I am rather new to electrical engineering topics.

I am currently building an audio player with multiple components (Raspberry Pi, Amplifier, LEDs, etc.) that all need 5V and all together will never exceed 5 A (actually 4). That’s why I though about getting a RS-25-5 power supply and build it right into the case.

My question is: What type of power cord do I need to feed the power supply OR/AND how much current will the power supply draw – will it be up to 5?

I’d love to be able to use a smaller power cord C7/C8 (rated for 2.5 Amps) instead of the huge C13/C14 (rated for 10 Amps) cable socket combo.

I am living in the EU. My wall socket provides 230V and maxes at 16A.

  • 2
    \$\begingroup\$ Are you talking about the power cord for 230 V ? You can use a small 2.5 A power cord on the 230 V side, only the 5 V side will have the 5 A ! On the 230 V side the current will be only: Output Power = 5 V * 5 A = 25 W, 25 W / 230 V = 0.11 A much less than 2.5 A so you can use the smaller power cord, no worries. \$\endgroup\$ Oct 9, 2015 at 9:45

1 Answer 1


You need to take a closer look at the specifications you linked to.

Output current is up to 5Amperes at5Volts.

Input is 0.4A when powered from 230VAC.

So, you can use the smaller power cable.

  • \$\begingroup\$ Thank you very much. I looked at the specs so often and never saw it. \$\endgroup\$ Oct 9, 2015 at 9:46

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