Electrostatic tolerance

The resistance to static electricity that allows power circuits and similar systems to continue functioning normally without failure.
There are three main causes of static electricity: discharge from a charged human body or clothing when in contact with the device, discharge received from other charged electrical or electronic equipment, and static charge generated by the device itself. To evaluate electrostatic discharge tolerance, electrostatic destruction testing is used, with specific methods designed to simulate each of the three causes. There are two ways to indicate the static electricity tolerance when exposed to external sources such as humans or other electronic/electrical devices. These are expressed by the peak value of pulse waves that apply the allowable static electricity repeatedly.
(1) Static tolerance during operation
The maximum value at which the power circuit can continue normal operation when static electricity is applied to any part of the enclosure under rated input conditions.
(2) Static tolerance during storage
The maximum value at which no failure or damage occurs when static electricity is applied to any part of the outer surface of the enclosure, including the input/output terminal section, while the power circuit input is turned off (i.e., not operating).