IEC 61076-3-122:2017

IEC 61076-3-122 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Connectors for electrical and electronic equipment – Product requirements –
Part 3-122: Detail specification for 8-way, shielded, free and fixed connectors for
I/O and Gigabit Ethernet applications in harsh environments

Connecteurs pour équipements électriques et électroniques – Exigences de
produit –
Partie 3-122: Spécification particulière pour les fiches et les embases écrantées
à 8 voies pour applications E/S et Ethernet Gigabit en environnements sévères

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IEC 61076-3-122 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Connectors for electrical and electronic equipment – Product requirements –

Part 3-122: Detail specification for 8-way, shielded, free and fixed connectors for

I/O and Gigabit Ethernet applications in harsh environments

Connecteurs pour équipements électriques et électroniques – Exigences de

produit –
Partie 3-122: Spécification particulière pour les fiches et les embases écrantées

à 8 voies pour applications E/S et Ethernet Gigabit en environnements sévères

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.220.10 ISBN 978-2-8322-8448-3

– 2 – IEC 61076-3-122:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Mating information . 9
4.1 General . 9
4.2 Contacts – mating conditions . 9
4.3 Fixed connector Type I . 10
4.4 Free connector Type I . 12
4.5 Fixed connector Type II . 14
4.6 Free connector Type II . 16
5 Characteristics . 17
5.1 General . 17
5.2 Pin and pair grouping assignment . 17
5.3 Classification into climatic category . 18
5.4 Electrical characteristics . 19
5.4.1 Voltage proof . 19
5.4.2 Voltage rating . 19
5.4.3 Current-temperature derating . 19
5.4.4 Initial insulation resistance . 20
5.5 Mechanical characteristics . 20
5.5.1 Mechanical operation . 20
5.5.2 Insertion and withdrawal forces . 20
5.6 Transmission performance . 21
5.6.1 General . 21
5.6.2 Insertion loss . 21
5.6.3 Return loss . 21
5.6.4 Near end cross talk . 21
5.6.5 Far end cross talk . 21
5.6.6 Transverse conversion loss . 21
5.6.7 Transfer conversion transfer loss . 21
5.6.8 Transfer impedance . 22
6 Tests and test schedule . 22
6.1 General . 22
6.2 Arrangement for contact resistance test (Figure 8) . 22
6.3 Arrangement for vibration test (test phase DP3) (Figure 9). 23
6.4 Test procedures and measuring methods . 23
6.5 Preconditioning . 24
6.6 Test schedules . 24
6.6.1 General . 24
6.6.2 Basic (minimum) test schedule . 24
6.6.3 Full test schedule . 24
7 Mounting of specimens . 31

Figure 1 – Contact interface dimensions with a free (male) connector (right side)
mated with a fixed (female) connector (left side) . 9
Figure 2 – Fixed female connector Type I . 10
Figure 3 – Free male connector Type I . 12
Figure 4 – Fixed (female) connector Type II . 14
Figure 5 – Free (male) connector Type II . 16
Figure 6 – Fixed connector pin and pair grouping assignment for Type I (left, with
coding edges on one short side) and Type II (right, with coding edges on one long
side), front view of connector . 18
Figure 7 – Connector de-rating curve . 20
Figure 8 – Arrangement for contact resistance test . 22
Figure 9 – Arrangement for vibration test . 23

Table 1 – Dimensions for Figure 1 . 9
Table 2 – Dimensions for Figure 2 . 11
Table 3 – Dimensions for Figure 3 . 13
Table 4 – Dimensions for Figure 4 . 15
Table 5 – Dimensions for Figure 5 . 17
Table 6 – Pin assignment for 10/100 Mb Ethernet . 18
Table 7 – Pin assignment for 1 Gb Ethernet . 18
Table 8 – Climatic category. 19
Table 9 – Test group P . 25
Table 10 – Test group AP . 25
Table 11 – Test group BP . 27
Table 12 – Test group CP . 28
Table 13 – Test group DP . 29
Table 14 – Test group EP . 30
Table 15 – Test group FP . 31

