The SMCJ85A with SMC (DO-214AB) TVS ROHS is a Transient Voltage Suppressor Diode manufactured by TWGMC. It is a one-time surge device designed to protect low voltage circuits from voltage spikes. The device is a type of unidirectional diode, which means it can only conduct electricity in one direction and can be used in a wide range of voltage and temperature applications. It has a maximum clamping voltage of 85V, a maximum peak pulse power dissipation of 500 watts, and a peak forward surge current of 64A. This SMCJ85A is a high-performance, transient voltage suppressor diode with a variety of features, including RoHS-compliant construction, ESD immunity, and a RoHS-conforming lead-free finish.