The SESD3Z5V is an electrostatic discharge (ESD) protection semiconductor device manufactured by SINO-IC. It is packaged in a SOD-323 package, which is compliant with the Restriction of Hazardous Substances (RoHS) directive. SESD3Z5V consists of one diode, which guards against damage from electrostatic discharge (ESD). This diode can handle high voltages up to 5V and can handle large currents up to 15 mA. The SESD3Z5V also features low leakage current and fast response time, making it suitable for high-speed applications.