– 4 – IEC 61076-3-122:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-122: Detail specification for 8-way, shielded, free and fixed
connectors for I/O and Gigabit Ethernet applications
in harsh environments
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.
International Standard IEC 61076-3-122 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/2554/FDIS 48B/2563/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.
A list of all parts in the IEC 61076 series, published under the general title Connectors for
electronic equipment – Product requirements, can be found on the IEC website.
The committee has decided that the contents of this 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 publication 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 61076-3-122:2017 © IEC 2017
Subcommittee 48B: Electrical connectors
Detail specification for
8-way, shielded, free and
fixed connectors for I/O
and Gigabit Ethernet
applications in harsh
environments
IEC
NOTE The above view shows a Type I connector pair, with coding edges on a Fixed connectors are
short side; for Type II connectors the coding edges are located on a long side. mounted on printed circuit
board by means of
soldering or press-in, the
free connector is attached
to wires by means of
soldering, crimping, IDC or
other termination
technology.
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-122: Detail specification for 8-way, shielded, free and fixed
connectors for I/O and Gigabit Ethernet applications
in harsh environments
1 Scope
This part of IEC 61076 covers 8-way, shielded, free and fixed rectangular connectors for I/O
and Gigabit Ethernet applications, suitable for use in harsh environments, and is intended to
specify the common dimensions, mechanical, electrical and environmental characteristics and
tests for this family of 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) – Chapter 581:
Electromechanical components for electronic equipment
IEC 60068-1, 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 electronic equipment – Tests and measurements – Part 1:
General
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 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 60512-3-1, 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

– 8 – IEC 61076-3-122:2017 © IEC 2017
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 60512-11-3, 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 60512-11-10, Connectors for electronic equipment – Tests and measurements –
Part 11-10: Climatic tests – Test 11j: Cold
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 60512-26-100, 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 61076-1:2006, Connectors for electronic equipment – Product requirements – Part 1:
Generic specification
IEC 61076-3, Connectors for electronic equipment – Product requirements – Part 3:
Rectangular connectors –Sectional specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-581,
IEC 61076-1, IEC 61076-3 and IEC 60512-1 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

4 Mating information
4.1 General
Dimensions are given in millimetres. Drawings are shown in third-angle projection. The shape
of connectors may deviate from those given in Figures 1 to 6 and Tables 1 to 5 as long as the
specified dimensions are not changed.
4.2 Contacts – mating conditions
AE8
A
AC8
IEC
Figure 1 – Contact interface dimensions with a free (male) connector (right side)
mated with a fixed (female) connector (left side)
Table 1 – Dimensions for Figure 1
Dimension Minimum Nominal Maximum
designation
AC8 0,7 0,8 0,9
AE8 3,7 3,8 3,9
– 10 – IEC 61076-3-122:2017 © IEC 2017
4.3 Fixed connector Type I
(Dimensions in millimetres)
P5
X
(10:1)
IEC
Detail A: contacts shall be located within their individual contact zone in the indicated area P5.
Section A-A: see Figure 3.
Figure 2a – Fixed female connector Type I – mating side view
A-A
IEC
NOTE Preferred free connector stop surface.
Figure 2b – Fixed (female) connector – section A-A with top view
Figure 2 – Fixed female connector Type I

Table 2 – Dimensions for Figure 2
(Dimensions in millimetres)
Dimension designation Minimum Nominal Maximum
AA5 3,1 3,2 3,3
AB5 2,3 2,4 2,5
AC5 4,2 4,3 4,4
AD5 5,7 5,8 5,9
BA5 7,35 7,4 7,5
BB5 5,1 5,2 5,3
BC5 3,88 3,9 3,95
BD5 1,15 1,2 1,3
BE5 1,4 1,5 1,6
BF5 0,95 1,05 1,1
BG5 R 0,65 R 0,7 R 0,75
CA5 1,45 1,5 1,55
CB5 2 2,1 2,2
CC5 5,25 5,3 5,35
CE5 R 0,9 R 1,0 R 1,05
CD5 1,05 1,1 1,15
CF5 3 3,1 3,2
P5 0,25 0,3 0,35
– 12 – IEC 61076-3-122:2017 © IEC 2017
4.4 Free connector Type I
P4
X
(10:1)
Y
A-A
IEC
Figure 3 – Free male connector Type I

Table 3 – Dimensions for Figure 3
(Dimensions in millimetres)
Dimension Minimum Nominal Maximum
designation
AA4 5,7 5,8 5,9
AB4 2,9 3 3,1
AC4 1,6 1,7 1,8
AD4 4,9 5 5,1
AE4 0,25 0,35 0,35
AF4 pos. 1 1,6 1,65 1,7
AF4 pos. 2 0 0,05 0,1
CA4 5,15 5,1 5,23
CB4 1,65 1,7 1,7
CC4 R 0,65 R 0,7 R 0,7
CD4 1,25 1,3 1,4
CF4 1 1 1,1
CG4 0,45 0,5 0,55
CH4 R 0,05 R 0,1 R 0,15
CI4 41° 43° 45°
CJ4 0,17 0,2 0,25
BA4 7,24 7,3 7,34
BB4 5,27 5,3 5,33
BC4 1,22 1,27 1,3
BD4 3,7 3,8 3,9
BE4 1,07 1,1 1,13
BF4 1,2 1,3 1,4
P4 0,25 0,3 0,35
– 14 – IEC 61076-3-122:2017 © IEC 2017
4.5 Fixed connector Type II
P7
X
(10:1)
IEC
Contact zone: Contacts shall be completely within their individual contact zone in the indicated area P7.
Figure 4a – Fixed (female) connector Type II – mating side view
C-C
IEC
NOTE Preferred free connector stop surface.
Figure 4b – Fixed (female) connector Type II – Section C-C with top view
Figure 4 – Fixed (female) connector Type II

Table 4 – Dimensions for Figure 4
(Dimensions in millimetres)
Dimension Minimum Nominal Maximum
designation
AA7 3,1 3,2 3,3
AB7 2,3 2,4 2,5
AC7 4,2 4,3 4,4
AD7 5,7 5,8 5,9
BA7 7,35 7,4 7,5
BB7 5,1 5,2 5,3
BC7 3,88 3,9 3,95
BD7 1,15 1,2 1,3
BE7 1,4 1,5 1,6
BF7 0,95 1,1 1,05
BG7 R 0,65 R 0,7 R 0,75
CA7 1,45 1,5 1,55
CB7 2 2,1 2,2
CC7 5,25 5,3 5,35
CE7 R 0,9 R 1,0 R 1,05
CD7 1,05 1,1 1,15
CF7 4,1 4,2 4,3
P7 0,25 0,3 0,35
– 16 – IEC 61076-3-122:2017 © IEC 2017
4.6 Free connector Type II
P6
X
(10:1)
Y
C-C
IEC
Figure 5 – Free (male) connector Type II

Table 5 – Dimensions for Figure 5
(Dimensions in millimetres)
Dimension Minimum Nominal Maximum
designation
AA6 5,7 5,8 5,9
AB6 2,9 3 3,1
AC6 1,6 1,7 1,8
AD6 4,9 5 5,1
AE6 0,25 0,3 0,35
AF6 pos. 1 (unmated) 1,6 1,65 1,7
AF6 pos. 2 (mated) 0 0,05 0,1
CA6 5,15 5,2 5,23
CB6 1,65 1,7 1,7
CC6 R 0,65 R 0,7 R 0,7
CD6 1,25 1,3 1,4
CE6 1 1,1 1,2
CF6 1 1 1,1
CG6 0,45 0,5 0,55
CH6 R 0,05 R 0,1 R 0,15
CI6 41° 43° 45°
CJ6 0,17 0,2 0,25
BA6 7,24 7,3 7,34
BB6 5,27 5,3 5,33
BC6 1,22 1,27 1,3
BD6 3,7 3,8 3,9
BE6 1,07 1,1 1,13
BF6 1,2 1,3 1,4
P6 0,25 0,3 0,35
5 Characteristics
5.1 General
Compliance to the test schedules is intended to ensure the reliability of all performance
parameters, over the range of operating climatic conditions. Stable and compliant contact
resistance is a good indication of the stability of transmission performance.
5.2 Pin and pair grouping assignment
For those specifications where pin and pair groupings are relevant, the pin and pair grouping
assignments shall be as shown in Figure 7, unless otherwise specified.
Board connector pin location, see Figure 6.

– 18 – IEC 61076-3-122:2017 © IEC 2017
IEC
Figure 6 – Fixed connector pin and pair grouping assignment for Type I (left, with
coding edges on one short side) and Type II (right, with coding edges
on one long side), front view of connector
For the board connector pin assignment for 10/100 Mb Ethernet applications, see Table 6. For
the board connector pin assignment for 1 Gb Ethernet applications, see Table 7.
Table 6 – Pin assignment for 10/100 Mb Ethernet
Pin No. Signal Function
1 TXD_P Transmit Data +
2 TXD_N Transmit Data –
3 RXD_P Receive Data +
4 N.C. Not connected
5 N.C. Not connected
6 RXD_N Receive Data –
7 N.C. Not connected
8 N.C. Not connected
Table 7 – Pin assignment for 1 Gb Ethernet
Pin No. Signal Function
1 BI_DA_P 1000Base-T signal, Bi-directional pair A +
2 BI_DA_N 1000Base-T signal, Bi-directional pair A –
3 BI_DB_P 1000Base-T signal, Bi-directional pair B +
4 BI_DC_P 1000Base-T signal, Bi-directional pair C +
5 BI_DC_N 1000Base-T signal, Bi-directional pair A –
6 BI_DB_N 1000Base-T signal, Bi-directional pair B –
7 BI_DD_P 1000Base-T signal, Bi-directional pair D +
8 BI_DD_N 1000Base-T signal, Bi-directional pair D –

5.3 Classification into climatic category
The lowest and highest temperatures and the duration of the damp-heat steady-state test
shall be selected from the preferred values stated in 2.3 of IEC 61076-1:2006. The connectors
are classified into climatic categories in accordance with the general rules given in
IEC 60068-1. The temperature range and severity of the damp heat, steady state test are
given in Table 8.
Table 8 – Climatic category
Climatic Lower Upper Damp heat,
category temperature temperature steady state
°C °C days
-55/85/21 -55 85 21
5.4 Electrical characteristics
5.4.1 Voltage proof
Conditions: IEC 60512-4-1, Test 4a, Standard atmospheric conditions
Mated connectors
All variants: 500 V d.c.; one contact to all other contacts connected together.
2 250 V d.c.; between bridged signal contacts on plug and board side and earth
shield.
5.4.2 Voltage rating
Signal connectors, intended for a voltage up to and including 50 V a.c./ 120 V d.c.
5.4.3 Current-temperature derating
Conditions: IEC 60512-5-2, Test 5b
All contacts, connected in series with the relevant contacts of the fixed connector are
connected with each other on the PCB, and where the free connector is terminated on wires
with the highest possible cross-section.
The current-carrying capacity of connectors in accordance with the requirements of 2.5 of
IEC 61076-1:2006 shall comply with the de-rating curve given in Figure 7.

– 20 – IEC 61076-3-122:2017 © IEC 2017
Current de-rating diagram
1,8
1,6
1,4
1,2
0,8
0,6
0,4
0,2
0 10 20 30 40 50 60 70 80 90 100
Ambient temperature  (°C)
IEC
0,5
t
 
NOTE 1 The maximum permissible current for a given ambient temperature (t) is:
I = 1,76⋅ 1−
 
(t)
 
NOTE 2 For ambient temperatures lower than 0 °C, the maximum permissible current per conductor is 1,76 A.
Figure 7 – Connector de-rating curve
5.4.4 Initial insulation resistance
Conditions: IEC 60512-3-1, Test 3a
Method A
Mated connectors
Test voltage: 500 V d.c.
All types: 500 MΩ minimum
5.5 Mechanical characteristics
5.5.1 Mechanical operation
Conditions: IEC 60512-9-1, Test 9a
Speed: 10 mm/s maximum
Rest: 1 s minimum (mated and unmated)
250 operations
5.5.2 Insertion and withdrawal forces
Conditions: IEC 60512-13-2, Test 13b
Speed: maximum rate of 12,5 mm per minute.
All types, insertion and withdrawal: 20 N maximum

