IEC 60063:2015
(Main)Preferred number series for resistors and capacitors
Preferred number series for resistors and capacitors
IEC 60063:2015 provides series of preferred values for the resistance of resistors and for the capacitance of capacitors. The definition of such series with a defined numeric resolution is a basic prerequisite for the marking and coding of capacitors and resistors with their respective capacitance or resistance values as described in IEC 60062. This edition includes the following significant technical changes with respect to the previous edition:
- revision of the information on a relationship between an E Series and the tolerance of a resistance or capacitance value of a respective component;
- introduction of advice on a possible deduction from the marking of a component to an associated E Series and also to an associated tolerance;
- complete editorial revision.
Séries de valeurs normales pour résistances et condensateurs
L'IEC 60063:2015 fournit des séries de valeurs préférentielles pour des résistances et des condensateurs. La définition de telles séries avec une résolution numérique définie est une nécessité préalable de base pour le marquage et le codage de résistances et de condensateurs avec leurs valeurs de résistance et de capacité respectives comme cela est décrit dans l'IEC 60062. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- révision des informations sur la relation entre une série E et la tolérance sur la valeur de la résistance ou de la capacité d'un composant;
- introduction de conseils sur une déduction possible du marquage d'un composant d'une série E associée et d'une tolérance associée;
- révision éditoriale complète.
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IEC 60063 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Preferred number series for resistors and capacitors
Séries de valeurs normales pour résistances et condensateurs
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IEC 60063 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Preferred number series for resistors and capacitors
Séries de valeurs normales pour résistances et condensateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.040; 31.060 ISBN 978-2-8322-2427-4
– 2 – IEC 60063:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Terms and definitions . 5
4 Number series . 5
4.1 Number series with two significant digits . 5
4.2 Number series with three significant digits . 6
5 Application of an E series . 8
5.1 Relationship between E series and tolerances . 8
5.2 Deduction from the marking and coding of values . 9
Bibliography . 10
Table 1 – Number series with two significant digits . 6
Table 2 – Number series with three significant digits . 7
Table 3 – Tolerances and recommended E series . 8
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PREFERRED NUMBER SERIES FOR RESISTORS AND CAPACITORS
FOREWORD
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International Standard IEC 60063 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This third edition cancels and replaces the second edition published in 1963 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– revision of the information on a relationship between an E Series and the tolerance of a
resistance or capacitance value of a respective component;
– introduction of advice on a possible deduction from the marking of a component to an
associated E Series and also to an associated tolerance;
– complete editorial revision.
– 4 – IEC 60063:2015 © IEC 2015
The text of this standard is based on the following documents:
FDIS Report on voting
40/2340A/FDIS 40/2370/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.
PREFERRED NUMBER SERIES FOR RESISTORS AND CAPACITORS
1 Scope
This International Standard provides series of preferred values for the resistance of resistors
and for the capacitance of capacitors.
The definition of such series with a defined numeric resolution is a basic prerequisite for the
marking and coding of capacitors and resistors with their respective capacitance or resistance
values as described in IEC 60062.
r i
NOTE The number series defined in this standard are based on progressive ratios of 10 , with r = 3 · 2 , and i
being a whole number in the range of 0 to 6, hence e.g. of 10 .
This system of progressive ratios had been established prior to the 1952 release of the first edition of this
standard as a consequence of the standardisation of tolerances at ±5 %, ±10 % and ±20 % and the related
commercial practice. An adoption of the ISO practice, based on a 10 system, was never considered achievable.
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 60062, Marking codes for resistors and capacitors
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
E series
infinite series of numeric values with a given number of elements per decade, rounded or
derived from the elements of a geometric series
Note 1 to entry: The number of elements within a decade, r, is given in the
...
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