Marking codes for resistors and capacitors

IEC 60062:2016 specifies designation and marking codes for capacitors and resistors. It provides coding methods for the resistance or capacitance value and its tolerance, including colour coding for resistors. It also provides date code systems suitable for the marking of small components. This edition includes the following significant technical changes with respect to the previous edition:
- introduction of the new code colour pink for the coding of the multiplier 10-3;
- introduction of new subclauses, 3.2 Prescription of code colours, 3.3 Methods for marking resistance value and tolerance, 3.4 Methods for TCR marking, for improved clarity, the subjects of colour assignment, coding of R value and tolerance, and coding of TCR is dealt with in separate clauses;
- inclusion of illustrations for TCR marking by interrupted colour band;
- inclusion of a new subclause on a fixed length code marking, fixed length code marking of resistance values with up to 3 significant digits, hence a fixed code length of 4 digits, and fixed length code marking of capacitance values with up to 2 significant digits, hence a fixed code length of 3 digits;
- introduction of two new clauses, Clause 6, Coding of properties specific to capacitors and Clause 7, Coding of properties specific to resistors;
- introduction of Annex A, Special three character coding of resistance value with three significant numerals.
The contents of the corrigendum of December 2016 have been included in this copy.

Codes de marquage des résistances et des condensateurs

L'IEC 60062:2016 spécifie des codes de désignation et de marquage pour les condensateurs et les résistances. Elle fournit des méthodes de codage pour les valeurs de résistance et de capacité et leurs tolérances, y compris le codage par couleurs des résistances. Elle fournit également des systèmes de code de date pour le marquage de petits composants. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- introduction de la nouvelle couleur de codage rose pour le facteur multiplicateur 10-3; - introduction de nouveaux paragraphes: 3.2 Prescription de couleurs de codage, 3.3 Méthodes de marquage de la valeur d'une résistance et de la tolérance, 3.4 Méthodes de marquage du coefficient de température de résistance. Pour plus de clarté, l'attribution des couleurs, le codage de la valeur d'une résistance et de la tolérance et le codage du coefficient de température de résistance sont traités dans des articles distincts;
- ajout d'illustrations sur le marquage du coefficient de température de résistance par une bande de couleur interrompue;
- ajout d'un nouveau paragraphe sur un marquage de code de longueur fixe, un marquage de code de longueur fixe des valeurs de résistance comportant jusqu'à 3 chiffres significatifs, donc un code de longueur fixe de 4 chiffres et un marquage de code de longueur fixe des valeurs de capacité comportant jusqu'à 2 chiffres significatifs, donc un code de longueur fixe de 3 chiffres;
- introduction de deux articles, l'Article 6, Codage des propriétés spécifiques aux condensateurs et l'Article 7, Codage des propriétés spécifiques aux résistances;
- introduction de l'Annexe A, Codage spécial à trois caractères de la valeur d'une résistance avec trois chiffres significatifs.
Le contenu du corrigendum de décembre 2016 a été pris en considération dans cet exemplaire.

General Information

Status
Published
Publication Date
11-Jul-2016
Current Stage
PPUB - Publication issued
Completion Date
12-Jul-2016
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IEC 60062
Edition 6.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Marking codes for resistors and capacitors
Codes de marquage des résistances et des condensateurs
IEC 60062:2016-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60062
Edition 6.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Marking codes for resistors and capacitors
Codes de marquage des résistances et des condensateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.020 ISBN 978-2-8322-3515-7

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60062:2016 © IEC 2016
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Colour code for fixed resistors ......................................................................................... 6

3.1 General rules .......................................................................................................... 6

3.2 Prescription of code colours .................................................................................... 6

3.3 Methods for marking resistance value and tolerance ............................................... 7

3.3.1 Marking of resistance values with two significant numerals .............................. 7

3.3.2 Marking of resistance values with two significant numerals and

tolerance ......................................................................................................... 8

3.3.3 Marking of resistance values with three significant numerals and

tolerance ......................................................................................................... 8

3.4 Methods for TCR marking ....................................................................................... 9

4 Letter and numeral code for resistance and capacitance values .................................... 10

4.1 General rules ........................................................................................................ 10

4.2 Resistors .............................................................................................................. 11

4.2.1 The RKM code system ................................................................................... 11

4.2.2 Three-character code system for resistors ..................................................... 13

4.2.3 The four-character code system for resistors ................................................. 14

4.3 Capacitors ............................................................................................................ 15

