EN 60063:2015

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.

Vorzugsreihen für die Nennwerte von Widerständen und Kondensatoren

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.

Pritrjeni kondenzatorji za uporabo v elektronski opremi - Vrste standardnih števil za upore in kondenzatorje

Ta mednarodni standard podaja vrste standardnih vrednosti za upornost uporov in kapacitivnost kondenzatorjev.
Opredelitev take vrste z določeno numerično rešitvijo je osnovni predpogoj za označevanje in kodiranje kondenzatorjev in uporov z njihovimi vrednostmi kapacitivnosti in upornosti, kot je določeno v standardu IEC 60062.
OPOMBA Vrste števil, opredeljene v tem standardu, so osnovane na progresivnih razmerjih r 10, npr. 1210, ker je r = 3 · 2i, pri čemer je i celo število v med 0 in 6.
Ta sistem progresivnih razmerij je bil uveden pred objavo prve različice tega standarda leta 1952 kot posledica standardizacije toleranc pri ±5 %, ±10 % in ±20 % in s tem povezane komercialne prakse. Sprejetje prakse ISO, osnovane na sistemu 10 10, je bilo smatrano za nedosegljivo.

General Information

• Status: Published
• Publication Date: 21-May-2015
• Withdrawal Date: 30-Apr-2018
• ICS: 31.040 - Resistors
• ICS: 31.060 - Capacitors
• Technical Committee: CLC/SR 40 - Capacitors and resistors for electronic equipment
• Drafting Committee: IEC/TC 40 - IEC_TC_40
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 22-May-2015
• Completion Date: 22-May-2015
• Ref Project: SIST EN 60063:2015 - Fixed capacitors for use in electronic equipment - Preferred number series for resistors and capacitors

Overview

EN 60063:2015 (identical to IEC 60063:2015) defines the preferred number series (E series) used to specify resistance and capacitance nominal values for resistors and capacitors. These preferred values - e.g. E3, E6, E12, E24, E48, E96, E192 - provide a consistent numeric resolution that underpins value marking, coding and commercial interchangeability. The standard explains the generation of two‑ and three‑significant‑digit series, the relationship between an E series and component tolerances, and guidance for deducing an E series or tolerance from component marking. EN 60063:2015 includes editorial updates and clarifications on tolerance relationships and marking deductions compared with prior editions.

Key topics

• E series definitions
  • Two‑digit series: E3, E6, E12, E24 (decimal multiples and submultiples with two significant digits).
  • Three‑digit series: E48, E96, E192 (values listed with three significant digits).
• Generation method
  • Series are derived from a geometric progression and rounded to the required significant digits; historic rounding produces a few conventional deviations (e.g., some E24 values).
• Tolerance vs. E series
  • Recommended pairings link tolerance bands to E series (examples):
    • E3 for tolerances wider than ±20%
    • E6 for ±20%
    • E12 for ±10%
    • E24 for ±5%
    • E48 for ±2%
    • E96 for ±1%
    • E192 for tighter than ±1%
  • For capacitors, practical practice often limits numeric resolution (two significant digits) and commonly uses E24 up to ±1% tolerance.
• Marking and coding
  • Guidance on how numeric coding (per IEC 60062) implies possible E series/tolerance when explicit tolerance marking is absent; cautions about ambiguity and necessity for clear documentation.

Applications

• Ensures consistent nominal values for designing and sourcing resistors and capacitors in electronic equipment.
• Supports PCB designers, component engineers, procurement and inventory management by standardizing available values and minimizing overlap between tolerance bands.
• Useful in component marking, coding and labeling processes where limited marking space requires inference from numeric resolution.

Who uses this standard

• Component manufacturers and test houses
• Electronic design engineers and PCB designers
• Purchasing, quality and regulatory teams in electronics industry
• Standards bodies and test laboratories

Related standards

• IEC 60062 - Marking codes for resistors and capacitors (coding and marking schemes referenced by EN 60063)
• ISO 3 - Preferred numbers (background on preferred number series)

EN 60063:2015 is essential when you need predictable nominal values, harmonized tolerances and reliable marking/coding practices for electronic passive components.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Pritrjeni kondenzatorji za uporabo v elektronski opremi - Vrste standardnih števil za upore in kondenzatorjeVorzugsreihen für die Nennwerte von Widerständen und KondensatorenSéries de valeurs normales pour résistances et condensateursFixed capacitors for use in electronic equipment - Preferred number series for resistors and capacitors31.060.10Fiksni kondenzatorjiFixed capacitorsICS:Ta slovenski standard je istoveten z:EN 60063:2015SIST EN 60063:2015en01-september-2015SIST EN 60063:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60063
May 2015 ICS 31.040; 31.060
English Version
Preferred number series for resistors and capacitors (IEC 60063:2015)
Séries de valeurs normales pour résistances et condensateurs (IEC 60063:2015)
Vorzugsreihen für die Nennwerte von Widerständen und Kondensatoren (IEC 60063:2015) This European Standard was approved by CENELEC on 2015-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60063:2015 E SIST EN 60063:2015

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60063:2015 was approved by CENELEC as a European Standard without any modification. SIST EN 60063:2015

Normative references to international publications with their corresponding European publications 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. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year IEC 60062 -
Marking codes for resistors and capacitors EN 60062 -
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
IEC 60063:2015 © IEC 2015 – 3 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
PREFERRED NUMBER SERIES FOR RESISTORS AND CAPACITORS
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