EN 61076-2-104:2008

SLOVENSKI STANDARD
01-november-2008
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Connectors for electronic equipment - Product requirements - Part 2-104: Detail
specification for circular connectors with M8 screw-locking or snap-locking (IEC 61076-2-
104:2008)
Steckverbinder für elektronische Einrichtungen - Produktanforderungen - Teil 2-104:
Rundsteckverbinder - Bauartspezifikation für Rundsteckverbinder M8 mit Schraub- oder
Rastverriegelung (IEC 61076-2-104:2008)
Connecteurs pour quipements lectroniques - Exigences de produit - Partie 2-104:
Specification particulire pour les connecteurs circulaires M8 vis ou encliquetage (IEC
61076-2-104:2008)
Ta slovenski standard je istoveten z: EN 61076-2-104:2008
ICS:
31.220.10 9WLþLLQYWLþQLFHNRQHNWRUML Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61076-2-104
NORME EUROPÉENNE
September 2008
EUROPÄISCHE NORM
ICS 31.220.10 Partially supersedes EN 61076-2-101:2003 + A1:2006

English version
Connectors for electronic equipment -
Product requirements -
Part 2-104: Circular connectors -
Detail specification for circular connectors
with M8 screw-locking or snap-locking
(IEC 61076-2-104:2008)
Connecteurs pour équipements Steckverbinder für elektronische
électroniques - Einrichtungen -
Exigences de produit - Produktanforderungen -
Partie 2-104: Connecteurs circulaires - Teil 2-104: Rundsteckverbinder -
Spécification particulière Bauartspezifikation
pour les connecteurs circulaires M8 für Rundsteckverbinder M8
à vis ou à encliquetage mit Schraub- oder Rastverriegelung
(CEI 61076-2-104:2008) (IEC 61076-2-104:2008)

This European Standard was approved by CENELEC on 2008-06-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61076-2-104:2008 E

Foreword
The text of document 48B/1753/CDV, future edition 1 of IEC 61076-2-104, prepared by SC 48B,
Connectors, of IEC TC 48, Electromechanical components and mechanical structures for electronic
equipment, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was
approved by CENELEC as EN 61076-2-104 on 2008-06-01.
This European Standard supersedes the following parts of EN 61076-2-101:2003 + A1:2006:
– Subclauses 2.2.3, 2.2.4 and 3.2.2;
– Tables 6, 10 and 12;
– any reference to connector type E and M8.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61076-2-104:2008 was approved by CENELEC as a European
Standard without any modification.
__________
– 3 – EN 61076-2-104:2008
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 60068-1 1988 Environmental testing -
+ corr. October 1988 Part 1: General and guidance

+ A1 1992 EN 60068-1 1994
1) 2)
IEC 60068-2-60 - Environmental testing - EN 60068-2-60 1996
Part 2: Tests - Test Ke: Flowing mixed gas
corrosion test
IEC 60352 Series Solderless connections EN 60352 Series

IEC 60512 Series Connectors for electronic equipment - Tests EN 60512 Series
and measurements
1) 2)
IEC 60512-1-100 - Connectors for electronic equipment - Tests EN 60512-1-100 2006
and measurements -
Part 1-100: General - Applicable publications

IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
A1 1999 A1 2000
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems -
Part 1: Principles, requirements and tests

1) 2)
IEC 60998-2-1 - Connecting devices for low-voltage circuits EN 60998-2-1 2004
(mod) for household and similar purposes -
Part 2-1: Particular requirements for
connecting devices as separate entities with
screw-type clamping units
IEC 60999 Series Connecting devices - Electrical copper EN 60999 Series
conductors - Safety requirements for screw-
type and screwless-type clamping units

IEC 61076-1 2006 Connectors for electronic equipment - EN 61076-1 2006
Product requirements -
Part 1: Generic specification
IEC 61076-2-001 2001 Connectors for electronic equipment - EN 61076-2-001 2001
Part 2-001: Circular connectors - Blank detail
specification
1) 2)
IEC 61984 - Connectors - Safety requirements and tests EN 61984 2001

1)
ISO 1302 - Geometrical Product Specifications (GPS) - - -
Indication of surface texture in technical
product documentation
1)
Undated reference.
2)
Valid edition at date of issue.

