Minimum Trace Width

As a general rule of thumb, the minimum Route Trace Width is 1.0 mm/A.

For a 1.0 oz/ft2 of copper thickness which is commonly applied on most applications.

But if the parameters change, Used a PCB Trace Width Calculator to achieved a trace width that can handle a certain amount of current.


recommended site:
http://circuitcalculator.com/wordpress/2006/01/31/pcb-trace-width-calculator/
http://www.mcuexamples.com/PCB-Trace-width-calculator.php

it requires several parameters, including the operating temp range, maximum current which will flow through the trace, copper thickness, etc.

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