ESD in the electronics industry is intended to be electrostatic discharge, now can be understood as anti-static, electrostatic protection and other meaning.

ESD diodes, static and discharge are the same.

The principle of ESD protection secondary is that when the voltage exceeds the on-voltage of the diode, it is on-ground discharge, and the normal signal can not reach the on-voltage will not be lost through the ground, and the esd voltage exceeds the on-voltage through the ground discharge to prevent damage to the interior.

ESD electrostatic discharge in the normal working process of electrical appliances, ESD is only shown as a very low capacitance (generally < 5pf) reactance characteristics, will not affect the normal electrical characteristics, and will not affect the signal and data transmission of electronic products; When the overvoltage at both ends of the device reaches the predetermined breakdown voltage, it quickly reacts (nanosecond level) to amplify the inter-electrode leakage current through the geometric series, so as to absorb and weaken the interference and influence of static electricity on the circuit characteristics. At the same time, due to the particularity of the composition of the ESD electrostatic impedance material, ESD is often through the absorption and dissipation of static electricity, that is, as a process of charge and discharge, to achieve electrostatic protection of the equipment, so the ESD electrostatic impedance device in the equipment is not easy to aging damage.