1、h STD-IEC b0738-2-ENGL 1999 484Li891 0712457 2Y m INTERNATIONAL STANDARD IEC 60938-2 QC 2801 O0 Second edition 1999-1 1 Fixed inductors for electromagnetic interference suppression - Part 2: Sectional specification Inductances fixes dantiparasitage - Partie 2: Spcification in te rmiaire Reference nu
2、mber IEC 60938-2:1999(E) COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling ServicesNumbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. Consolidated publications Consolidated versions of some IEC publications inclu
3、ding amendments are available. For example, edition numbers 1 .O, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2. Validity of this publication The technical content of IEC publications
4、 is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to the date of the reconfirmation of the publication is available in the IEC catalogue. Information on the subjects under consideration and work in progress undertaken by the t
5、echnical committee which has prepared this publication, as well as the list of publications issued, is to be found at the following IEC sources: IEC web site Catalogue of IEC publications Published yearly with regular updates (On-line catalogue) Available both at the IEC web site and as a printed pe
6、riodical IEC Bulletin Terminology, graphical and letter symbols For general terminology, readers are referred to I EC 60050: International Electrotechnical Vocabulary (I EV) . For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to publication
7、s IEC 60027: Letter symbols to be used in electrical technology, IEC 60417: Graphical symbols for use on equipment. Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols for diagrams. See web site address on title page. COPYRIGHT International Electrotechnical Commissio
8、nLicensed by Information Handling ServicesSTD-IEC b0938-2-ENGL 1999 = 4844891 0712459 013 INTERNATIONAL STANDARD Fixed inductors for electromagnetic interference suppression - IEC 60938-2 QC 280100 Second edition 1999-1 1 Part 2: Sectional specification Inductances fixes dantiparasitage - Partie 2:
9、Spcification intermdiaire O IEC 1999 - Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnic
10、al Commission Telefax: +41 22 91 9 0300 3, rue de Varemb Geneva, Switzerland IEC web site http:/www.iec.ch e-mail: inmailiec.ch PRICECODE p For price. see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission MemnvHapoman KTPOTBXHHUCHR HOMHCCHR O COPY
11、RIGHT International Electrotechnical CommissionLicensed by Information Handling ServicesSTD-IEC b0938-2-ENGL 4844891 0732460 835 -2- CONTENTS 60938-2 8 IEC:1999(E) Page FOREWORD 3 Clause 1 General 5 1.1 Scope . 5 1.2 Object . 5 1.3 Normative references 5 1.4 Information to be given in a detail speci
12、fication 6 1.5 Definitions . 7 Preferred ratings and characteristics 7 2.1 Climatic categories 7 2.2 Values of ratings . 8 Quality assessment procedures 8 3.1 Primary stage of manufacture 8 3.2 Structurally similar inductors . 8 3.3 Certified records of released lots . 9 3.4 3.5 Quality conformance
13、inspection . 13 Test and measurement procedures 13 I 1.6 Marking . 7 2 3 Qualification approval . 9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.1 1 4.12 4.13 4.14 4.1 5 4.16 4.1 7 4.18 4.19 4.20 4.21 Visual examination and check of dimensions . 13 Voltage proof 14 Insulation resistance . 14 Inducta
14、nce 15 DC line resistance . 15 Robustness of terminations . 15 Resistance to soldering heat . 15 Solderability 15 Rapid change of temperature 15 Vibration . 16 Bump 16 Shock . 17 Container sealing 17 Damp heat, steady state 18 Temperature rise (applies only to inductors with a mass 5 g) . 18 Enduran
15、ce 20 Component solvent resistance (if applicable) . 21 Solvent resistance of marking (if applicable) 21 Climatic sequence . 17 Impulse voltage (applies to inductors with more than one winding) . 19 Passive flammability (if applicable) 21 Annex A (normative) Test schedule for safety tests only appro
16、val 22 Annex 6 (normative) Test schedule for safety tests and performance tests for qualification approval. assessment level D . 25 Annex C (normative) Example of a suitable circuit for the endurance test voltage 29 Annex D (normative) Declaration of design (confidential to the manufacturer and the
17、ce rtif cat ion body) . 30 COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling Services60938-2 O IEC:1999(E) -3- INTERNATIONAL ELECTROTECHNICAL COMMISSION - _ FDIS Report on voting 4011 11 1IFDIS 4011 137/RV FIXED INDUCTORS FOR ELECTROMAGNETIC Part 2: Sectional specif
18、ication INTERFERENCE SUPPRESSION - FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all ques
19、tions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participat
20、e in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement betw
21、een the two organizations. 2) The formal decisions or agreements of the 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 National Committees, 3) The documents
22、produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees
23、undertake to apply I EC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking
24、procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be
25、held responsible for identifying any or all such patent rights. International Standard IEC 60938-2 has been prepared by IEC technical committee 40: Capacitors and resistors for electronic equipment. This second edition cancels and replaces the first edition published in 1988. The text of this standa
26、rd is based on the following documents: 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 ISOAEC Directives, Part 3. The QC number that appears on the front cove
27、r of this publication is the specification number in the IEC Quality Assessment System for Electronic Components (IECQ). Annexes A, 6, C and D form an integral part of this standard. COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling Services-4- 60938-2 O IEC:1999(E)
28、 The committee has decided that this publication remains valid until 2005. At this date, in accordance with the committees decision, the publication will be reconfirmed; 0 withdrawn; replaced by a revised edition, or 0 amended. A bilingual version of this publication may be issued at a later date. C
