A power transistor typically comprises a plurality of transistor cells or unit elements in a semiconductor die with the cells connected in parallel for amplifying an input signal. There are different types of power transistors like standard speed transistor, fast speed transistor, ultra fast speed transistor and many other available in the market nurturing the needs of buyers depending on different industrial uses. It is comprises of different VA ratings and are suitably applied in ac frequency inverter, battery float charger, controllers, induction heater and furnaces, power plants, textile control panels and for a large number of other different applications. Power transistors are available in various size, power, shape, frequency, temperature, voltage, model etc and provide a variety of features and functions. They are also made as per the specifications and requirement of the customer. These are used in many industrial sectors for different industrial purposes.