The MMSZ4687T1G is a surface mount Zener diode manufactured by ON Semiconductor, providing a voltage of 4.3V with a power dissipation of 500mW. It is a low-voltage, low-current part, with a 6.2V operating voltage and 500mW power handling capability. Its compact 2-pin, SOT-223 package is ideal for space-constrained applications. The device features reflect a low forward voltage of 0.7V and a high reverse breakdown voltage of 5.2V. The MMSZ4687T1G offers excellent capacitance protection, improved package reliability, and improved thermal resistance. It is ideal for limiting voltage in digital and analog circuits as well as applications that need reliable and consistent reverse voltage protection.