4.3.1 The multiplier code system for capacitors ...................................................... 15

4.3.2 Three-character code systems for capacitors ................................................. 17

5 Letter code for tolerance on capacitance or resistance values ....................................... 18

5.1 General rules ........................................................................................................ 18

5.2 Coding of symmetrical relative tolerances ............................................................. 18

5.3 Coding of asymmetrical relative tolerances ........................................................... 19

5.4 Coding of symmetrical absolute tolerances ........................................................... 19

5.5 Other coding of tolerances .................................................................................... 20

6 Coding of properties specific to capacitors ..................................................................... 20

6.1 General rules ........................................................................................................ 20

6.2 Coding of the dielectric material of plastic film capacitors ..................................... 20

7 Coding of properties specific to resistors ....................................................................... 20

7.1 General rules ........................................................................................................ 20

7.2 Coding of the temperature coefficient of resistance ............................................... 21

8 Date code system for capacitors and resistors ............................................................... 21

8.1 General rules ........................................................................................................ 21

8.2 Two-character codes for year and month .............................................................. 22

8.2.1 Choice of a repetition cycle ............................................................................ 22

8.2.2 Two-character codes for year and month in a twenty-year cycle .................... 22

8.2.3 Two-character codes for year and month in a ten-year cycle .......................... 23

8.3 Four-character codes for year and week ............................................................... 23

8.3.1 Choice of a repetition cycle ............................................................................ 23

8.3.2 Fully numerical four-numeral code ................................................................. 23

8.3.3 Alphanumerical twenty-year cycle code ......................................................... 24

8.3.4 Alphanumerical ten-year cycle code............................................................... 24

8.4 Single-character code for year and month ............................................................. 24

---------------------- Page: 4 ----------------------
IEC 60062:2016 © IEC 2016 – 3 –

Annex A (informative) Special three-character code system for resistors ............................. 26

Annex X (informative) Cross-reference for references to the previous edition of this

standard ............................................................................................................................... 28

Bibliography .......................................................................................................................... 30

Figure 1 – Colour marking of a resistor 6,8 kΩ, tolerance ±20 % ............................................. 8

Figure 2 – Colour marking of a resistor 750 kΩ, tolerance ±5 % .............................................. 8

Figure 3 – Colour marking of a resistor 249 kΩ, tolerance ±1 % .............................................. 9

Figure 4 – Colour marking of a resistor with a 6 band for TCR marking ................................ 9

Figure 5 – Colour marking of a resistor with an interrupted 6 band for TCR marking ......... 10

Figure 6 – Colour marking of a resistor using an alternative method of inter-band

colour dots for TCR coding ................................................................................................... 10

Table 1 – Code colour prescriptions ........................................................................................ 7

Table 2 – Coding of resistance values with up to 3 significant numerals ................................ 12

Table 3 – Fixed length coding of resistance values with up to 3 significant numerals ........... 13

Table 4 – Coding of resistance values with 4 significant numerals ........................................ 13

Table 5 – Coding of resistance values in the three-character code system ........................... 14

Table 6 – Coding of resistance values in the four-character code system ............................. 15

Table 7 – Coding of capacitance values with up to 2 significant numerals ............................ 16

Table 8 – Fixed length coding of capacitance values with up to 2 significant numerals ......... 16

Table 9 – Coding of capacitance values with 3 significant numerals ...................................... 17

Table 10 – Coding of capacitance values in the picofarad based three-character code

system .................................................................................................................................. 17

Table 11 –Coding of capacitance values in the microfarad based three-character code

system .................................................................................................................................. 18

Table 12 – Letter code for symmetrical relative tolerances .................................................... 19

Table 13 – Letter code for asymmetrical relative tolerances .................................................. 19

Table 14 – Letter code for symmetrical absolute tolerances of capacitors ............................. 20

Table 15 – Letter code for the dielectric material of plastic film capacitors ........................... 20

Table 16 – Letter code for the temperature coefficient of resistance...................................... 21

Table 17 – Character code letters for the month ................................................................... 22

Table 18 – Code letters for the year in a twenty-year cycle ................................................... 22

Table 19 – Code letters for the year in a ten-year cycle ........................................................ 23

Table 20 – Single-character code for year and month at a 4-year cycle ................................. 25

Table A.1 – Coding of the significant numerals of the E96 series .......................................... 26

Table A.2 – Coding of the multiplier ...................................................................................... 27

Table X.1 – Cross-reference to Clauses ................................................................................ 28

Table X.2 – Cross-reference to Tables .................................................................................. 29

---------------------- Page: 5 ----------------------
– 4 – IEC 60062:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARKING CODES FOR RESISTORS AND CAPACITORS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

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governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60062 has been prepared by IEC technical committee 40:

Capacitors and resistors for electronic equipment.

