SIST EN IEC 63171:2025

SLOVENSKI STANDARD
01-julij-2025
Nadomešča:
SIST EN IEC 63171:2021
Konektorji za električno in elektronsko opremo - Zaslonjeni ali nezaslonjeni prosti
in pritrjeni konektorji za podatkovne prenose po eni simetrični parici s tokovno
zmogljivostjo - Splošne zahteve in preskusi (IEC 63171:2025)
Connectors for electrical and electronic equipment - Shielded or unshielded free and
fixed connectors for balanced single-pair data transmission with current-carrying capacity
- General requirements and tests (IEC 63171:2025)
Steckverbinder für elektrische und elektronische Geräte - Geschirmte oder ungeschirmte
freie und feste Steckverbinder für symmetrische einpaarige Datenübertragung mit
Stromtragfähigkeit - Allgemeine Anforderungen und Prüfungen (IEC 63171:2025)
Connecteurs pour équipements électriques et électroniques - Fiches et embases
écrantées ou non écrantées pour transmission de données sur une seule paire
symétrique avec courant admissible - Exigences générales et essais (IEC 63171:2025)
Ta slovenski standard je istoveten z: EN IEC 63171:2025
ICS:
31.220.10 Vtiči in vtičnice, konektorji Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63171

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2025
ICS 31.220.10 Supersedes EN IEC 63171:2021
English Version
Connectors for electrical and electronic equipment - Shielded or
unshielded free and fixed connectors for balanced single-pair
data transmission with current-carrying capacity - General
requirements and tests
(IEC 63171:2025)
Connecteurs pour équipements électriques et électroniques Steckverbinder für elektrische und elektronische Geräte -
- Fiches et embases écrantées ou non écrantées pour Geschirmte oder ungeschirmte freie und feste
transmission de données sur une seule paire symétrique Steckverbinder für symmetrische einpaarige
avec courant admissible - Exigences générales et essais Datenübertragung mit Stromtragfähigkeit - Allgemeine
(IEC 63171:2025) Anforderungen und Prüfungen
(IEC 63171:2025)
This European Standard was approved by CENELEC on 2025-05-19. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63171:2025 E
European foreword
The text of document 48B/3150/FDIS, future edition 2 of IEC 63171, prepared by SC 48B "Electrical
connectors" of IEC/TC 48 "Electrical connectors and mechanical structures for electrical and electronic
equipment" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-06-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-06-30
document have to be withdrawn
This document supersedes EN IEC 63171:2021 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63171:2025 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 standard indicated:
IEC 60068-2-61:1991 NOTE Approved as EN 60068-2-61:1993 (not modified)
IEC 60352 series NOTE Approved as EN IEC 60352 series
IEC 60603-7 series NOTE Approved as EN 60603-7 series
IEC 61076-2-101 NOTE Approved as EN IEC 61076-2-101
IEC 61076-2 series NOTE Approved as EN IEC 61076-2 series
IEC 61076-2-104 NOTE Approved as EN 61076-2-104
IEC 61076-3:2008 NOTE Approved as EN 61076-3:2008 (not modified)
IEC 63171-1 NOTE Approved as EN IEC 63171-1
IEC 63171-5 NOTE Approved as EN IEC 63171-5
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-581 - International Electrotechnical Vocabulary - - -
Part 581: Electromechanical components
for electronic equipment
IEC 60068-1 2013 Environmental testing - Part 1: General EN 60068-1 2014
and guidance
IEC 60068-2-38 - Environmental testing - Part 2-38: Tests - EN IEC 60068-2-38 -
Test Z/AD: Composite
temperature/humidity cyclic test
IEC 60512-1 - Connectors for electrical and electronic EN IEC 60512-1 -
equipment - Tests and measurements -
Part 1: Generic specification
IEC 60512-1-1 - Connectors for electronic equipment - EN 60512-1-1 -
Tests and measurements - Part 1-1:
General examination - Test 1a: Visual
examination
IEC 60512-1-2 - Connectors for electronic equipment - EN 60512-1-2 -
Tests and measurements - Part 1-2:
General examination - Test 1b:
Examination of dimension and mass
IEC 60512-2-1 - Connectors for electronic equipment - EN 60512-2-1 -
Tests and measurements - Part 2-1:
Electrical continuity and contact resistance
tests - Test 2a: Contact resistance -
Millivolt level method
IEC 60512-2-5 - Connectors for electronic equipment - EN 60512-2-5 -
Tests and measurements - Part 2-5:
