The MMSZ5252A is a Zener diode in the SOD-123 (Flat, small outline diode) package, and is manufactured by Panjit. It is RoHS compliant, meaning that it contains no hazardous materials. The MMSZ5252A is designed to provide stable voltage-regulation over varying currents. It is a two-terminal device, with a reverse breakdown voltage of 5.1V and a power dissipation of 500mW. The device has a high-reliability rating and is suitable for a variety of applications such as voltage reference circuits, ESD protection circuits, and voltage regulators.