1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationVaristors for use in electronicequipment Part 1: Generic specificationBS EN 61051-1:2008BSI British StandardsIncorporating corrigendum March 2010National forewordThis British Sta
2、ndard is the UK implementation of EN 61051-1:2008. It isidentical to IEC 61051-1:2007. It supersedes BS CECC 42000:1978 and BS QC 420000:1992 which are withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/40X, Capacitors and resistors for electronic equipment.A l
3、ist of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 70387 4 ICS 31.040.99BRITISH STANDARDBS EN
4、61051-1:2008Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2009 Amendments/corrigenda issued since publicationDate Text affected31 March 2010 Supersessio
5、n text amended EUROPEAN STANDARD EN 61051-1 NORME EUROPENNE EUROPISCHE NORM November 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050
6、 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61051-1:2008 E ICS 31.040.99 Supersedes CECC 42 000:1978English version Varistors for use in electronic equipement - Part 1: Generic specification (IEC 61051-1:2007) V
7、aristances utilises dans les quipements lectroniques - Partie 1: Spcification gnrique (CEI 61051-1:2007) Varistoren zur Verwendung in Gerten der Elektronik - Teil 1: Fachgrundspezifikation (IEC 61051-1:2007) This European Standard was approved by CENELEC on 2008-10-01. CENELEC members are bound to c
8、omply 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 Central
9、Secretariat 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 Central Secretariat has the same status
10、 as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Pola
11、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. - 2 - Foreword The text of document 40/1775/CDV, future edition 2 of IEC 61051-1, prepared by IEC TC 40, Capacitors and resistors for electronic equipment, was submitted to the IEC-CENELEC parallel Unique A
12、cceptance Procedure and was approved by CENELEC as EN 61051-1 on 2008-10-01. This European Standard supersedes CECC 42 000:1978. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop
13、) 2009-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61051-1:2007 was approved by CENELEC as a European Standard without any modificat
14、ion. _ BS EN 61051-1:2008EN 61051-1:2008 (E)- 3 - Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition c
15、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60027 Series
16、 Letter symbols to be used in electrical technology EN 60027 Series IEC 60050 Series International Electrotechnical Vocabulary (IEV) - - IEC 60060-2 1994 High-voltage test techniques - Part 2: Measuring systems EN 60060-2 1994 IEC 60062 2004 Marking codes for resistors and capacitors EN 60062 + corr
17、. January 2005 2007 IEC 60068-1 + corr. October + A1 1988 1988 1992 Environmental testing - Part 1: General and guidance EN 60068-1 1994 IEC 60068-2-1 2007 Environmental testing - Part 2-1: Tests - Test A: Cold EN 60068-2-1 2007 IEC 60068-2-2 A1 A2 1974 1993 1994 Environmental testing - Part 2: Test
18、s - Tests B: Dry heat EN 60068-2-21)A1 A21993 1993 1994 IEC 60068-2-6 1995 Environmental testing - Part 2: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-62) 1995 IEC 60068-2-13 1983 Environmental testing - Part 2: Tests - Test M: Low air pressure EN 60068-2-13 1999 IEC 60068-2-14 + A1 1984 1986
19、 Environmental testing - Part 2: Tests - Test N: Change of temperatureEN 60068-2-14 1999 IEC 60068-2-20 + A2 1979 1987 Environmental testing - Part 2: Tests - Test T: Soldering HD 323.2.20 S33)1988 IEC 60068-2-21 2006 Environmental testing - Part 2-21: Tests - Test U: Robustness of terminations and
20、integral mounting devices EN 60068-2-21 2006 IEC 60068-2-27 1987 Environmental testing - Part 2: Tests - Test Ea and guidance: Shock EN 60068-2-27 1993 IEC 60068-2-29 1987 Environmental testing - Part 2: Tests - Test Eb and guidance: Bump EN 60068-2-29 1993 IEC 60068-2-30 2005 Environmental testing
21、- Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) EN 60068-2-30 2005 1) EN 60068-2-2, which includes supplement A:1976 to IEC 60068-2-2, and its amendments are superseded by EN 60068-2-2:2007, which is based on IEC 60068-2-2:2007. 2) EN 60068-2-6 is superseded by EN 60068-2-6:2008,
