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Replacing Cooling Fans

Discussion in 'Troubleshooting and Repair' started by jai-krishna, Nov 12, 2014.

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  1. jai-krishna


    Nov 12, 2014
    Hi everyone,
    I am a complete novice with electronics & I want to replace 2 cooling fans in my sim racing wheel - they are rated as 5V DC 0.14A & 5V DC 0.19A.
    What will happen if I can only source replacements that offer Amp ratings of 0.02 either side of the standard specs? If the Amp rating is slightly lower or higher than standard what effect is it likely to have & is it okay to do this?
    Any advice is most welcome!
  2. Arouse1973

    Arouse1973 Adam

    Dec 18, 2013
    I would have thought the original design would have some over head to drive a bit more current, but unless you know the circuit you can't assume anything. As long as the working voltage of the fan is the same then running a lower power fan will be ok. Match the voltage and current if possible else go for a slightly lower power fan as long as it does the job.
    Gryd3 likes this.
  3. jai-krishna


    Nov 12, 2014
    Thanks for your reply Adam.
    So the Amp rating equals current equals power? Dropping from a 0.14A fan to say a 0.12A actually means it's a lower power fan? Does a 0.02A reduction equate to slightly lower power (providing adequate cooling is maintained)?
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    Power is voltage multiplied by current. So if voltage is constant (which it is), power is proportional to current. Lower power = lower current.

    Yes, if the existing fans draw 0.14A, you can replace them with ones that draw 0.12A, as long as the voltages are the same.

    Yes, the reduced current equates to reduced power drawn by the fan. As long as the new fans provide enough cooling, you're good to go.
  5. jai-krishna


    Nov 12, 2014
    That's great, many thanks for your support - much appreciated!
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