There is a neatly presented collection of information on trace width at: http://www.ultracad.com/trace.htm You will find a link to a freeware calculator for the PC on the same page. Note that there is also a paper discussing PCB temperature rise at: http://www.ultracad.com/pcbtemp.pdf At 10:34 AM 12/27/02 -0800, you wrote: >Hello all, > >A real simple question: > > "How much current can a 5 mil copper trace carry?" > >I've gone through my books and I can't find how to calculate >the max. snip ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu