The SA120A is a TVS (transient voltage suppressor) diode manufactured by Yageo and is designed to protect electronic systems from high voltage transients. This diode has a working voltage range of 193V-133V-120V and is RoHS compliant, meaning that it does not contain any hazardous materials and is therefore environmentally friendly. The SA120A is intended for use in short-circuit protection circuits and is ideal for portable electronics, power supplies, and communication systems.