This sixth edition cancels and replaces the fifth edition published in 2004 and constitutes a

technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
• introduction of the new code colour pink for the coding of the multiplier 10 ;

• introduction of new subclauses, 3.2 Prescription of code colours, 3.3 Methods for marking

resistance value and tolerance, 3.4 Methods for TCR marking, for improved clarity, the

subjects of colour assignment, coding of R value and tolerance, and coding of TCR is

dealt with in separate clauses;
• inclusion of illustrations for TCR marking by interrupted colour band;

• inclusion of a new subclause on a fixed length code marking, fixed length code marking of

resistance values with up to 3 significant digits, hence a fixed code length of 4 digits, and

---------------------- Page: 6 ----------------------
IEC 60062:2016 © IEC 2016 – 5 –

fixed length code marking of capacitance values with up to 2 significant digits, hence a

fixed code length of 3 digits;

• introduction of two new clauses, Clause 6, Coding of properties specific to capacitors and

Clause 7, Coding of properties specific to resistors;

• introduction of Annex A, Special three character coding of resistance value with three

significant numerals.
The text of this standard is based on the following documents:
FDIS Report on voting
40/2465/FDIS 40/2473/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

The contents of the corrigendum of December 2016 have been included in this copy.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 7 ----------------------
– 6 – IEC 60062:2016 © IEC 2016
MARKING CODES FOR RESISTORS AND CAPACITORS
1 Scope

This International Standard specifies designation and marking codes for capacitors and

resistors.

It provides coding methods for the resistance or capacitance value and its tolerance, including

colour coding for resistors.

It provides coding for parameters specific either to capacitors, like e.g. the dielectric material,

or to resistors, like e.g. the temperature coefficient of resistance (TCR).
It also provides date code systems suitable for the marking of small components.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60063, Preferred number series of resistors and capacitors
IEC 60757, Code for designation of colours
ISO 8601, Data elements and interchange formats – Information interchange –
Representation of dates and times
3 Colour code for fixed resistors
3.1 General rules
Colour code is applied in a sequence of individual solid colour bands.

Wherever possible, the first band shall be the one nearest to the end of the resistor and the

bands shall be so placed and spaced that there can be no confusion in reading the coding.

The design width of the band used for marking the tolerance shall be at least 1,5 times the

width of the other bands in order to avoid any confusion.
NOTE The design width is not intended to be measured.

Any additional coding shall be so applied as not to confuse the coding for value and tolerance.

Although colour bands are expected to be complete rings around the perimeter of a cylindrical

resistor body, incidental interruption of a band shall be permissible if at least two thirds of the

band is visible from any radial angle of view.
3.2 Prescription of code colours

The colours black, brown, red, orange, yellow, green, blue, violet, grey and white are used for

the coding of the figures 0 through 9 for each significant numeral. Complemented with the

---------------------- Page: 8 ----------------------
IEC 60062:2016 © IEC 2016 – 7 –

colours silver, gold and pink, they are also used for the coding of the multiplier, the tolerance

and the temperature coefficient of resistance (TCR). Table 1 summarizes the colours with all

assigned parameters and their respective values.
Table 1 – Code colour prescriptions
Significant
Colour Multiplier Tolerance TCR
numeral
Code Example % 10 /K
None — — — —
±20
Pink PK — 10 — —
Silver SR — 10 —
±10
Gold GD — 10 ±5 —
Black BK 0 1 —
±250
Brown BN 1 10
±1 ±100
Red RD 2 10 ±2 ±50
Orange OG 3 10
±0,05 ±15
Yellow YE 4 10
±0,02 ±25
Green GN 5 10 ±0,5 ±20
Blue BU 6 10
±0,25 ±10
Violet VT 7 10
±0,1 ±5
Grey GY 8 10
±0,01 ±1
White WH 9 10 — —
NOTE 1 The code letters are as defined in IEC 60757.

