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~ Electronic Component Letter and Colour Codes ~


Typographic or letter codes for ERIE and older tubular ceramic capacitors

These are marked with 1 to 3 numbers and a decimal point to indicate the value in pF with 2 letters to indicate the tolerance and temperature coefficient or 3 letters to indicate the tolerance and dielectric material used for high permittivity types (Hi-k dielectric)

For values between 1000pF and 9900pF K is used as the 1000s marker i.e. 1K = 1,000pF and 3K3 = 3,300pF ~ For values 10,000pF and over the value is marked in µF where .01 = 10,000pF or 10nF nowadays

Note that a value of 470 is actually 470pF whereas modern letter codes would make the value 47pF i.e. 47 multiplied by 100 pF ~ Before the 1970s things were simpler ? ~ 470JN = 470pF ±5% -750ppm/°C

Emphasis was given to the temperature coefficient because ceramic capacitors were often used to compensate for the temperature effects of inductors in tuned circuits and filters ~ In the days before naked bungee jumping one of the biggest thrills you could get was making a precise odd value of capacitance with a specific temperature coefficient from a minimum of standard values

The working voltage for the 11mm and 14mm long white tube versions shown below is 750Vdc ~ 500Vac or 175VA @ 0.5Arms for RF ~ This form of coding was also applied to ceramic disc capacitors until the 1960s and can be confused with markings on later disc capacitors so beware

First letter
Tolerance
Second letter
Temperature coefficient /°C
or Second letter pair
Dielectric type for Hi-K
B
±0.1pF
W
P470 (+470ppm)
AA
K060011
C
±0.25pF
A
P100 (+100ppm)
AC
K120051
D
±0.5pF
B
P030 (+30ppm)
AD
K120061
F
±1%
C
NPO (±0ppm)
AE
K120071
G
±2%
D
N030 (-30ppm)
AF
K120081
H
±2.5%
E
N050 (-50ppm)
AG
K170041
J
±5%
F
N080 (-80ppm)
AH
K170051
K
±10%
G
N150 (-150ppm)
AJ
K170061
M
±20%
H
N220 (-220ppm)
AK
K250011
N
-20% +40%
J
N330 (-330ppm)
AL
K2600
P
-20% +80%
K
N470 (-470ppm)
AM
K3000
R
0 +100%
L
N560 (-560ppm)
AN
K350011
S
±25%
M
N650 (-650ppm)
AO
K350081
T
-20% +100%
N
N750 (-750ppm)
AP
K4000
U
-20% +50%
P
N1500 (-1500ppm)
AR
K4007
V
±50%
R
N2200 (-2200ppm)
AS
K400011
S
N3300 (-3300ppm)
AV
K7000

6.8pF ±0.25pF
-30ppm
T
N4200 (-4200ppm)
AW
K7001
U
N4700 (-4700ppm)
AX
K7004
V
N5600 (-5600ppm)
AY
K750012
AZ
K800011
6.8pF 10%+100ppm
BA
K4500
BB
K6994
BC
K6998
BD
K7002



4 or 5 coloured dots or bands for tubular Ceramic Capacitor colour code

For only 4 colours ignore the 1st or end colour ~ If you have a colour that does not fit like Blue for dot 4 or 5 then you are reading the wrong way or this is the wrong table for the component

1st or end colour Temperature coefficient (ppm/°C)
2nd & 3rd colours
C Value
Significant figures
4th colour
C Value
Multiplier
5th colour Tolerance
C > 10pF
5th colour Tolerance
C < 10pF
NPO (0)
0
x1pF
±20%
±2pF
N030 (-30)
1
x10pF
±1%
N080 (-80)
2
x100pF
±2%
N150 (-150)
3
x1nF
±2.5%
±0.25pF
N220 (-220)
4
x10nF
N330 (-330)
5
6.8pF ±1pF
0ppm
±5%
±0.5pF
N470 (-470)
6
6.8pF ±0.5pF
-30ppm
N750 (-750)
7
P030 (+30)
8
x0.01pF
P100 (+100)
9
x0.1pF
±10%
±1pF

See Preferred Value Calculator

6 Colour dots or bands tubular Ceramic Capacitor colour code

If you have a colour that does not fit like Yellow for dot 6 or Blue for dot 2 then you are reading the wrong way or this is the wrong table for the component you have

1st or end colour Temperature coefficient ppm/°C
2nd colour

temperature coefficient Multiplier

3rd & 4th colours
C Value
Significant figures
5th colour
C Value
Multiplier
6th colour
Tolerance
C > 10pF
6th colour
Tolerance
C < 10pF
0
x1
0
x1pF
±20%
±2pF
-3
x10
1
x10pF
±1%
-8
x100
2
x100pF
±2%
-1.5
x1000
3
x1nF
±2.5%
±0.25pF
-2.2
x10,000
4
x10nF
-3.3
5
100pF ±10%
-3300ppm
±5%
±0.5pF
-4.7
6
270pF ±10%
-470ppm
-7.5
7
+3
x0.01
8
x0.01pF
+1
x0.1
9
x0.1pF
±10%
±1pF



