IEC61000-4-2 and IEC 61000-4-5 are designed to ensure that electronic systems will not be degraded or destroyed by ESD in the everyday environment.
1. IEC 61000-4-2 test (ESD immunity test: Human body model)
As is the case with the HBM, this test simulates a discharge that might be released from a charged human body. Two methods are used for ESD testing:
- Direct discharge: Tests a discharge that might occur when a human directly touches an exposed metal surface of a system or a device.
- Air discharge: Tests a discharge that might occur between equipment under test (EUT) and a discharge gun through an air layer when the surface of the EUT is coated with resin or other coating materials.
These ESD tests are stipulated in IEC 61000-4-2 from the International Electrotechnical Commission (IEC).
Toshiba’s ESD protection diodes are tested using both direct and air discharge methods.