SMBJ18CA with 29.2V, 20V, 18V SMB TVS ROHS is an electronic component manufactured by Me-TECH. It is a Transient Voltage Suppressor (TVS) Diode, which is designed to protect sensitive electronic components from damage due to transient surges in voltage. It features reverse-biased breakdown voltage from 18V to 29.2V, stand-off voltage of 20V, and a power dissipation rate of 500W. The device is RoHS-compliant, meaning it does not contain any environmentally hazardous substances.