Description:

Electrostatic discharge (ESD) is the assessment of equipment’s resistance to direct discharge or electrostatic field interference generated when exposed to external static sources, such as charged human bodies or charged devices. ESD can be categorized into direct discharge and indirect discharge.

Direct discharge: It includes contact discharge and air discharge. Contact discharge primarily targets the exposed metal surfaces of the equipment. Air discharge mainly focuses on the areas of the equipment’s surface covered with insulating materials.

Indirect discharge: It only involves contact discharge. Discharge is conducted on horizontal coupling plates and vertical coupling plates at a certain distance from the equipment. The coupling plates are grounded through two 470 kohm resistors. Therefore, when discharging on the coupling plates, the static charge on the coupling plates does not immediately dissipate to the ground. Instead, it forms an electrostatic field, which interferes with the equipment.

Scope: The test voltage range for direct discharge and contact discharge is 0.2 kV to 30.5 kV.

Scope of Application:

Electronics and electrical products.

Image of Testing Equipment: