1、 IEC 61605 Edition 3.0 2016-10 INTERNATIONAL STANDARD Fixed inductors for use in electronic and telecommunication equipment Marking codes IEC 61605:2016-10(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of
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10、your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 61605 Edition 3.0 2016-10 INTERNATIONAL STANDARD Fixed inductors for use in electronic and telecommunication equipment Marking codes INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS
11、29.100.10 ISBN 978-2-8322-3694-9 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 61605:2016 IEC 2016 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Colour code for fixed indu
12、ctors 5 3.1 General rules 5 3.2 Examples of colour code for fixed inductors 6 4 Digit and letter code for inductance values 7 4.1 General rules 7 4.2 Examples of digit and letter code for inductance values 8 5 Letter code for tolerances of inductance values . 9 5.1 Symmetrical tolerances . 9 5.2 Oth
13、er tolerances . 9 6 Date code system for fixed inductors . 9 6.1 Single-character code for year and month . 9 6.2 Two-character code for year and month 10 6.3 Four-character code for year and week . 11 Bibliography 12 Figure 1 Example for 47 H 10 % 6 Figure 2 Example for 4,7 H 2 % 7 Figure 3 Example
14、 for 4,7 nH 5 % . 7 Table 1 Values corresponding to colours 6 Table 2 Cardinal numbers for the multiplier 7 Table 3 Examples of digit and letter code for inductance values . 8 Table 4 Letter code for symmetrical tolerance 9 Table 5 Single-character code for year and month for a four-year cycle . 10
15、Table 6 Code letter for year in a twenty-year cycle . 10 Table 7 Character code letter for month . 11 IEC 61605:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIXED INDUCTORS FOR USE IN ELECTRONIC AND TELECOMMUNICATION EQUIPMENT MARKING CODES FOREWORD 1) The International Electrotechnic
16、al 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 e
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25、blication 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 Pu
26、blication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61605 has been prepared by IEC technical committee 51: Magnetic components and ferrite materials. This third edition cancels and replaces the sec
27、ond edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The date code system for fixed inductors has been updated. The text of this standard is based on the following docu
28、ments: CDV Report on voting 51/1135/CDV 51/1147/RVC 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. 4 IEC 61605:2016 IEC 2016 The c
29、ommittee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site 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 e
30、dition, or amended. A bilingual version of this publication may be issued at a later date. IEC 61605:2016 IEC 2016 5 FIXED INDUCTORS FOR USE IN ELECTRONIC AND TELECOMMUNICATION EQUIPMENT MARKING CODES 1 Scope This document specifies marking codes for fixed inductors. The colour code specified in Cla
31、use 3 gives a colour coding for fixed inductors. It is intended for use with the values of the E3 to E24 series as specified in IEC 60063. The code specified in Clause 4 gives a system for marking inductance values by means of digits and letters. The code specified in Clause 5 gives a system for mar
32、king the tolerance on inductance values by means of letters. The code specified in Clause 6 gives a system for marking of date codes on fixed inductors by means of letters and digits. 2 Normative references The following documents are referred to in the text in such a way that some or all of their c
33、ontent constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8601, Data elements and interchange formats Information interchange Representation of
34、dates and times 3 Colour code for fixed inductors 3.1 General rules Colour codes for fixed inductors should be expressed in “bands”. If other shapes than bands are applied, the relevant specification shall prescribe their configuration, placement and identification. Colour codes for fixed inductors
35、shall consist of four bands. The first three bands shall indicate inductance values and the last band shall indicate tolerances. Inductance values shall be expressed by two significant figures and another figure expressing multipliers. Colour corresponding to significant figures, multipliers and tol
