ISO 19072-1:2019

Road vehicles - Connection interface for pyrotechnic devices, two-way and three-way connections - Part 1: Pocket interface definition

This document defines the minimum specification of the pyrotechnic device pocket interface.

Véhicules routiers — Interface de raccordement pour dispositifs pyrotechniques, deux voies et trois voies — Partie 1: Définition de l'interface du support allumeur

General Information

• Status: Published
• Publication Date: 28-Jul-2019
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 6 - On-board electrical connections
• Current Stage: 9092 - International Standard to be revised
• Start Date: 25-Jan-2024
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 19072-1:2014 - Road vehicles - Connection interface for pyrotechnic devices, two-way and three-way connections - Part 1: Pocket interface definition
• Effective Date: 23-Jul-2016

Overview

ISO 19072-1:2019 specifies the minimum pocket interface for pyrotechnic devices used in road vehicles (two-way and three-way connections). Commonly referenced as the pyrotechnic device pocket interface or squib holder interface, this Part 1 document defines dimensional geometry, contact features and material/finish requirements to ensure consistent mating between initiators (squibs) and harness connector assemblies across suppliers and OEMs.

Key topics and technical requirements

• Scope: Minimum specification of the pyrotechnic device pocket interface (squib holder inner interface including male contacts).
• Dimensional features: Detailed pocket geometry, anti-rotation features, undercut requirements and mating clearances are defined (including maximum contact point and minimum female contact overlap of 1 mm).
• Male contacts:
  • Must be manufactured of solid material (not folded or hollow).
  • Plating requirements: comply with ASTM B488 (min. type II, code C; coating thickness class ≥ 0.5 to be agreed between parties).
  • Nickel underlayer: per ASTM B689 (type I or II; class ≥ 2).
  • Porosity: per ASTM B735, max 2 pores/mm; pores counted when diameter X > 0.05 mm.
  • Surface roughness: Ra 0.4 µm per ISO 1302.
  • Plating must extend to the tip of the pin and contact/short-circuit areas are specified.
• Retainer and shorting clip: Definitions and optional shorting (shunt) are included; retainer provides coding and insulation where used. Variant without retainer is covered.
• Sealed variant (Annex A): Details space and surfaces reserved for sealing between squib holder and connector.
• Variant without retainer (Annex B) and alternative material/undercut geometry (Annex C): provide optional designs and retention geometry for different manufacturing approaches.
• Normative references: ISO 1302, ISO 8092-2 and ASTM standards referenced for testing, finishes and tolerances.

Practical applications and users

ISO 19072-1 is used by:

• Automotive OEMs and Tier‑1/Tier‑2 suppliers to standardize pyrotechnic device interfaces across models and suppliers.
• Harness and connector manufacturers specifying male/female contact geometry and plating.
• Component designers and tooling engineers developing squib holders, initiators and retainers.
• Safety engineers and certification/test labs verifying interface conformity and durability. Practical benefits include interchangeability, reduced tooling variation, improved reliability of airbag and restraint system initiators, and clearer supplier‑OEM specifications.

Related standards

• ISO 19072-2: Test methods and general performance requirements.
• ISO 19072-4: Pyrotechnic device and harness connector assembly - type 2.
• ISO/TS 19072-5: Pyrotechnic device and harness connector assembly - type 3 (two-way).
• Referenced test/finish standards: ASTM B488, ASTM B689, ASTM B735, ISO 1302, ISO 8092-2.

Keywords: ISO 19072-1, pyrotechnic device pocket interface, squib holder, male contacts, initiator, contact plating, road vehicles, connector assembly.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19072-1
Third edition
2019-08
Road vehicles — Connection interface
for pyrotechnic devices, two-way and
three-way connections —
Part 1:
Pocket interface definition
Véhicules routiers — Interface de raccordement pour dispositifs
pyrotechniques, deux voies et trois voies —
Partie 1: Définition de l'interface du support allumeur
Reference number
©
ISO 2019
© ISO 2019
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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 Dimensional features — Squib holder interface including male contacts .2
5 Material characteristics . 4
5.1 Material specifications for male contacts . 4
5.2 Contacts and short circuit areas of the male contacts specifications . 4
Annex A (normative) Sealed variant of the pyrotechnic device/initiator harness connector
assembly . 5
Annex B (normative) Variant without retainer of the pyrotechnic device/initiator harness
connector assembly . 6
Annex C (normative) Undercut geometry for the alternative material of the pyrotechnic
device/initiator harness connector assembly . 7
Bibliography . 8
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 19072-1:2014), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— greater detail has been specified in 5.2 regarding the contacts and short circuit areas for the male
contacts;
— Annex C has been added to define an alternative material variant of the pyrotechnic device/initiator
harness connector assembly.
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 bag, safety belt pretensioner, etc.).
Various pocket definitions currently exist all over the world. This situation appears difficult to manage
for the different equipment makers. The goal of this document is to define a common specification.
A sealed option of the pyrotechnic device/initiator harness connector assembly is defined in Annex A.
A variant without retainer of the pyrotechnic device/initiator harness connector assembly is defined in
Annex B.
An alternative material variant of the pyrotechnic device/initiator harness connector assembly is
defined in Annex C.
INTERNATIONAL STANDARD ISO 19072-1:2019(E)
Road vehicles — Connection interface for pyrotechnic
devices, two-way and three-way connections —
Part 1:
Pocket interface definition
1 Scope
This document defines the minimum speci
...