IEC 60603-7-2:2010

Connectors for electronic equipment - Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz

IEC 60603-7-2:2010 covers 8-way, unshielded, free and fixed connectors, references dimensional, mechanical, electrical and environmental characteristics and tests in IEC 60603-7, and specifies electrical transmission requirements for frequencies up to 100 MHz. These connectors are typically used as category 5 connectors in class D cabling systems specified in ISO/IEC IS 11801. These connectors are intermateable and interoperable with other IEC 60603-7 series connectors as defined in Clause 2 of IEC 60603-7. These connectors are backward compatible with other IEC 60603-7 series connectors.

Connecteurs pour équipements électroniques - Partie 7-2: Spécification particulière pour les fiches et les embases non blindées à 8 voies pour la transmission de données à des fréquences jusqu'à 100 MHz

La CEI 60603-7-2:2010 couvre les fiches et les embases non blindées à 8 voies et renvoie à la CEI 60603-7 pour les caractéristiques et les essais dimensionnels, mécaniques, électriques et d'environnement et elle spécifie les exigences de transmission électrique pour des fréquences jusqu'à 100 MHz. Ces connecteurs sont normalement utilisés comme connecteurs de catégorie 5 dans les systèmes de câblage de classe D spécifiés dans l'ISO/CEI 11801. Ces connecteurs sont accouplables et interopérables avec les autres connecteurs de la série CEI 60603-7 comme cela est défini à l'article 2 de la CEI 60603-7. Ces connecteurs offrent une compatibilité amont avec les autres connecteurs de la série CEI 60603-7.

General Information

• Status: Published
• Publication Date: 25-Apr-2010
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: SC 48B - Electrical connectors
• Current Stage: PPUB - Publication issued
• Start Date: 26-Apr-2010
• Completion Date: 15-May-2010

Relations

• Revises: IEC 60603-7-2:2007 - Connectors for electronic equipment - Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz
• Effective Date: 05-Sep-2023

Overview

IEC 60603-7-2:2010 is an international standard published by the International Electrotechnical Commission (IEC) that specifies detailed requirements for 8-way, unshielded, free and fixed connectors designed for data transmission frequencies up to 100 MHz. These connectors are primarily used as category 5 connectors within class D cabling systems as defined in ISO/IEC IS 11801. The standard provides comprehensive reference to dimensional, mechanical, electrical, and environmental characteristics and test methods established in IEC 60603-7.

The IEC 60603-7-2 standard ensures that connectors are intermateable and interoperable with other connectors in the IEC 60603-7 series, promoting backward compatibility and uniform performance across systems using these connectors.

Key Topics

• Scope and Application
  Covers 8-way, unshielded connectors permitting data transmission up to 100 MHz. It applies to both free (plug) and fixed (socket) connectors used in electronic equipment.

• Electrical Performance
  Defines critical electrical transmission performance characteristics including insertion loss, return loss, propagation delay, delay skew, near-end crosstalk (NEXT), far-end crosstalk (FEXT), and transfer impedance tailored for frequencies up to 100 MHz.

• Mechanical and Dimensional Specifications
  Specifies connector dimensions and mechanical requirements to guarantee compatibility across products conforming to IEC 60603-7 series.

• Environmental and Reliability Testing
  Outlines test schedules and procedures for verifying contact resistance, vibration resistance, voltage proof, insulation resistance, and other environmental parameters to ensure long-term operational reliability.

• Interoperability and Compatibility
  Ensures connectors comply with international cabling standards like ISO/IEC IS 11801 and remain compatible with previous IEC 60603-7 series connectors for seamless network upgrades and expansions.

Applications

IEC 60603-7-2 connectors are widely used in data communication environments that require reliable category 5 cabling systems, including:

• Enterprise and Data Center Networks
  Facilitates consistent signal quality for structured cabling systems that support Ethernet and other network protocols up to 100 MHz bandwidth.

