For my design have Max current rating is 250A, so which is the best option by increasing copper thickness or increasing copper stack-up layer, is there any Price table available for copper thickness (no information in quote page for >2oz thickness)
Hello
if you check this page, We have specified outer layer and inner layer copper oz.
https://www.protoexpress.com/products/rigid-pcb/
Since it is a high current board. and your requirements are 250A. assuming your application to be LED or Motor driver something like this.
Both option are possible. if you go with increasing the stackup layers you can distribute the current by using parallel traces and via stitching techniques to distribute the current across multiple layers thus reducing trace width and thickness requirements. this ways you can reduce the requirement of higher copper oz in individual layers.
Please consider board heat dissipation requirements, you may have to go to metal core depending is how much heat dissipation you may need.
It depends on your application requirements, board area, density of components, rework and Cost factor
We can provide a custom solution for your problem, request for custom request with you copper requriements we can provide you stackup fit for application,
ask stackup for both the case scenario, and check with account manager he can give you custom quote for your solution.
check our tool for trace width and current calculation
https://www.protoexpress.com/tools/trace-width-and-current-capacity-calculator/
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Thanks for quick response, i will workout for Layer stackup with Current and Heat dissipation factors.
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For 250 amps I would absolutely look at Bus Bars first.
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Hello
We tried understanding your requirements. If you can give more information about the requirements we could help in detail.
There are some basic queries like, whats the voltage, what the max current, is 250A is continuous current?
As we ran some calculation for the 6oz to 20 oz, the trace width requirements is 6inch to 20 inch.
So we feel metal core will be best suitable option, and you can also look for option of bus bar suggested by Allan
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your 2 solution suggestions for 250 Amper PCB are not reasonable due to Heat Dissipation and Manufacturing costs for multi-Onze Copper.
The Metalcore solution is not good for 250 Amper since metalcore like Copper-Invar-Copper contains only 25% Copper.
my solution is moving it from Manufacturing to Assembly by Using Bus-Bars
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Try having a look at the Wurth Electronik “Redcube” products and especially their applications notes. The link below shows you some of the terminals they supply to connect up to 320A into (or out of) a PCB.
These guys should hopefully be able to advise on the best ways of handling very high currents in real manufacturable PCBs.