The SMCJ78A with SMC(DO-214AB) TVS ROHS, manufactured by TWGMC, is a transient voltage suppression diode. It is designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. The SMCJ78A is a unidirectional device, meaning it only allows current to pass in one direction and is encased in the SMC case style with a DO-214AB dimension. Its peak pulse power is 600W and maximum clamping voltage is 140.2V, with a maximum reverse current of 0.5 mA. It can be used in many applications such as notebook computers, LCD displays, mobile handsets, telecom devices, automotive equipment, and game consoles.