IEC 61076-3-126:2023

IEC 61076-3-126 ®
Edition 1.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electrical and electronic equipment – Product requirements –
Part 3-126: Rectangular connectors – Detail specification for 5-way power
connectors for industrial environments with push-pull locking

Connecteurs pour équipements électriques et électroniques – Exigences de
produit –
Partie 3-126: Connecteurs rectangulaires – Spécification particulière pour les
connecteurs de puissance 5 voies destinés aux environnements industriels avec
verrouillage de type pousser-tirer

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez
webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un
La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour
en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.
comité d’études, …). Elle donne aussi des informations sur les
projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.

Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC Products & Services Portal - products.iec.ch

IEC 61076-3-126 ®
Edition 1.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electrical and electronic equipment – Product requirements –

Part 3-126: Rectangular connectors – Detail specification for 5-way power

connectors for industrial environments with push-pull locking

Connecteurs pour équipements électriques et électroniques – Exigences de

produit –
Partie 3-126: Connecteurs rectangulaires – Spécification particulière pour les

connecteurs de puissance 5 voies destinés aux environnements industriels avec

verrouillage de type pousser-tirer

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.10 ISBN 978-2-8322-6348-8

– 2 – IEC 61076-3-126:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 12
4 Technical information . 12
4.1 Systems of levels . 12
4.1.1 Performance levels . 12
4.1.2 Compatibility levels, according to IEC 61076-1:2006. 12
4.2 Classification into climatic categories . 12
4.3 Clearance and creepage distances . 12
4.4 Current-carrying capacity . 13
4.5 Marking . 13
5 Dimensional information . 13
5.1 Common features. 13
5.2 Reference system . 13
5.3 Engagement (mating) information . 13
5.3.1 Engaging (mating) direction . 13
5.3.2 Perpendicular to the engaging (mating) direction . 14
5.3.3 Inclination . 14
5.4 Fixed connectors . 14
5.4.1 Dimensions . 14
5.4.2 Electrical terminations . 17
5.5 Free connectors . 17
5.5.1 Dimensions . 17
5.5.2 Electrical terminations . 19
5.6 Accessories . 20
5.7 Mounting information for connectors . 20
5.8 Gauges . 20
5.8.1 Sizing gauges and retention force gauges . 20
5.8.2 Mechanical function, engaging/separating/insertion/withdrawal force
gauges . 21
5.8.3 Probes . 21
5.8.4 Contact resistance gauge . 21
5.8.5 Test panel (for voltage proof test) . 21
5.8.6 Test panel (for EMC/crosstalk, etc.) . 21
6 Characteristics . 21
6.1 General . 21
6.2 Pin assignment . 22
6.3 Classification into climatic categories . 22
6.4 Electrical characteristics . 22
6.4.1 Creepage and clearance distances . 22
6.4.2 Voltage proof . 22
6.4.3 Current-carrying capacity . 23
6.4.4 Contact and shield resistance . 23
6.4.5 Insulation resistance . 24

6.4.6 Impedance . 24
6.4.7 Transmission characteristics . 24
6.5 Mechanical characteristics . 24
6.5.1 Mechanical operation . 24
6.5.2 Effectiveness of connector coupling devices . 24
6.5.3 Engaging and separating forces (or insertion and withdrawal forces) . 25
6.5.4 Contact retention in insert . 25
6.5.5 Polarizing and coding method . 25
6.6 Other characteristics . 25
6.6.1 Vibration (sinusoidal) . 25
6.6.2 Shock . 26
6.6.3 Degree of protection provided by enclosures (IP-code) . 27
6.6.4 Screen and shielding properties . 27
6.6.5 Static load test . 27
6.7 Environmental aspects . 27
6.7.1 Marking of insulation material (plastics) . 27
6.7.2 Design/use of material . 27
7 Test schedule . 27
7.1 General . 27
7.1.1 Overview . 27
7.1.2 Climatic category . 27
7.1.3 Creepage and clearance distances . 28
7.1.4 Arrangement for contact resistance measurement . 28
7.1.5 Arrangement for dynamic stress tests . 28
7.1.6 Arrangement for testing static load, axial . 29
7.1.7 Wiring of specimens . 29
7.2 Test schedules . 29
7.2.1 Basic (minimum) test schedule (see Table 11) . 29
7.2.2 Full test schedule . 30
7.3 Test procedures and measuring methods . 40
7.4 Pre-conditioning . 40
7.5 Wiring and mounting of specimens . 41
7.5.1 Wiring . 41
7.5.2 Mounting . 41
Bibliography . 42

Figure 1 – View showing mating direction . 13
Figure 2 – Fixed connector with male contacts . 15
Figure 3 – Free connector with female contacts . 18
Figure 4 – Mounting information – panel cut-out outline . 20
Figure 5 – Gauge dimensions . 21
Figure 6 – Vibration and shock test arrangement . 26
Figure 7 – Contact resistance arrangement . 28

Table 1 – Climatic category. 12
Table 2 – Dimensions of fixed connector . 16
Table 3 – Dimensions of free connector . 19

– 4 – IEC 61076-3-126:2023 © IEC 2023
Table 4 – Mounting dimensions . 20
Table 5 – Gauge dimensions. 21
Table 6 – Ratings of connectors . 22
Table 7 – Rated impulse voltage – Pollution degree . 23
Table 8 – Voltage proof . 23
Table 9 – Number of mechanical operations . 24
Table 10 – Total insertion force . 25
Table 11 – Basic tests . 29
Table 12 – Number of test specimens and contacts . 30
Table 13 – Test group P . 31
Table 14 – Test group AP . 31
Table 15 – Test group BP . 34
Table 16 – Test group CP . 35
Table 17 – Test group DP . 36
Table 18 – Test group EP . 37
Table 19 – Test group FP . 38
Table 20 – Test group GP . 39
Table 21 – Test group JP . 40
Table 22 – Test group KP . 40

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-126: Rectangular connectors –
Detail specification for 5-way power connectors
for industrial environments with push-pull 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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.
IEC 61076-3-126 has been prepared by subcommittee 48B: Electrical connectors, of IEC
technical committee 48: Electrical connectors and mechanical structures for electrical and
electronic equipment. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
48B/3007/FDIS 48B/3017/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 6 – IEC 61076-3-126:2023 © IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 61076 series, published under the general title Connectors for
electrical and electronic equipment – Product requirements, can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of
existingstandards in this series will be updated at the time of the next edition.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
IEC SC 48B – Electrical connectors IEC 61076-3-126
Ed.1
Specification available from:
IEC General secretariat
or from the addresses shown on the inside cover.
Detail specification in accordance with IEC 61076-1
Rectangular
connectors
Detail specification
for power
connectors for
industrial
environments with
push-pull locking
Male and female
connectors
Male and female
contacts
Rewirable –
Non-rewirable
Free cable
connectors
Straight and right
angle connectors
Fixed connectors
Flange mounting
Single hole
mounting
– 8 – IEC 61076-3-126:2023 © IEC 2023
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-126: Rectangular connectors –
Detail specification for 5-way power connectors
for industrial environments with push-pull locking

1 Scope
This document covers 5-pole rectangular connectors for electric power supply up to 16 A per
pole. These connectors consist of fixed and free connectors, both either rewirable or non-
rewirable. This document employs the general function principles of the push-pull connector
housing system described in IEC 61076-3-117 with IP65/IP67 degree of protection according
to IEC 60529 for harsh applications.
Male connectors have pin contacts with square cross-section with 1 mm side. Connectors
according to this document are without breaking capacity COC according to IEC 61984,
therefore they are not intended to be engaged or disengaged in normal use when live or under
load.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60050-581:2008, International Electrotechnical Vocabulary (IEV) – Part 581:
Electromechanical components for electronic equipment
IEC 60068-1, Environmental testing – Part 1: General and guidance
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12 h +
12 h cycle)
IEC 60352-1, Solderless connections – Part 1: Wrapped connections – General requirements,
test methods and practical guidance
IEC 60352-2, Solderless connections – Part 2: Crimped connections – General requirements,
test methods and practical guidance
IEC 60352-3, Solderless connections – Part 3: Accessible insulation displacement (ID)
connections – General requirements, test methods and practical guidance
IEC 60352-4, Solderless connections – Part 4: Non-accessible insulation displacement (ID)
connections – General requirements, test methods and practical guidance
IEC 60352-5, Solderless connections – Part 5: Press-in connections – General requirements,
test methods and practical guidance
IEC 60352-6, Solderless connections – Part 6: Insulation piercing connections – General
requirements, test methods and practical guidance

IEC 60352-7, Solderless connections – Part 7: Spring clamp connections – General
requirements, test methods and practical guidance
IEC 60352-8, Solderless connections – Part 8: Compression mount connections – General
requirements, test methods and practical guidance
IEC 60512-1-1, Connectors for electronic equipment – Tests and measurements – Part 1-1:
General examination – Test 1a: Visual examination
IEC 60512-1-2:2002, Connectors for electronic equipment – Tests and measurements –
Part 1-2: General examination – Test 1b: Examination of dimension and mass
IEC 60512-2-1:2002, Connectors for electronic equipment – Tests and measurements –
Part 2-1: Electrical continuity and contact resistance tests – Test 2a: Contact resistance –
Millivolt level method
IEC 60512-2-2, Connectors for electronic equipment – Tests and measurements – Part 2-2:
Electrical continuity and contact resistance tests – Test 2b: Contact resistance – Specified test
current method
IEC 60512-2-5, Connectors for electronic equipment – Tests and measurements – Part 2-5:
Electrical continuity and contact resistance tests – Test 2e: Contact disturbance
IEC 60512-2-6, Connectors for electronic equipment – Tests and measurements – Part 2-6:
Electrical continuity and contact resistance tests – Test 2f: Housing (shell) electrical continuity
IEC 60512-3-1:2002, Connectors for electronic equipment – Tests and measurements –
Part 3-1: Insulation tests – Test 3a: Insulation resistance
IEC 60512-4-1:2003, Connectors for electronic equipment – Tests and measurements –
Part 4-1: Voltage stress tests – Test 4a: Voltage proof
IEC 60512-5-2:2002, Connectors for electronic equipment – Tests and measurements –
Part 5-2: Current-carrying capacity tests – Test 5b: Current-temperature derating
IEC 60512-6-1, Connectors for electronic equipment – Tests and measurements –
Part 6-1: Dynamic stress tests – Test 6a: Acceleration, steady state
IEC 60512-6-2, Connectors for electronic equipment – Tests and measurements –
Part 6-2: Dynamic stress tests – Test 6b: Bump
IEC 60512-6-3:2002, Connectors for electronic equipment – Tests and measurements –
Part 6-3: Dynamic stress tests – Test 6c: Shock
IEC 60512-6-4:2002, Connectors for electronic equipment – Tests and measurements –
Part 6-4: Dynamic stress tests – Test 6d: Vibration (sinusoidal)
IEC 60512-6-5, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 6: Dynamic stress tests – Section 5: Test 6e:
Random vibration
IEC 60512-8-1:2010, Connectors for electronic equipment – Tests and measurements –
Part 8-1: Static load tests (fixed connectors) – Test 8a: Static load, transverse
IEC 60512-8-2:2011, Connectors for electronic equipment – Tests and measurements –
Part 8-2: Static load tests (fixed connectors) – Test 8b: Static load, axial

