SMAJ400A is an SMD-type (Surface Mount Device) Transient Voltage Suppressor (TVS) manufactured by Fosan. It is designed to protect electronic equipment from voltage spikes and other forms of circuit-destructing transient events. It is rohs compliant, meaning that it follows the most up-to-date standards for hazardous substances and materials set out by the European Union. It has an operating voltage range of 5.5 to 220 Volts, a power dissipation of 400 Watts, a working temperature of -55°C to 150°C, and a breakdown voltage of 400V. This component is suitable for use in a wide variety of applications and industries, including data processing, networking, automotive devices, and consumer electronics.