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

IEC 61076-3-126:2023-01(en-fr)

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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




Warning! Make sure that you obtained this publication from an authorized distributor.

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 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

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IEC 61076-3-126:2023 © IEC 2023 – 3 –
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

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– 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

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IEC 61076-3-126:2023 © IEC 2023 – 5 –
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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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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
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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
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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.

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– 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.

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IEC 61076-3-126:2023 © IEC 2023 – 7 –
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

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– 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

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IEC 61076-3-126:2023 © IEC 2023 – 9 –
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
...