Electrical continuity and contact resistance
tests - Test 2e: Contact disturbance
IEC 60512-3-1 - Connectors for electronic equipment - EN 60512-3-1 -
Tests and measurements - Part 3-1:
Insulation tests - Test 3a: Insulation
resistance
Publication Year Title EN/HD Year
IEC 60512-4-1 - Connectors for electronic equipment - EN 60512-4-1 -
Tests and measurements - Part 4-1:
Voltage stress tests - Test 4a: Voltage
proof
IEC 60512-5-2 - Connectors for electronic equipment - EN 60512-5-2 -
Tests and measurements - Part 5-2:
Current-carrying capacity tests - Test 5b:
Current-temperature derating
IEC 60512-6-3 - Connectors for electronic equipment - EN 60512-6-3 -
Tests and measurements - Part 6-3:
Dynamic stress tests - Test 6c: Shock
IEC 60512-6-4 - Connectors for electronic equipment - EN 60512-6-4 -
Tests and measurements - Part 6-4:
Dynamic stress tests - Test 6d: Vibration
(sinusoidal)
IEC 60512-9-1 - Connectors for electronic equipment - EN 60512-9-1 -
Tests and measurements - Part 9-1:
Endurance tests - Test 9a: Mechanical
operation
IEC 60512-9-2 - Connectors for electronic equipment - EN 60512-9-2 -
Tests and measurements - Part 9-2:
Endurance tests - Test 9b: Electrical load
and temperature
IEC 60512-11-1 - Connectors for electrical and electronic EN IEC 60512-11-1 -
equipment - Tests and measurements -
Part 11-1: Climatic tests - Test 11a -
Climatic sequence
IEC 60512-11-3 - Connectors for electronic equipment - EN 60512-11-3 -
Tests and measurements - Part 11-3:
Climatic tests - Test 11c: Damp heat,
steady state
IEC 60512-11-4 - Connectors for electronic equipment - EN 60512-11-4 -
Tests and measurements - Part 11-4:
Climatic tests - Test 11d: Rapid change of
temperature
IEC 60512-11-7 - Connectors for electronic equipment - EN 60512-11-7 -
Tests and measurements - Part 11-7:
Climatic tests - Test 11g: Flowing mixed
gas corrosion test
IEC 60512-11-9 - Connectors for electronic equipment - EN 60512-11-9 -
Tests and measurements - Part 11-9:
Climatic tests - Test 11i: Dry heat
IEC 60512-13-2 - Connectors for electronic equipment - EN 60512-13-2 -
Tests and measurements - Part 13-2:
Mechanical operation tests - Test 13b:
Insertion and withdrawal forces
IEC 60512-13-5 - Connectors for electronic equipment - EN 60512-13-5 -
Tests and measurements - Part 13-5:
Mechanical operation tests - Test 13e:
Polarizing and keying method
Publication Year Title EN/HD Year
IEC 60512-15-6 - Connectors for electronic equipment - EN 60512-15-6 -
Tests and measurements - Part 15-6:
Connector tests (mechanical) - Test 15f:
Effectiveness of connector coupling
devices
IEC 60512-15-7 - Connectors for electronic equipment - EN 60512-15-7 -
Tests and measurements - Part 15-7:
Connector tests (mechanical) - Test 15g:
Robustness of protective cover attachment
IEC 60512-25-9 - Connectors for electronic equipment - EN 60512-25-9 -
Tests and measurements - Part 25-9:
Signal integrity tests - Test 25i: Alien
crosstalk
IEC 60512-26-100 - Connectors for electronic equipment - EN 60512-26-100 -
Tests and measurements - Part 26-100:
Measurement setup, test and reference
arrangements and measurements for
connectors according to IEC 60603-7 -
Tests 26a to 26g
IEC 60512-28-100 - Connectors for electrical and electronic EN IEC 60512-28- -
equipment - Tests and measurements - 100
Part 28-100: Signal integrity tests up to 2
000 MHz - Tests 28a to 28g
IEC 60664-1 - Insulation coordination for equipment EN IEC 60664-1 -
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 61156 series Multicore and symmetrical pair/quad - -
cables for digital communications
IEC 61984 - Connectors - Safety requirements and EN 61984 -
tests
IEC 62153-4-9 - Metallic communication cable test methods - -
- Part 4 - 9: Electromagnetic compatibility
(EMC) - Coupling attenuation of screened
balanced cables, triaxial method
IEC 62153-4-15 - Metallic cables and other passive EN IEC 62153-4-15 -
components test methods - Part 4-15:
Electromagnetic compatibility (EMC) - Test
method for measuring transfer impedance
and screening attenuation - or coupling
attenuation with triaxial cell
ISO/IEC 11801-1 - Information technology - Generic cabling - -
for customer premises - Part 1: General
requirements
IEC 63171 ®
Edition 2.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electrical and electronic equipment – Shielded or unshielded

