The ESD9L3.3ST5G is an ultra-low capacitance ESD protection diode designed to protect voltage-sensitive components from transient voltage events. It operates with a working peak reverse voltage of 3.3 V and features a typical capacitance of just 0.5 pF. The device provides a minimum breakdown voltage of 4.8 V and maintains a low maximum reverse leakage current of 1.0 µA. Its excellent clamping capability, fast response time, and ultra-low capacitance make it ideal for protecting high-frequency circuits like USB 2.0 high-speed data lines and antenna lines, especially in space-constrained designs.