29、OPYRIGHT International Electrotechnical CommissionLicensed by Information Handling Services60938-2 O IEC:1999(E) -5- FIXED INDUCTORS FOR ELECTROMAGNETIC INTERFERENCE SUPPRESSION - Part 2: Sectional specification 1 General 1.1 Scope This International Standard applies to fixed inductors designed for
30、electromagnetic interference suppression and which fall within the scope of the generic specification, IEC 60938-1. It is restricted to fixed inductors for which safety tests are appropriate. This implies that inductors specified according to this specification will either be connected to mains supp
31、lies, when compliance with the mandatory tests of table 1 is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required. This standard applies to fixed inductors which will be connected to an a.c. mains or other supp
32、ly with a nominal voltage not exceeding 1 O00 V a.c. (r.m.s.) or d.c. between conductors and with a nominal frequency not exceeding 400 Hz. 1.2 Object The object of this standard is to prescribe standard requirements for safety tests and standard ratings and characteristics, to select from IEC 60938
33、-1 the appropriate methods of test and to give general performance requirements for suppression inductors. Test severities and performance requirements prescribed in detail specifications referring to this sectional specification shall be of equal or higher performance level. In addition, the minimu
34、m require- ments for safety tests specified herein always apply. 1.3 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of,
35、 any of these publications do not apply. However, 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. For undated references, the latest edition of the normative docu
36、ment referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60060-1 :1989, High-voltage test techniques - Part I: General definitions and test requirements IEC 60063: 1 963, Preferred number series for resistors and capacitors Amendment 1 (1967
37、) Amendment 2 (1 977) I EC 60085: 1 984, Thermal evaluation and classification of electrical insulation IEC 60279:1969, Measurement of the winding resistance of an a.c. machine during operation at alternative voltage IEC 60938-1 :1999, Fixed inductors for electromagnetic interference suppression - P
38、art 1: Generic specification IS0 3:1973, Preferred numbers - Series of preferred numbers COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling Services-6- 60938-2 Q IEC:1999(E) 1.4 1.4.1 General Information to be given in a detail specification Detail specifications sha
39、ll be derived from the relevant blank detail specification. Detail specifications shall not specify requirements inferior to those of the generic or sectional specification. When more severe requirements are included they shall be listed in 1.8 of the detail specification and indicated in the test s
40、chedules, for example by an asterisk. NOTE -The information given in 1.4.2 may, for convenience, be presented in tabular form. The information given in 1.4.2 to 1.4.5 shall be given in each detail specification and the values quoted shall preferably be selected from those given in the appropriate cl
41、ause of this sectional specif ication. 1.4.2 Outline drawing and dimensions There shall be an illustration of the inductor as an aid to easy recognition and for comparison of the inductor with others. Dimensions and their associated tolerances, which affect interchangeability and mounting, shall be
42、indicated upon the drawing. All dimensions shall be stated in millimetres. Normally the numerical values shall be given for the length of the body, the width and height of the body or for cylindrical types, the body diameter, and the length and diameter of the terminations. When necessary, for examp
43、le when a number of items (inductance valued voltage ranges) are covered by a detail specification, the dimensions and their associated tolerances shall be placed in a table below the drawing. When the configuration is other than described above, the detail specification shall state such dimensional
44、 information as will adequately describe the inductor. When the inductor is not designed for use on printed boards, this shall be clearly stated in the detail specification. 1.4.3 Mounting The detail specification shall specify the method of mounting to be recommended for normal use and the method w
45、hich is mandatory for the application of the vibration, bump and shock tests. The design of the inductor may be such that special mounting fixtures are required in its use. In this case, the detail specification shall describe the mounting fixtures and they shall be used in the application of the bu
46、mp, shock and vibration tests. The specified heat sink shall be used in the application of the endurance test. 1.4.4 Ratings and characteristics The ratings and characteristics shall be in accordance with the relevant clauses of this specif cat ion. 1.4.4.1 Additional characteristics may be listed,
47、when they are considered necessary to specify adequately the inductor for design and application purposes. 1.4.5 Marking Deviations from 1.6 of this sectional specification, shall be specifically stated in the detail specif ication. COPYRIGHT International Electrotechnical CommissionLicensed by Info
48、rmation Handling ServicesSTD-IEC 60738-2-ENGL 1779 9 4844873 0715465 317 w 60938-2 O IEC:1999(E) -7- 1.5 Definitions For the purpose of this International Standard, the definitions in IEC 60938-1 apply. 1.6 Marking 1.6.1 relative importance of each item is indicated by its position in the list: The
49、information given in the marking is normally selected from the following list; the I. manufacturers name (or trade mark); manufacturers type designation; recog n zed approval mark; rated inductance and tolerance; rated voltage; rated current; identification of terminations rated temperature; climatic category; year and month (or week) of or circuit diagram; manufacture (this may be in code form); reference to the detail specification. 1.6.2 Marking of the inductor may be omitted when the manufacturer considers that there is insufficient space, and this fac
