Since most fab notes specify a minimum hole wall thickness of 1 mil
continuous, calculate the current handling ability of a trace with a width
equal to the diameter of the hole and a thickness of 1mil,
Then multiply by 3.141592654

A calculator can be found at: http://www.ultracad.com/calc.htm
<http://www.ultracad.com/calc.htm>
Or online at http://www.geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm
<http://www.geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm>




                -----Original Message-----
                From:   Rose, Steve M [mailto:[log in to unmask]]
                Sent:   Tuesday, May 25, 1999 5:40 AM
                Subject:        Through-hole current calculator?

                How much current can that via safely handle?  What are the
effects over temperature?  Area and plating considerations?

                A current calculator of sort would help simplify a bit.

                Thanks,

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