– 10 – IEC 61076-3-126:2023 © IEC 2023
IEC 60512-9-1:2010, Connectors for electronic equipment – Tests and measurements –
Part 9-1: Endurance tests – Test 9a: Mechanical operation
IEC 60512-9-2, Connectors for electronic equipment – Tests and measurements –
Part 9-2: Endurance tests – Test 9b: Electrical load and temperature
IEC 60512-11-1, Connectors for electrical and electronic equipment – Tests and measurements
– Part 11-1: Climatic tests – Test 11a: Climatic sequence
IEC 60512-11-3, Connectors for electronic equipment – Tests and measurements –
Part 11-3: Climatic tests – Test 11c: Damp heat, steady state
IEC 60512-11-4, Connectors for electronic equipment – Tests and measurements –
Part 11-4: Climatic tests – Test 11d: Rapid change of temperature
IEC 60512-11-9:2002, Connectors for electronic equipment – Tests and measurements –
Part 11-9: Climatic tests – Test 11i: Dry heat
IEC 60512-11-10, Connectors for electronic equipment – Tests and measurements –
Part 11-10: Climatic tests – Test 11j: Cold
IEC 60512-11-12, Connectors for electronic equipment – Tests and measurements –
Part 11-12: Climatic tests – Test 11m: Damp heat, cyclic
IEC 60512-12-4, Connectors for electronic equipment – Tests and measurements – Part 12-4:
Soldering tests – Test 12d: Resistance to soldering heat, solder bath method
IEC 60512-12-5, Connectors for electronic equipment – Tests and measurements – Part 12-5:
Soldering tests – Test 12e: Resistance to soldering heat, soldering iron method
IEC 60512-13-1:2006, Connectors for electronic equipment – Tests and measurements –
Part 13-1: Mechanical operation tests – Test 13a: Engaging and separating forces
IEC 60512-13-2, Connectors for electronic equipment – Tests and measurements – Part 13-2:
Mechanical operation tests – Test 13b: Insertion and withdrawal forces
IEC 60512-13-5:2006, Connectors for electronic equipment – Tests and measurements –
Part 13-5: Mechanical operation tests – Test 13e: Polarizing and keying method
IEC 60512-14-7, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 14: Sealing tests – Section 7: Test 14g: Impacting
water
IEC 60512-15-1:2008, Connectors for electronic equipment – Tests and measurements –
Part 15-1: Connector tests (mechanical) – Test 15a: Contact retention in insert
IEC 60512-15-6:2008, Connectors for electronic equipment – Tests and measurements –
Part 15-6: Connector tests (mechanical) – Test 15f: Effectiveness of connector coupling devices
IEC 60512-16-5, Connectors for electronic equipment – Tests and measurements – Part 16-5:
Mechanical tests on contacts and terminations – Test 16e: Gauge retention force (resilient
contacts)
IEC 60512-17-3:2010, Connectors for electronic equipment – Tests and measurements –
Part 17-3: Cable clamping tests – Test 17c: Cable clamp resistance to cable pull (tensile)

IEC 60512-17-4:2010, Connectors for electronic equipment – Tests and measurements –
Part 17-4: Cable clamping tests – Test 17d: Cable clamp resistance to cable torsion
IEC 60512-19-3, Electromechanical components for electronic equipment – Basic testing
procedures and measuring methods – Part 19: Chemical resistance tests – Section 3: Test 19c
– Fluid resistance
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60664-1:2020, Insulation coordination for equipment within low-voltage supply systems –
Part 1: Principles, requirements and tests
IEC 60998-2-1:2002, 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 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 60999-2, Connecting devices – Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units – Part 2: Particular requirements for clamping
2 2
units for conductors above 35 mm up to 300 mm (included)
IEC 61076-1:2006, Connectors for electronic equipment – Product requirements –
Part 1: Generic specification
IEC 61076-1:2006/AMD1:2019
IEC 61076-3:2008, Connectors for electronic equipment – Product requirements –
Part 3: Rectangular connectors – Sectional specification
IEC 61760-3:2021, Surface mounting technology – Part 3: Standard method for the
specification of components for through-hole reflow (THR) soldering
IEC 61984:2008, Connectors – Safety requirements and tests
IEC 62197-1, Connectors for electronic equipment – Quality assessment requirements –
Part 1: Generic specification
IEC 62430:2019, Environmentally conscious design (ECD) – Principles, requirements and
guidance
IEC GUIDE 109, Environmental aspects – Inclusion in electrotechnical product standards
ISO 128-3:2022, Technical product documentation (TPD) – General principles of representation
– Part 3: Views, sections and cuts
ISO 11469:2016, Plastics – Generic identification and marking of plastics products
ISO 14405 (all parts): Geometrical product specifications (GPS) – Dimensional tolerancing
ISO 21920-1: 2021, Geometrical product specifications (GPS) – Surface texture: Profile –
Part 1: Indication of surface texture

