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Re: Potential heating problem with standard patch Cat5 panels



Title: RE: Potential heating problem with standard patch Cat5 panels
We have seen Cat5E patch panels (from a vendor who shall remain nameless) blow traces at about 250ma.  Some vendors use very thin traces indeed.
----- Original Message -----
Sent: Friday, May 04, 2001 6:58 AM
Subject: RE: Potential heating problem with standard patch Cat5 panels

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 >>