400 Hz power supplies draw less current than 60 Hz supplies allowing more current available for other systems on the aircraft.

A 400 Hz power supply generates less heat and operates much more efficiently than a 60 Hz power supply.

The magnetic devices in a 400 Hz power supply such as transformers , chokes and filters are smaller and lighter than those used in 60 Hz power supplies.

400 Hz power supplies are much less expensive to produce than power supplies with lower line frequencies.