International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61643-331:2003
Title Components for low-voltage surge protective devices - Part 331: Specification for metal oxide varistors (MOV)
Project Number 12902
Abstract/Scope Details the test specifications for metal oxide varistors (MOV), which are used for applications up to 1000 V a.c. or 1500 V d.c. in power line, or telecommunication, or signalling circuits. The MOVs are designed to protect apparatus or personnel, or both from high transient voltages. Does not deal with hybrid devices. Does not apply also to mountings and their effect on the MOVs characteristics.


Current Stage code 6060
Current Stage code date 2003-07-17
Current Stage code deadline 2004-04-01
Deadline date for vote  


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IEC Technical Body IEC/SC 37B
Reference Document IEC 61643-331:2003 (EQV)
ICS 31.040 - Resistors
Keywords Surge; Protective device; LV; Varistor; Metal oxide
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2003-07-17 2004-04-01 export to doc file  EN
5099 2003-07-01 2003-09-01  
5061 2003-05-22 2003-07-01  
5020 2003-02-28 2003-05-02  
4099 2002-12-06 2002-12-30  
4020 2001-04-06 2001-09-07  
4093 2001-04-03 2001-04-06  
4020 2001-04-03 2001-04-06  
3099 1998-11-12 1999-04-12  

Implementation Dates

date of Ratification (DOR) (1) 2003-07-01
date of Availability (DAV) (2) 2003-07-17
date of Announcement (DOA) (3) 2003-10-01
date of Publication (DOP) (4) 2004-04-01
date of Withdrawal (DOW) (5) 2006-07-01


(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.