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



Reference EN 62305-4:2011
Title Protection against lightning - Part 4: Electrical and electronic systems within structures
Project Number 22663
Abstract/Scope IEC 62305-4:2010(E) provides information for the design, installation, inspection, maintenance and testing of electrical and electronic system protection (LPM) to reduce the risk of permanent failures due to lightning electromagnetic impulse (LEMP) within a structure. This second edition cancels and replaces the first edition, published in 2006, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: 1) Isolating interfaces capable of reducing conducted surges on lines entering the structure are introduced. 2) Minimum cross-sections for bonding components are slightly modified. 3) First negative impulse current is introduced for calculation purposes as electromagnetic source of harm to the internal systems. 4) Selection of SPD with regard to voltage protection level is improved to take into account oscillation and induction phenomena in the circuit downstream of SPD. 5) Annex C dealing with SPD coordination is withdrawn and referred back to SC 37A. 6) A new informative Annex D is introduced giving information on factors to be considered in the selection of SPDs.


Current Stage code 6060
Current Stage code date 2011-02-25
Current Stage code deadline 2011-09-20
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 81
Reference Document IEC 62305-4:2010 (MOD)
ICS 29.020 - Electrical engineering in general
91.120.40 - Lightning protection
Keywords Lightning; Protection; Stucture; Electronic systems
Note Supersedes EN 62305-4:2006 + corr. Nov.2006 * Incorporates FprAA (pr=23141)
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2011-02-25 2011-09-20 export to doc file  EN  FR  DE
5099 2011-01-13 2011-02-03  
5060 2010-11-08 2010-12-20 export to doc file  EN
5020 2010-09-03 2010-11-05  
3090 2010-04-16 2010-06-10  
5060 2010-02-22 2010-03-08 export to doc file  EN
5020 2009-09-18 2010-02-19  
1090 2009-09-15 2009-09-18  

Implementation Dates

date of Ratification (DOR) (1) 2011-01-13
date of Availability (DAV) (2) 2011-02-25
date of Announcement (DOA) (3) 2011-07-13
date of Publication (DOP) (4) 2012-01-13
date of Withdrawal (DOW) (5) 2014-01-13


Supersedes EN 62305-4:2006
EN 62305-4:2006/corrigendum Nov. 2006
Superseded by  
Normative reference (6) IEC 60364-5-53
EN 60664-1
EN 61000-4-5
EN 61000-4-9
EN 61000-4-10
IEC 61643-1
CLC/TS 61643-12
EN 61643-21:2001
CLC/TS 61643-22:2006
EN 62305-1
EN 62305-2
EN 62305-3

(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.