The SMCJ22CA is a surface mount bidirectional Transient Voltage Suppression (TVS) diode manufactured by GOODWORK. It is packaged in a SMC (DO-214AB) and conforms to RoHS standards, meaning it is free from lead, mercury, cadmium, PBB, PBDE, and other hazardous materials. Its main function is to clamp transient voltage to protect other components from over voltage events. The SMCJ22CA has a maximum breakdown voltage of 22V and maximum peak pulse current of 600A. It is widely used to protect sensitive electronics from voltage spikes, transients, and Electrostatic Discharge (ESD) caused by electrical noise.