The SM4F78A-MS-H is a robust TVS (Transient Voltage Suppressor) Diode from FORMOSA MICROSEMI, available at Supreme Components International, an authorised distributor. This unidirectional diode is specifically designed to protect sensitive electronic equipment from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). With a reverse standoff voltage of 78V and a peak pulse power dissipation of 400W, the SM4F78A-MS-H effectively clamps overvoltage events, preventing damage to downstream components. Its DO-221AC package offers a compact footprint for efficient board layout. This TVS diode is ideal for applications requiring reliable overvoltage protection, such as automotive electronics, industrial control systems, and consumer electronics. Trust Supreme Components International for genuine FORMOSA MICROSEMI components and expert support.