EN 61709:2011

Electric components - Reliability - Reference conditions for failure rates and stress models for conversion

IEC 61709:2011 gives guidance on how failure rate data can be employed for reliability prediction of electric components in equipment. Reference conditions are numerical values of stresses that are typically observed by components in the majority of applications. Reference conditions are useful since they are the basis of the calculation of failure rate under any conditions by the application of stress models that take into account the actual operating conditions. This standard also gives guidance on how a database of component failure data can be constructed to provide failure rates that can be used with the included stress models. This edition includes the following significant technical changes with respect to the previous edition: - the addition of a number of component types and the updating of models for a large number of component types; - the addition of annexes on reliability prediction, sources of failure rate data and component classification information.

Elektrische Bauelemente - Zuverlässigkeit - Referenzbedingungen für Ausfallraten und Beanspruchungsmodelle zur Umrechnung

Composants électriques - Fiabilité - Conditions de référence pour les taux de défaillance et modèles de contraintes pour la conversion

La CEI 61709:2011 donne des recommandations concernant les méthodes d'utilisation des données de taux de défaillance pour les prévisions de fiabilité de composants électriques d'équipements. Les conditions de référence sont des valeurs numériques de contraintes généralement observées sur les composants dans la plupart des applications. Ces conditions de référence sont utiles dans la mesure où elles permettent de calculer le taux de défaillance dans toutes conditions, en appliquant des modèles de contrainte qui tiennent compte des conditions de fonctionnement réelles. La présente norme donne également des recommandations concernant les méthodes pour constituer une base de données de taux de défaillance des composants afin que les taux fournis puissent être employés avec les modèles de contrainte fournis. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - l'addition de plusieurs types de composants et l'actualisation des modèles pour nombreux types de composants; - l'addition des annexes relatives aux prévisions de fiabilité, des sources des données de taux de défaillance et des informations relatives au classification des composants.

Električne komponente - Zanesljivost - Referenčni pogoji za pogostost odpovedi in modele obremenjevanja za pretvarjanje

Ta mednarodni standard podaja vodilo o uporabi podatkov o pogostosti odpovedi za napovedovanje zanesljivosti električnih komponent v opremi. Referenčni pogoji so številčne vrednosti obremenitev, ki se praviloma opazijo pri komponentah večine aplikacij. Referenčni pogoji so uporabni, ker so osnova za izračun pogostosti odpovedi pri vseh pogojih z uporabo modelov obremenjevanja, ki upoštevajo dejanske obratovalne razmere. Pogostosti odpovedi, navedene za referenčne pogoje, omogočajo realistično napovedovanje zanesljivosti v zgodnji fazi načrtovanja. Tu opisani modeli obremenjevanja so generični in se po potrebi lahko uporabijo kot osnova za pretvarjanje podatkov o pogostosti odpovedi pri teh referenčnih pogojih v dejanske obratovalne razmere, kar poenostavi napovedni pristop. Pretvarjanje podatkov o pogostosti odpovedi je dovoljeno le v določenih funkcionalnih omejitvah komponent. Ta standard tudi podaja vodilo o pripravi baze podatkov o odpovedi komponent, ki navaja pogostosti odpovedi, ki se lahko uporabijo z vključenimi modeli obremenjevanja. Določeni so referenčni pogoji za podatke o pogostosti odpovedi, kar omogoča enotno primerjavo podatkov iz različnih virov. Če so podatki o pogostosti odpovedi navedeni v skladu s tem mednarodnim standardom, dodatne informacije o točno določenih pogojih niso potrebne. Ta standard ne podaja osnovnih pogostosti odpovedi za komponente, pač pa zagotavlja modele, ki omogočajo pretvorbo pogostosti odpovedi, pridobljenih drugače, iz enih obratovalnih razmer v druge. Metodologija napovedovanja, opisana v tem standardu, predvideva, da se deli uporabljajo v okviru svoje življenjske dobe. Metode v tem standardu imajo splošno uporabo, vendar se specifično uporabljajo za izbor vrst komponent, kot je opredeljeno v točki 6 in točki E.2.

General Information

• Status: Withdrawn
• Publication Date: 11-Aug-2011
• Withdrawal Date: 28-Jul-2014
• ICS: 31.020 - Electronic components in general
• Technical Committee: CLC/SR 56 - Dependability
• Drafting Committee: IEC/TC 56 - IEC_TC_56
• Parallel Committee: IEC/TC 56 - IEC_TC_56
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 24-Mar-2020
• Completion Date: 24-Mar-2020
• Ref Project: SIST EN 61709:2011 - Electric components - Reliability - Reference conditions for failure rates and stress models for conversion

Relations

• Replaces: EN 61709:1998 - Electronic components - Reliability - Reference conditions for failure rates and stress models for conversion
• Effective Date: 29-Jan-2023
• Replaced By: EN 61709:2017 - Electric components - Reliability - Reference conditions for failure rates and stress models for conversion
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2011
(OHNWULþQHNRPSRQHQWH=DQHVOMLYRVW5HIHUHQþQLSRJRML]DSRJRVWRVWRGSRYHGLLQ
PRGHOHREUHPHQMHYDQMD]DSUHWYDUMDQMH
Electric components - Reliability - Reference conditions for failure rates and stress
models for conversion
Composants électriques - Fiabilité - Conditions de référence pour les taux de défaillance
et modèles de contraintes pour la conversion
Ta slovenski standard je istoveten z: EN 61709:2011
ICS:
21.020 =QDþLOQRVWLLQQDþUWRYDQMH Characteristics and design of
VWURMHYDSDUDWRYRSUHPH machines, apparatus,
equipment
31.020 Elektronske komponente na Electronic components in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61709
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 31.020 Supersedes EN 61709:1998

