There is a web based calculator at http://www.pcb-designer.com in the PCB
Data section.  It is based on the GE nomographs that IPC uses in their
standards, and so are pretty conservative, but I have a reference section
that shows the formula if you want to "tweak" it.

--
George Patrick
Tektronix, Inc.
Central Engineering, PCB Design Group
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
Phone: 503-627-5272         Fax: 503-627-5587
http://www.tektronix.com <http://www.tektronix.com>
http://www.pcb-designer.com

It's my opinion, not Tektronix'




-----Original Message-----
From: Holmes Ben-CBH033 [mailto:[log in to unmask]]
Sent: Monday, April 21, 2003 6:02 AM
To: [log in to unmask]
Subject: [DC] Calculate trace width


Is there any way to calculate trace widths for high current 8-10 amps?
Current this high is off most of the charts that is usually used for
this reference.

Thanks,

Benjamin Holmes CID
Senior Substrate Designer
Motorola ESG IESS
Office: 770-338-3278
Fax:    847-761-1636
email: [log in to unmask]

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