The Formosa BZT52B20S Zener Diodes SOD-323 RoHS is a low-voltage, high-power bi-directional device designed for applications that require a stable source of voltage. The device consists of two Zener diodes connected in series, which means that it can act as both a voltage protector and a voltage regulator. The SOD-323 RoHS marking ensures that the device has been designed and manufactured in compliance with the stringent RoHS regulations governing the manufacture of electronic components in the EU. Additionally, the device can withstand a maximum voltage rating of 20V, a maximum power dissipation of 500mW, and a maximum current rating of 350mA. Furthermore, the device operates at a maximum junction temperature of 150°C and an operating temperature range of -40°C to +85°C.