The SM4S is a high-performance Transient Voltage Suppressor (TVS) diode manufactured by SMC DIODES. Supreme Components International is an authorised distributor of SMC DIODES components, ensuring you receive genuine and reliable parts. This unidirectional TVS diode is designed to protect sensitive electronic circuits from voltage transients induced by lightning, electrostatic discharge (ESD), and inductive load switching. It features a power dissipation rating of 400W and is housed in a compact DO-214AC (SMA) package for easy surface mounting. The SM4S offers fast response times and low clamping voltage, making it suitable for a wide range of applications, including automotive, industrial, and consumer electronics. Its robust design ensures reliable performance in harsh environments, providing essential overvoltage protection for your valuable equipment.