36、erances shall be as given in Table 1. The first two bands represent significant figures and the third band specifies the multiplier. The basic unit for the inductance value shall be expressed in H. The first band shall be the one nearest to the end of the inductor and the bands shall be so placed an
37、d spaced that there can be no confusion in reading the coding. Any additional coding on fixed inductors shall be applied in such a way as not to confuse the coding for value and tolerance. 6 IEC 61605:2016 IEC 2016 Table 1 Values corresponding to colours Colour Significant figure Multiplier Toleranc
38、e % Silver 10 2 10 Gold 10 1 5 Black 0 10 0 Brown 1 10 1 1 Red 2 10 2 2 Orange 3 10 3 Yellow 4 10 4 Green 5 10 5 Blue 6 10 6 Violet 7 10 3 Grey 8 10 4 White 9 None 20 3.2 Examples of colour code for fixed inductors The examples of colour code for fixed inductors are shown in Figure 1, Figure 2 and F
39、igure 3. Key: 1: 1 stband 1 stnumeral Yellow = 4 2: 2 ndband 2 ndnumeral Violet = 7 3: 3 rdband Multiplier Black = 10 0 4: 4 thband Tolerance Silver = 10 % Figure 1 Example for 47 H 10 % IEC 1 2 3 4 IEC 61605:2016 IEC 2016 7 Key: 1: 1 stband 1 stnumeral Yellow = 4 2: 2 ndband 2 ndnumeral Violet = 7
40、3: 3 rdband Multiplier Gold = 10 -14: 4 thband Tolerance Red = 2 % Figure 2 Example for 4,7 H 2 % Key: 1: 1 stband 1 stnumeral Yellow = 4 2: 2 ndband 2 ndnumeral Violet = 7 3: 3 rdband Multiplier Grey = 10 -44: 4 thband Tolerance Gold = 5 % Figure 3 Example for 4,7 nH 5 % 4 Digit and letter code for
41、 inductance values 4.1 General rules Nominal inductance values shall be expressed in three characters of letters and digits. Where inductance values are equal to, or greater than, 10 H, the first two characters indicate significant figures and the last one indicates multipliers. In this case, cardin
42、al numbers for the multiplier shall be as given in Table 2. Table 2 Cardinal numbers for the multiplier Cardinal number 0 1 2 3 4 5 6 7 8 9 Multiplier 10 010 110 210 310 410 510 6 IEC 1 2 3 4 IEC 1 2 3 4 8 IEC 61605:2016 IEC 2016 Inductance values less than 10 H and equal to, or greater than, 100 nH
43、 shall be identified with two numbers representing the significant figures and the letter (R) designating decimal point location H, and the letter (N) designating dec imal point location of nH for the inductance value of less than 100 nH. 4.2 Examples of digit and letter code for inductance values E
44、xamples of digit and letter code for inductance values are shown in Table 3. Table 3 Examples of digit and letter code for inductance values Inductance values Digit and letter code 0,1 nH N10 0,47 nH N47 1 nH 1N0 4,7 nH 4N7 10 nH 10N 47 nH 47N 0,1 H R10 0,47 H R47 1 H 1R0 4,7 H 4R7 10 H 100 47 H 470
45、 100 H 101 470 H 471 1 mH 102 4,7 mH 472 10 mH 103 47 mH 473 100 mH 104 470 mH 474 1 H 105 4,7 H 475 10 H 106 47 H 476 IEC 61605:2016 IEC 2016 9 5 Letter code for tolerances of inductance values 5.1 Symmetrical tolerances The letter codes shown in Table 4 shall be used to indicate the symmetrical to
46、lerance on inductance values. Table 4 Letter code for symmetrical tolerance Tolerance Letter code 0,05 nH W 0,1 nH B 0,2 nH C 0,3 nH S 0,5 nH D 1 % F 2 % G 3 % H 5 % J 10 % K 15 % L 20 % M 30 % N These letter codes shall be placed after the inductance values. 5.2 Other tolerances For tolerances for
47、which a 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. 6 Date code system for fixed inductors 6.1 Single-character code for year and month Date codes of year and month in single-character shall be expres
48、sed in the code system shown in Table 5 and should be repeated every four years. 10 IEC 61605:2016 IEC 2016 Table 5 Single-character code for year and month for a four-year cycle Year Month Letter Year Month Letter Year Month Letter Year Month Letter 2001 Jan. A 2002 Jan. N 2003 Jan. a 2004 Jan. n 2
49、005 Feb. B 2006 Feb. P 2007 Feb. b 2008 Feb. p 2009 Mar. C 2010 Mar. Q 2011 Mar. c 2012 Mar. q 2013 Apr. D 2014 Apr. R 2015 Apr. d 2016 Apr. r 2017 May E 2018 May S 2019 May e 2020 May s 2021 Jun. F 2022 Jun. T 2023 Jun. f 2024 Jun. t 2025 Jul. G 2026 Jul. U 2027 Jul. g 2028 Jul. u 2029 Aug. H 2030 Aug. V 2031 Aug. h 2032 Aug. v 2033 Sep. J 2034 Sep. W 2035
