IEC 63171:2021

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 63171:2021 covers shielded and unshielded free and fixed connectors, circular or rectangular, for balanced single-pair data transmission, with current-carrying capacity. It specifies the IEC 63171 series; common mechanical, electrical and transmission characteristics and environmental requirements, as well as required test specifications. This document does not describe a specific mating interface. Detail specifications of mating interfaces complying with this document can be found in the family of detail specification standards IEC 63171-X (type X). Within their own type, the shielded and unshielded connectors are interoperable for their transmission performance and can be exchanged; though the shielded version has improved alien crosstalk and coupling attenuation properties

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 63171:2021 couvre les fiches et les embases écrantées et non écrantées, circulaires ou rectangulaires, pour transmission de données sur une seule paire symétrique avec courant admissible. Il spécifie les caractéristiques mécaniques, électriques et de transmission communes et les exigences environnementales, ainsi que les spécifications d’essai exigées, issues de la série de normes IEC 63171. Le présent document ne décrit pas une interface d’accouplement spécifique. Des spécifications particulières d’interfaces d’accouplement conformes au présent document peuvent être trouvées dans la famille de normes de spécifications particulières IEC 63171-X (type X). Les connecteurs écrantés ou non d’un même type sont interopérables en ce qui concerne leurs performances de transmission et peuvent être échangés. La version écrantée présente des propriétés d’affaiblissement de couplage et de diaphonie exogène améliorées.

General Information

• Status: Published
• Publication Date: 10-Mar-2021
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: SC 48B - Electrical connectors
• Drafting Committee: PT 63171 - TC 48/SC 48B/PT 63171
• Current Stage: PPUB - Publication issued
• Start Date: 11-Mar-2021
• Completion Date: 26-Mar-2021

Relations

• Revised: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 63171 ®
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
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IEC 63171 ®
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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 978-2-8322-9508-3

– 2 – IEC 63171:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Common features and typical connector pair . 9
5 Characteristics . 9
5.1 General . 9
5.2 Pin assignment . 9
5.3 Classification into climatic category . 9
5.4 Electrical characteristics . 10
5.4.1 Creepage and clearance distances . 10
5.4.2 Voltage proof . 10
5.4.3 Current-temperature derating . 11
5.4.4 Interface contact resistance – initial only . 12
5.4.5 Input to output DC resistance . 12
5.4.6 Input to output DC resistance unbalance . 13
5.4.7 Initial insulation resistance . 13
5.5 Transmission characteristics . 13
5.5.1 General . 13
5.5.2 Insertion loss . 13
5.5.3 Return loss . 14
5.5.4 Propagation delay . 14
5.5.5 Transverse conversion loss . 14
5.5.6 Transverse conversion transfer loss . 15
5.5.7 Transfer impedance (shielded only) . 15
5.5.8 Coupling attenuation . 15
5.5.9 Power sum alien (exogenous) NEXT . 16
5.5.10 Power sum alien (exogenous) FEXT . 16
5.6 Mechanical characteristics . 17
5.6.1 Mechanical operation . 17
5.6.2 Effectiveness of connector coupling devices . 18
5.6.3 Insertion and withdrawal forces . 18
5.6.4 Polarizing method . 19
5.6.5 Dynamic stress . 19
6 Tests and test schedule . 19
6.1 General . 19
6.2 Example of input to output resistance measurement arrangement . 20
6.3 Example of arrangement for contact resistance measurement . 21
6.4 Arrangement for vibration test (test phase CP) . 21
6.5 Test procedures and measuring methods . 22
6.6 Preconditioning . 22
6.7 Test schedules . 22
6.7.1 General . 22
6.7.2 Basic (minimum) test schedule . 22
6.7.3 Full test schedule . 22

Bibliography . 35

Figure 1 – Relationships between the IEC 63171 series and their related references . 6
Figure 2 – Example of front view of fixed connector pin assignment . 9
Figure 3 – Level I connector de-rating curve . 11
Figure 4 – Level II connector de-rating curve . 12
Figure 5 – Example of input to output resistance measurement arrangement . 20
Figure 6 – Example of arrangement for contact resistance measurement . 21

Table 1 – Maximum insertion loss . 14
Table 2 – Minimum return loss . 14
Table 3 – Minimum transverse conversion loss . 15
Table 4 – Minimum transverse conversion transfer loss . 15
Table 5 – Minimum coupling attenuation . 16
Table 6 – Minimum power sum alien near end crosstalk (PS ANEXT) . 16
Table 7 – Minimum power sum alien far end crosstalk (PS AFEXT) . 17
Table 8 – Preferred values for the number of mating cycles . 18
Table 9 – Minimum pull-out force . 18
Table 10 – Test group P . 23
Table 11 – Test group AP . 24
Table 12 – Test group BP . 27
Table 13 – Test group CP . 28
Table 14 – Test group DP . 30
Table 15 – Test group EP . 32
Table 16 – Test group FP . 34
Table 17 – Test group GP . 34

