SMD Transistors

A three terminal semiconductor electronic device is called transistor. Transistors are widely used in electronic appliances such as computers, radio,audio video equipment, bio medical instrument etc.A transistor is a three layer semiconductor which consist a very thin central layer of one type of semiconductor material sandwiched between two relatively thick layer of second type.A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.