 times as much.
    My batteries are recharged by "Helpful Post" ratings.
    If you feel that I've helped you, please indicate it as a Helpful Post



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