APPENDIX
177
Resistor Standards
Resistor Standards
Standard Tolerance
Standard
Tolerance
E6
20%
E48
2%
E12
10%
E96
1%
E24
5%
E192
0.5%
Standard Resistor Code
Standard resistors use colored bands to represent the value of the
resistor. To read 4-colored bands, the first two digits represent the
base value, the third is a multiplier and the last band is the
tolerance. For a 5-colored band, the first 3 digits represent the base
value, the 4
th
digit is the multiplier and the last digit is the tolerance.
Band color
Base digits
Multiplier
Tolerance
Black
0
10
0
-
Brown
1
10
1
±1%
Red
2
10
2
±2%
Orange
3
10
3
-
Yellow
4
10
4
-
Green
5
10
5
-
Blue
6
10
6
-
Violet
7
10
7
-
Grey
8
10
8
-
White
9
10
9
-
Silver
-
10
-2
±10%
Gold
-
10
-1
±5%
Example: 4 bands, Brown, Black, Black, Brown:
1
10 x 1, 1% = 10
Ω
±
1%
0 10
0
1%
