The 5.0SMDJ43CA is a surface mount device (SMC) TVS diode with a DO-214AB case manufactured by Yageo. The device is compliant with the Restriction of Hazardous Substances (RoHS) directive of the European Union. It is designed to protect sensitive electrical components from surges of high voltage and current. The SMC TVS diode can be used for a variety of different applications, including overvoltage protection, general power supply protection, and signal line protection.