1、 IEC 61051-1 Edition 2.0 2007-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Varistors for use in electronic equipment Part 1: Generic specification Varistances utilises dans les quipements lectroniques Partie 1: Spcification gnrique IEC 61051-1:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright
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15、que International (VEI) en ligne. Service Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61051-1 Edition 2.0 2007-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Varistors for use in electron
16、ic equipment Part 1: Generic specification Varistances utilises dans les quipements lectroniques Partie 1: Spcification gnrique INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE V ICS 31.040.99 PRICE CODE CODE PRIX ISBN 978-2-83220-138-1 Registered trademark of the
17、 International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61051-1 IE
18、C:2007 CONTENTS FOREWORD . 5 1 General 7 1.1 Scope 7 1.2 Object . 7 1.3 Normative references 7 2 Technical data 8 2.1 Units, symbols and terminology . 8 2.2 Terms and definitions 9 2.3 Preferred values and characteristics 13 2.4 Marking . 13 2.4.1 General . 13 2.4.2 Coding . 14 3 Quality assessment
19、procedures 14 3.1 Qualification approval/quality assessment systems . 14 3.2 Primary stage of manufacture 14 3.3 Structurally similar components . 14 3.4 Qualification approval procedures . 15 3.5 Quality conformance inspection . 15 3.5.1 Certified records of released lots . 15 3.5.2 Delayed deliver
20、y 15 3.5.3 Release for delivery before the completion of Group B tests 16 3.6 Alternative test methods 16 3.7 Unchecked parameters 16 4 Test and measurement procedures . 16 4.1 General . 16 4.2 Standard atmospheric conditions . 16 4.2.1 Standard atmospheric conditions for testing 16 4.2.2 Recovery c
21、onditions 17 4.2.3 Referee conditions 17 4.2.4 Reference conditions . 17 4.3 Drying and recovery 17 4.4 Visual examination and check of dimensions . 18 4.4.1 Visual examination 18 4.4.2 Marking . 18 4.4.3 Dimensions (gauging) 18 4.4.4 Dimensions (detail) 18 4.5 Nominal varistor voltage or leakage cu
22、rrent (not applicable to pulse measurements) . 18 4.5.1 Test procedure 18 4.5.2 Measurement and requirements. 18 4.6 Pulse current . 18 4.6.1 Standard pulse currents . 19 4.6.2 Tolerances 19 4.6.3 Measurement of the pulse current . 19 4.7 Voltage under pulse condition . 19 4.8 Capacitance 20 61051-1
23、 IEC:2007 3 4.9 Voltage proof (for insulated varistors only) 20 4.9.1 V-block method . 20 4.9.2 Metal ball method 20 4.9.3 Foil method . 21 4.10 Insulation resistance (for insulated varistors only) . 21 4.10.1 Test procedure 21 4.10.2 Measurement and requirements. 21 4.11 Robustness of terminations
24、. 22 4.11.1 General . 22 4.11.2 Test Ua 1 Tensile 22 4.11.3 Test Ub Bending (half of the number of terminations) . 22 4.11.4 Test Uc Torsion (other half of the number of terminations) 22 4.11.5 Test Ud Torque (for terminations with threaded studs or screws and for integral mounting devices) . 22 4.1
25、1.6 Visual examination 22 4.11.7 Final measurement 22 4.12 Resistance to soldering heat . 23 4.12.1 Preconditioning 23 4.12.2 Test procedure 23 4.12.3 Recovery . 23 4.12.4 Final inspection, measurement and requirements 23 4.13 Solderability 23 4.13.1 Test procedure 23 4.13.2 Final inspection, measur
26、ements and requirements 24 4.14 Rapid change of temperature 24 4.14.1 Initial measurement . 24 4.14.2 Test procedure 24 4.14.3 Final inspection, measurement and requirements 24 4.15 Bump 25 4.15.1 Initial measurement . 25 4.15.2 Test procedure 25 4.15.3 Final inspection, measurement and requirements
27、 25 4.16 Shock 25 4.16.1 Initial measurement . 25 4.16.2 Test procedure 25 4.16.3 Final inspection, measurement and requirements 25 4.17 Vibration 25 4.17.1 Initial measurement . 25 4.17.2 Test procedure 26 4.17.3 Final inspection, measurement and requirements 26 4.18 Climatic sequence . 26 4.18.1 I
