IEC 62946-02:2017

Connectors for electronic equipment - Part 02: Detail specification for 8-way, unshielded, free and fixed high density connectors for data transmission up to 250 MHz and with current carrying capacity up to 1 A

IEC 62946-02:2017(E) covers 8-way, unshielded free and fixed high density connectors for data transmission with frequencies up to 250 MHz and with extra low voltage current carrying capabilities up to 1 A, and is intended to specify the common dimensions, mechanical, electrical, signal integrity and environmental characteristics and tests for these connectors.
The contents of the corrigendum of March 2020 have been included in this copy.

General Information

• Status: Published
• Publication Date: 19-Jan-2017
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: SC 48B - Electrical connectors
• Current Stage: PPUB - Publication issued
• Start Date: 20-Jan-2017
• Completion Date: 18-Feb-2017

Relations

• Corrected By: IEC 62946-02:2017/COR1:2020 - Corrigendum 1 - Connectors for electronic equipment - Part 02: Detail specification for 8-way, unshielded, free and fixed high density connectors for data transmission up to 250 MHz and with current carrying capacity up to 1 A
• Effective Date: 05-Sep-2023

Overview

IEC 62946-02:2017 is an IEC detail specification for 8‑way, unshielded, free and fixed high‑density connectors intended for data transmission up to 250 MHz and for extra‑low‑voltage currents up to 1 A. This edition (including the March 2020 corrigendum) defines common dimensions and the mechanical, electrical, signal‑integrity and environmental characteristics and required tests for these compact connector pairs (fixed connectors mounted to PCBs and free connectors attached to wires).

Key topics and technical requirements

• Scope & hardware morphology
  • 8‑way, unshielded, high‑density free and fixed connector pairs (fixed = PCB mounted; free = wire/cable attached).
  • Detailed contact interface dimensions and pin/pair grouping assignments.
• Electrical characteristics
  • Limits and test methods for contact resistance, initial insulation resistance, voltage proof, and current–temperature derating (derating curve included).
  • Requirements for input‑to‑output resistance and unbalance.
  • Transfer impedance and related electrical checks where applicable.
• Signal integrity parameters
  • Defined measurement criteria for insertion loss (IL), return loss (RL), NEXT, FEXT, propagation delay, delay skew, TCL and TCTL up to 250 MHz.
• Mechanical characteristics
  • Specified mechanical operation, insertion/withdrawal forces, mating conditions and endurance.
• Environmental and reliability testing
  • Climatic classification, creepage and clearance distances, and a full test schedule covering groups such as preliminary tests, mechanical endurance, climatic, corrosion, moisture, dynamic stress, latch/cable stress and signal‑integrity verification.
• Referenced standards
  • Normative references include IEC 60068‑1 (environmental testing), IEC 60512 (connector tests and measurements) and IEC 60050‑581 (vocabulary).

Practical applications

IEC 62946‑02 is targeted at designers and manufacturers who need a standardized specification for compact, unshielded data connectors where moderate frequency (≤250 MHz) and low current (≤1 A) requirements apply. Typical uses include:

• Compact data links and internal wiring in electronic equipment
• PCB‑to‑cable interfaces in consumer, telecommunications and industrial electronics
• High‑density harness connectors where space and signal integrity at HF frequencies matter

Who should use this standard

• Connector manufacturers and component designers specifying form, fit and electrical performance
• PCB designers and system engineers selecting interconnects for data links up to 250 MHz
• Test laboratories and quality teams conducting conformity and reliability testing
• Procurement and compliance professionals verifying vendor claims against IEC requirements

Related standards

• IEC 60068‑1 - Environmental testing: general guidance
• IEC 60512 series - Connectors for electronic equipment - tests and measurements
• IEC 60050‑581 - IEV: Electromechanical components vocabulary

Keywords: IEC 62946-02, 8‑way connector, high‑density connector, unshielded connector, 250 MHz data transmission, connector standard, signal integrity, contact resistance, environmental testing.