Current  (A)
5.6 Transmission performance
5.6.1 General
Compliance to this document, in respect to transmission characteristics, shall be determined
according to specific test methods described in test group FP. All transmission performance
requirements shall apply between the reference planes specified in IEC 60512-26-100. All
transmission results shall be reported as worst case result for the corresponding pair or pair
combination after testing all samples.
NOTE In the following subclauses f is the frequency, expressed in MHz.
5.6.2 Insertion loss
Conditions according to IEC 60512-26-100, test 26a
Mated connectors
All pairs: ≤ 0,04x√ f dB from 1 MHz to 100 MHz.
Whenever the equation results in a value less than 0,1 dB, the requirement shall revert to
0,1 dB.
5.6.3 Return loss
Conditions according to IEC 60512-26-100, test 26b
Mated connectors
All pairs: ≥ 60-20log (f) dB from 1 MHz to 100 MHz.
Whenever the equation results in a value greater than 30 dB, the requirement shall revert to
30 dB.
5.6.4 Near end cross talk
Conditions according to IEC 60512-26-100, test 26c
Mated connectors
All pair combinations: ≥ 83-20log (f) dB from 1 MHz to 100 MHz.
Whenever the equation results in a value greater than 75 dB, the requirement shall revert to
75 dB.
5.6.5 Far end cross talk
Conditions according to IEC 60512-26-100, test 26d
Mated connectors
All pair combinations: ≥ 75,1-20log (f) dB from 1 MHz to 100 MHz.
Whenever the equation results in a value greater than 75 dB, the requirement shall revert to
75 dB.
5.6.6 Transverse conversion loss
Conditions according to IEC 60512-26-100, test 26f
Mated connectors
All pairs: ≥ 66-20log (f) dB from 1 MHz to 100 MHz.
Whenever the equation results in a value greater than 50 dB, the requirement shall revert to
50 dB.
5.6.7 Transfer conversion transfer loss
Conditions according to IEC 60512-26-100, test 26g
Mated connectors
All pairs: ≥ 66-20log (f) dB from 1 MHz to 100 MHz.
TCTL at frequencies that correspond to calculated values of greater than 50 dB shall revert to
a minimum requirement of 50 dB.

– 22 – IEC 61076-3-122:2017 © IEC 2017
5.6.8 Transfer impedance
Conditions according to IEC 60512-26-100, test 26e
Mated connectors
0,3
All pairs: ≤ 0,1 x f Ω from 1 MHz to 10 MHz and ≤ 0,02 x f Ω from 10 MHz to 80 MHz.
6 Tests and test schedule
6.1 General
This clause 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.
Testers may 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 sequences specified in this document.
The connectors shall have been processed in a careful and workmanlike manner, in
accordance with good current 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 un-mating is necessary for a certain test, the
same connectors shall be mated for subsequent tests.
6.2 Arrangement for contact resistance test (Figure 8)
IEC
Key
1 Fixed connector
2 Point P1
3 Point P2
4 Point A. Measure the DC resistance across each of the 8 signal pins
5 As short as practical (except for vibration test EP5)
6 Free connector
7 Point C
8 As short as practical (except for vibration test EP5)
9 Contact resistance measurement points
Figure 8 – Arrangement for contact resistance test

The test procedure is as follows:
a) Determine the bulk resistance of the fixed connector between points A and P1 of Figure 9
by calculation or by measurement. This resistance is noted and recorded as R .
AP1
b) Determine the bulk resistance of the free connector between points P2 and C of Figure 9
by calculation or by measurement. This resistance is noted and recorded as R .
CP2
c) Measure the total mated connector resistance between points A and C, following the
requirements and procedures of IEC 60512, Test 2a. This resistance is noted and
recorded as R .
AC
d) Calculate the contact resistance by subtracting the sum of the bulk resistance of the fixed
and free connectors from the total mated connector resistance.
Contact resistance = R − (R + R )
AC AP1 CP2
6.3 Arrangement for vibration test (test phase DP3) (Figure 9)
IEC
Key
1 Fixed connector vibration feature
2 Not relevant for vibration testing
3 Not relevant for vibration testing
4 Point A: secure to the vibrating member, measure the DC resistance across each of the 8 signal pins
5 Mounting plate
6 Free connector
7 Point C: secure to the non-vibrating membe.
8 Fixed connector rigidly fixed to the mounting plate
9 Contact resistance measurement point
10 Cable length ≥ 200 mm
Figure 9 – Arrangement for vibration test
6.4 Test procedures and measuring methods
The test methods specified and given in the relevant standards are the preferred methods, but
not necessarily the only ones that can be used. In case of dispute, however, the specified
method shall be used as the reference method.
Unless otherwise specified, all tests shall be carried out under standard atmospheric
conditions for testing as specified in IEC 60068-1.

