Heat-resistant 3-layer plating｜Products information｜Copper & Copper Alloy Products MITSUBISHI MATERIALS

Heat-resistant 3-layer plating

Plating

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Main applications

Heat-resistant 3-layer plating is ideal for use on connector terminal materials and bus bars for use in high-voltage for electric vehicles (EVs), engine compartments in conventional automobiles, and other applications where heat resistance is required.
It can also be used as an alternative in places where conventionally precious metal plating would have been used.

plate
strip
bar
wire
ball

Heat-resistant 3-layer plating possesses the same level of good reliability for electrical connections as Conventional plating and also enables use in higher temperature environments.
Application of this plating in places requiring temperature resistance, where conventionally precious metal plating would have been used, can be expected to lower costs.

Positioning map

Main features

Sn still remains even under high-temperature conditions, maintaining good reliability for electrical connections.
Heat-resistant 3-layer plating is lower costs than precious metal plating such as gold and silver.

Conventional plating

Cu disperses from substrate, Sn forms an alloy
⇒Heat-resistance is degraded

Heat-resistant 3-layer plating,
Enhanced heat-resistant 3-layer plating

Ni layer suppresses dispersal of Cu, Sn survives
⇒Heat-resistance is maintained

Technical Data

Heat resistance

Heat-resistant 3-layer plating maintains good reliability for electrical connections even under high-temperature conditions where conventional plating could not be applied.