28、nitial measurement . 26 4.18.2 Dry heat 26 4.18.3 Damp heat, cyclic, Test Db, first cycle . 26 4.18.4 Cold 26 4.18.5 Low air pressure 26 4.18.6 Damp heat, cyclic, Test Db, remaining cycles 26 4.18.7 Final inspection, measurement and requirements 27 4.19 Damp heat, steady state 27 4 61051-1 IEC:2007
29、4.19.1 Initial measurement . 27 4.19.2 Test procedure 27 4.19.3 Final inspection, measurement and requirements 27 4.20 Fire hazard 28 4.21 Endurance at upper category temperature . 28 4.22 Solvent resistance of marking 29 4.22.1 Test procedure 29 4.22.2 Requirements 29 4.23 Component solvent resista
30、nce . 29 4.23.1 Initial measurements . 29 4.23.2 Test procedure 29 4.23.3 Measurement and requirements. 30 4.24 Mounting (for surface mount varistors only) . 30 Annex A (normative) Mounting for measurements of varistors 32 Annex B (normative) Interpretation of sampling plans and procedures as descri
31、bed in IEC 60410 for use within the IEC quality assessment system for electronic components . 34 Annex C (normative) Rules for the preparation of detail specifications for capacitors and resistors for electronic equipment 35 Figure 1 Shape of pulse current type 1 11 Figure 2 Shape of pulse current t
32、ype 2 12 Figure A.1 Mounting methods for measurements . 32 Figure A.2 Mounting method for measurements of surface mount varistors 33 Table 1 Standard atmospheric conditions . 17 Table 2 Accepted differences between specified and recorded pulse current values . 19 Table 3 Force for wire terminations
33、22 Table 4 Torque 22 Table 5 Number of cycles 27 61051-1 IEC:2007 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ VARISTORS FOR USE IN ELECTRONIC EQUIPMENT Part 1: Generic specification FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comp
34、rising 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 end and in addition to other activities, IEC publishes International Stan
35、dards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this prep
36、aratory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organ
37、izations. 2) The formal decisions or agreements of 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 IEC National Committees. 3) IEC Publications have the form
38、of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretati
39、on by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regi
40、onal publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this pub
41、lication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect
42、, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication 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 co
43、rrect application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61051-1 has been prepared
44、 by IEC technical committee 40: Capacitors and resistors for electronic equipment. This second edition cancels and replaces the first edition published in 1991 and constitutes a minor revision related to tables, figures and references. This bilingual version (2012-06) corresponds to the monolingual
45、English version, published in 2007-04. The text of this standard is based on the following documents: CDV Report on voting 40/1775/CDV 40/1841/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. 6 61051-1 IEC:2007 Th
46、e French version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The list of all the parts of the IEC 61051 series, under the general title Varistors for use in electronic equipment, can be found on the IEC website. The c
47、ommittee has decided that the contents of this publication will remain unchanged until the maintenance result 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
48、revised edition, or amended. 61051-1 IEC:2007 7 VARISTORS FOR USE IN ELECTRONIC EQUIPMENT Part 1: Generic specification 1 General 1.1 Scope This part of IEC 61051 is applicable to varistors with symmetrical voltage-current characteristics for use in electronic equipment. 1.2 Object The object of thi
49、s standard is to establish standard terms, inspection procedures and methods of test for use in sectional and detail specifications for Qualification Approval and for Quality Assessment Systems for electronic components. 1.3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