English version
Electric components -
Reliability -
Reference conditions for failure rates and stress models for conversion
(IEC 61709:2011)
Composants électriques -  Elektrische Bauelemente -
Fiabilité - Zuverlässigkeit -
Conditions de référence pour les taux de Referenzbedingungen für Ausfallraten und
défaillance et modèles de contraintes pour Beanspruchungsmodelle zur Umrechnung
la conversion (IEC 61709:2011)
(CEI 61709:2011)
This European Standard was approved by CENELEC on 2011-07-29. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61709:2011 E
Foreword
The text of document 56/1422/FDIS, future edition 2 of IEC 61709, prepared by IEC TC 56,
Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61709 on 2011-07-29.
This European Standard supersedes EN 61709:1998.
– the addition of a number of component types and the updating of models for a large number of
component types;
– the addition of annexes on reliability prediction, sources of failure rate data and component
classification information.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2012-04-29
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-07-29
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61709:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60300-3-2:2004 NOTE  Harmonized as EN 60300-3-2:2005 (not modified).
IEC 60721 series NOTE  Harmonized in EN 60721 series.
IEC 61360 series NOTE  Harmonized in EN 61360 series.
IEC 61360-1:2009 NOTE  Harmonized as EN 61360-1:2010 (not modified).
IEC 61360-4:2005 NOTE  Harmonized as EN 61360-4:2005 (not modified).
IEC 61649:2008 NOTE  Harmonized as EN 61649:2008 (not modified).
IEC 61703 NOTE  Harmonized as EN 61703.
IEC 62308 NOTE  Harmonized as EN 62308.
ISO 10303-11:1994 NOTE  Harmonized as EN ISO 10303-11:1995 (not modified).
ISO 10303-31 NOTE  Harmonized as EN ISO 10303-31.
__________
- 3 - EN 61709:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-191 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 191: Dependability and quality of
service
IEC 60605-6 - Equipment reliability testing - - -
Part 6: Tests for the validity and estimation of
the constant failure rate and constant failure
intensity
IEC 60721-3-3 - Classification of environmental conditions - EN 60721-3-3 -
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 3: Stationary use at weatherprotected
locations
IEC 60721-3-4 - Classification of environmental conditions - EN 60721-3-4 -
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 4: Stationary use at non-
weatherprotected locations
IEC 60721-3-5 - Classification of environmental conditions - EN 60721-3-5 -
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 5: Ground vehicle installations

IEC 60721-3-7 - Classification of environmental conditions - EN 60721-3-7 -
Part 3: Classification of groups of
environmental parameters and
their severities -
Section 7: Portable and non-stationary use

IEC 61709 ®
Edition 2.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric components – Reliability – Reference conditions for failure rates and
stress models for conversion
Composants électriques – Fiabilité – Conditions de référence pour les taux
de défaillance et modèles de contraintes pour la conversion

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 31.020 ISBN 978-2-88912-551-7

– 2 – 61709 © IEC:2011
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and symbols . 10
3.1 Terms and definitons . 10
3.2 Symbols . 12
4 Context and conditions . 13
4.1 Failure modes . 13
4.2 Operating profile considerations . 14
4.3 Storage conditions . 14
4.4 Environmental conditions . 14
5 Generic reference conditions and stress models . 16
5.1 Recommended generic reference conditions . 16
5.2 Generic stress models . 17
5.2.1 General . 17
5.2.2 Stress factor for voltage dependence, π . 18
U
5.2.3 Stress factor for current dependence, π . 18
I
5.2.4 Stress factor for temperature dependence, π . 18
T
5.2.5 Environmental application factor, π . 20
E
5.2.6 Other factors of influence . 21
6 Specific reference conditions and stress models. 21
6.1 Integrated semiconductor circuits . 21
6.1.1 Reference conditions . 21
6.1.2 Stress factors . 23
6.2 Discrete semiconductors . 27
6.2.1 Reference conditions . 27
6.2.2 Stress factors . 28
6.3 Optoelectronic components . 32
6.3.1 Reference conditions . 32
6.3.2 Stress factors . 34
6.4 Capacitors . 38
6.4.1 Reference conditions . 38
6.4.2 Stress factors . 38
6.5 Resistors and resistor networks . 41
6.5.1 Reference conditions . 41
6.5.2 Stress factors . 42
6.6 Inductors, transformers and coils . 43
6.6.1 Reference conditions . 43
6.6.2 Stress factors . 43
6.7 Microwave devices . 44
6.7.1 Reference conditions . 44
6.7.2 Stress factors . 45
6.8 Other passive components . 45
6.8.1 Reference conditions . 45

61709 © IEC:2011 – 3 –
6.8.2 Stress factors . 45
6.9 Electrical connections. 45
6.9.1 Reference conditions . 45
6.9.2 Stress factors . 46
6.10 Connectors and sockets . 46
6.10.1 Reference conditions . 46
6.10.2 Stress factors . 46
6.11 Relays . 46
6.11.1 Reference conditions . 46
6.11.2 Stress factors . 47
6.12 Switches and push-buttons . 49
6.12.1 Reference conditions . 49
6.12.2 Stress factors . 50
6.13 Signal and pilot lamps .
...