IEC 61076-2-104
Edition 1.0 2008-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Product requirements –
Part 2-104: Circular connectors – Detail specification for circular connectors
with M8 screw-locking or snap-locking

Connecteurs pour équipements électroniques – Exigences de produit –
Partie 2-104: Connecteurs circulaires – Spécification particulière pour les
connecteurs circulaires M8 à vis ou à encliquetage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 31.220.10 ISBN 2-8318-9670-3

– 2 – 61076-2-104 © IEC:2008
CONTENTS
FOREWORD.5
1 General information.8
1.1 Scope.8
1.2 Recommended method of termination .8
1.2.1 Number of contacts or contact cavities .8
1.3 Ratings and characteristics .8
1.4 Normative references .8
1.5 Marking .9
1.6 IEC Type designation .10
1.7 Ordering information.10
1.8 Safety aspects.11
2 Technical information .11
2.1 Terms and definitions .11
2.2 Survey of styles and variants.11
2.2.1 General .11
2.2.2 Fixed connectors .11
2.2.3 Free connectors .13
3 Dimensions .18
3.1 General .18
3.2 Interface dimensions .19
3.2.1 Pin front view A-coding.19
3.2.2 Pin front view B-Coding .20
3.3 Engagement (mating) information.21
3.4 Gauges .23
4 Characteristics .23
4.1 Climatic category.23
4.2 Electrical .23
4.2.1 Rated voltage – Rated impulse voltage – Pollution degree.23
4.2.2 Voltage proof.24
4.2.3 Current-carrying capacity.24
4.2.4 Contact resistance.24
4.2.5 Insulation resistance.24
4.3 Mechanical.24
4.3.1 IP degree of protection .24
4.3.2 Mechanical operation .25
4.3.3 Insertion and withdrawal forces .25
4.3.4 Contact retention in insert.25
4.3.5 Polarizing method.25
4.3.6 Vibration (sinusoidal).25
5 Test schedule.26
5.1 General .26
5.1.1 Arrangement for contact resistance measurements.26
5.1.2 Arrangement for dynamic stress tests (vibration) .28
5.2 Test schedule.29
5.2.1 Test group P – Preliminary .29
5.2.2 Test group AP – Dynamic/ Climatic.29

61076-2-104 © IEC:2008 – 3 –
5.2.3 Test group BP – Mechanical endurance.32
5.2.4 Test group CP – Electrical load .33
5.2.5 Test group DP – Chemical resistivity .34
5.2.6 Test group EP – Connection method tests .34
Annex A (informative) Diameter of the female connector body .35

Figure 1 – Tube insert, male contacts dip solder, mounting long version.11
Figure 2 – Tube insert, male contacts dip solder, mounting short version.12
Figure 3 – Fixed connector with wire ends, male contacts, single hole mounting.12
Figure 4 – Fixed connector with wire ends, female contacts, single hole mounting.13
Figure 5 – Rewireable connector, male contacts, straight version, with locking nut .14
Figure 6 – Rewireable connector, male contacts, right angled version, with locking nut .14
Figure 7 – Non-rewireable connector, male contacts, straight version, snap locking.15
Figure 8 – Non-rewireable connector, male contacts, straight version, with locking nut .15
Figure 9 – Non-rewireable connector, male contacts, angled version, with locking nut .15
Figure 10 – Rewireable connector, female contacts, straight version, with locking nut .16
Figure 11 – Rewireable connector, female contacts, right angled version, with locking nut.16
Figure 12 – Non-rewireable connector, female contacts, straight version, snap locking.16
Figure 13 – Non-rewireable connector, female contacts, angled version, snap locking .17
Figure 14 – Non-rewireable connector, female contacts, straight version, with locking nut .17
Figure 15 – Non-rewireable connector, female contacts, angled version with locking nut .17
Figure 16 – Pin front view A-coding .19
Figure 17 – Contact position A-Coding front view.20
Figure 18 – Pin front view B-Coding.20
Figure 19 – Contact position – B-Coding - front view.20
Figure 20 – Engagement (mating) information.21
Figure 21 – Gauge dimensions .23
Figure 22 – Contact resistance arrangement.27
Figure 23 – Dynamic stress test arrangement .28
Figure A.1 – Diameter of the female connector body, coding variant A.35
Figure A.2 – Shape of the female connector body, coding variant B.35

Table 1 – Styles of fixed connectors .11
Table 2 – Styles of free connectors.13
Table 3 – Connectors dimensions in mated and locked position.22
Table 4 – Gauges .23
Table 5 – Climatic category .23
Table 6 – Rated voltage – Rated impulse voltage – Pollution degree .24
Table 7 – Voltage proof.24
Table 8 – Number of mechanical operations .25
Table 9 – Insertion and withdrawal forces .25
Table 10 – Number of test specimens .26
Table 11 – Test group P .29
Table 12 – Test group AP .29

