Overview
ISO/TS 19072-5:2019 specifies the minimum requirements for a type 3 two‑way connection interface between a pyrotechnic device (initiator) and a vehicle harness connector. Part of the ISO 19072 series for road vehicles, this technical specification covers the physical interface, retainer and squib holder assembly, coding/polarisation, and material characteristics needed to ensure safe, interchangeable mating of pyrotechnic safety devices (for example airbag initiators and seatbelt pre‑tensioners) with wiring harnesses.
Key Topics and Technical Requirements
- Scope: Defines general minimum specifications for the type 3 two‑way connector interface linking pyrotechnic device and harness connector.
- Connector design: Female connector shall be scoop‑proof to avoid damage to male contacts and the initiator on improper mating.
- Retainer and squib holder: Dimensional features and assembly geometry are defined (see figures referenced in the specification) to ensure correct retention and compatibility with the igniter pocket described in ISO 19072‑1.
- Retention performance: Retainer must provide a minimum retention force of 135 N when mated to the ignitor; geometry must allow appropriate insertion force consistent with assembly processes.
- Durability: Connector mating operation has a minimum of 20 operation cycles.
- Coding & polarisation: Physical coding keys provide polarisation; each coding position is assigned a colour code (RAL system) to prevent cross‑mating. Colour options for 2‑way connections include RAL‑similar: 3015 (pink), 4005 (purple), 7036 (grey), 6018 (green). Specific RAL ranges are to be agreed between customer and supplier.
- Material properties: Plastic used for the retainer shall have a modulus of elasticity ≥ 4 500 MPa, tested per ISO 178.
- Reference drawings and dimensions: Several figures in the document illustrate retainer dimensions, mating orientation, and coding key positions; non‑dimensioned features are not part of the interface.
Applications
- Ensures interchangeability of pyrotechnic initiators and harness connectors across suppliers.
- Supports vehicle safety system integration - airbag modules, belt pretensioners and other pyrotechnic devices.
- Guides connector design, testing, and assembly practices to meet minimum safety and mechanical performance.
- Useful for manufacturing, quality control and compliance during harness assembly and ECU integration.
Who Should Use This Standard
- Automotive OEMs and Tier‑1 harness suppliers
- Pyrotechnic device and connector manufacturers
- Design engineers, test laboratories and compliance managers working on vehicle passive safety systems
Related Standards
- ISO 19072‑1: Pocket interface definition (compatibility with squib holder)
- ISO 19072‑2: Test methods and general performance requirements
- ISO 8092‑2: Connections for on‑board wiring harnesses - definitions and test methods
- ISO 178: Plastics - determination of flexural properties (for retainer modulus)
Keywords: ISO/TS 19072-5:2019, road vehicles, pyrotechnic devices, connector interface, harness connector, retainer, squib holder, initiator, connector standards.