Hey all-

        We got some surface mount connectors in that have a white, powdery, dull
appearance to them.  The soldering results were not real good.  After some
research, the supplier says that the parts are tinned with a 93 tin/ 7 lead
alloy.  Seems to me, with that high a percentage of tin, tin oxidation would
be a problem.  He claims that they have made millions with no reported
problem.  Is this a standard lead finish?  Could oxidation be a problem with
that alloy, or is that enough lead to stop oxidation?  We need too much
volume to dip them ourselves before assembly.  The supplier won't dip them.
Thanks for any input.

-Ryan Jennens
TelGen Corporation
(517) 887-6666 x151

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