How to read a value from a capacitor.
You can read the value from most capacitors. The only difficult to read capacitors are the very small ones because there is not much space on them to put a value. These small capacitors have 3 numbers on them and sometimes only two.
If there are only two numbers you will have to read the value as pf. For instance the number 33 printed on a capacitor means its 33 pf.
With 3 numbers this works different. The first number represents the tens, the second number the ones and the third number is the multiply factor.
See below for examples.
Third number
|
Multiply with
|
0
|
1
|
1
|
10
|
2
|
100
|
3
|
1000
|
4
|
10 000
|
5
|
100 000
|
6
|
Not used
|
7
|
Not used
|
8
|
0,01
|
9
|
0,1
|
For example: A capacitor with the number 102 printed on it means a 10 with two zeros. The value in this case is 1.000 pF or 0,001 µF also named 1 nf.
More examples below.
Indication
|
Value
|
10
|
10 pF
|
|
|
100
|
100 pF
|
|
|
101
|
100 pF
|
|
|
102
|
1000 pF
|
1 nF
|
0,001 µF
|
103
|
10 000 pF
|
10 nF
|
0,01 µF
|
104
|
100 000 pF
|
100 nF
|
0,1 µF
|
105
|
1000 000 pF
|
1000 nF
|
1 µF
|
Sometimes there is also a fourth indicator at the end of the 3 number code. For instance 102K means a 1.000 pf capacitor with a +/- 10 % tolerance.
Letter
|
Tolerantie
|
D
|
+/- 0,5 pF
|
F
|
+/- 1 %
|
G
|
+/- 2 %
|
H
|
+/- 3 %
|
J
|
+/- 5 %
|
K
|
+/- 10 %
|
M
|
+/- 20 %
|
P
|
+ 100 %, - 0 %
|
Z
|
+ 80 %, - 20 %
|
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