Relay board - 2 oz copper?

Forum 2005-2010 (read only) Hardware Development
1

I'm putting together a design for a relay board, and I'm debating whether I'm being generous enough with the traces on the contacts. I plan to use Omron G5Q relays. The traces are currently 76 mil. Would 2 oz copper be thick enough for this application, or should I go higher? I'm assuming 1 oz wouldn't be a good idea at all.

Also, if anyone could post a link to reference material on required trace widths/weights for a given current I'd appreciate it.

Thanks.

2

It depends on how much current you plan to carry.

This may help:

http://circuitcalculator.com/wordpress/2006/01/31/pcb-trace-width-calculator/

-j

3

It's going to be for reasonably low current applications (definitely under 3 Amps), so it looks like I can keep it at 2 oz.

Thanks for the link, that's a really helpful calculator.