IEC 61643-321:2001

Components for low-voltage surge protective devices - Part 321: Specifications for avalanche breakdown diode (ABD)

IEC 61643-21:2000/COR1:2001

Corrigendum 1 - Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods

IEC 61643-21:2000

Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods