
SIDACtor
Data Book
PCB Layout
Teccor Electronics
(972) 580-7777
5 - 13
T
+,
Overview
Because the interface portion of a PCB is subjected to high voltages and surge
currents, consideration should be given to the trace widths, trace separation, and
grounding.
Trace Widths
IPC-D- 275 specifies the trace widths required for various current carrying capacities.
This is very important for grounding conditions to insure the integrity of the trace during
a surge event. The required width is dependent on the amount of copper used for the
trace and the acceptable temperature rise which can be tolerated. Teccor recommends
a .025 inch trace width with 1oz. copper.
Figure 5-4 Current vs. Area
0
.125
.25
.50
1
2
3
4
5
8
7
12
10
0
1
10 20
100 150
300 400
500 600 700
Conductor Cross-Section Area (sq mils)
5
30 50 70
200 250
6
15
20
25
30
C
.75
1.5
10 C
20 C
30 C
35
45 C
60 C
75 C
Allowable
Temperature
Rise