The Bipolar Power Transistor (BPT), as a switching device for power applications, had a few disadvantages.

This led to the development of the power MOSFET (Metal Oxide Semiconductor Field

Effect Transistor). The power MOSFET is used in many applications such as SMPS (Switched

Mode Power Supplies), computer peripherals, automotive, and motor control. Continuous research

and improvement have provided it with ideal characteristics for replacing the BJT (Bipolar Junction

Transistor).This application note is a general descr iption of power MOSFETs and a detailed presentation

of items from FSC’s data book specifications.