Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


stranded copper wire - tin or not tinned

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#71625

stranded copper wire - tin or not tinned | 23 January, 2014

Should stranded copper wire (20 gauge 19 strand) be tinned prior to insertion into screw connector? One of our customers "suggests" tinned, but past experience tells us no.

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#71626

stranded copper wire - tin or not tinned | 23 January, 2014

Even for me its a No. Its quiet strange why some preferred tinned ones.

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#71630

stranded copper wire - tin or not tinned | 23 January, 2014

I agree with AFlex. Don't tin stranded wire that's assembled into a screw terminal block. I believe the reasoning has to do with avoiding stress on the wire metal caused by different expansion rates of the solder and the wire.

BR davef

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