– 4 – IEC 63171:2021 © IEC 2021
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
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard 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.
The text of this International Standard is based on the following documents:
FDIS Report on voting
48B/2863/FDIS 48B/2866/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

– 6 – IEC 63171:2021 © IEC 2021
INTRODUCTION
The IEC 63171 series is a set of International Standards covering shielded or unshielded free
and fixed connectors for balanced single-pair data transmission with current carrying capacity.
This document, identified as IEC 63171, is the general requirements and tests part (general
specification) of 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 and
do not duplicate information given in this document, but list only additional requirements.
Each subsequent part is identified by a type of connector covered with the same number
identifying the part. Some parts can describe more than connector geometries (rectangular,
circular), sharing the core element and the relevant features.
For the complete specifications regarding a connector of this series, both this general
specification and the relevant detail specification are therefore required.
For the qualification of a connector of this series, both this general specification and the relevant
detail specification shall be met.
Figure 1 shows the interrelation of the standards:

Figure 1 – Relationships between the IEC 63171 series and their related references
NOTE IEC 63171-1 and IEC 63171-6 contain duplicate information, which is either equal to or better than the
minimum requirements of this document; such duplicate information is due to be removed in later editions.

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 and unshielded free and fixed connectors, circular or
rectangular, for balanced single-pair data transmission, with current-carrying capacity.
It specifies the IEC 63171 series' common mechanical, electrical and transmission
characteristics and environmental requirements, as well as required test specifications.
This document does not describe a specific mating interface. Detail specifications of mating
interfaces complying with this document can be found in the family of detail specification
standards IEC 63171-X (type X).
Within their own type, the shielded and unshielded connectors are interoperable for their
transmission performance and can be exchanged; though the shielded version has improved
alien crosstalk and coupling attenuation properties.
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 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 60512-2-1, 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

– 8 – IEC 63171:2021 © IEC 2021
IEC 60512-5-2, Connectors for electronic equipment – Tests and measurements – Part 5-2:
Current-carrying capacity tests – Test 5b: Current-temperature derating
IEC 60512-6-4, 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 60512-11-4, 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 60512-11-12, Connectors for electronic equipment – Tests and measurements –
Part 11-12: Climatic tests – Test 11m: Damp heat, cyclic
IEC 60512-13-2, Connectors for electronic equipment – Tests and measurements – Part 13-2:
Mechanical operation tests – Test 13b: Insertion and withdrawal forces
IEC 60512-15-6, Connectors for electronic equipment – Tests and measurements – Part 15-6:
Connector tests (mechanical) – Test 15f: Effectiveness of connector coupling devices
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 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 systems – Part 1:
Principles, requirements and tests
IEC 62153-4-9:2018/AMD1:2020, Metallic communication cable test methods – Part 4-9:
Electromagnetic compatibility (EMC) – Coupling attenuation of screened balanced cables,
triaxial method
IEC 62153-4-15, Metallic communication cable test methods – Part 4-15: Electromagnetic
compatibility (EMC) – Test method for measuring transfer impedance and screening attenuation
– or coupling attenuation with triaxial cell
IEC TR 63040:2016, Guidance on clearances and creepage distances in particular for distances
equal to or less than 2 mm – Test results of research on influencing parameters
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 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
shield contact between the fixed and free connectors
contact between shield parts of fixed and free connectors
4 Common features and typical connector pair
This document does not describe a specific mating interface. Detail specifications of mating
interfaces complying with this document can be found in the family of detail specification
standards IEC 63171-X (type X).
5 Characteristics
5.1 General
Conformance to the test schedules 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 Classification into climatic category
The temperature range and climatic category shall be compatible with ISO/IEC 11801-1
classification of an M I C E environment.
1 1 1 1
The upper temperature of the climatic category shall be compatible with the upper limiting
temperature and the current-carrying capacity requirements of 5.4.3 (derating diagram in
Figure 3 or Figure 4, ULT ≥ 90 °C).

– 10 – IEC 63171:2021 © IEC 2021
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 “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 Ca). 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 whole set of tests prescribed for their category.
5.4 Electrical characteristics
5.4.1 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 50 V AC and 60 V DC.
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
may be reduced, based on IEC TR 63040.
Furthermore, in practice, based on the conductive pattern of the printed board or the wiring
used, reductions in creepage or clearance distances are permitted.
5.4.2 Voltage proof
Conditions:
– IEC 60512-4-1, Test 4a, Method A.
– Standard atmospheric conditions.
– Mated connectors.
All variants:
– 1 000 V DC: contact to contact.
– 1 500 V AC (RMS at 50 Hz to 60 Hz) or 2 250 V DC: all contacts connected together, to
shield (if applicable).
NOTE For connector interfaces providing more than one individual 2-way shielded connector, the test is repeated
on each of these individual connectors.

5.4.3 Current-temperature derating
Conditions:
– IEC 60512-5-2, Test 5b.
– All contacts connected in series.
– Testing shall be carried out with the minimum supported wire size.
– The current-carrying capacity of connectors shall comply with the derating values given in
Figure 3 for Level I and Figure 4 for Level II.

0,5
T

NOTE 1 The maximum permissible current for a given ambient temperature (T) is: I = 3,5⋅−1

(T)
90
NOTE 2 For ambient temperatures lower than 0 °C, the maximum permissible current per conductor is 3,5 A
Figure 3 – Level I connector de-rating curve

– 12 – IEC 63171:2021 © IEC 2021

0,5
T

NOTE 1 The maximum permissible current for a given ambient temperature (T) is: .
I = 7,0⋅−1

(T)

NOTE 2 For ambient temperatures lower than 0 °C, the maximum permissible current per conductor is 7,0 A
Figure 4 – Level II connector de-rating curve
5.4.4 Interface contact resistance – initial only
Conditions:
– IEC 60512-2-1, Test 2a.
– Arrange for measurement in accordance with 6.3.
– Mated connectors.
– Measurement points: as specified in Figure 5.
– All Types: 20 mΩ maximum.
– Shielding resistance: 100 mΩ maximum (if applicable).
5.4.5 Input to output DC resistance
Conditions:
– IEC 60512-2-1, Test 2a.
– Arrange for measurement in accordance with 6.3.
– Mated connectors.
– Measurement points: as specified in Figure 5a or 5b.
– All types: 50 mΩ maximum.
5.4.6 Input to output DC resistance unbalance
Conditions:
– IEC 60512-2-1, Test 2a.
– Arrange for measurement in accordance with 6.3.
– Mated connectors.
– Measurement points: as specified in Figure 5a or 5b.
– Among all signal conductors, maximum difference.
– All Types: 25 mΩ maximum.
5.4.7 Initial insulation resistance
Conditions:
– IEC 60512-3-1, Test 3a, Method A.
– Mated connectors.
– Test voltage: 500 V DC.
– All types: 500 MΩ minimum.
5.5 Transmission characteristics
5.5.1 General
This document specifies three different performance categories:
– category A specified from 0,1 MHz to 20 MHz;
– category B specified from 0,1 MHz to 600 MHz;
– category C specified from 0,1 MHz to 1 250 MHz.
Compliance with this document, with respect to transmission characteristics, shall be
determined in accordance with specified test methods described in test group FP.
All transmission performance requirements shall apply between the reference planes specified
in IEC 60512-28-100.
All transmission performance results shall be reported as worst-case overall result after testing
all samples.
5.5.2 Insertion loss
Conditions:
– IEC 60512-28-100, test 28a.
– Mated connectors.
Requirements: see Table 1.
– 14 – IEC 63171:2021 © IEC 2021
Table 1 – Maximum insertion loss
Category Frequency Maximum insertion loss
MHz dB
A 0,1 to 20
0,02× f
B 0,1 to 600
0,02× f
C 0,1 to 1 250
0,02× f
Whenever the equation results in a value less than 0,1 dB, the requirement shall revert to
0,1 dB.
5.5.3 Return loss
Conditions:
– IEC 60512-28-100, test 28b.
– Mated connectors.
Requirements: see Table 2.
Table 2 – Minimum return loss
Category Frequency Minimum return loss
MHz dB
A 0,1 to 20 48 – 20 lg(f)
B 0,1 to 600 74 – 20 lg(f)
C 0,1 to 1 250 74 – 20 lg(f)
Whenever the equation results in a value greater than 30 dB, the requirement shall revert to
30 dB.
5.5.4 Propagation delay
Conditions:
– All types: 2,5 ns maximum.
– Propagation delay test does not need to be performed, since it is assumed that connectors
comply by design.
5.5.5 Transverse conversion loss
Conditions:
– IEC 60512-28-100, test 28f.
– Mated connectors.
Requirements: see Table 3.
Table 3 – Minimum transverse conversion loss
Category Frequency Minimum transverse conversion loss
MHz dB
A 0,1 – 20 54 – 20 lg(f)
B 0,1 – 600 68 – 20 lg(f)
C 0,1 – 1 250 74 – 20 lg(f)
Whenever the equation results in a value greater than 50 dB, the requirement shall revert to
50 dB.
5.5.6 Transverse conversion transfer loss
Conditions:
– IEC 60512-28-100, test 28g.
– Mated connectors.
Requirements: see Table 4.
Table 4 – Minimum transverse conversion transfer loss
Category Frequency Minimum transverse conversion transfer loss
MHz dB
A 0,1 – 20 54 – 20 lg(f)
B 0,1 – 600 68 – 20 lg(f)
C 0,1 – 1 250 78 – 20 lg(f)
Whenever the equation results in a value greater than 50 dB, the requirement shall revert to
50 dB.
5.5.7 Transfer impedance (shielded only)
Conditions:
– IEC 60512-26-100, test 26e.
– Mated connectors, terminated with each cable type (e.g. F/UTP, S/FTP) intended to be used
for these connectors shall not show higher magnitude of transfer impedance as given by
formula:
0,3
• ≤ 0,05 · f Ω from 0,1 MHz to 10 MHz;
• ≤ 0,01 · f Ω from 10 MHz to 80 MHz.
5.5.8 Coupling attenuation
Conditions:
– IEC 62153-4-15 for coupling attenuation and for low frequencies
IEC 62153-4-9:2018/AMD1:2020 shall be considered.
– Mated connectors, terminated with each cable construction type intended to be allowed for
a certain environment.
Requirements: see Table 5.
– 16 – IEC 63171:2021 © IEC 2021
Table 5 – Minimum coupling attenuation
Environmental description Frequency Minimum coupling attenuation
MHz dB
E1 0,1 – 1 250 105 – 20 lg(f)

