The BZT55B4V3A-H Zener diode, manufactured by Formosa Microsemi, is a crucial component for voltage regulation and circuit protection. With a Zener voltage of 4.3V and a power dissipation of 500mW, this diode provides a stable reference voltage in a compact SOD-80 package. Supreme Components International is an authorised distributor of Formosa Microsemi components, ensuring you receive genuine and high-quality products. This Zener diode is designed to maintain a constant voltage across its terminals when reverse biased, making it ideal for applications such as voltage stabilization, overvoltage protection, and clipping circuits. Its small size and robust performance make it suitable for a wide range of electronic devices.