The BZT55C3V9-Q1-H Zener diode, manufactured by Formosa Microsemi, is a crucial component for voltage regulation and circuit protection. With a Zener voltage of 3.9V and a power dissipation of 500mW, this diode effectively stabilizes voltage levels in electronic devices. Housed in a compact SOD-80 package, it's suitable for applications where space is limited. Supreme Components International is an authorized distributor of Formosa Microsemi components, ensuring that you receive genuine, high-quality products. This Zener diode is commonly used in voltage regulators, overvoltage protection circuits, and clipping circuits. Its robust design and precise voltage characteristics make it a reliable choice for a wide range of electronic applications. Trust Supreme Components International for all your component needs.