DIN EN 61643-331:2004 Components for low-voltage surge protective devices - Part 331: Specification for metal oxide varistors (MOV) (IEC 61643-331:2003); German version EN 61643-331:2003
2004DIN EN 61643-331:2004 Components for low-voltage surge protective devices - Part 331: Specification for metal oxide varistors (MOV) (IEC 61643-331:2003); German version EN 61643-331:2003