Overview
ISO 15170-1:2001 defines the dimensions and classes of application for four-pole electrical connectors with pins and a twist‑lock coupling used on road vehicles. The standard ensures mechanical and electrical interchangeability of both parts of a connector pair for truck, bus and trailer applications (including components directly mounted on the engine). It covers connector geometry, pole coding, contact details and class designations needed to guarantee fit and basic application suitability.
Key topics and technical requirements
- Connector types and dimensions
- Specifies fixed (Type A) and free/coupler (Type B) connector dimensional layouts (figures define exact dimensions).
- Manufacturers may choose unspecified detail such as sealing and cable retention within given limits.
- Classes of application
- Defines classes K1, K2 and K3 with required contact plating and environmental limits:
- K1: Sn plated, contact temperature range −40 °C to +120 °C, max acceleration 200 m/s²
- K2: Sn plated, −40 °C to +120 °C, max acceleration 300 m/s²
- K3: Ag plated, −40 °C to +140 °C, max acceleration 300 m/s² (higher temperatures by agreement)
- Contacts and crimp sizes
- Contact plating indicated by chemical symbol (Sn, Ag). Mated contacts must have the same plating.
- Crimp size coding: code 1 = 0.5 to 1 mm², code 2 = >1 to 2.5 mm².
- Contacts must conform to ISO 8092-4.
- Pole arrangements and coding
- Provides coding table for 2, 3 and 4‑pole arrangements with preferred variants.
- Mechanical and colour coding options (e.g., black, grey, green, blue) to avoid mis-mating.
- Pole allocation examples for common vehicle components (solenoid valves, pressure sensors, ABS valves) are given.
- Performance
- Connectors are required to meet performance and test criteria specified in ISO 15170-2.
Practical applications
- Ensures reliable, interchangeable electrical connections for:
- Engine‑mounted sensors and actuators (pressure switches, speed sensors, solenoid valves)
- ABS and braking system components on trucks, buses and trailers
- Wiring harness connectors where robust twist‑lock mating is needed under vibration and temperature stress
- Useful for specifying connector parts in vehicle design, spare parts procurement, and repair/maintenance procedures.
Who should use this standard
- Automotive OEMs and Tier‑1 component suppliers
- Wiring‑harness manufacturers and crimping tool suppliers
- Fleet operators, maintenance engineers and test laboratories specifying or verifying connector compatibility
Related standards
- ISO 15170-2:2001 - Tests and requirements (performance verification)
- ISO 8092-4:1997 - Pins for single- and multi‑pole connections (dimensions and requirements)
Keywords: ISO 15170-1, four‑pole electrical connectors, twist lock, road vehicles, connector dimensions, connector classes, crimp sizes, contact plating, truck bus trailer.