The SM4F45A-MS-H is a Transient Voltage Suppressor (TVS) diode from FORMOSA MICROSEMI, available at Supreme Components International, an authorised distributor. This diode is specifically designed to protect sensitive electronic equipment from voltage transients induced by lightning, electrostatic discharge (ESD), and inductive load switching. With a power dissipation rating of 400W and a reverse standoff voltage of 45V, the SM4F45A-MS-H effectively clamps transient voltages to safe levels, preventing damage to downstream components. Its DO-221AC package allows for easy surface mounting and efficient heat dissipation. This TVS diode is suitable for a wide range of applications, including automotive electronics, industrial equipment, and consumer electronics, where reliable surge protection is crucial. Trust Supreme Components International for genuine FORMOSA MICROSEMI components.