IEC 61076-3-104:2017

IEC 61076-3-104 ®
Edition 3.0 2017-05
INTERNATIONAL
STANDARD
colour
inside
Connectors for electrical and electronic equipment – Product requirements –
Part 3-104: Detail specification for 8-way, shielded free and fixed connectors for
data transmissions with frequencies up to 2 000 MHz
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IEC 61076-3-104 ®
Edition 3.0 2017-05
INTERNATIONAL
STANDARD
colour
inside
Connectors for electrical and electronic equipment – Product requirements –

Part 3-104: Detail specification for 8-way, shielded free and fixed connectors for

data transmissions with frequencies up to 2 000 MHz

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.120.10 ISBN 978-2-8322-4362-6

– 2 – IEC 61076-3-104:2017 © IEC 2017
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Technical information . 13
3.1 Terms and definitions . 13
3.2 Levels of compatibility . 14
3.2.1 Interchangeability level . 14
3.2.2 Intermateabilty . 14
3.2.3 Interoperability . 14
3.3 Groups of related connectors . 14
3.4 Classification into climate categories . 15
3.5 Clearance and creepage distances . 15
3.6 Current carrying capacity . 15
3.7 Marking . 15
3.7.1 General . 15
3.7.2 Performance marking . 15
4 Dimensional information . 15
4.1 General . 15
4.2 Isometric views and common features . 16
4.2.1 General . 16
4.2.2 Fixed connector variant 01 (cable outlet) . 17
4.2.3 Fixed connector variant 02, (printed circuit board outlet) . 20
4.2.4 Free connector variant 03 (4-pair plug) . 21
4.2.5 Free connector variant 04 (2-pair plug) . 25
4.2.6 Free connector variant 05 (1-pair plug) . 27
4.3 Terminations . 30
4.3.1 General . 30
4.3.2 Referenced solderless termination types . 30
4.3.3 Non-referenced termination types . 31
4.3.4 Solder terminations . 31
4.4 Mounting information . 31
4.4.1 General . 31
4.4.2 Mounting information for fixed connectors . 31
4.4.3 Mounting information for free connectors . 31
4.5 Gauges . 31
4.5.1 Sizing gauges and retention force gauges; mechanical function,
engaging/separating/insertion/withdrawal force . 31
4.6 Mechanical function, engaging/separating/insertion/withdrawal force gauges . 38
4.7 Test panels . 38
5 Characteristics . 39
5.1 General . 39
5.2 Pin and pair grouping assignment . 39
5.3 Climatic categories . 39
5.4 Electrical characteristics . 40
5.4.1 Creepage and clearance distances . 40
5.4.2 Voltage proof . 40

5.4.3 Current carrying capacity . 40
5.4.4 Initial contact and shield resistance . 41
5.4.5 Input to output resistance . 41
5.4.6 Input to output resistance unbalance . 41
5.4.7 Insulation resistance . 42
5.5 Transmission characteristics . 42
5.5.1 General . 42
5.5.2 Insertion loss . 42
5.5.3 Return loss . 42
5.5.4 Propagation delay . 43
5.5.5 Delay skew . 43
5.5.6 NEXT loss . 43
5.5.7 Power sum NEXT loss (for information only) . 43
5.5.8 FEXT loss . 44
5.5.9 Power sum FEXT loss (for information only) . 44
5.5.10 Transverse conversion loss . 45
5.5.11 Transverse conversion transfer loss . 45
5.5.12 Power sum alien (exogenous) NEXT loss . 46
5.5.13 Power sum alien (exogenous) FEXT loss . 46
5.5.14 Coupling attenuation . 47
5.5.15 Transfer impedance . 47
5.6 Mechanical characteristics . 47
6 Test schedule . 48
6.1 General . 48
6.2 Test procedures and measuring methods . 48
6.3 Preconditioning . 48
6.4 Wiring and mounting of specimens . 48
6.4.1 Wiring . 48
6.4.2 Mounting . 48
6.4.3 Arrangement for contact resistance measurement and procedure . 49
6.4.4 Arrangement for dynamic stress tests (test phase CP1) . 49
6.5 Test schedules . 50
6.5.1 General . 50
6.5.2 Basic (minimum) test schedule . 50
6.5.3 Full test schedule . 50
Annex A (normative) Gauging procedure. 59
A.1 Fixed connectors . 59
A.2 Free connectors . 59
Annex B (normative) Locking device mechanical operation – test procedure and
requirements . 60
B.1 Object . 60
B.2 Preparation of the specimens . 60
B.3 Test method . 60
B.4 Final measurements . 60
Annex C (normative) Plug and outlet interoperability qualification . 61
C.1 Object . 61
C.2 Test equipment . 61
C.3 Test procedure . 62
Annex D (normative) General requirements for the measurement set-up . 63

