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1、BRITISH STANDARD BS EN 61605:1997 IEC 61605: 1996 Fixed inductors for use in electronic and telecommunication equipment Marking codes The European Standard EN 61605:1997 has the status of a British Standard ICS 29.180 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Un
2、controlled Copy, (c) BSI BS EN 61605:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1997 BSI 09-1999 ISBN 0 580 28007 1 National foreword This Briti
3、sh Standard is the English language version of EN 61605:1997. It is identical with IEC 61605:1996. The UK participation in its preparation was entrusted to Technical Committee EPL/51, Transformers, inductors, magnetic components and ferrite materials, which has the responsibility to: aid enquirers t
4、o understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represen
5、ted on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, p
6、ublications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally incude an annex which lists normative references to international publications with their corresponding European publications. The British Standards which im
7、plement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the n
8、ecessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, th
9、e EN title page, pages 2 to 8 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun s
10、heffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61605:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 616053 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii bla
11、nk Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61605 January 1997 ICS 01.070; 29.180 Descriptors: Fixed inductors, marking codes, colour codes, digit and letter codes, letter code for
12、tolerances, date code English version Fixed inductors for use in electronic and telecommunication equipment Marking codes (IEC 1605:1996) Inductances fixes utilises dans les quipements lectroniques et de tlcommunications Codes pour le marquage (CEI 1605:1996) Drosseln fr elektrische und nachrichtent
13、echnische Einrichtungen Kennzeichnung (IEC 1605:1996) This European Standard was approved by CENELEC on 1996-12-09. 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
14、 any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language
15、made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ic
16、eland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue d
17、e Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61605:1997 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 BSI 09-1999 2
18、Foreword The text of document 51/435/FDIS, future edition 1 of IEC 1605, prepared by IEC TC 51, Magnetic components and ferrite materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61605 on 1996-12-09. The following dates were fixed: Annexes designated “normati
19、ve” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 1605:1996 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 1General3 1.
20、1Scope3 1.2Normative references3 2Colour codes for fixed inductors3 3Digit and letter codes for inductance values5 4Letter code for tolerances of inductance values6 4.1Symmetrical tolerances in per cent6 4.2Other tolerances6 5Date code system for fixed inductors6 5.1One-character code (year/month)6
21、5.2Two-character code (year/month)6 5.3Four-character code (year/week)7 Annex ZA (normative) Normative references to international publications with their corresponding European publications8 Table 1 Values corresponding to colours4 Table 2 Cardinal numbers for the multiplier5 latest date by which t
22、he EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1997-09-01 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GM
23、T+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 BSI 09-19993 1 General 1.1 Scope This International Standard specifies marking codes for fixed inductors. The colour code specified in clause 2 gives a colour coding for fixed inductors. It is intended for use with the values of the E3 to E24 se
24、ries as specified in IEC 63. The code specified in clause 3 gives a system for marking inductance values by means of digits and letters. The code specified in clause 4 gives a system for marking the tolerance on inductance values by means of letters. The code specified in clause 5 gives systems for
25、marking of date codes on fixed inductors by means of letters and digits. 1.2 Normative references The following normative documents contain provisions, which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were
26、 valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currentl
27、y valid International Standards. IEC 63:1963, Preferred number series for resistors and capacitors. ISO 8601:1988, Data elements and interchange formats Information interchange Representation of dates and times. 2 Colour codes for fixed inductors 2.1 Colour codes for fixed inductors should be expres
28、sed in “bands”. If other shapes than bands are applied, the relevant specification shall prescribe their configuration, placement and identification. 2.2 Color codes for fixed inductors shall consist of four bands. The first three bands shall indicate inductance values and the last band shall indica