free and fixed connectors for balanced single-pair data transmission with

current-carrying capacity – General requirements and tests

Connecteurs pour équipements électriques et électroniques – Fiches et

embases écrantées ou non écrantées pour transmission de données sur une

seule paire symétrique avec courant admissible – Exigences générales et

essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.220.10  ISBN 978-2-8327-0337-3

– 2 – IEC 63171:2025 © IEC 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 10
4 Common features and typical connector pair . 10
5 Characteristics . 11
5.1 General . 11
5.2 Pin assignment . 11
5.3 Temperature-related tests . 11
5.3.1 Classification into climatic category . 11
5.3.2 Rapid change of temperature . 12
5.3.3 Creepage and clearance distances . 12
5.3.4 Voltage proof . 12
5.3.5 Current-temperature derating. 13
5.3.6 Interface contact resistance – initial only . 14
5.3.7 Input to output DC resistance . 14
5.3.8 Input to output DC resistance unbalance . 15
5.3.9 Insulation resistance . 15
5.4 Transmission characteristics (data transmission portion for a combined
connector) . 15
5.4.1 General . 15
5.4.2 Insertion loss . 16
5.4.3 Return loss . 16
5.4.4 Propagation delay . 17
5.4.5 Transverse conversion loss (unshielded only) . 17
5.4.6 Transverse conversion transfer loss (unshielded only) . 18
5.4.7 Transfer impedance (shielded only) . 18
5.4.8 Coupling attenuation (shielded only) . 18
5.4.9 Power sum alien (exogenous) NEXT . 19
5.4.10 Power sum alien (exogenous) FEXT . 20
5.5 Mechanical characteristics (data transmission portion for a combined
connector) . 20
5.5.1 General . 20
5.5.2 Mechanical operation . 20
5.5.3 Effectiveness of connector coupling devices . 21
5.5.4 Insertion and withdrawal forces . 22
5.5.5 Polarizing method . 22
5.5.6 Vibration . 22
5.5.7 Shock . 22
6 Tests and test schedule . 23
6.1 General . 23
6.2 Example of an arrangement for input to output DC resistance measurement . 24
6.3 Example of an arrangement for interface contact resistance measurement . 25
6.4 Arrangement for vibration test (test phase DP) . 26
6.5 Test procedures and measuring methods . 26
6.6 Preconditioning . 26

IEC 63171:2025 © IEC 2025 – 3 –
6.7 Test schedules. 26
6.7.1 General . 26
6.7.2 Basic (minimum) test schedule . 26
6.7.3 Full test schedule . 26
Annex A (informative) Current product detail specifications. 35
Annex B (informative) Relationship between connector categories and application
references of IEEE . 39
Bibliography . 40

Figure 1 – Relationship between the IEC 63171 series and their related references. 7
Figure 2 – Example of front view of fixed connector pin assignment . 11
Figure 3 – Level I connector derating curve . 13
Figure 4 – Level II connector derating curve . 14
Figure 5 – Example of an arrangement for input to output DC resistance measurement . 24
Figure 6 – Example of arrangement for contact resistance measurement . 25

Table 1 – Climatic categories – selected values . 11
Table 2 – Maximum insertion loss . 16
Table 3 – Minimum return loss . 17
Table 4 – Minimum transverse conversion loss (unshielded only) . 17
Table 5 – Minimum transverse conversion transfer loss (unshielded only). 18
Table 6 – Maximum transfer impedance (shielded only) . 18
Table 7 – Minimum coupling attenuation (shielded only) . 19
Table 8 – Minimum power sum alien near end crosstalk (PS ANEXT) . 19
Table 9 – Minimum power sum alien far end crosstalk (PS AFEXT) . 20
Table 10 – Preferred values for the number of mating cycles . 21
Table 11 – Minimum pull-out force . 21
Table 12 – Test group P . 27
Table 13 – Test group AP . 28
Table 14 – Test group BP . 30
Table 15 – Test group CP . 31
Table 16 – Test group DP . 32
Table 17 – Test group EP . 33
Table 18 – Test group FP . 33
Table 19 – Test group GP . 34
Table A.1 – Overview of current product detail specifications . 36
Table B.1 – Overview of connector categories and application references of IEEE . 39

