MicroelectronicsThe JCT151K-800R is a one-way thyristor, made by JieJie Microelectronics, and encapsulated in a TO-252-2 (DPAK) RoHS package. It is classified as a silicon-controlled rectifier (SCR), or triac, which is used to regulate or control electrical currents in devices. It has a voltage rating of 800 volts and is adapted to work with applications that need to switch pulsed loads in a single direction. It is most often used in phase control applications such as industrial controllers, motor controls, lighting controls, and other switched power applications.