Radio Frequency by Steve Winder and Joe Carr - HTML preview

26.9 Colour codes

26.9.1 Resistor and capacitor colour coding

A
_B Tip A^A_{B B}

C
C
C
D
D
^{E D} Tubular capacitors Resistors Resistors
(old type)
Tantalum capacitors 1 1 2 3 4
3

2 Black − 0 × 1 10 V 4 Brown 1 1 × 10
Red 2 2 × 100
Orange 3 3 −
Yellow 4 4 − 6.3 V Green 5 5 − 16 V Blue 6 6 − 20 V Violet 7 7 −
Grey 8 8 × 0.01 25 V White 9 9 × 0.1 3 V

(Pink 35 V) A B C D E

‘Candy stripe’ capacitors
+

 

Resistor and capacitor colour coding

 

Band C (multiplier) Band D (tolerance) Band E Note that adjacent bands may be of the same colour unseparated.

Black – 0 Resistors 1 Capacitors 1
Brown 1 1 10 10
Red 2 2 100 100
Orange 3 3 1 000 1 000
Yellow 4 4 10 000 10 000
Green 5 5 100 000 – Blue 6 6 1 000 000 – Violet 7 7 10 000 000 – Grey 8 8 10⁸ 0.01µF White 9 9 10⁹ 0¹µF– 1pF ±10% – – Silver – – 0.01 – ±10% – – – – Gold – – 0.1 – ±5% – – – – Pink – – – – – – – Hi-Stab. – None – – – – ±20% – – – –

Resistors

–
±1% ±2%

–
–
–
–
–
–

Capacitors

2 pF ±20% Resistors – Polyester –
0.1 pF ±1% – –capacitors – ±2% – 250 v.w. – ±2.5% – – – – – – 0.5 pF ±5% – – – – – – – – – – 0.25 pF – – –

Preferred values
E12 Series
1.0 1.2 1.5 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 and their decades

E24 Series
1.0 1.1 1.2 1.3 1.5 1.6
1.8 2.0 2.2 2.4 2.7 3.0
3.3 3.6 3.9 4.3 4.7 5.1
5.6 6.2 6.8 7.5 8.2 9.1
and their decades

26.9.2 Resistor and capacitor letter and digit code table (BS 1852)

Resistor values are indicated as follows:

0.47 marked R47
1 1R0
4.7 4R7
47 47R
100 100R
1k 1K0
10 k 10K
10 M 10M

A letter following the value shows the tolerance.
F=±1%; G=±2%; J=±5%; K=±10%; M=±20%;
R33M = 0.33 ± 20%; 6K8F = 6.8k ± 1%.
Capacitor values are indicated as:

0.68 pF marked p68
6.8 pf 6p8
1000 pF 1n0
6.8 nf 6n8
1000 nF 1µ0
6.8µF6µ8

Tolerance is indicated by letters as for resistors. Values up to 999 pF are marked in pF, from 1000 pf to 999 000 pF(= 999 nF) as nF (1000 pF = InF) and from 1000 nF(= 1µF) upwards as µF.

Some capacitors are marked with a code denoting the value in pF (first two figures) followed by a multiplier as a power of ten(3 = 10³). Letters denote tolerance as for resistors but C=±0.25 pf. E.g. 123 J = 12 pF× 10³ ± 5% = 12 000 pF (or 0.12µF).