29、te tolerances. 2.3 Inductance values shall be expressed by two significant figures and another figure expressing multipliers. Colour corresponding to significant figures, multipliers and tolerances shall be as given in Table 1. The first two bands represent significant figures and the third band spe
30、cifies the multiplier. The basic unit for the inductance value shall be expressed in microhenrys. 2.4 The first band shall be the one nearest to the end of the inductor and the bands shall be so placed and spaced that there can be no confusion in reading the coding. 2.5 Any additional coding on fixe
31、d inductors shall be applied as not to confuse the coding for value and tolerance. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 4 BSI 09-1999 Table 1 Values corresponding to colours 2.6 Examples of colour code for fixed indu
32、ctors Example 1: 47 4H 10 % Example 2: 4,7 4H 2 % Example 3: 4,7 nH 5 % ColourSignificant figureMultiplierTolerance % Silver 102 10 Gold 101 5 Black0 100 20 Brown1 101 1 Red2 102 2 Orange3 103 Yellow4 104 Green5 105 Blue6 106 Violet7 103 Grey8 104 White9 None Licensed Copy: sheffieldun sheffieldun,
33、na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 BSI 09-19995 3 Digit and letter codes for inductance values 3.1 Nominal inductance values shall be expressed in three characters of letters and digits. 3.2 Where inductance values are equal to or greater than 10 4H, the
34、 first two characters indicate significant figures and the last one indicates multipliers. In this case, cardinal numbers for the multiplier shall be as given in Table 2. Table 2 Cardinal numbers for the multiplier 3.3 Inductance values less than 10 4H shall be identified with two numbers representi
35、ng the significant figures and the letter (R) designating decimal point location of 4H for the inductance values of less than 10 pH and equal to or greater than 100 nH, and the letter (N) designating decimal point location of nH for the inductance value of less than 100 nH. 3.4 Examples of digit and
36、 letter code for inductance values Cardinal number0123456789 Multiplier 100101102103104105106 ValueMarking code 0,1nHN10 0,47 nHN47 1nH1N0 4,7nH4N7 10nH10N 47nH47N 0,14HR10 0,47 4HR47 14H1R0 4,74H4R7 104H100 474H470 1004H101 4704H471 1mH102 4,7mH472 10mH103 47mH473 100mH104 470mH474 1H105 4,7H475 10
37、H106 47H476 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 6 BSI 09-1999 4 Letter code for tolerances of inductance values 4.1 Symmetrical tolerances in per cent The following letter codes shall be used for indicating the symm
38、etrical tolerance on inductance values: These letter codes shall be placed after the inductance values. 4.2 Other tolerances For tolerances for which code letter has not been laid down, the letter A may be used. The letter A indicates that the tolerance is to be identified in other documents. 5 Date
39、 code system for fixed inductors 5.1 One-character code (year/month) Date codes of year and month in one character shall be expressed in the following code system and should be repeated every four years: 5.2 Two-character code (year/month) Where the date codes of the year and month of the manufactur
40、e in two characters are required, the following code system shall be used: Tolerance % Letter code 1 2 5 10 20 F G J K M Year Month 123456789101112 1996npqrstuvwxyz 1997ABCDEFGHJKLM 1998NPQRSTUVWXYZ 1999abcdefghjklm 2000npqrstuvwxyz 2001ABCDEFGHJKLM wNPQwwwwwwwww wwwwwwwwwwwww wwwwwwwwwwwww Example
41、1: March 1996:q Example 2: November 1998:Y YearLetterYearLetterYearLetterYearLetter 1990A1995F2000M2005T 1991B1996H2001N2006U 1992C1997J2002P2007V 1993D1998K2003R2008W 1994E1999L2004S2009X NOTEThese codes, which indicate the year, repeat after each cycle of 20 years. Licensed Copy: sheffieldun sheff
42、ieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 BSI 09-19997 5.3 Four-character code (year/week) Where the date codes of the year and week of manufacture are required, the code system shall use four figures. The first two figures shall be the last two figures
43、 of the year and the last two figures shall be the numbering of the week. The numbering of the week shall be in accordance with ISO 8601. MonthCharacterMonthCharacter January February March April May June 1 2 3 4 5 6 July August September October November December 7 8 9 O N D Example 1: March 1996:H
44、3 Example 2: November 1998:KN Example 1: Tenth week of 1996:9610 Example 2: Forty-second week of 1998:9842 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61605:1997 8 BSI 09-1999 Annex ZA (normative) Normative references to international
45、 publications with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated referenc
46、es, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). NOTEWhen an international publication
47、 has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. PublicationYearTitleEN/HDYear IEC 631963Preferred number series for resistors and capacitors ISO 86011988Data elements and interchange formats Information interchange Representation of dates and times License
48、d Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 13:40:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61605:1997 IEC 61605: 1996 BSI 389 Chiswick High Road London W4 4AL BSI British S
49、tandards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be