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Current on PSU Fan

Discussion in 'Electronic Repair' started by [email protected], Feb 9, 2008.

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  1. Guest

    I need to replace the 80mm DC Fan in the PSU of my computer. The
    label on the broken fan show 0.25A. Do I need to replace it with a
    fan that has the same spec? I notice that many similar fans seem to
    be 0.08A or similar. I'm also curious to know what the 0.25A means?
    Is that the power that it will draw when it's spinning or the amount
    of power that it can handle? What would happen if I replaced it with
    a 0.08A fan?
  2. UCLAN

    UCLAN Guest

    The 0.25a is the current that the fans draws when in operation. The 0.08a
    fan will likely spin slower, move less air, and be quieter.

    Make sure both fans are 12vdc fans.
  3. jakdedert

    jakdedert Guest

    The 'move less air' above is important. Insufficient air flow is often
    the death of computer supplies. It's always safe to use a bigger, more
    powerful fan, and unless you're equipped to analyze how well it's
    working, it's best to replace with at least an equivalent unit.

    BTW, the .25A rating is the current that the fan draws (at 12 volts).
    Fan efficiency may vary, but unless a spec is given for air flow (CFM),
    To be safe, I'd match or exceed that rating, as it is all you have to go by.

  4. Meat Plow

    Meat Plow Guest

    Is it a "smart" PSU? Does the fan have 3 wires (red,black,yellow)? If so
    replace it with the same type.
  5. James Sweet

    James Sweet Guest

    That's the power it will draw, and is usually somewhat proportional to the
    amount of air it will move.
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