piclist 2000\05\30\062430a >
Thread: Current on a PCB
face BY : Mark Willis email (remove spam text)

IIRC on a 2Oz board, 10 mils will do for this;  Aaah.
http://www.aracnet.com/~gpatrick/ (from a post in the archives by Peter
Keller) - 5 mils will do you on a 1Oz board (1 mil = 0.001 inch, FWIW.)

Glenn Golden had, as raw numbers with no PCB copper thickness added,
> 0.010 INCH - 0.8A
> 0.015 INCH - 1.2A
> 0.020 INCH - 1.5A
> 0.025 INCH - 1.7A
> 0.050 INCH - 3.2A
> 0.100 INCH - 4.8A
> 0.150 INCH - 6.0A

Marcelo Puhl had,
{Quote hidden}

I have yet another set of similar numbers in my palmtop that I usually
refer to <G>

Be sure to degrade for middle layers of a 3+ layer PC board, BTW.

I usually go with 10+ mil traces, a little extra current capacity is not
a bad thing...  (When printing on a 300DPI laser, you want at least 3
pixels or so of width in the toner for clean continuous traces.
Probably can get away with 2, BUT, ...  12.5 mil traces on 25 mil
centers gives you about 2A peak, and about 300V insulation between
traces - better than I usually need for small boards.)


Andrew Seddon wrote:
> Could anybody tell me what the recommended minimum track widths are for
> different current values. A general case formula or rule of thumb would be
> great but specifically around 0.4-0.5 amps.
> Thanks.

<39339681.651FE2B8@foxinternet.net> 7bit

See also: www.piclist.com/techref/pcbs.htm?key=pcb
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