DIN EN 61643-321:2003 Components for low-voltage surge protection devices - Part 321: Specifications for avalanche breakdown diodes (ABD) (IEC 61643-321:2001); German version EN 61643-321:2002
2003DIN EN 61643-321:2003 Components for low-voltage surge protection devices - Part 321: Specifications for avalanche breakdown diodes (ABD) (IEC 61643-321:2001); German version EN 61643-321:2002