NOTE 2 The colours shown here as example are not intended as normative reference, but are applied for the

purpose of consistent illustration only.
3.3 Methods for marking resistance value and tolerance
3.3.1 Marking of resistance values with two significant numerals

Resistors with a tolerance of ±20 %, whose resistance values are described with two

significant numerals, are marked with a three-band colour code, consisting of two bands for

the significant numerals, followed by one band for the multiplier. The absence of the fourth

band indicates the tolerance of ±20 %. Figure 1 illustrates this with a 6,8 kΩ resistor with a

tolerance of ±20 %.
---------------------- Page: 9 ----------------------
– 8 – IEC 60062:2016 © IEC 2016
IEC
Key:
st st
1: 1 band 1 numeral Blue = 6
nd nd
2: 2 band 2 numeral Grey = 8
rd 2
3: 3 band Multiplier Red = × 10
Figure 1 – Colour marking of a resistor 6,8 kΩ, tolerance ±20 %
3.3.2 Marking of resistance values with two significant numerals and tolerance

Resistors with a tolerance tighter than ±20 %, whose resistance values are described with two

significant numerals, are marked with a four-band colour code, consisting of two bands for the

significant numerals, followed by one band for the multiplier, followed by the last and wider

band showing the tolerance. Figure 2 illustrates this with a 750 kΩ resistor with a tolerance of

±5 %.
IEC
Key:
st st
1: 1 band 1 numeral Violet = 7
nd nd
2: 2 band 2 numeral Green = 5
rd 4
3: 3 band Multiplier Yellow = × 10
4: 4 band Tolerance Gold = ±5 %
Figure 2 – Colour marking of a resistor 750 kΩ, tolerance ±5 %
3.3.3 Marking of resistance values with three significant numerals and tolerance

Resistors, whose resistance values are described with three significant numerals, are marked

with a five-band colour code, consisting of three bands for the significant numerals, followed

by one band for the multiplier, followed by the last and wider band showing the tolerance.

Figure 3 illustrates this with a 249 kΩ resistor with a tolerance of ±1 %.
---------------------- Page: 10 ----------------------
IEC 60062:2016 © IEC 2016 – 9 –
IEC
Key:
st st
1: 1 band 1 numeral Red = 2
nd nd
2: 2 band 2 numeral Yellow = 4
rd rd
3: 3 band 3 numeral White = 9
th 3
4: 4 band Multiplier Orange = × 10
5: 5 band Tolerance Brown = ±1 %
Figure 3 – Colour marking of a resistor 249 kΩ, tolerance ±1 %
3.4 Methods for TCR marking

Colour-code marking of the temperature coefficient shall only be used in combination with a

resistance coding for three significant numerals and is additional to the marking of resistance

value and tolerance as prescribed in 3.3.3.

One of the following methods should be used for the indication of temperature coefficients

with a code colour as prescribed in Table 1, where the tolerance band is consistently

maintained as the single wider band.

a) The TCR is marked by means of a colour band as the sixth band, as shown in Figure 4.

IEC
Key:
st st
1: 1 band 1 numeral Red = 2
nd nd
2: 2 band 2 numeral Yellow = 4
rd rd
3: 3 band 3 numeral White = 9
th 3
4: 4 band Multiplier Orange = × 10
5: 5 band Tolerance Brown = ±1 %
th -6
6: 6 band TCR Red = ±50 × 10 /K
Figure 4 – Colour marking of a resistor with a 6 band for TCR marking

NOTE The prescription of prior revisions of this standard about the sixth band to be the wider band has been

changed here as it has been found to be a reason of confusion with component users about the tolerance

marking.

b) The TCR is marked by means of an interrupted colour band as the sixth band, as shown in

Figure 5.
---------------------- Page: 11 ----------------------
– 10 – IEC 60062:2016 © IEC 2016
IEC
Key:
st st
1: 1 band 1 numeral Red = 2
nd nd
2: 2 band 2 numeral Yellow = 4
rd rd
3: 3 band 3 numeral White = 9
th 3
4: 4 band Multiplier Orange = × 10
5: 5 band Tolerance Brown = ±1 %
th -6
6: 6 band TCR Red = ±50 × 10 /K
Figure 5 – Colour marking of a resistor
with an interrupted 6 band for TCR marking
c) Other method of colour marking for TCR.

Other methods of colour marking for TCR may be used if they are clearly described by the

documentation and specification of the respective resistor, and if they do not risk

confusion with any of the methods given above.

An illustration of a possible similar method is given in Figure 6, adopting the general

principles of TCR marking for a situation with insufficient axial length for a dedicated 6th

solid or interrupted band.
IEC
Key:
st st
1: 1 band 1 numeral Red = 2
nd nd
2: 2 band 2 numeral Yellow = 4
rd rd
3: 3 band 3 numeral White = 9
th 3
4: 4 band Multiplier Orange = × 10
5: 5 band Tolerance Brown = ±1 %
th -6
6: 6 dots TCR Red = ±50 × 10 /K
Figure 6 – Colour marking of a resistor using an alternat
...

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