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"Murphy was an optimist!"

Calling the electronic gurus January 29, 2008 11:25 am

Posted by Doug McCaughan in : Gadgets, Technology
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If I have a device that is labeled as needing 12v 250ma and I have a power supply that outputs 12v 1200ma am I putting my device at risk?

I seem to recall someone once telling me the milliamps don’t really matter but that doesn’t feel right.

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1. Eric - January 30, 2008

Power supplies indicate the voltage that they supply along with the MAXIMUM amount of current that they can supply at that voltage.

As long as the device you are using requires less than that amount of current everything is fine. Since your device only requires 250mA, a 1.2A supply will easily power the device without getting too hot.

Hope this helps.


2. Doug McCaughan - January 30, 2008

Excellent! Thank you! Now I can use my plasma mug again. That thing consumes 8 AA batteries faster than I can drink the beverage!