• Telecommunication Equipment
  Standardized connectors ensure reliable physical interfaces for routers, switches, and telecommunication distribution frames.

• Industrial Automation
  Enables robust and standardized connection points in industrial electronic equipment where unshielded connectors are adequate for signal integrity.

• Building Infrastructure
  Utilized in office and commercial building structured cabling where standardized category 5 cabling solutions support voice, video, and data transmission.

Related Standards

• IEC 60603-7 (Base Specification)
  Provides the overall framework for 8-way connectors, including shielded and unshielded types for various frequency ranges.

• ISO/IEC IS 11801
  Defines cabling system performance categories including Class D cabling that utilizes category 5 connectors detailed in IEC 60603-7-2.

• IEC 60512 Series
  Specifies test methods for electrical continuity, contact resistance, and signal integrity assessments relevant to IEC 60603-7 connectors.

• IEC 60603-7-1, 7-3, 7-4, 7-5
  Covers connectors for higher frequency ranges (up to 600 MHz and beyond) and shielded connector variants.

Summary

IEC 60603-7-2:2010 is a crucial international standard defining the specifications for 8-way, unshielded connectors suitable for category 5 data transmission up to 100 MHz. It ensures reliable, interoperable, and backward-compatible connectors that meet stringent mechanical, electrical, and environmental requirements. This standard supports industry-wide adoption of standardized connectors facilitating robust data communication systems in commercial, industrial, and telecommunication applications. Adhering to IEC 60603-7-2 helps manufacturers and network designers ensure compatibility and high performance in structured cabling deployments.

Standards Content (Sample)

IEC 60603-7-2 ®
Edition 2.0 2010-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment –
Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors,
for data transmissions with frequencies up to 100 MHz

Connecteurs pour équipements électroniques –
Partie 7-2: Spécification particulière pour les fiches et les embases non blindées
à 8 voies pour la transmission de données à des fréquences jusqu'à 100 MHz

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IEC 60603-7-2 ®
Edition 2.0 2010-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment –
Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors,
for data transmissions with frequencies up to 100 MHz

Connecteurs pour équipements électroniques –
Partie 7-2: Spécification particulière pour les fiches et les embases non blindées
à 8 voies pour la transmission de données à des fréquences jusqu'à 100 MHz

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 31.220.10 ISBN 978-2-88910-229-7
– 2 – 60603-7-2 © IEC:2010
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 General .7
1.1 Scope.7
1.2 Normative references .7
2 Terms and definitions .8
3 Common features and isometric view .8
4 Cable terminations and internal connections – Fixed and free connectors .8
5 Gauges .8
6 Characteristics .8
6.1 General .8
6.2 Pin and pair grouping assignment. .8
6.3 Classification into climatic category.8
6.4 Electrical characteristics.8
6.4.1 Creepage and clearance distances.8
6.4.2 Voltage proof.8
6.4.3 Current-temperature derating .9
6.4.4 Initial contact resistance – Interface only (separable fixed and free
contact) .9
6.4.5 Input to output d.c. resistance .9
6.4.6 Input to output d.c. resistance unbalance.9
6.4.7 Initial insulation resistance .9
6.4.8 Transfer impedance.9
6.4.9 Coupling attenuation.9
6.5 Transmission characteristics .9
6.5.1 General .9
6.5.2 Insertion loss.9
6.5.3 Return loss .10
6.5.4 Propagation delay .10
6.5.5 Delay skew.10
6.5.6 NEXT .10
6.5.7 Power sum NEXT (for information only) .10
6.5.8 FEXT.10
6.5.9 Power sum FEXT (for information only) .11
6.5.10 Transverse conversion .11
6.5.11 Transverse conversion transfer .11
6.6 Mechanical.11
7 Tests and test schedule.11
7.1 General .11
7.2 Arrangement for contact resistance test: .11
7.3 Arrangement for vibration test .11
7.4 Test procedures and measuring methods .11
7.5 Preconditioning .12
7.6 Wiring and mounting of specimens .12
7.6.1 Wiring.12
7.6.2 Mounting .12

