smd fuses

Discussion in 'General Electronics Chat' started by sony85, Sep 8, 2012.

  1. sony85

    Thread Starter Member

    Aug 26, 2012
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    What is the way to figure out what kind of SMD fuse are on a motherboard !
    Do i need the schematic or ... !
    I need very very tiny fuses black on a middle and silver on both ends !
    Around 0.5mm .
    Where I can order them from ?
    Its for laptop mobo . Thanks
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,395
    1,607
    Fuses are rated for the current they open for, and the voltage they block, in addition to their size (and several other parameters...). To pick a replacement fuse you need to know what your circuit runs at, and what voltage needs to be blocked.

    Digikey sells SMD fuses as does several other distributors.

    Keep in mind you may find something else down the line failed causing the fuse to blow in the first place. You may want to use a fuse of whatever rating you think it needs that you can obtain locally and jumper it into place just to check the motherboard still has some life left.
     
  3. sony85

    Thread Starter Member

    Aug 26, 2012
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    0
    Yes i did , but there aren't pictures of any smd fuses !
    this is the problem i don't know which to pick up !
     
  4. BSomer

    Member

    Dec 28, 2011
    433
    106
    Do you really need pictures? You could use the parametric search function at Digi-Key or Mouser to filter just your specs. For instance select the size of fuse, mounting style, voltage, and current. Then you can see a smaller range of fuses and get some specific datasheets to verify it is what you need.
     
  5. sony85

    Thread Starter Member

    Aug 26, 2012
    43
    0
    Thanks for your advice .
     
  6. sony85

    Thread Starter Member

    Aug 26, 2012
    43
    0
  7. DumboFixer

    Active Member

    Feb 10, 2009
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    From the link you posted :

    Current Rating = 500mA

    Other ratings are available
     
  8. sony85

    Thread Starter Member

    Aug 26, 2012
    43
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    yes but there are other ratings !
    I need to know exactly the right rating.
    There is also Response time , Melting i2t .
    How its works ?
     
  9. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,395
    1,607
    If you look at the page you posted there is a link to the Datasheets. Digikey always does that.

    If the information you seek is not there then we would not know it.


    http://www.bourns.com/data/global/pdfs/sf0402f.pdf
     
  10. sony85

    Thread Starter Member

    Aug 26, 2012
    43
    0
    Thanks i got it !
     
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