When electronic products and equipment are subjected to lightning surge, ESD electrostatic discharge or other transient voltages, ESD electrostatic diode can protect the circuit of electronic products from the damage caused by transient lightning surge and ESD electrostatic discharge. ESD electrostatic diodes are basically absorbed and dissipated by static electricity, resulting in a process of charging and discharging, so as to achieve electrostatic protection for electronic equipment, and ESD electrostatic resistors in equipment are generally not easy to age and damage. The working characteristics of ESD diode are consistent with TVS tube.