The Carrying Capacity of PCB

      The carrying capacity of PCB depends on the following factors: line width, line thickness (copper thickness), allowable temperature rise.

      As we all know, the wider the PCB trace, the greater the current carrying capacity.

      Assuming that under the same conditions, a 10 MIL line can withstand 1A, how much current can a 50MIL wire withstand? Is it 5A?

      The answer, of course, is no.Take a look at the following data from international authorities:

     The unit of line width：Inch（1inch=2.54cm=25.4mm）

     Data sources：MIL-STD-275 Printed Wiring for Electronic Equipment