– 24 – IEC 61076-3-122:2017 © IEC 2017
NOTE Where approval procedures are involved and alternative methods are employed, it is the responsibility of
the manufacturer to satisfy the authority granting approval that any alternative methods which he may use give
results equivalent to those obtained by the methods specified in this document.
6.5 Preconditioning
Before the tests are made, the connectors shall be preconditioned under standard
atmospheric conditions for testing as specified in IEC 60068-1 for a period of 24 h, unless
otherwise specified by the detail specification.
6.6 Test schedules
6.6.1 General
The test parameters required shall not be less than those listed in Clause 7.
6.6.2 Basic (minimum) test schedule
Not applicable.
6.6.3 Full test schedule
6.6.3.1 General
The following tests specify the characteristics which shall be checked and the requirements
which shall be fulfilled.
For a complete test sequence, 21 specimens shall be used (Test groups AP, BP, DP, EP and
FP shall each consist of 3 specimens. Test group CP consists of 6 specimens).
Contact resistance tests shall apply only to the interface.
6.6.3.2 Test group P – preliminary
All specimens shall be subjected to the following tests. All the test group specimens shall be
subjected to the preliminary group P tests in the following sequence, see Table 9.
The specimens shall then be divided into the appropriate number of groups (Tables 10 to 15).
All connectors in each group shall undergo the following tests as described in the sequence
given.
Table 9 – Test group P
Test Test Measurement to be performed
phase
Title IEC 60512 Severity or Title IEC 60512 Requirements
Test no condition of test Test no
P1 General  Visual 1a There shall be no
examination examination defects that would
impair normal
operation
Examination 1b The dimensions
of shall comply with
dimensions those specified in
and mass the detail
specification
Contact All contacts/ Low level Max. 80 mΩ initial,
P2 2a
resistance specimens contact 100 mΩ final
resistance
P3  500 V d.c. 1 min Insulation 3a 500 MΩ minimum
hold resistance
P4  Subject specimens Voltage 4a No breakdown or
to 500 V d.c. proof flashover
between adjacent
contacts and 2
250 V d.c. between
bridged signal
contacts and earth
shield
6.6.3.3 Test group AP – Climatic
Table 10 – Test group AP
Test Test Measurement to be performed
phase
Title IEC 60512 Severity or condition Title IEC 60512 Requirements
Test no of test Test no
AP1 Insertion and Measure the force 13b 20 N max. for
withdrawal necessary to insert / insertion and for
force withdraw the withdrawal
specimens at a max.
rate of 12,5 mm per
minute (latching
mechanism
inactivated)
AP2 Rapid 11d Subject mated  Meet visual
change of specimens to requirements,
temperature show no physical
10 cycles between
damage.
-55 °C and 85 °C with
30 min dwell at temp.
extremes and
1 min transition
between temperatures
AP3  Subject specimens to Voltage 4a No breakdown or
500 V d.c. between proof flashover
adjacent contacts and
2 250 V d.c. between
bridged signal
contacts and earth
shield
AP4  500 V d.c., 1 min hold Insulation 3a 500 MΩ minimum
resistance
AP5  All contacts/ Contact 2a 80 mΩ max.
specimens resistance
– 26 – IEC 61076-3-122:2017 © IEC 2017
Test Test Measurement to be performed
phase
Title IEC 60512 Severity or condition Title IEC 60512 Requirements
Test no of test Test no
AP6 Dry heat 11i Subject mated  Meet visual
specimens to a requirements,
temperature of 85 °C show no physical
during 21 days damage.
AP7 Humidity/tem Subject mated IEC 60068- Meet visual
perature specimens to 2-38, test requirements,
cycling Z/AD show no physical
10 cycles (10 days)
damage.
between 25 °C and
60 °C at 80 % to
100 % RH
AP8 Cold 11j Subject mated  Meet visual
samples to a requirements,
temperature of -55 °C show no physical
for 10 days damage.
AP9 Contact All contacts/ Low level 2a 100 mΩ max.
resistance specimens contact
resistance
AP10  Subject specimens to Voltage 4a No breakdown or
500 V d.c. between proof flashover
adjacent contacts and
...