SMCJ20A is an unidirectional, three-terminal, Transient Voltage Suppressor (TVS) diode manufactured by Taiwan-based TWGMC. It is a surface-mount device (SMD) packaged in a Dual In-line Package (DO-214AB) in compliance with Restriction of Hazardous Substances (RoHS). It has a peak power rating of 20 Amps with an 8/20 us pulse width and a working breakdown voltage (VWM) of 20 Volts. SMCJ20A can prevent short-term overvoltage which occurs due to electrostatic discharges, environmental radiation, and other overvoltage transient events. It is suitable for applications including automotive, telecommunications, consumer electronics, industrial, and other commercial applications.