– 12 – IEC 61076-3-126:2023 © IEC 2023
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-581 as well as
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
protective conductor
PE
conductor provided for purposes of safety, for example protection against electric shock
Note 1 to entry: In an electrical installation, the conductor identified PE is normally also considered as protective
earthing conductor.
3.2
functional earthing
functional grounding, US
FE
earthing for purposes other than electrical safety
[SOURCE: IEC 60050-195:2021, 195-01-13]
4 Technical information
4.1 Systems of levels
4.1.1 Performance levels
See Table 9.
4.1.2 Compatibility levels, according to IEC 61076-1:2006
Connectors according to this document are deemed to be intermateable.
4.2 Classification into climatic categories
Table 1 shows the climatic category.
Table 1 – Climatic category
Category temperature Damp heat steady state
Climatic Relative
Lower Upper Temperature Days
category humidity
°C °C °C %
25/070/21 −25 +70 40 93 21
4.3 Clearance and creepage distances
Creepage and clearance distances shall meet the requirements given in 6.4.1.

4.4 Current-carrying capacity
See 6.4.3.
4.5 Marking
The marking of the connector and the package shall be in accordance with 2.7 of
IEC 61076-1:2006.
5 Dimensional information
5.1 Common features
Connectors meant to comply with IP ratings per IEC 60529 shall be appropriately mated and
sealed in order to meet the requirements detailed in the test schedules in 7.2.
5.2 Reference system
Coordination dimensions are dimensions without tolerances which indicate the boundary or
centre-line references in order to allow arrangement.
Dimensions are given in millimetres, drawings are shown in first angle projection according
to ISO 128-3. The shape of connectors may deviate from those shapes given in the following
figures as long as the specified dimensions are not influenced.
5.3 Engagement (mating) information
5.3.1 Engaging (mating) direction
5.3.1.1 General
An arrow in Figure 1 indicates the mating direction.

Figure 1 – View showing mating direction

– 14 – IEC 61076-3-126:2023 © IEC 2023
5.3.1.2 Contact levels and sequencing
For all interfaces, the contact sequence during the connection process shall be:
– Functional Earth (if any);
– Power contacts.
During disconnection the order shall be reversed.
5.3.2 Perpendicular to the engaging (mating) direction
Not applicable.
5.3.3 Inclination
Not applicable.
5.4 Fixed connectors
5.4.1 Dimensions
Figure 2 shows a fixed connector with male contacts and Table 2 shows the related dimensions.

Figure 2 – Fixed connector with male contacts

– 16 – IEC 61076-3-126:2023 © IEC 2023
Table 2 – Dimensions of fixed connector
Dimensions in millimetres
Letter Minimum Nominal Maximum
B1 19,9 20 20,1
B2 28,7 28,8 28,9
B3 31,05 31,2 31,35
B4 32,15 32,2 32,25
B5 34,1 34,2 34,3
B6 R 2,75 R 2,8 R 2,85
B7 R 1,93 R 2 R 2,07
B8 29° 30° 31°
B9 - 3,6 1 -
B10 12,2 12,35 12,5
B11 8,25 8,3 8,35
B12 7,44 7,5 7,56
B13 4,4 4,5 4,6
B14 8,05 8,15 8,25
B15 18,15 18,2 18,25
B16 21,45 21,5 21,55
B17 0,6 0,65 0,8
B18 0,55 0,6 0,65
B19 1,85 1,9 1,95
B20 1,9 2 2,1
B21 R 4,9 R 5 R 5,1
B22 R 0,3 R 0,4 R0,5
B23 14° 15° 16°
B24 1,4 2,4 2,6
B25 0,95 1 1,1
B26 2,73 2,8 2,87
B27 0,95 1 1,05
B28 0,40 0,5 0,55
B29 2,04 2,14 2,24
B30 0,95 1 1,05
B31 2,64 2,74 2,99
B32 - 5,08 1 -
B33 R 2,98 R 3,08 R 3,38
B34 5,95 6 6,2
B35 2,95 3 3,05
B36 2,1 2,2 2,35
B37 0,45 0,55 0,65
B38 32,1 32,25 32,4
B39 13,9 14 14,1
B40 32,9 33 33,1
B41 21,65 21,85 22,05
B42 3,4 3,5 3,6
B43 1,25 - -
NOTE Theoretically precise dimension.

