Scott
     The horizontal axis represents the trace width by its thickness; in 
     your case a 10 degree rise for an external 0.25A carrying trace 
     equates to a 3.5 sq. mil cross section (5 mil width by 0.7 mil 
     thickness (for 0.5 oz))                                            MAC


______________________________ Reply Separator _________________________________
Subject: [DC] Current charts
Author:  PC [log in to unmask] at ~NP-INTERNET
Date:    3/19/98 5:28 PM


Please help, I cannot remember. In IPC-D-275, the current carrying 
charts, I have it on page 10 in case it has changed, I do not remember 
what the horizontal axis is in Figure 3-4b represents. Is it current for 
the wieght of copper?
     
I am trying to veryify the trace width for 200mA in .5oz copper external.
     
Thanks in advance for help a trivial question.
     
Scott
     
################################################################ 
DesignerCouncil E-Mail Forum 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 DesignerCouncil <your full name> 
To unsubscribe:   SIGNOFF DesignerCouncil 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional 
information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 
847-509-9700 ext.311
################################################################
     
     

################################################################
DesignerCouncil E-Mail Forum 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 DesignerCouncil <your full name>
To unsubscribe:   SIGNOFF DesignerCouncil 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################