onsemi MM5Z3V9 Zener Voltage Regulators are designed to provide precise voltage regulation in compact applications. Packaged in an SOD-523 surface mount package, these onsemi diodes are ideal for high-density PC boards, cellular phones, and handheld portables where space is at a premium. With a 3.9V Zener voltage and a power dissipation of 500mW, the devices offer reliable performance and protection. The MM5Z3V9 Zener Voltage Regulators are RoHS-compliant and Lead-free, ensuring environmental safety. Small body dimensions and low height make them suitable for modern electronic devices requiring efficient voltage regulation.