– 4 – IEC 63171:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
SHIELDED OR UNSHIELDED FREE AND FIXED CONNECTORS FOR
BALANCED SINGLE-PAIR DATA TRANSMISSION WITH CURRENT-
CARRYING CAPACITY – GENERAL REQUIREMENTS AND TESTS

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63171 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.
This second edition cancels and replaces the first edition published in 2021. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) added requirements related to multipole and combined connectors (that are connectors
including multiple data modules of this series, or connectors including one data module and
additional signal or power contacts);
b) alignment of transmission requirements with ISO/IEC 11801-1;

IEC 63171:2025 © IEC 2025 – 5 –
c) updating and reorganising of test groups.
The text of this International Standard is based on the following documents:
Draft Report on voting
48B/3150/FDIS 48B/3157/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.
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/publications.
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, or
• revised.
– 6 – IEC 63171:2025 © IEC 2025
INTRODUCTION
This document, identified as IEC 63171, provides the general requirements and general tests
(general specification) of the whole IEC 63171 series, a set of International Standards covering
shielded or unshielded free and fixed connectors for balanced single-pair data transmission
with current-carrying capacity.
It provides the signal integrity requirements, common to the whole series.
Subsequent parts, identified as IEC 63171 followed by a dash and a progressive number
starting with 1, are the product detail specifications of this series; see Annex A, and do not
duplicate information given in this document, but list only additional requirements.
Each subsequent part is identified by a type of connector – or a set of connectors – covered
with the same number identifying the part. Some parts can describe more connector geometries
(rectangular, circular), sharing the core element and the relevant features.
Other requirements, which are necessary to describe e.g., additional power portion – if any –
of that connector, can be covered by referencing requirements provided by other relevant
documents, e.g.: IEC 61076-2 series, IEC 61076-3, or IEC 61984, as applicable.
For the complete specifications regarding a connector of this series, as well as of other series
calling up this document for the signal integrity requirements, both this product general
specification and the relevant product detail specification, see Annex A, as well as any other
sectional specification or safety requirement document referenced in the relevant subsequent
part of this series or in the relevant product detail specification, see Annex A, are therefore
required.
For the qualification of a connector of this series, all the requirements according to this general
specification and the relevant product detail specification, see Annex A, – including the
references made therein, if any, to other sectional specification or other safety-related
documents – are met.
Figure 1 shows the interrelation of the standards within this series:

IEC 63171:2025 © IEC 2025 – 7 –

Figure 1 – Relationship between the IEC 63171 series and their related references

– 8 – IEC 63171:2025 © IEC 2025
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
SHIELDED OR UNSHIELDED FREE AND FIXED CONNECTORS FOR
BALANCED SINGLE-PAIR DATA TRANSMISSION WITH CURRENT-
CARRYING CAPACITY – GENERAL REQUIREMENTS AND TESTS

1 Scope
This document covers shielded or unshielded free and fixed connectors, circular or rectangular,
for balanced single-pair data transmission, with current-carrying capacity.
It also covers the portion for balanced single-pair data transmission of combined, shielded or
unshielded, free and fixed connectors, circular or rectangular, having additional contacts for
power transmission, whose performance requirements are described in a product detail
specification, see Annex A, of the IEC 63171-X series, (type X connectors), or in a separate
document, either an IEC product detail specification, see Annex A, or manufacturer's
specification.
This document does not describe a specific mating interface. It specifies the IEC 63171 series
– or other documents referencing it – common mechanical, electrical and transmission
characteristics and environmental requirements, as well as required test specifications.
Within their own type, the shielded and unshielded connectors are interoperable for their
transmission performance and can be exchanged, although the shielded version has improved
alien crosstalk and coupling attenuation properties.
Single-pair connectors of this series can be grouped to one body of multipole connectors or
combined with other connectors, e.g., power connectors, also known as combined (data or
signal, and power) connectors.
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, International Electrotechnical Vocabulary (IEV) – Part 581: Electromechanical
components for electronic equipment
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-38, Environmental testing – Part 2-38: Tests – Test Z/AD: Composite
temperature/humidity cyclic test
IEC 60512-1, Connectors for electrical and electronic equipment – Tests and measurements –
Part 1: Generic specification
IEC 60512-1-1, Connectors for electronic equipment – Tests and measurements – Part 1-1:
General examination – Test 1a: Visual examination
IEC 60512-1-2, Connectors for electronic equipment – Tests and measurements – Part 1-2:
General examination – Test 1b: Examination of dimension and mass

