Abstract: Aircraft electrical components operate on many different voltages both AC and DC. Many aircraft power systems use 115 volts (V) AC at 400 hertz (Hz) or 28 volts DC. The most lighting services on aircrafts are powered by 28 V DC. They vary from 600 W for landing lights to few watts for minor internal illumination usages. The input voltage for the system is 115 V AC whereas the 600watts landing light uses only 28 V DC. It so needs to rectify the three-phase input AC voltage to DC voltage for the voltage requirement of the landing light.