The MM1Z4V3BW is a SOD-123W Zener Diode, manufactured by Jingdao, that is RoHS (Restriction of Hazardous Substances) compliant. It is a one-way current controlling silicon device that operates in reverse-breakdown mode. The MM1Z4V3BW is designed to provide a constant voltage reference with a wide operating temperature range (-55 ~ +175 °C). This diode has a high-current and high-withstand voltage capability, and it can maintain stable performance under harsh environmental conditions. It is ideal for use in telecommunications, automotive, industrial, consumer, and computer applications. Features and benefits of this diode include: low-profile surface mount design, low power dissipation, and low leakage current.