NOTE Both the test method using the triaxial method and the test method using upper frequency are ffs.
Whenever the equation results in a value greater than 84 dB, the requirement shall revert to
84 dB.
5.5.9 Power sum alien (exogenous) NEXT
Conditions:
– IEC 60512-25-9, test 25i.
– 3 disturbers, A-C around 1 X ffs.
– Mated connectors.
− ANEXT
N ki
10
PS ANEXT =−10lg 10
–
K ∑

i=1

Requirements: see Table 6.
Table 6 – Minimum power sum alien near end crosstalk (PS ANEXT)
Category Frequency Minimum PS ANEXT
MHz dB
Unshielded Shielded
A 0,1 to 20 110 – 20 lg(f) 140 – 20 lg(f)
B 0,1 to 600 110 – 20 lg(f) 140 – 20 lg(f)
C 0,1 to 1 250 110 – 20 lg(f) 140 – 20 lg(f)

NOTE 1 Shielded connectors passing the requirements of transfer impedance, coupling attenuation and unbalance
attenuation meet PS ANEXT by design.
Whenever the equation results in a value greater than 84 dB, the requirement shall revert to
84 dB.
The PS ANEXT requirements are fulfilled when coupling attenuation are verified.
NOTE 2 Power sum alien (exogenous) NEXT cannot be determined by a mated connector in isolation. Connector
compliance is achieved by assessing a connector's performance when mounted in accordance with the
manufacturer's installation instructions for each mounting type assessed and in relation to all other significant
connectors in close proximity (see IEC 60512-25-9).
5.5.10 Power sum alien (exogenous) FEXT
Conditions:
– IEC 60512-25-9, test 25i.
– 3 disturbers, A-C around 1 X ffs.
– Mated connectors.
− AFEXT
ki
N

– PS AFEXT =−10lg 10
K ∑

i=1

Requirements: see Table 7
Table 7 – Minimum power sum alien far end crosstalk (PS AFEXT)
Category Frequency Minimum PS AFEXT
MHz dB
Unshielded Shielded
A 0,1 to 20 107 – 20 lg(f) 130 – 20 lg(f)
B 0,1 to 600 107 – 20 lg(f) 130 – 20 lg(f)
C 0,1 to 1 250 107 – 20 lg(f) 130 – 20 lg(f)

