Primary Wire – T4 (150°C)

All-around performer. TE's Raychem automotive composite wire (ACW) for engine harness applications is mechanically robust and provides smaller, lighter wires with high performance for fluid resistance.

Proven, high performance engine bay wire. Our Raychem T4 automotive composite wire (ACW) is 150° C rated, provides a class D thin-wall, is mechanically robust and has a composite wire for engine harness applications. This outer layer is bonded to a radiation cross-linked polyolefin. The unique bonding gives the additional benefit for improvements in the mechanical performance of the wire along with the capability to be terminated using recognized industry standards. The wires provide smaller, lighter and more flexible options, providing easy installation.

ACW dual layer bonded insulation technology.

Core Technologies

Technical Leadership in the Wire and Cable Industry

  • TE' Raychem is a pioneer of radiation cross-linking, and one of the leading supplier of such products worldwide.
  • All of TE's major product lines use insulation formulations developed in-house, and tailored to give optimum performance for each specific need.
  • When TE develops any new product, we test it well beyond the limits of international and OEM specifications, to ensure that it will not only exceed expectations in service, but will be as easy to process and install as possible.
  • TE employs state-of-the-art manufacturing techniques to ensure that consistent product quality is achieved. 
  • TE provides comprehensive handling guidelines with our products, and our expert technical support team is always on hand to respond to any technical queries that may arise.


Primary Wire – T4 (150°C)
  • Smaller, lighter more flexible wires – providing easier installation. 
  • Designed to be compatible with typical wire-handling equipment used in harness factories through the unique bonding of the two layers.
  • High level of compatibility with materials used in the harnessing process.
  • Thin-wall designs – providing improved handling and space savings and manufactured connector compatibility benefits.
  • Low friction characteristics – slides over bundles (resists blocking at high temperatures).


Primary Wire – T4 (150°C)
  • Continuous operating temperature from -40°C to +150°C (3000hrs)
  • Unique bonded composite wall insulation system
  • Robust, fluoropolymer outer jacket
  • 50 Volts thin-wall
  • Superior fluid resistance compared to cross-linked polyolefin
  • Compatible with all harness components
  • Designed to be compatible with all harness factory processes