MM1Z5B1 with Zener Diodes SOD-123 RoHS manufactured by Semtech is a SOD-123 RoHS-compliant, surface mount, reverse biased 3.3V Zener Diode. It provides a low-power, 5mA constant-current source and excellent Zener voltage regulation in a small, easy-to-mount package. It is ideal for applications such as intergrated circuits, radio circuitry, and low-voltage battery-powered systems. It features a simple, two-wire connection and is compatible with both soldering and reflow processes. It is also RoHS compliant, making it an optimal choice for environmentally conscious designs.