Whenever the equation results in a value greater than 84 dB, the requirement shall revert to
84 dB.
The PS AFEXT requirements are fulfilled when coupling attenuation are verified.
Shielded connectors passing the requirements of transfer impedance, coupling attenuation and
unbalance attenuation meet PS AFEXT by design.
NOTE Power sum alien (exogenous) NEXT cannot be determined by a mated connector in isolation. Connector
compliance is achieved by assessing a connector's performance when mounted in accordance with the
manufacturer's installation instructions for each mounting type assessed and in relation to all other significant
connectors in close proximity (see IEC 60512-25-9).
5.6 Mechanical characteristics
5.6.1 Mechanical operation
Conditions:
– IEC 60512-9-1, Test 9a.
– Standard atmospheric conditions.
– Speed: 10 mm/s maximum.
– Rest: 1 s minimum (mated and unmated).
– The number of mechanical operations specified by the manufacture depending on the style
with the mating performance level (MPL). The preferred MPL values are defined in Table 8.

– 18 – IEC 63171:2021 © IEC 2021
Table 8 – Preferred values for the number of mating cycles
Mating performance level Mating cycles
MPL20 20
MPL50 50
MPL100 100
MPL500 500
MPL750 750
MPL1000 1 000
MPL2500 2 500
MPL5000 5 000
Other types
Other mating cycles are upon agreement between manufacturer and user.

NOTE One insertion and one withdrawal = one mating cycle.
5.6.2 Effectiveness of connector coupling devices
Conditions:
– IEC 60512-15-6, Test 15f.
– Standard atmospheric conditions.
– Effectiveness of connector coupling device specified by the connector style in Table 9. The
specified pull-out force shall be applied for 60 s ± 5 s.
Table 9 – Minimum pull-out force
Connector style Minimum pull-out force
N
Latch 50
Snap-in 30
Push-pull (IP20 to IP64) 50
Push-pull (IP65 to IP67) 300
M8 or M12
Not applicable
M8 and M12 screw locking is effective by design.

5.6.3 Insertion and withdrawal forces
Conditions:
– IEC 60512-13-2, Test 13b.
– Standard atmospheric conditions.
– Speed: maximum rate of 10 mm/s.
– Locking style:
• Latch: insertion and withdrawal: 20 N maximum.
• All other styles: insertion and withdrawal: 30 N maximum.

5.6.4 Polarizing method
Conditions:
– IEC 60512-13-5, Test 13e.
– Standard atmospheric conditions.
– Engaging force: 1,5 × total insertion force, 50 N minimum.
5.6.5 Dynamic stress
Conditions:
– IEC 60512-6-4, Test 6d.
– Frequency range: 10 Hz to 500 Hz.
– Amplitude: 0,35 mm.
– Sweep rate: 1 octave/minute.
– Acceleration: 50 m/s .
– Duration: 2 h per axis, total 6 h.
– Axes: x, y, z.
– Standard atmospheric conditions.
– Connectors in mated and locked position.
6 Tests and test schedule
6.1 General
This document states the test sequence (in accordance with this document) and the number of
specimens for each test sequence.
Individual variants may be submitted to type tests for approval of those particular variants.
It is permissible to limit the number of variants tested to a selection representative of the whole
range for which approval is required (which may be less than the range covered by the detail
specification), but each feature and characteristic shall be validated against the dimensional
requirements and test sequence specified in this document.
The connector shall be prepared in a careful workmanlike manner, in accordance with current
best practice.
Unless otherwise specified, mated sets of connectors shall be tested. For contact resistance
measurements, care shall be taken to keep a particular combination of connectors together
during the complete test sequence; that is, when unmating is necessary for a certain test, the
same connectors shall be mated for subsequent tests.
Wiring of these connectors shall take into account the wire and cable diameter of the cables
defined in IEC 61156 (all parts) as applicable to the manufacturer's specification.

– 20 – IEC 63171:2021 © IEC 2021
6.2 Example of input to output resistance measurement arrangement
Dimension in millimetres
Key
A measuring point A
B termination end wired
C termination end wired
D measuring point D
a) Free connectors
Dimension in millimetres
Key
A measuring point A
B termination end wired
C measuring point C
b) Fixed and free connectors
Figure 5 – Example of input to output resistance measurement arrangement
The test shall be carried out in accordance with IEC 60512-2-1, test 2a. The input to output DC
resistance shall be measured between measuring points A and D for free connectors or A and
C for fixed and free connectors, as shown in Figure 5.

The total termination resistance is available by subtracting wire resistance and interface contact
resistance R from the resistance R or R .
contact AD AC
6.3 Example of arrangement for contact resistance measurement

Key
1 fixed connector
2 attached wires: as short as practical
3 free connector
4 contact resistance measuring points
A Fixed connector measuring point A
B Measuring point B: B1 on the contact of fixed connector, B2 on the contact of free connector
...