Question

How much current can a PCB trace carry?

Answer 1

For power traces, a good rule of thumb is to calculate them at twice their expected maximum current. This will usually put them at 50 to 200 mils in DC circuitry, and anything larger than that should be run through a power plane.Aug 13, 2019

PCB Trace Width Tolerance Guidelines for Manufacturing - VSE

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According to MIL-STD-275, we are told that the maximum current a 50mil-trace can stand is 2.6amps. Nevertheless, the table above has been gradually replaced by IPC-2221 Generic Standard on Printed Board Design as a reference based on which a printed circuit board is accurately designed.