– 4 – IEC 61076-3-104:2017 © IEC 2017
D.1 Test instrumentation . 63
D.2 Coaxial cables and test leads for network analysers . 63
D.3 Measurement precautions . 63
D.4 Balun requirements . 64
D.5 Reference components for calibration . 65
D.5.1 Reference loads for calibration . 65
D.5.2 Reference cables for calibration . 65
D.6 Termination loads for termination of conductor pairs . 65
D.7 Termination of screens . 66
D.8 Test specimen and reference planes . 67
Annex E (normative) Insertion loss . 68
E.1 Object . 68
E.2 Test method . 68
E.3 Test set up . 68
E.4 Procedure . 68
E.4.1 Calibration . 68
E.4.2 Measurement . 68
E.5 Test report . 69
E.6 Accuracy . 69
Annex F (normative) Return loss . 70
F.1 Object . 70
F.2 Test method . 70
F.3 Test set-up . 70
F.4 Procedure . 70
F.4.1 Calibration . 70
F.4.2 Measurement . 70
F.5 Test report . 70
F.6 Accuracy . 70
Annex G (normative) Near end cross talk (NEXT) . 72
G.1 Object . 72
G.2 Test method . 72
G.3 Test set-up . 72
G.4 Procedure . 73
G.4.1 Calibration . 73
G.4.2 Establishment of noise floor . 73
G.4.3 Measurement . 73
G.5 Test report . 74
G.6 Accuracy . 74
Annex H (normative) Far end cross talk (FEXT) . 75
H.1 Object . 75
H.2 Test method . 75
H.3 Test set-up . 75
H.4 Procedure . 76
H.4.1 Calibration . 76
H.4.2 Establishment of noise floor . 76
H.5 Measurement . 76
H.6 Test report . 77
H.7 Accuracy . 77

Annex I (normative) Transverse Conversion Loss (TCL) and Transverse Conversion
Transfer Loss (TCTL) . 78
I.1 Object . 78
I.2 Test method . 78
I.3 Test set-up . 78
I.4 Procedure . 79
I.4.1 Calibration . 79
I.4.2 Noise floor . 79
I.4.3 Measurement . 80
I.5 Test report . 80
I.6 Accuracy . 80
Annex J (normative) Termination of balun . 81
J.1 Termination of balun with low return loss for common mode. 81
J.2 Centre tap connected to ground . 81
J.3 Centre tap open . 81
Bibliography . 83

Figure 1 – Isometric view of cable and PCB fixed connectors. 16
Figure 2 – Isometric view showing free connector for 4, 2 and 1 pair . 16
Figure 3 – Variant 01 drawing 1 . 17
Figure 4 – Variant 01 drawing 2 . 19
Figure 5 – Variant 02 drawing . 20
Figure 6 – Variant 03 drawing 1 . 21
Figure 7 – Variant 03 drawing 2 . 22
Figure 8 – Variant 03 drawing 3 . 24
Figure 9 – Variant 04 drawing 1 . 25
Figure 10 – Variant 04 drawing 2 . 26
Figure 11 – Variant 05 drawing 1 . 27
Figure 12 – Variant 05 drawing 2 . 28
Figure 13 – Variant 05 drawing 3 . 29
Figure 14 – Fixed connector location "Go" gauge . 32
Figure 15 – Fixed connector location "No-Go" gauge . 32
Figure 16 – Fixed connector size "Go" gauge . 33
Figure 17 – Fixed connector size "No-Go" gauge . 34
Figure 18 – Free connector location "Go" gauge . 35
Figure 19 – Free connector location "No-Go" gauge. 36
Figure 20 – Free connector size "Go" gauge . 37
Figure 21 – Free connector size "No-Go" gauge . 38
Figure 22 – Fixed connector panel . 39
Figure 23 – Schematic diagram of fixed connector . 39
Figure 24 – Connector de-rating curve . 41
Figure 25 – Arrangement for contact resistance measurement . 49
Figure 26 – Arrangement for dynamic stress . 50
Figure C.1 – Precision test fixtures (covers) . 61
Figure D.1 – 180° hybrid used as a balun . 64

– 6 – IEC 61076-3-104:2017 © IEC 2017
Figure D.2 – Calibration of reference loads . 65
Figure D.3 – Resistor load . 66
Figure D.4 – Definition of reference planes . 67
Figure E.1 – Calibration . 68
Figure E.2 – Measuring set-up . 69
Figure G.1 – NEXT measurement differential mode only terminations . 72
Figure G.2 – NEXT measurement differential and common mode terminations . 73
Figure H.1 – FEXT measurement differential mode only terminations . 75
Figure H.2 – FEXT measurement differential and common mode terminations . 76
Figure I.1 – TCL measurement . 78
Figure I.2 – TCTL measurement . 79
Figure J.1 – Balanced attenuator for balun centre tap grounded . 81
Figure J.2 – Balanced attenuator for balun centre tap open . 82