– 4 – 61076-2-104 © IEC:2008
Table 13 – Test group BP .32
Table 14 – Test group CP .33
Table 15 – Test group DP .34
Table 16 – Test group EP .34

61076-2-104 © IEC:2008 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-104: Circular connectors – Detail specification for circular
connectors with M8 screw-locking or snap-locking

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61076-2-104 has been prepared by subcommittee 48B:
Connectors, of IEC technical committee 48: Electromechanical components and mechanical
structures for electronic equipment.
This part of IEC 61076-2 cancels and replaces the following parts of IEC 61076-2-101:2003
(first edition of IEC 61076-2-101):
• subclauses 2.2.3, 2.2.4 and 3.2.2,
• Tables 6, 10 and 12,
• any reference to connector type E and M8.

– 6 – 61076-2-104 © IEC:2008
The text of this standard is based on the following documents:
CDV Report on voting
48B/1753/CDV 48B/1815/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61076 series, under the general title Connectors for electronic
equipment – Product requirements, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under http://webstore.iec.ch in the
data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61076-2-104 © IEC:2008 – 7 –
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-104: Circular connectors – Detail specification for circular
connectors with M8 screw-locking or snap-locking

International Electrotechnical Commission
IEC 61076-2-104
IEC SC 48B – Connectors
Specification available from: IEC General secretariat or from
the addresses shown on the inside cover.
ELECTRONIC COMPONENTS detail specification in

accordance with IEC 61076-1
Circular connectors
M8/ ∅ 8 mm 3 to 5 way
Male and female contacts
Male and female connectors
Rewireable – Non-rewireable
Free cable connectors
Straight and right angle connectors

Fixed connectors
Flange mounting
Single hole mounting
– 8 – 61076-2-104 © IEC:2008
1 General information
Throughout this detail specification, dimensions are in mm.
1.1 Scope
This detail specification describes circular connectors M8 screw-locking or with nominal
∅ 8 mm snap-locking, typically used for industrial process measurement and control. These
connectors consist of fixed and free connectors either rewireable or non-rewireable. Male
connectors have round contacts ∅ 1,0 mm.
NOTE M8 is the dimension of the thread of the screw locking mechanism of these circular connectors.
1.2 Recommended method of termination
The contact terminations shall be of the following types: screw, crimp, insulation piercing,
insulation displacement, press-in or solder.
1.2.1 Number of contacts or contact cavities
A-coding 3 and 4 contacts
B-coding 5 contacts
1.3 Ratings and characteristics
Rated voltage A-coding 3 contacts 60 V d.c. or a.c.
4 contacts 30 V d.c. or a.c.
B-coding 5 contacts  30 V d.c. or a.c.
Current rating A-coding 3 and 4 contacts 3 A
B-coding 5 contacts 3 A
Insulation resistance : 10 Ω min.
Climatic category : see 4.1 Table 5
Contact spacing : see Clause 3, dimensions
1.4 Normative references
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.
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
Amendment 1 (1992)
IEC 60068-2-60, Environmental testing – Part 2: Tests – Test Ke: Flowing mixed gas
corrosion test
IEC 60352 (all parts), Solderless connections
IEC 60512 (all parts), Connectors for electronic equipment – Tests and measurements
IEC 60512-1-100, Connectors for electronic equipment – Tests and measurements –
Part 1-100: General – Applicable publications

61076-2-104 © IEC:2008 – 9 –
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 1 (1999)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60998-2-1, Connecting devices for low-voltage circuits for household and similar
purposes – Part 2-1: Particular requirements for connecting devices as separate entities with
screw-type clamping units
IEC 60999 (all parts), Connecting devices – Electrical copper conductors – Safety
requirements for screw-type and screwless-type clamping units
IEC 61076-1:2006, Connectors for electronic equipment – Product requirements – Part 1:
Generic Specification
IEC 61076-2-001:2001, Connectors for electronic equipment – Part 2-001: Circular connectors
– Blank detail specification
IEC 61984, Connectors – Safety requirements and tests
ISO 1302, Geometrical Product Specification (GPS) – Indication of surface texture in technical
product documentation
1.5 Marking
The marking of the connector and the package shall be in accordance with 2.7 of
IEC 61076-1:2006
...