60603-7-2 © IEC:2010 – 3 –
7.7 Test schedules .12
7.7.1 Basic (minimum) test schedule .12
7.7.2 Full test schedule .12
Bibliography.14

Table 1 – Test Group EP .13

– 4 – 60603-7-2 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –

Part 7-2: Detail specification for 8-way, unshielded, free and fixed
connectors, for data transmissions with frequencies up to 100 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
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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
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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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6) All users should ensure that they have the latest edition of this publication.
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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 60603-7-2 has been prepared by subcommittee 48B: Connectors,
of IEC technical committee 48: Electromechanical components and mechanical structures for
electronic equipment.
This second edition of IEC 60603-7-2 cancels and replaces the first edition issued in 2007,
and constitutes a technical revision.
The main technical changes with regard to the previous edition are as follows:
– Removal of test methods that are now referenced to IEC 60512-27-100.
– Addition of TCL and TCTL requirements.
– Removal of the electrical, mechanical, dimensional, environmental conditioning tests by
reference to IEC 60603-7.
60603-7-2 © IEC:2010 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
48B/2135/FDIS 48B/2176/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 60603 series, under the general title Connectors for electronic
equipment, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 60603-7-2 © IEC:2010
INTRODUCTION
IEC 60603-7 is the base specification of the whole series. Subsequent specifications do not
duplicate information given in the base document, but list only additional requirements. For
complete specification regarding a component of a higher number document all lower
numbered documents shall be considered as well. The following diagram shows the
interrelation of the documents:

Unshielded Shielded
IEC 60603-7 IEC 60603-7-1
3 MHz
100 MHz
IEC 60603-7-2 IEC 60603-7-3
IEC 60603-7-4 IEC 60603-7-5
250 MHz
IEC 60603-7-41 IEC 60603-7-51
500 MHz
600 MHz
Indicates reference for IEC 60603-7-7
dimensions, mechanical and
electrical characteristics,
tests and test schedules.
IEC 60603-7-71
1 000 MHz
Indicates reference for
transmission performance
(backward compatibility)
60603-7-2 © IEC:2010 – 7 –
CONNECTORS FOR ELECTRONIC EQUIPMENT –

Part 7-2: Detail specification for 8-way, unshielded, free and fixed
connectors, for data transmissions with frequencies up to 100 MHz

1 General
1.1 Scope
This part of IEC 60603 covers 8-way, unshielded, free and fixed connectors, references
dimensional, mechanical, electrical and environmental characteristics and tests in
IEC 60603-7, and specifies electrical transmission requirements for frequencies up to
100 MHz. These connectors are typically used as category 5 connectors in class D cabling
systems specified in ISO/IEC IS 11801.
These connectors are intermateable and interoperable with other IEC 60603-7 series
connectors as defined in Clause 2 of IEC 60603-7.
These connectors are backward compatible with other IEC 60603-7 series connectors.
NOTE Transmission performance categories: in this IEC standard, the term “category”, when used in reference to
transmission performance, refers to those categories defined by ISO/IEC 11801.
1.2 Normative references
The following referenced documents are indispensable for the application 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 60512-1-100, Connectors for electronic equipment – Part 1-100: General – Applicable
publications
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 60512-27-100, Connectors for electronic equipment – Tests and measurements – Part
27-100: Signal integrity tests up to 500 MHz on IEC 60603-7 series connectors – Tests 27a to

