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PCB current capacity

Discussion in 'Electronic Basics' started by Rodney Davies, Aug 9, 2008.

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  1. Can someone tell me how much current a 1mm wide trace on a PCB can handle?

  2. Jeff Higgins

    Jeff Higgins Guest

    Not certain about 1mm wide trace but maybe these will help.

    Google search : pcb+current+capacity leads to:

    which leads to:
    WikiBooks Practical Electronics/PCB Layout/Trace Current Capacity

    PCB Trace Width Calculator
  3. Jeff Higgins

    Jeff Higgins Guest

    which leads to:


    Shortcomings of the IPC-2221 Current Capacity Guidelines

    New Correlations Between Electrical Current
    and Temperature Rise in PCB Traces (t341.pdf)

    and on, and ...
    Sorry, I'm done now, just got interested.
  4. Thanks. Got what I needed.


  5. neon


    Oct 21, 2006
    have you considered the depth? then is the quality of of the board itself. it is a valid question but inpossible to answer .
  6. Eeyore

    Eeyore Guest

    There are various online calculators, just use Google imaginatively. There is
    no fixed figure, it depends on the temperature you you can accept.

  7. Eeyore

    Eeyore Guest

    Not an advisable method at all.

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