5.4.2 Electrical terminations
The contact terminations shall be of any type (solder, solderless, screw-type or screwless-type).
Solderless terminations shall be in accordance with the relevant part of the IEC 60352 series.
Soldered terminations shall be in accordance with IEC 61760-3.
Screw-type or screwless-type terminations shall be in accordance with IEC 60999-1.
5.5 Free connectors
5.5.1 Dimensions
Figure 3 shows a free connector with female contacts and Table 3 shows the related
dimensions.
– 18 – IEC 61076-3-126:2023 © IEC 2023

Figure 3 – Free connector with female contacts

Table 3 – Dimensions of free connector
Dimensions in millimetres
Letter Minimum Nominal Maximum
A1 35,95 36,2 36,45
A2 31,89 32,06 32,09
A3 21,7 - -
A4 20,45 - -
A5 - - 19,35
A6 29,45 - -
A7 31,45 - -
A8 34,4 34,5 34,6
A9 29° 30° 31°
A10 - 3,6 -
A11 R 3,07 R 3,1 R 3,3
A12 - - 26,8
A13 17,89 18,06 18,09
A14 23 23,2 23,4
A15 4,6 5,1 5,6
A16 2,15 2,25 2,45
A17 8,26 8,33 8,38
A18 1,48 1,53 1,58
A19 2,93 3 3,1
A20 0.95 1 1,1
A21 0,57 0,6 0.8
A22 2,5 2,6 2,7
A23 0,63 0,68 0,73
A24 5,73 5,83 5,88
A25 1,95 2 2,05
A26 2,89 2,92 2,95
A27 R 2,78 R 2,93 R 3,03
A28 2,1 2,52 2,57
A29 - 5,08 -
A30 120° 125 130°
NOTE Theoretically precise dimension.

5.5.2 Electrical terminations
The contact terminations shall be of the following types: screw, crimp, insulation displacement,
press-in, insulation piercing, spring clamp, or solder.
Solder terminations shall be in accordance with the relevant standard IEC 61760-3.
Solderless terminations shall be in accordance with the relevant part of the IEC 60352 series.
Screw-type or screwless-type terminations shall be in accordance with IEC 60999-1.

– 20 – IEC 61076-3-126:2023 © IEC 2023
5.6 Accessories
Not applicable.
5.7 Mounting information for connectors
Figure 4 shows a panel cut out for the fixed connector and Table 4 shows the related
dimensions.
Figure 4 – Mounting information – panel cut-out outline
Table 4 – dimensions
Mounting
Dimensions in millimetres
Letter Minimum Nominal Maximum
C1 22,7 22,8 22,9
C2 32,9 33 33,1
C3 33,1 33,2 33,3
C4 13,9 14 14,1
C5 - M3 -
C6 - - 1,25
5.8 Gauges
5.8.1 Sizing gauges and retention force gauges
Material: tool steel, hardened.
= Surface roughness according to ISO 21920-1:2021: Ra = 0,25 µm, Ra = 0,15 µm
max min
Surface clean and free of grease.
Figure 5 shows gauge dimensions.

Figure 5 – Gauge dimensions
Table 5 shows gauge dimensions.
Table 5 – Gauge dimensions
Gauge Mass Application a l min Nom pin ø
g mm mm mm
+0, 01
P51 - Sizing 10
1,03
1,0
Retention 0
P52 25 10
0,97
−0,01
force
5.8.2 Mechanical function, engaging/separating/insertion/withdrawal force gauges
Not applicable.
5.8.3 Probes
Not applicable.
5.8.4 Contact resistance gauge
Not applicable.
5.8.5 Test panel (for voltage proof test)
For all styles of fixed connectors, the panel cut-out shall be designed according to the drawings
in 5.
...