Table 1 – Variant 01 drawing 1 dimensions . 18
Table 2 – Variant 01 drawing 2 dimensions . 19
Table 3 – Variant 02 drawing dimensions . 20
Table 4 – Variant 03 drawing 1 dimensions . 22
Table 5 – Variant 03 drawing 2 dimensions . 23
Table 6 – Variant 03 drawing 3 dimensions . 24
Table 7 – Variant 04 drawing 1 dimensions . 25
Table 8 – Variant 04 drawing 2 dimensions . 26
Table 9 – Variant 05 drawing 1 dimensions . 27
Table 10 – Variant 05 drawing 2 dimensions . 28
Table 11 – Variant 05 drawing 3 dimensions . 29
Table 12 – Climatic categories – Selected values . 40
Table 13 – minimum creepage and clearance distances . 40
Table 14 – Insertion loss . 42
Table 15 – Return loss . 43
Table 16 – NEXT loss . 43
Table 17 – Power sum NEXT loss . 44
Table 18 – FEXT loss . 44
Table 19 – Power sum FEXT loss . 45
Table 20 – Transverse conversion loss . 45
Table 21 – Transverse conversion transfer loss . 45
Table 22 – Power sum alien (exogenous) NEXT loss . 46
Table 23 – Power sum alien (exogenous) FEXT loss . 46
Table 24 – Coupling attenuation . 47
Table 25 – Transfer impedance . 47
Table 26 – Test group P . 51
Table 27 – Test group AP . 52
Table 28 – Test group BP . 54
Table 29 – Test group CP . 55

Table 30 – Test group DP . 56
Table 31 – Test group EP . 57
Table 32 – Test group FP . 58
Table 33 – Test group GP . 58
Table D.1 – Test balun performance characteristics . 64
Table F.1 – Uncertainty band of return loss measurement at frequencies below
100 MHz . 71

– 8 – IEC 61076-3-104:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-104: Detail specification for 8-way, shielded free and fixed
connectors for data transmissions with frequencies up to 2 000 MHz

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,
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61076-3-104 has been prepared by subcommittee 48B: Electrical
connectors, of IEC technical committee 48: Electrical connectors and mechanical structures
for electrical and electronic equipment.
This third edition of IEC 61076-3-104 cancels and replaces the second edition, published in
2006, and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the title has been changed to incorporate transmissions with frequencies up to 2 000 MHz;
b) the drawings of some styles have been corrected for clarification;
c) Figures 23 and 24 have been updated;

d) Figure 3 has been updated to include reference dimensions and dimensional format
changes;
e) the dimensions of Figure 7 have been updated;
f) the type designation and ordering information has been removed for consistency with the
most updated sectional specification;
g) the test schedule was updated to include appropriate IEC 60512 Test Nos;
h) the electrical performance requirements have been revised for 2 GHz level;
i) interchangeability information has been added for performance categories.
The text of this International Standard is based on the following documents:
FDIS Report on voting
48B/2560/FDIS 48B/2565/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 of 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.
A bilingual version of this publication may be issued at a later date.

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.
– 10 – IEC 61076-3-104:2017 © IEC 2017
INTRODUCTION
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning
connectors given in 4.2.2 and 4.2.4.
The IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he is willing to give free licences with
applicants throughout the world. In this respect, the statement of the holder of this patent right
is registered with the IEC.
Information may be obtained from:
The Siemon Company
Siemon Business Park
101 Siemon Company Drive
Watertown, CT 06795-0400
USA
Attention is drawn to the possibility that some of the elements of this International Standard
may be the subject of patent rights other than those identified above. IEC shall not be held
responsible for identifying any or all such patent rights.

CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 3-104: Detail specification for 8-way, shielded free and fixed
connectors for data transmissions with frequencies up to 2 000 MHz

1 Scope
This part of IEC 61076 establishes uniform specifications, type testing requirements for
8-way, shielded free and fixed connectors for data transmissions with frequencies up to
2 000 MHz, and used as category 7 connectors in class F cabling systems specified in
A A
ISO/IEC 11801-1. It contains all test methods and sequences, severity and preferred values
for dimensions and characteristics.
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 – Part 581: Electromechanical
components for electronic equipment
IEC 60068-1, Environmental testing – Part 1: General and guidance
IEC 60169-15, Radio-frequency connectors – Part 15: R.F. coaxial connectors with inner
diameter of outer conductor 4.13 mm (0.163 in) with screw coupling – Characters impedance
50 ohms (Type SMA)
IEC 60352-2, Solderless connections – Part 2: Crimped connections – General requirements,
test methods and practical guidance
IEC 60352-3, Solderless connections – Part 3: Solderless accessible insulation displacement
connections – General requirements, test methods and practical guidance
IEC 60352-4, Solderless connections – Part 4: Solderless non-accessible insulation
displacement connections – General requirements, test methods and practical guidance
IEC 60352-5, Solderless connections – Part 5: Press-in connections – General requirements,
test methods and practical guidance
IEC 60352-6, Solderless connections – Part 6: Insulation piercing connections – General
requirements, test methods and practical guidance
IEC 60352-7, Solderless connections – Part 7: Spring clamp connections – General
requirements, test methods and practical guidance
IEC 60512-1-1, Connectors for electronic equipment – Tests and measurements – Part 1-1:
General examination – Test 1a: Visual examination

– 12 – IEC 61076-3-104:2017 © IEC 2017
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 60512-2-5, 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 60512-6-4, 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 60512-13-2, 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 – Test 26a to 26g
IEC 60512-28-100, Connectors for electronic equipment – Tests and measurements –
Part 28-100: Signal integrity tests up to 1 000 MHz on IEC 60603-7 and
...