All-knowing TechNet,

Yesterday I rejected some assemblies that had wires crimped into lugs and
attached to a TO-3 case. The inspector had noticed that the wires were also
tinned and then had been crimped. I said to rework based on the knowledge that
we had never tinned wires to be crimped.

But when pressed for the reasons behind my decision, I was stumbling for an
answer. All I could come up with is that perhaps the crimp would be less
crimplified (new word) over time due to solder creep or temperature excursions
since the solder might reflow to some degree.

What is the reason or doesn't it really matter whether tinned or not?

Did this Quality lug crimp his position as the local answer man?

Thanks to the forum,

Stu Korringa
Quality Engineer
Smiths Industries Electronic Systems
Grand Rapids, Mi.


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