27g
IEC 60603-7:2008, Connectors for electronic equipment – Part 7: Detail specification for 8-
way, unshielded, free and fixed connectors
IEC 61156 (all parts): Multi-core and symmetrical pair/quad cables for digital communications
IEC 62153-4-12: 2009, Metallic communication cable test methods – Part 4-12:
Electromagnetic compatibility (EMC) – Coupling attenuation or screening attenuation of
connecting hardware Absorbing clamp method
___________
To be published.
– 8 – 60603-7-2 © IEC:2010
2 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60603-7, Clause 2
apply as well as the following.
2.1
backward compatibility
the backward compatibility requirement ensures that a free or fixed connector which is in
compliance with this standard, mated with a fixed or free connector respectively in compliance
with any lower frequency IEC 60603-7 series connector, fully complies with the requirements
of the lower frequency IEC 60603-7 series connector
3 Common features and isometric view
See Clause 3 of IEC 60603-7 for dimensions, views and requirements.
4 Cable terminations and internal connections – Fixed and free connectors
See Clause 4 of IEC 60603-7 for cable termination and internal connections types.
5 Gauges
The gauges as defined by Clause 5 of IEC 60603-7 shall apply.
6 Characteristics
6.1 General
Connectors according to IEC 60603-7-2 shall also conform to all relevant requirements
specified by IEC 60603-7.
6.2 Pin and pair grouping assignment
The pin and pair grouping assignment of 6.2 of IEC 60603-7 applies.
6.3 Classification into climatic category
Connectors according to IEC 60603-7-2 are classified in the same climatic categories as
defined by IEC 60603-7.
6.4 Electrical characteristics
Connectors according to IEC 60603-7-2 shall also conform to the electrical characteristics
specified by IEC 60603-7.
6.4.1 Creepage and clearance distances
See 6.4.1 of IEC 60603-7.
6.4.2 Voltage proof
See 6.4.2 of IEC 60603-7.
60603-7-2 © IEC:2010 – 9 –
6.4.3 Current-temperature derating
See 6.4.3 of IEC 60603-7.
6.4.4 Initial contact resistance – Interface only (separable fixed and free contact)
See 6.4.4 of IEC 60603-7.
6.4.5 Input to output d.c. resistance
See 6.4.5 of IEC 60603-7.
6.4.6 Input to output d.c. resistance unbalance
See 6.4.6 of IEC 60603-7.
6.4.7 Initial insulation resistance
See 6.4.7 of IEC 60603-7.
6.4.8 Transfer Impedance
See 6.4.8 of IEC 60603-7.
6.4.9 Coupling attenuation
Conditions:
IEC 62153-4-12
Mated connectors
All pairs: ≥35 dB from 30 MHz to 100 MHz
≥75 – 20log(f) dB from 100 MHz to 1 000 MHz
NOTE Coupling attenuation is assumed to be fulfilled when transverse conversion loss and transverse conversion
transfer loss are met from 1 MHz to 100 MHz.
6.5 Transmission characteristics
6.5.1 General
Compliance to this standard, in respect to transmission characteristics, is determined
according to specific test methods described in test group EP, see Table 1. The
interoperability of connectors compliant to this standard shall be demonstrated by testing the
)
fixed connectors with the full range of free connectors according to IEC 60512-27-100 .
All transmission performance requirements apply between the reference planes specified in
IEC 60512-27-100.
NOTE In the following subclauses f is the frequency expressed in MHz.
6.5.2 Insertion loss
Conditions:
IEC 60512, test 27a
___________
)
For transmission performance, interoperability and backwards compatibility, IEC 60512-26-100 may be used as
an alternative to IEC 60512-27-100 for connecting hardware that has been previously qualified to IEC 60603-7-
2 edition 1. Where IEC 60512-26-100 is used that shall be reported.

