Thyristors include a group of semiconductor devices primarily used in current switching applications. These devices consist of four or more semiconductor layers and include those listed here.
DEVICE
Silicon Controlled Rectifier (SCR)
TRIAC
Gate Turn-off Switch (GTO)
Silicon Controlled Switch (SCS)
DIAC
Unijunction Transistor (UJT)
Programmable Unijunction Transistor (PUT)
Shown here are a couple typical thyristor applications. There is an automatic day-night lighting control using a TRIAC and a start-stop motor SCR cuntrol circuit.
