ISO 19072-2:2019

INTERNATIONAL ISO
STANDARD 19072-2
Third edition
2019-12
Road vehicles — Connection interface
for pyrotechnic devices, two-way and
three-way connections —
Part 2:
Test methods and general
performance requirements
Véhicules routiers — Interface de raccordement pour dispositifs
pyrotechniques, deux voies et trois voies —
Partie 2: Méthodes d'essai et exigences des performances générales
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Functional characteristics of mated connectors . 2
4.1 General . 2
4.2 Visual examination . 2
4.3 Mating and unmating . 2
4.4 Resistance to tensile and compressive force between the connector and squib
holder equipped with initiator and retainer . 3
4.4.1 Test . 3
4.4.2 Requirements . 4
4.5 Mechanical strength of the retainer in the squib holder . 5
4.5.1 Test . 5
4.5.2 Requirements . 5
4.6 Combination of temperature/humidity/vibration . 6
4.6.1 Test . 6
4.6.2 Requirements . 8
4.7 Coding . 9
4.7.1 Test . 9
4.7.2 Requirements . 9
4.8 Polarisation . 9
4.8.1 Test . 9
4.8.2 Requirements . 9
4.9 Contact resistance (voltage drop), millivolt test . 9
4.9.1 Test . 9
4.9.2 Requirements .11
4.10 Insulation resistance .11
4.11 Withstand voltage .11
4.12 Thermal ageing .11
4.13 Opening and closing of the short-circuit .11
4.14 Short-circuit resistance .12
4.14.1 Test .12
4.14.2 Requirements .13
4.15 Rapid change of temperature (thermal shock) .13
4.16 Chemical fluids .13
5 Test sequences .13
Annex A (normative) Sealed variant of the pyrotechnic device/initiator harness connector
assembly .15
Annex B (normative) Two-way (without ground) variant of the pyrotechnic device/initiator
harness connector assembly .17
Annex C (normative) Variant without retainer of the pyrotechnic device/initiator harness
connector assembly .19
Bibliography .20
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This third edition cancels and replaces the second edition (ISO 19072-2:2013), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— 4.4.2.1 Table 1, force and torque requirements for straight connectors;
— 4.4.2.2 Table 2, force and torque requirements for right angle connectors;
— 4.9.1.2 Figure 8 including key, signal contact resistance;
— 4.9.2.1 Table 5, maximum signal contact resistance;
— 4.9.2.2 Table 6, maximum contact resistance between ground and squib holder.
A list of all parts in the ISO 19072 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved

Introduction
Road vehicles integrate an increasing number of pyrotechnic devices contributing to occupant safety in
vehicles (for example, frontal and side air bags, safety belt pretensioner, etc.).
To build the complete system providing the function requires a supply of various components from
several different equipment makers. Vehicle manufacturers need to define a common specification
to ensure that connectors designed and produced by the various equipment makers meet the same
performance criteria and requirements.
In the current design of this vehicle equipment, three areas of connection have been identified:
— between the pyrotechnic device (e.g. initiator) and the harness connector;
— between the tab holder and the clip holder of the harness connector;
— between the harness connector and the electronic control module.
The connection between the pyrotechnic device and the harness connector is the only connection that
can be standardized and forms the subject of this document. Due to the location of the safety device in
the vehicle, the connector design could be a right angle or straight.
A sealed variant of the pyrotechnic device/initiator harness connector assembly is defined in Annex A.
INTERNATIONAL STANDARD ISO 19072-2:2019(E)
Road vehicles — Connection interface for pyrotechnic
devices, two-way and three-way connections —
Part 2:
Test methods and general performance requirements
1 Scope
This document specifies the performance criteria and requirements of a three-way connection
interface, including ground connection, linking the pyrotechnic device and harness connector built into
a road vehicle.
Performance criteria and requirements are defined for a sealed variant of the pyrotechnic device/
initiator harness connector assembly (see Annex A).
Performance criteria and requirements are defined for a two-way (without ground) variant of the
pyrotechnic device/initiator harness connector assembly (see Annex B).
Performance criteria and requirements are defined for a variant without a retainer of the pyrotechnic
dev
...