6 Coloured dot moulded Mica Capacitor colour code
Look for an Arrow in the moulding and with the arrow facing left to right start reading from top left clockwise finishing at Red Green or White at bottom left ~ Top left colour indicates the construction type which is sometimes left blank when a colour fleck is introduced to the moulding ~ Any colours not in the table positions below indicates you are reading the wrong way or wrong component for this table
Top Left colour
Construction type
Next 2 colours
Significant figures
next colour Multiplier
5th colour Tolerance
6th colour Working voltage
0
x1pF
±20%
1
x10pF
±1%
Metalised
2
x100pF
±2%
350Vdc
3
x1nF
4
47pF ±2%
750Vdc
Metalised Mica
Foil
5
750Vdc
6
7
8
x0.01pF
9
x0.1pF
2000Vdc
GOLD
0.1pF
±5%
SILVER
0.01pF
±10%
NONE ±20%



Metalised Polyester ~ Philips Mullard C280 ~ Capacitor colour code
Read colours from top to bottom ~ If there are less than 5 colour bands then consider two adjacent colours are the same e.g. 22nF or 330nF or 1µF 5% with 4 bands and 3.3µF 5% or 2.2µF 5% only 3 bands
Top & 2nd colour Significant figures
3rd colour Multiplier
4th colour Tolerance
5th colour Working Voltage
0
0
±20%
1
1
100nF (10x0.01µF)
±20% 400Vd.c.
100Vdc
2
2
250Vdc
3
3
x0.001µF
4
4
x0.01µF
400Vdc
5
5
x0.1µF
±5%
6
6

220nF (22x0.01µF)
±10% 400V d.c.

630Vdc
7
7
8
8
9
9
±10%
1000Vdc

See Preferred Value Calculator

Vintage Solid Carbon Rod Resistor colour code
Body colour
1st Significant Figure
End colour
2nd Significant Figure
Centre Dot colour
Multiplier
End (Dot) colour
Tolerance
0
0
x1Ω
1
1
x10Ω
2
2
x100Ω

33kΩ ±10%
3
3
x1kΩ
4
4
x10kΩ
5
5
x100kΩ
6
6
x1MΩ
7
7

47kΩ ±20%
8
8
9
9
NONE ±20%
SILVER x0.01Ω
SILVER ±10%
GOLD x0.1Ω
GOLD ±5%

See Preferred Value Calculator

3 & 4 Band Carbon Composition Resistor colour code
1st colour band
1st Significant Figure
2nd colour band
2nd Significant Figure
3rd colour band
Multiplier
4th colour band
Tolerance
0
0
x1Ω
1
1
x10Ω
±1%
2
2
x100Ω
±2%
3
3
x1kΩ
4
4
x10kΩ
±5% see note below
5
5
x100kΩ

4.7MΩ 5%
6
6
x1MΩ
7
7

47kΩ ±10%
8
8
9
9

330Ω ±2%
GOLD x0.1Ω
GOLD ±5%
SILVER x0.01Ω
SILVER ±10%
NONE ±20%
Sometimes a 5th Salmon Pink colour band is added to indicate a high stability carbon composition is used as shown above ~ 330Ω ±2%. This should not to be confused with modern 5 band resistors as outlined in the next table below ~ Philips VR series of high ohmic resistors and some others use Yellow in place of gold for tolerance ~ 4.7MΩ 5% above

See Preferred Value Calculator

5 & 6 Band Resistor colour code

Unlike older resistors the widest band is often the last of 6 ~ If only 5 bands ignore last column in table

1st 3 colour bands Significant Figures
4th colour band
R Multiplier
5th colour band Tolerance
6th Colour band
ppm / °C
0
x1Ω
1
x10Ω
±1%
+100
2
x100Ω
±2%
+50
3
x1kΩ

68kΩ 1% 50 ppm/°C
+15
4
x10kΩ
55
5
x100kΩ
6
x1MΩ
±0.25%
+10
7

47kΩ 1% 50 ppm/°C
±0.1%
+5
8
9
+1
GOLD x0.1Ω
GOLD ±5%
SILVER x0.01Ω
SILVER ±10%



Cartridge Fuse paint dot or float transfer colour code
150mA
500mA
SALMON-PINK
50mA
VIOLET
2A
BLACK
60mA
WHITE
3A
GREY
100mA
BLACK
WHITE
5A
RED
150mA
ORANGE
7A
BROWN
250mA
ORANGE
BLACK
10A
YELLOW
500mA
ORANGE
GREY
12A
GREEN
750mA
ORANGE
GREEN
15A
BLUE
1A
ORANGE
VIOLET
20A
SKY-BLUE
1.5A
ORANGE
WHITE
25A


QUAD Hi Fi QUAD Hi-Fi Buy Beer Button Component Colour Codes QUAD Modifications and information

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