Author Topic: How to calculate trace resistance on a PCB?  (Read 1707 times)

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Offline FaringdonTopic starter

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How to calculate trace resistance on a PCB?
« on: June 16, 2022, 03:14:55 pm »
How do I measure the total track resistance in the mains AC input section of my 2kW offline SMPS, from  Mains AC connector up to diode bridge?
It’s a 4 layer board as attached, in  Eagle Pro 7.4.0 (1 oz copper)
Diode bridge is the two GBJ5010’s (two 4-in-line packages on the heatsinks)
« Last Edit: June 16, 2022, 03:18:36 pm by Faringdon »
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Offline ebastler

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Re: How to calculate trace resistance on a PCB?
« Reply #1 on: June 16, 2022, 04:02:33 pm »
The command "run length-freq-ri" will print a list of trace lengths, resistances, and frequency limits for each signal in your layout.

I believe this works for traces of varying width as well (but it's been a while since I used it.) The copper thickness is set in the Design Rules/Layers dialog, if I remember correctly.
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