Standards Content (Sample)

IEC 62946-02 ®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Connectors for electronic equipment –
Part 02: Detail specification for 8-way, unshielded, free and fixed high density
connectors for data transmission with frequencies up to 250 MHz and with
current carrying capacity up to 1 A
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62946-02 ®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Connectors for electronic equipment –

Part 02: Detail specification for 8-way, unshielded, free and fixed high density

connectors for data transmission with frequencies up to 250 MHz and with

current carrying capacity up to 1 A

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.220.10 ISBN 978-2-8322-3838-7

– 2 – IEC 62946-02:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Common features and typical connector pair . 9
4.1 Mating information . 9
4.1.1 General . 9
4.1.2 Contacts – mating conditions . 9
4.1.3 Fixed connector . 10
4.1.4 Free connector . 12
5 Characteristics . 13
5.1 General . 13
5.2 Pin and pair grouping assignment . 13
5.3 Classification into climatic category . 13
5.4 Electrical characteristics . 13
5.4.1 General . 13
5.4.2 Creepage and clearance distances . 13
5.4.3 Contact resistance . 14
5.4.4 Voltage proof . 14
5.4.5 Current-temperature derating . 14
5.4.6 Initial insulation resistance . 15
5.4.7 Input to output d.c. resistance . 15
5.4.8 Input to output d.c. resistance unbalance . 15
5.4.9 Transfer impedance . 16
5.5 Transmission characteristics . 16
5.5.1 General . 16
5.5.2 Insertion loss (IL) . 16
5.5.3 Return loss (RL) . 16
5.5.4 Near end cross talk (NEXT) . 16
5.5.5 Far end cross talk (FEXT) . 16
5.5.6 Transverse conversion loss (TCL) . 17
5.5.7 Transverse conversion transfer loss (TCTL) . 17
5.5.8 Propagation delay . 17
5.5.9 Delay skew . 17
5.6 Mechanical characteristics . 17
5.6.1 Mechanical operation . 17
5.6.2 Insertion and withdrawal forces . 17
6 Tests and test schedule . 17
6.1 General . 17
6.2 Arrangement for contact resistance measurement . 18
6.3 Arrangement for vibration test (test phase EP5), see Figure 8. 19
6.4 Test procedures and measuring methods . 20
6.5 Preconditioning . 20
6.6 Test schedules . 20
6.6.1 Basic (minimum) test schedule . 20

6.6.2 Full test schedule . 20

Figure 1 – Contact interface dimensions with terminated free connector . 9
Figure 2 – View of contact zone . 10
Figure 3 – View of contact zone section A-A . 11
Figure 4 – Free connector view . 12
Figure 5 – Fixed connector pin and pair grouping assignment (front view of connector) . 13
Figure 6 – Connector de-rating curve . 15
Figure 7 – Arrangement for contact resistance measurement . 18
Figure 8 – Arrangement for vibration test . 19

Table 1 – Climatic categories – selected values . 13
Table 2 – Creepage and clearance distances . 14
Table 3 – Test group P – Preliminary . 21
Table 4 – Test group AP – Mechanical endurance . 22
Table 5 – Test group BP – Climatic . 23
Table 6 – Test group CP – Corrosion . 24
Table 7 – Test group DP – Moisture . 25
Table 8 – Test group EP – Dynamic stress. 26
Table 9 – Test group FP – Latch and cable stress . 27
Table 10 – Test group GP – Signal integrity . 28

– 4 – IEC 62946-02:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –

Part 02: Detail specification for 8-way, unshielded, free and
fixed high density connectors for data transmission with frequencies
up to 250 MHz and with current carrying capacity up to 1 A

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.
International Standard IEC 62946-02 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/2537/FDIS 48B/2546/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 62946 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 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.
The contents of the corrigendum of March 2020 have been included in this copy.

– 6 – IEC 62946-02:2017 © 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 this specification.
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 grant licenses with applicants
throughout the world on a non-discriminatory basis and on reasonable terms and conditions. In this
respect, the statement of the holder of this patent is registered with the IEC.
Information may be obtained from:
TE Connectivity Ltd.,
Shanghai HQ,
No 1528 Gumei Road,
Caohejing, 200233,
Shanghai, China.
Telephone [phone].
Email: [e-mail]
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.
ISO (www.iso.org/patents) and IEC (http://patents.iec.ch) maintain on-line data bases of
patents relevant to their standards. Users are encouraged to consult the data bases for the
most up to date information concerning patents.

