The BZT52C33S with 500mW 33V SOD-323 Zener Diodes ROHS is a high-quality electronic component manufactured by Hottech. It is a single-source, three-terminal voltage-restricting device. It is designed to provide a constant voltage by operating as a shunt regulator when exposed to low-voltage transients, surges, and spikes. The device is suitable for noise and transient suppression in many automotive, telecom, communications, and industrial applications. It comes in the SOD-323 package, which is a small, surface-mount version of an conventional axial leaded zener diode package. It offers up to 500mW of power dissipation and has a breakdown voltage of 33V. This device is RoHS compliant and is ideal for use in applications where space is a requirement.