Hi Roberto,
There is an international standard IEC 326-3 "Guide For the Design and
Use Of Printed Wiring Boards" which gives some guidelines and curves for
heat rise in copper traces.
If I'm reading the chart right for a 15 amp current, to get a temp rise
of 40ēC the trace needs to be 2.3mm wide and 105microns thick.
IPC-D-330 is also a design guide manual for PCB's. Does anyone have a
copy? If so are the recommendations of trace width and thickness the
same as above.
hope this helps
geoff layhe
www.lamar-uk.co.uk
> ----------
> From: Roberto Radaelli[SMTP:[log in to unmask]]
> Reply To: TechNet E-Mail Forum.;Roberto Radaelli
> Sent: 14 September 1999 09:29
> To: [log in to unmask]
> Subject: [TN] maximun current on pcb
> Importance: High
>
> hi..
>
> i want to know if there is a table or rules
> to determine the maximun current in a pcb trace
> on fr4 material with different thickness of the copper
>
> for example the width for a 15 amps with a tamb of 45 celsius
>
>
> thank's at all
>
> [log in to unmask]
> rancilio coffee machine s.p.a.
>
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