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PCB板中线宽与电流的关系.doc


 

Trace Carrying Caity
per mil std 275

Temp Rise

10 C

20 C

30 C

Copper

1/2 oz.
1 oz.
2 oz.
1/2 oz.
1 oz.
2 oz.
1/2 oz.
1 oz.
2 oz.

Trace Width

Maximum Current Amps

.010
.5
1.0
1.4
0.6
1.2
1.6
.7
1.5
2.2
.015
.7
1.2
1.6
0.8
1.3
2.4
1.0
1.6
3.0
.020
.7
1.3
2.1
1.0
1.7
3.0
1.2
2.4
3.6
.025
.9
1.7
2.5
1.2
2.2
3.3
1.5
2.8
4.0
.030
1.1
1.9
3.0
1.4
2.5
4.0
1.7
3.2
5.0
.050
1.5
2.6
4.0
2.0
3.6
6.0
2.6
4.4
7.3
.075
2.0
3.5
5.7
2.8
4.5
7.8
3.5
6.0
10.0
.100
2.6
4.2
6.9
3.5
6.0
9.9
4.3
7.5
12.5
.200
4.2
7.0
11.5
6.0
10.0
11.0
7.5
13.0
20.5
.250
5.0
8.3
12.3
7.2
12.3
20.0
9.0
15.0
24.5
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