On 04/06/2020 11:43 AM, Peter C. Wallace wrote:
The general problem with Tin connectors is that they have
a positive feedback failure mechanism if used anywhere
near their current limits, their contact resistance rises
over time and heat exposure and the higher the resistance,
the high the temperature and the faster this degradation
progresses...
Even worse is intermittent usage in a humid environment.
The tin oxidizes, grows whiskers and
just generally degrades in humid conditions. Then, when you
try to pull a lot of current, you
get a high resistance contact.
Jon
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