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Bench Power Supply Current Rating

Electrical Engineering Asked on January 22, 2021

When a bench power supply is rated for 0-30V, 0-5A, does that mean that it can supply more than 5A at voltages below 30V while keeping the max power constant, or is there a hard cap on the current?

2 Answers

The supply can deliver up to 5 amps at up to 30 volts.

The voltage and current ratings are both maximums, and are independent of each other - you can't expect to get 10 amps at 15 volts.

Correct answer by Peter Bennett on January 22, 2021

Depends on the power supply, but generally a bench power supply is rated at max everything, so that would be 5 A at 30 VDC, aka 150 W.

Answered by Stuggi on January 22, 2021

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