This site has some PCB related calculators

http://www.ultracad.com/calc.htm

PCBTemp.exe, which looks at the relationship between trace current,
geometry, and temperature rise of PCB traces

Hope this helps,
Paul

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Edson Brusque (listas)
> Sent: Thursday, June 13, 2002 4:08 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: PCB traces "amperage"
>
>
> Hello,
>
>     I'm trying to found how much current can I push on a PCB
> trace, but the
> people that manufactures PCB for me are a little weak on
> technical specs. :(
>
>     There's a formula to calculate how much current a PCB trace suports?
> There's common figures?
>
>     Best regards,
>
>     Brusque
>
> -----------------------------------------------------------------
> Edson Brusque                 C.I.Tronics Lighting Designers Ltda
> Research and Development               Blumenau  -  SC  -  Brazil
> Say NO to HTML mail                          www.citronics.com.br
> -----------------------------------------------------------------
>
>

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