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



Reference EN 60721-2-1:201X
Title Classification of environmental conditions - Part 2-1: Environmental conditions appearing in nature - Temperature and humidity
Project Number 23467
Abstract/Scope IEC 60721-2-1:2013 presents classifications of open-air climates in terms of temperature and humidity. It is intended to be used as part of the background material when selecting appropriate temperature and humidity severities for product testing and application. This second edition cancels and replaces the first edition, published in 1982, and constitutes a technical revision. The main changes with respect to the previous edition are in the definitions of climate types.


Current Stage code 5099
Current Stage code date 2013-11-19
Current Stage code deadline 2013-12-17
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 104
Reference Document IEC 60721-2-1:2013 (EQV)
ICS 19.040 - Environmental testing
Note Will supersede HD 478.2.1 S1:1989 * 104/564/RVC + 104/564A/RVC established on 2011-11-04: FDIS decided*2014-02-03: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
5099 2013-11-19 2013-12-17  
5060 2013-06-03 2013-06-24 export to doc file  EN
5020 2013-03-29 2013-05-31  
3090 2011-09-16 2012-02-28  
5060 2011-09-12 2011-10-03 export to doc file  EN
5020 2011-04-08 2011-09-09  
1090 2011-04-05 2011-04-08  

Implementation Dates

date of Ratification (DOR) (1) 2013-11-19
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) 2014-02-19
date of Publication (DOP) (4) 2014-08-19
date of Withdrawal (DOW) (5) 2016-11-19


Supersedes HD 478.2.1 S1:1989
Superseded by  
Normative reference (6) EN 60721-1:1995
IEC/TR 62130

(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.