A comprehensive guide to understanding transistor symbols and their types, crucial for accurate circuit design and analysis—discover more inside!

Transistor Symbols The Transistor is a semiconductor device provided with three terminals called base, emitter and collector. It is used to work in electronic circuits as a rectifier, amplifier and switch. These symbols can be represented inside a circle.

There are two types of standard (bipolar junction) transistors, NPN and PNP, with different circuit symbols. The letters refer to the layers of semiconductor material used to make the transistor. Most transistors used today are NPN because this is the easiest type to make from silicon.

Semiconductor devices that provide both switching action and signal amplification are called transistors, but nowadays this term is rather uninformative because there are so many different types of transistors. In this article, we'll take a look at the symbols for various transistors. Related Information