IEC 63171:2025 © IEC 2025 – 9 –
IEC 60512-2-1, Connectors for electronic equipment – Tests and measurements – Part 2-1:
Electrical continuity and contact resistance tests – Test 2a: Contact resistance – Millivolt level
method
IEC 60512-2-5, Connectors for electronic equipment – Tests and measurements – Part 2-5:
Electrical continuity and contact resistance tests – Test 2e: Contact disturbance
IEC 60512-3-1, Connectors for electronic equipment – Tests and measurements – Part 3-1:
Insulation tests – Test 3a: Insulation resistance
IEC 60512-4-1, Connectors for electronic equipment – Tests and measurements – Part 4-1:
Voltage stress tests – Test 4a: Voltage proof
IEC 60512-5-2, Connectors for electronic equipment – Tests and measurements – Part 5-2:
Current-carrying capacity tests – Test 5b: Current-temperature derating
IEC 60512-6-3, Connectors for electronic equipment – Tests and measurements – Part 6-3:
Dynamic stress tests – Test 6c: Shock
IEC 60512-6-4, Connectors for electronic equipment – Tests and measurements – Part 6-4:
Dynamic stress tests – Test 6d: Vibration (sinusoidal)
IEC 60512-9-1, 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 60512-11-7, Connectors for electronic equipment – Tests and measurements – Part 11-7:
Climatic tests – Test 11g: Flowing mixed gas corrosion test
IEC 60512-11-9, Connectors for electronic equipment – Tests and measurements – Part 11-9:
Climatic tests – Test 11i: Dry heat
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, Connectors for electronic equipment – Tests and measurements – Part 13-5:
Mechanical operation tests – Test 13e: Polarizing and keying method
IEC 60512-15-6, Connectors for electronic equipment – Tests and measurements – Part 15-6:
Connector tests (mechanical) – Test 15f: Effectiveness of connector coupling devices
IEC 60512-15-7, Connectors for electronic equipment – Tests and measurements – Part 15-7:
Connector tests (mechanical) – Test 15g: Robustness of protective cover attachment

– 10 – IEC 63171:2025 © IEC 2025
IEC 60512-25-9, Connectors for electronic equipment – Tests and measurements – Part 25-9:
Signal integrity tests – Test 25i: Alien crosstalk
IEC 60512-26-100, Connectors for electronic equipment – Tests and measurements – Part 26-
100: Measurement setup, test and reference arrangements and measurements for connectors
according to IEC 60603-7 – Tests 26a to 26g
IEC 60512-28-100, Connectors for electrical and electronic equipment – Tests and
measurements – Part 28-100: Signal integrity tests up to 2 000 MHz – Tests 28a to 28g
IEC 60664-1, Insulation coordination for equipment within low-voltage supply systems – Part 1:
Principles, requirements and tests
IEC 61156 (all parts), Multicore and symmetrical pair/quad cables for digital communications
IEC 61984, Connectors – Safety requirements and tests
IEC 62153-4-9, Metallic communication cable test methods – Part 4-9: Electromagnetic
compatibility (EMC) – Coupling attenuation of screened balanced cables, triaxial method
IEC 62153-4-15, Metallic cables and other passive components test methods – Part 4-15:
Electromagnetic compatibility (EMC) – Test method for measuring transfer impedance and
screening attenuation or coupling attenuation with triaxial cell
ISO/IEC 11801-1, Information technology – Generic cabling for customer premises – Part 1:
General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-581 and
IEC 60512-1, and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
shield contact resistance
contact resistance between shield parts of fixed and free connectors
4 Common features and typical connector pair
This document provides general requirements and tests for shielded or unshielded, free and
fixed connectors for balanced single-pair data transmission with current carrying capacity.
Detail information of mating interfaces complying with this document can be found either in the
product detail specification standards IEC 63171-X (type X), see Annex A, or in the relevant
product detail specification, IEC or manufacturer's, claiming compliance with this document
regarding signal integrity requirements.
NOTE 1 More information related to M8 and M12 connectors, some of whose features are employed e.g., by type 5,
some of type 6, and type 7 connectors in this series, can be found respectively, in IEC 61076-2-104 and
IEC 61076-2-101.
IEC 63171:2025 © IEC 2025 – 11 –
NOTE 2 Further information's about single-pair cabling can be found in ISO/IEC TR 11801-9906,
ISO/IEC TR 11801-9911 and ISO/IEC 11801-1.
5 Characteristics
5.1 General
Conformance to the test schedules provided in 6.7 shall ensure the reliability of all performance
parameters, including transmission parameters, over the range of operating climatic conditions.
5.2 Pin assignment
For those specifications where pin assignment is relevant, the pin assignment shall be specified
as shown in Figure 2, unless otherwise specified. For those connector interfaces foreseeing
multiple instances of the same 2-way interface within the same connector body, the pin
assignment shall be specified for each of such individual 2-way interfaces.

