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Old 22nd Feb 2021, 4:31 pm   #1
Al (astral highway)
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Join Date: Nov 2006
Location: London, UK.
Posts: 3,452
Default Running DC brushless PC cooling fans

Hi folks,

I have a few quite generic fan pulls from SMPS.

One here is rated 12V (quite typical) and 120mA. Out of curiosity I just ran it at different voltages, above and below the V rating. I know these things are normally run at variable speeds depending on load conditions and CPU temperature.

This only draws the rated 120mA at 19.4V.

Presumably this means it's perfectly fine to be run at this voltage?

In fact, could it be run even higher, for a few tens of mA above the rating? It won't be in continuous duty, just runs of 5 mins at a time maximum.

Thanks in advance,

Best wishes, Al

"Plans are useless but planning is indespensible..." (Eisenhower).
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