TECHNET Archives

February 2000

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Spann, Phillip J (S3)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 17 Feb 2000 12:30:26 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (61 lines)
Jong,

    The amount of time the PCB will see 20-30 amps plays a role in copper
used
and trace size.  If the board will see this current all of the time, FR4
will
probally not handle it.  We are currntly running a 25 amp power board using
2oz. copper on outer layers that is plated up to 3oz. and then tin-lead
reflowed.
The trace size is a minimum of .325". This PCB only switches 25 amps on for
about
10 seconds at a time.  Check out www.ultracad.com for a trace width
calculator
based on IPC-D-275 charts and also an article Mr. Brooks wrote on "melting
traces".
Best of luck!

-----Original Message-----
From: jong s kadesch [mailto:[log in to unmask]]
Sent: Thursday, February 17, 2000 11:34 AM
To: [log in to unmask]
Subject: [TN] copper weight


Hi Technetters,

What is the max. copper weight I can get on the outer layers of the board
with the current of 20 to 30A?  I'm fairly new to with high current board.
Thanks in advance.

Jong Kadesch

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2