– 10 – 60603-7-2 © IEC:2010
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.
6.5.3 Return loss
Conditions:
IEC 60512, test 27b
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.
6.5.4 Propagation delay
All pairs: ≤ 2,5 ns
Propagation delay test does not need to be performed, since it is assumed that
connectors comply by design.
6.5.5 Delay skew
All pair combinations: ≤ 1,25 ns
NOTE This characteristic is calculated from the individual propagation delay measurements and, as with
propagation delay (6.5.4), it is assumed that connectors comply by design.
6.5.6 NEXT
Conditions:
IEC 60512, test 27c
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.
6.5.7 Power sum NEXT (for information only)
Conditions:
Mated connectors
−NEXT
n ik
PS NEXT = −10log 10
k ∑
i=1,i≠k
All pairs: ≥ 80-20log (f) dB from 1 MHz to 100 MHz .
NOTE This characteristic is calculated from the individual NEXT measurements and connector compliance is
achieved by compliance to the NEXT equirements (6.5.6).
6.5.8 FEXT
Conditions:
IEC 60512, test 27d
Mated connectors
All pair combinations: ≥ 75,1-20log (f) dB from 1 MHz to 100 MHz .

60603-7-2 © IEC:2010 – 11 –
Whenever the equation results in a value greater than 75 dB, the requirement shall
revert to 75 dB.
6.5.9 Power sum FEXT (for information only)
Conditions:
Mated connectors
−FEXT
n ik
PS FEXT = −10log 10
k ∑
i=1,i≠k
All pairs: ≥ 72,1-20log (f) dB from 1 MHz to 100 MHz .
NOTE This characteristic is calculated from the individual FEXT measurements and connector compliance is
achieved by compliance to the FEXT requirements (6.5.8).
6.5.10 Transverse conversion
Conditions:
IEC 60512, test 27f
Mated connectors
≥ 68-20log (f) dB from 1 MHz to 100 MHz .
All pairs :
Whenever the equation results in a value greater than 50 dB, the requirement shall
revert to 50 dB.
6.5.11 Transverse conversion transfer
Conditions:
IEC 60512, test 27g
Mated connectors
All pairs: ≥ 68-20log (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.
6.6 Mechanical
Connectors according to IEC 60603-7-2 shall also conform to the mechanical characteristics
specified by IEC 60603-7.
7 Tests and test schedule
7.1 General
See 7.1 of IEC 60603-7.
7.2 Arrangement for contact resistance test
For useful information regarding contact resistance tests see 7.2 of IEC 60603-7.
7.3 Arrangement for vibration test
For useful information regarding the principle of vibration tests see 7.3 of IEC 60603-7.
7.4 Test procedures and measuring methods
See 7.4 of IEC 60603-7.
– 12 – 60603-7-2 © IEC:2010
7.5 Preconditioning
See 7.5 of IEC 60603-7.
7.6 Wiring and mounting of specimens
7.6.1 Wiring
Wiring of these connectors shall take into account the wire and cable diameter of the cables
defined in the IEC 61156 series as applicable by manufacturer’s specification.
7.6.2 Mounting
See 7.6.2 of IEC 60603-7.
7.7 Test schedules
The test parameters required shall not be less than those listed in Clause 6.
7.7.1 Basic (minimum) test schedule
Not applicable.
7.7.2 Full test schedule
7.7.2.1 General
In addition to the test schedule of IEC 60603-7, one further group of two sets of mated
connectors is required for group EP. The free connectors for group EP shall additionally meet
the requirements of the IEC 60512-27-100.
7.7.2.2 Test group P preliminary
All the test group specimens shall be subjected to the preliminary group P of IEC 60603-7.
7.7.2.3 Test group AP
See 7.7.2.3 of IEC 60603-7.
7.7.2.4 Test group BP
See 7.7.2.4 of IEC 60603-7.
7.7.2.5 Test group CP
See 7.7.2.5 of IEC 60603-7.
7.7.2.6 Test group DP
See 7.7.2.6 of IEC 60603-7.
60603-7-2 © IEC:2010 – 13 –
7.7.2.7 Test group EP
Table 1 – Test group EP
Test Test Measurement to be performed
phase
Title IEC 60512 Severity or Title IEC 60512 Requirements
Test No. condition of test Test No.

EP1  All pairs, one Insertion loss Test 2
...