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Capacitor codes


Budgetronics for electronic hobby materials

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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