Sumitomo Electric Industries – Aluminium Wire Harness
Usually wiring harness employs copper wires for their excellent conductivity.*1 To reduce vehicle weight, however, the Sumitomo Electric Group developed aluminum alloy wires, which have equivalent conductivity to copper wires at a half weight, and started sales of the aluminum wiring harness in 2010. However, the aluminum alloy wires developed at that time had poor vibration resistance in comparison with conventional copper wires, thus limiting application to the interior and instrument panel*2 wiring.
The development continued and in 2015, by exploiting the technology within the Group, new high-strength aluminum alloy wires, which exceed the strength of conventional copper wires, were successfully developed. The development has expanded the use of aluminum alloy wires to applications involving more severe vibration, such as engine harness.
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