The Vishay SMF22A-HE3-08 is an ESD suppressor TVS diode with ESD protection. It is a SMF-type diode, and it has a do219-HE3 package. This device is designed to protect electronic circuits and components from Electrostatic Discharge (ESD). It has a metal oxide silicon field effect structure, designed to absorb and dissipate ESD energy. The diode also has a low leakage current and low clamping voltage, making it suitable for use in consumer electronics and other sensitive applications. The SMF22A-HE3-08 has an operating voltage of 8V, a maximum working current of 1A, and a working temperature range of -40°C~+125°C. Its typical peak pulse power is 14W, and it has an ESD protection up to 15kV air discharge. It complies with the Joint Electron Device Engineering Council (JEDEC) J-STD-020A standard.