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Electronics Adapter Question about mA Answered

Hi guys I have an electronic device requiring 50-100mA at 5V. I only have an adapter that is rated at 1200mA at 5V. Is it safe to use the adapter? Thanks

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westfw
westfw

12 years ago

It's "safe" only if it's a regulated supply. unregulated supplies are prone to drifting way above rated voltage at low currents. A 1200mA 5V supply is likely to be regulated.

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LasVegas
LasVegas

12 years ago

Yes. Your 50-100mA load needs 0.05 to 0.1 Amps. Your 1200mA adapter supplies 1.2 Amps. That's 12 times what you need.

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noneother
noneother

Reply 12 years ago

Ah ok. So even if there's an excess of Amps there's no possible harm done right because the device will only use what it needs?

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gmoon
gmoon

Reply 12 years ago

Yep. The device itself 'draws' a certain amount of current. That more current is potentially available isn't a problem.

If you hook it up to power with greater (out of spec) voltage, it will force more current through a device, and that's what fries stuff...