Transistors are 3 legged active semiconductor devices.

Child Pages

Bipolar Junction Transistors (BJTs)
Schematic symbols, important parameters, biasing techniques, constant-current LED drivers, example circuits and more information about BJT transistors.
Insulated-Gate Bipolar Transistors (IGBTs)
Switching speeds, temperature co-efficients, and more information about Insulated Gate Bi-polar Transistors (IGBTs).
Important parameters, example schematics, the body effect, isolated gate drives, dead time, thermal stability, failure modes, part recommendations and more information about MOSFETs.

Transistor Part Number Standards

If you are lucky enough, the transistors you have will follow a naming standard. This allows you two identify (or partially identify) a transistor from bits of it’s part number.