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PCB tracks for high current application

Discussion in 'Electronic Basics' started by Prasad, Jul 21, 2004.

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  1. Prasad

    Prasad Guest


    I'm using PCB mountable ECO-PAC diode modules from Powersem for a
    rectification application where the current is about 180A rms. The
    size of my circuit limits the PCB size to about 35mm x 60mm. The
    length of each track is about 20-25mm. My PCB fabricator has
    recommended to use tracks of 150 micron thickness. I have designed my
    PCB such that most of the area is covered by the current track. Also,
    i have used a PTH, double-sided PCB.

    My doubt is:
    (1) Will my PCB carry the required 180A current.
    (2) If not, what changes can i make to my design (given the limited
    space available) to pass the 180A through the tracks.
    (3) Is there any thumb-rule or formula to calculate the track
    thickness for the required current.

    Any help will be appreciated.

    - Prasad.

  2. For answering these types of questions in my own designs I have found this
    PCB trace width calculator to be quite indispensable...
  3. Gordon Youd

    Gordon Youd Guest

    If the PCB cannot be made bigger try soldering copper wire along the tracks
    that are carrying the heavy current.

    As long as there are large lands where the module enters the PCB.

    Regards, Gordon.
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