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Options for using tin plated terminals above the rated temperature?

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Q. Hello, I was wondering anything can be done to increase the operating temperature of a tin plated copper electrical terminal?

The tin seems to form an oxide above about 400 °F and is introducing significant contamination to the assembly. Unfortunately, this is a unique component and I am not easily able to find substitutions.

I was wondering if it's feasible to apply another finish with a higher service temperature over the tin, such as silver or nickel plating, but I've had difficultly researching this.

Any feedback is much appreciated, thank you.

Paul Rossi
- Milford, Connecticut
January 18, 2024


A. Hello Paul,

If your supplier cannot provide an alternative finish on these parts, probably best option is to strip the tin and replate with something that suits your requirements. Thread 33364 may be of interest particularly Mark Baker's reply.

J Tong
- Melbourne, Australia


A. You might consider tin-silver plating.
Andreas N.
Engineer - Bavaria, Germany
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