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Does mini 12V DC diaphram water pumps like this get really hot after running for 5 min? (sh.itjust.works)

submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

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I'm trying to use it as a water pump for my aquarium. I'm using a 6V 4.5AH battery with a DC step up convertor to power the pump. After about 5 minutes it gets really hot. Is this expected?

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[–] [email protected] 5 points 6 months ago* (last edited 6 months ago) (1 children)

It was probably a marginal product deliberately overdriven beyond "good design norms" to make it look good for the currently-missing data sheet.

Put it on a variable voltage power supply, run it at 6v to 12v in one volt steps, and measure its output volume for ten seconds at each step.

You might find that you still have adequate flow for your situation at a lower, cooler, voltage.

[–] [email protected] 2 points 6 months ago* (last edited 6 months ago)

That's a good suggestion. Thanks, I'll try it out.