The MMSZ5233B with Single 5.7V~6.3V 350mW 6V SOD-123 ROHS Zener Diodes is a type of non-linear two-terminal semiconductor device manufactured by Wpmtek. It is used for electrostatic protection and voltage regulation. It is designed to operate in applications with power dissipation of up to 350mW. It has a breakdown voltage of 6V and a maximum operating temperature of 155°C. It is packaged in SOD-123 and is RoHS compliant.