PCB track thickness - Electronic Circuits Projects Diagrams Free

johnl69 · 23rd July 2007, 09:32 AM

How thick should a PCB copper track be for 240VAC and 400VDC?

ericgibbs · 23rd July 2007, 09:40 AM

Quote:

Originally Posted by johnl69

How thick should a PCB copper track be for 240VAC and 400VDC?

It really depends upon the current flowing thru the track, both thickness and track width.

johnl69 · 23rd July 2007, 09:59 AM

Quote:

Originally Posted by ericgibbs

It really depends upon the current flowing thru the track, both thickness and track width.

I should be less than 1amp

picasm · 23rd July 2007, 10:02 AM

There are a few calculators online and sometimes also built-in to pcb design software, here is an online one:
http://www.desmith.net/NMdS/Electronics/TraceWidth.html

Note that you need to know the thickness of the copper layer and must also allow plenty of clearance between tracks for high voltages to prevent immediate problems and also prevent "creepage" as the board ages,humidity etc.

ericgibbs · 23rd July 2007, 11:52 AM

Quote:

Originally Posted by johnl69

I should be less than 1amp

I agree with picasm, also I would use GF/epoxy pcb as the substrate, not SRBP.

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23rd July 2007, 09:32 AM	(permalink)
johnl69	PCB track thickness How thick should a PCB copper track be for 240VAC and 400VDC? Last edited by johnl69; 23rd July 2007 at 09:36 AM.

23rd July 2007, 10:02 AM	(permalink)
picasm	There are a few calculators online and sometimes also built-in to pcb design software, here is an online one: http://www.desmith.net/NMdS/Electronics/TraceWidth.html Note that you need to know the thickness of the copper layer and must also allow plenty of clearance between tracks for high voltages to prevent immediate problems and also prevent "creepage" as the board ages,humidity etc.