BS EN 61643-321:2002 PDF

What is BS EN 61643-321- Avalanche breakdown diode (ABD) used in surge protective devices about?

BS EN 61643-321 is 321 part of a multi-series standard used for Components for low-voltage surge protective devices that specifies the test method and procedure for avalanche breakdown diode (ABD). BS EN 61643-321 is useful in designing and manufacturing good quality surge protective devices. BS EN 61643-321 is applicable to avalanche breakdown diodes (ABDs) which represent   one type of surge protective device component (hereinafter referred to as SPDC) used in the design and construction of surge protective devices connected to low-voltage power distribution systems, transmission, and signaling networks. Test specifications in BS EN 61643-321 are for single ABDs consisting of two terminals. However, multiple ABDs may be assembled within a single package defined as a diode array. Each diode within the array can be tested to this specification.