Figure 2 – Example of front view of fixed connector pin assignment
5.3 Temperature-related tests
5.3.1 Classification into climatic category
The temperature range (range of operating temperature) and the assigned climatic category for
connectors complying with this document shall be compatible with ISO/IEC 11801-1
classification of a M I C E environment. Higher MICE classifications can be assigned in the
1 1 1 1
product detail specifications, see Annex A.
The upper temperature of the climatic category shall be compatible with the upper limiting
temperature (ULT) and the current-carrying capacity requirements of 5.3.5 (derating diagram in
Figure 3 or Figure 4, ULT ≥ 90 °C).
Table 1 – Climatic categories – selected values
Climatic category Lower temperature Upper temperature Damp heat, steady state
°C °C days
40/090/21 -40 90 21
NOTE As detailed in IEC 60068-1:2013, Annex A.

The category is indicated by a series of three groups of digits separated by oblique strokes
corresponding respectively to the temperature in the cold test and that in the dry heat test, and
the number of days of exposure to damp heat (steady state) the components will withstand, as
follows:
– First set: two digits denoting the minimum ambient temperature of operation (cold test).
Where the temperature requires the use of only one digit, it shall be prefixed by the figure

– 12 – IEC 63171:2025 © IEC 2025
"0" for a negative temperature or the symbol "+" for a positive temperature to make up the
two-character group.
– Second set: three digits denoting the maximum ambient temperature of operation (dry heat
test). Where the temperature requires the use of only two digits, they shall be prefixed by
the figure "0" to make up the three-digit group.
– Third set: two digits denoting the number of days of the damp heat, steady-state test (Test
CP2 in 6.7.3.5). Where the duration requires the use of only one digit, it shall be prefixed
by the figure "0" to make up the two-digit group. The figures "00" shall be used to indicate
that the component is not required to be exposed to damp heat (steady state).
In order to belong to a given category, components shall comply with the requirements of the
relevant specification when subjected to the complete set of tests prescribed for their category.
5.3.2 Rapid change of temperature
Conditions:
– IEC 60512-11-4, test 11d
– Mated connectors
– 25 cycles
– Upper and lower temperatures according to Table 1.
– T = 30 min
– Recovery time 2 h
5.3.3 Creepage and clearance distances
The permissible operating voltages depend on the application and the specified safety
requirements. Although insulation coordination is not required for safety aspects by the
connector covered in this document and in the relevant detail product specification, it is still
required for electrical functional requirements.
In general, for minimum values of clearances and creepage distances, IEC 60664-1 shall apply,
based on the assigned voltage rating for data connectors of 50 V AC and 60 V DC. For the
power portion of the connector, if any, clearances and creepage distances – within this portion
and between this portion and the data transmission portion – shall be in accordance with
IEC 60664-1 based on the declared rated voltage, rated impulse voltage and pollution degree
(see also IEC 61984).
NOTE As indicated in IEC 60664-1, IEC TR 63040 provides an alternative and more precise dimensioning
procedure for clearances equal to or less than 2 mm.
The creepage and clearance distances given in the relevant detail product specification apply
for mated connectors. The creepage and clearance distances that cover performance
requirements in IEC 60664-1 can be reduced, based on IEC TR 63040. Furthermore, in
practice, based on the conductive pattern of th
...