SD05.TCT is a SOD-323 ESD Protection Device manufactured by Youtai. This device is designed to protect sensitive electronic components and systems from damage caused by electrostatic discharge (ESD) and other transient voltage events. It uses a unique dual-protection circuitry that combines a Zener Diode and a Transient Voltage Suppressor (TVS). The component has an ESD protection level of 8 kV (human body model) and is RoHS compliant. It has a voltage rating of 5V and a peak pulse power rating of 500W.