This standard applies to avalanche diodes as one of the components of surge protection devices (hereinafter referred to as SPDC), which is applied to the design and structure of surge protection devices connected to low-voltage power distribution equipment, transmission and signal networks. This standard The described test method applies only to a single ABD consisting of two terminals. However, ABD can be assembled in various ways as long as it is a single package with a fixed diode order. When this order is established, each diode is subject to this test method.
KS C IEC 61643-321-A:2014 history
2015KS C IEC 61643-321-A:2015 Components for low-valtage surge protective devices — Part 321: Specification for avalanche breakdown diode(ABD)
2014KS C IEC 61643-321-A:2014 Components for low-valtage surge protective devices ? Part 321: Specification for avalanche breakdown diode(ABD)