The MM1Z18BW with SOD-123W is a Zener diode ROHS (Restriction of Hazardous Substances) component manufactured by Jingdao. It has a Zener voltage of 1.8 volts, with a power dissipation of 500mW, making it ideal for overvoltage protection and voltage regulation purposes. The SOD-123W package is a small, surface-mount, 3-lead design, with a keenly low profile allowing good density and excellent power dissipation capabilities. It is suitable for lead-free soldering and is compliant with the RoHS (Restriction of Hazardous Substances) directive.