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From my personal experience, a 12 degree C rise is trivial and would not cause any
PC board discoloration, unless the PC board was operated above 100 degree C.
Or the PC board material is faulty. I wonder if it is FR4.
If the patch panels are being damaged, there must be a whole lot more current involved than 350ma,
or the traces are very thin, or it has a different cause.
- Rick
-----Original Message-----
From: Jack Andresen [SMTP:jandresen@xxxxxxxxxx]
Sent: Thursday, May 03, 2001 2:21 PM
To: stds-802-3-pwrviamdi@xxxxxxxx
Subject: Potential heating problem with standard patch Cat5 panels
A customer mentioned panels burning up when one of his customers senr
power down the network.. I did some canculations and found a potential
problem.
Jack Andresen << File: DTE power.doc >>