The SMA5953B single Zener diode is a 1.5 watt device that is designed for use in a range of control, regulation, and protection applications. This single Zener diode provides high-level overvoltage shunt regulation protection. It has a breakdown voltage of between 140 and 157 volts, and it is manufactured by Jingdao. This Zener diode is compliant with the ROHS regulations, meaning that it does not contain hazardous substances. The SMA5953B has a two-pin surface-mount package, making it well-suited for use in high-density circuit boards.