IEC 62946-02, Ed. 1
(date of issue)
Subcommittee 48B: Electrical connectors
8-way, unshielded, free and fixed high
density connectors for data transmission
up to 250 MHz and with current carrying
capacity up to 1 A.
IEC
Fixed connectors are mounted on printed
circuit board, the free connector is
attached to wires.
– 8 – IEC 62946-02:2017 © IEC 2017
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –

Part 02: Detail specification for 8-way, unshielded, free and
fixed high density connectors for data transmission with frequencies
up to 250 MHz and with current carrying capacity up to 1 A

1 Scope
This part of IEC 62946 covers 8-way, unshielded free and fixed high density connectors for
data transmission with frequencies up to 250 MHz and with extra low voltage current carrying
capabilities up to 1 A, and is intended to specify the common dimensions, mechanical,
electrical, signal integrity and environmental characteristics and tests for these 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 60512 (all parts), Connectors for electronic equipment – Tests and measurements
IEC 60512-1, Connectors for electronic equipment – Tests and measurements – Part 1:
General
IEC 60512-1-100, Connectors for electronic equipment – Tests and measurements –
Part 1-100: General – Applicable publications
IEC 60512-11-7, Connectors for electronic equipment – Tests and measurements – Part 11-7:
Climatic tests – Test 11g: Flowing mixed gas corrosion test
IEC 60512-26-100, 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 61984, Connectors – Safety requirements and tests
ISO/IEC 11801, Information technology – Generic cabling for customer premises
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-581,
IEC 60512-1 and 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
interoperability
interoperability of connectors to this standard from different sources is ensured by compliance
with the specified interface dimensions
4 Common features and typical connector pair
4.1 Mating information
4.1.1 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 4 and Tables 1 to 3 as long as the
dimensions specified are not changed.
4.1.2 Contacts – mating conditions
IEC
Letter Minimum Nominal (ref.) Maximum
mm ° mm
A1 2,00 2,50
A2 1,82 1,98
B2 30°
P1 0,19 0,21
P2 0,38 0,51
Key
1 Female contact of fixed connector. The mating information shown can only be achieved when a free connector
is mated with a fixed connector, see the cross-section on the right, taken at the center of two opposite contacts.
2 Burrs shall not project above the top of the contact in this area, since it may be a contact area.
Figure 1 – Contact interface dimensions with terminated free connector

– 10 – IEC 62946-02:2017 © IEC 2017
4.1.3 Fixed connector
IEC
Letter Minimum Nominal (ref.) Maximum
mm mm or ° mm
B1 3,75 3,85
C1 2,72 2,78
D1 1,72 1,78
E1 1,25 1,35
F1 4,55 4,61
G1 5,77 5,83
H1 7,45 7,50
J1 1
K1 1,45 1,55
L1 2,00 2,10
M1 3,35 3,45
Q1 5,85 5,95
Key
1 Contact zone. Contacts shall be completely within their individual contact zone in the area indicated.
2 Section A-A: see Figure 3.
Figure 2 – View of contact zone

IEC
Letter Minimum Nominal (ref.) Maximum
mm mm or ° mm
S1 8,75 8,85
T1 8,50 8,60
W1 6,95 7,05
AB1 0,25 × 45°
AC1 1,62 1,78
AD1 1,13
AE1 6,25 6,35
AF1 3,95 4,05
AH1 7,01 7,11
AM1 4,95 5,05
Key
1 Preferred free connector stop.
2 This surface needs not be planar or coincident with the surface below the locking device as long as insertion,
latching and unlatching of free connectors is not inhibited.
3 Projections beyond AH1 dimension shall not prevent finger access to the free connector locking device.

All internal corners in the connector cavity shall be 0,38 mm radius maximum unless otherwise specified.
F
...