Power Supply Heat Loss

Greetings,

When the cut sheet for a power supply states that the heat losses are 20 Watt for a 240 Watt DC-DC converter, does this mean that the power supply consumes 260 Watt at full load? Since the data sheet assures the specifier that the PS will deliver 10Amps at 24Vdc, it would make sense that the heat losses are on top of 240W rated value.

Thanks,
Engineer_UA

That's been my assumption, but I've never tested it.

It sounds like a reasonable assumption. The rated value would need to reflect the output capability in order to be valid, and energy lost is energy lost.