[SI-LIST] Re: current in a 12 mil via.
- From: Ray Anderson <Raymond.Anderson@xxxxxxx>
- To: Mike_Nguyen@xxxxxxxxxxxxxxxxx
- Date: Wed, 14 May 2003 13:02:41 -0700 (PDT)
Someone locally asked a similar question of me just yesterday. In response
I found a spreadsheet based via current capability calculator on the web
at the following URL:
www.pcbstandards.com/downloads/Metric%20Environment/
Calculators/Via%20Current/Via%20Current.xls
In playing around with it I found that it gives intuitively
correct answers haven't done a real sanity check on the answers
so can't vouch for it one way or another.
A 12 mil via connecting to 1 oz copper trace gives the following
results in the spreadsheet:
Allowable temp rise Current
----------------------------- ----------
10 degree C rise above ambient .984 amps
20 degree C rise above ambient 1.334 amps
30 degree C rise above ambient 1.595 amps
40 degree C rise above ambient 1.810 amps
If anyone sees a problem with the spreadsheet's calculations I'd like to
hear about them. The author of the sheet admits he hasn't done rigourous
verification.....
-Ray
>
>Hi everyone,
>
>Where can I find information about current-carrying capacity of a via at
>different temperatures?
>
>Thanks,
>Mike N.
>
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