22、 which is based on IEC 60068-2-6:2007. 3)HD 323.2.20 S3 is superseded by EN 60068-2-20:2008, which is based on IEC 60068-2-20:2008. BS EN 61051-1:2008EN 61051-1:2008 (E)- 4 - Publication Year Title EN/HD Year IEC 60068-2-45 1980 Environmental testing - Part 2: Tests - Test XA and guidance: Immersion
23、 in cleaning solvents EN 60068-2-45 1992 IEC 60068-2-54 2006 Environmental testing - Part 2-54: Tests - Test Ta: Solderability testing of electronic components by the wetting balance method EN 60068-2-54 2006 IEC 60068-2-58 2004 Environmental testing - Part 2-58: Tests - Test Td: Test methods for so
24、lderability, resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD) EN 60068-2-58 + corr. December 2004 2004 IEC 60068-2-69 1995 Environmental testing - Part 2: Tests - Test Te: Solderability testing of electronic components for surface mount technology by
25、 the wetting balance method EN 60068-2-694) 1996 IEC 60068-2-78 2001 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60068-2-78 2001 IEC 60294 1969 Measurement of the dimensions of a cylindrical component having two axial terminations - - IEC 60410 1973 Sampling plans
26、 and procedures for inspection by attributes - - IEC 60617 Data-base Graphical symbols for diagrams - - IEC 60695-11-5 2004 Fire hazard testing - Part 11-5: Test flames - Needle-flame test method - Apparatus, confirmatory test arrangement and guidance EN 60695-11-5 2005 IEC 60717 1981 Method for the
27、 determination of the space required by capacitors and resistors with unidirectional terminations - - IEC 61249-2-7 2002 Materials for printed boards and other interconnecting structures - Part 2-7: Reinforced base materials, clad and unclad - Epoxide woven E-glass laminated sheet of defined flammab
28、ility (vertical burning test), copper-clad EN 61249-2-7 + corr. September 2002 2005 IEC QC 001002-3 -5)IEC Quality Assessment System for Electronic Components (IECQ) - Rules of Procedure - Part 3: Approval procedures - - ISO 1000 A1 1992 1998 SI units and recommendations for the use of their multipl
29、es and of certain other units - - 4) EN 60068-2-69 is superseded by EN 60068-2-69:2007, which is based on IEC 60068-2-69:2007. 5)Undated reference. BS EN 61051-1:2008EN 61051-1:2008 (E) 2 CONTENTS 1 General 7 1.1 Scope7 1.2 Object .7 1.3 Normative references 7 2 Technical data8 2.1 Units, symbols an
30、d terminology.8 2.2 Terms and definitions 9 2.3 Preferred values and characteristics13 2.4 Marking .13 2.4.1 General .13 2.4.2 Coding.14 3 Quality assessment procedures14 3.1 Qualification approval/quality assessment systems .14 3.2 Primary stage of manufacture14 3.3 Structurally similar components.
31、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 delivery15 3.5.3 Release for delivery before the completion of Group B tests16 3.6 Alternative test methods16 3.7 Unchecked parameters16 4 Test and measuremen
32、t 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 conditions 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
33、 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 current (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.
34、6.2 Tolerances 19 4.6.3 Measurement of the pulse current .19 4.7 Voltage under pulse condition .19 4.8 Capacitance 20 BS EN 61051-1:2008EN 61051-1:2008 (E) 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
35、resistance (for insulated varistors only) .21 4.10.1 Test procedure 21 4.10.2 Measurement and requirements.21 4.11 Robustness of terminations .22 4.11.1 General .22 4.11.2 Test Ua1 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 nu
36、mber of terminations)22 4.11.5 Test Ud Torque (for terminations with threaded studs or screws and for integral mounting devices).22 4.11.6 Visual examination 22 4.11.7 Final measurement22 4.12 Resistance to soldering heat .23 4.12.1 Preconditioning23 4.12.2 Test procedure 23 4.12.3 Recovery.23 4.12.
37、4 Final inspection, measurement and requirements 23 4.13 Solderability 23 4.13.1 Test procedure 23 4.13.2 Final inspection, measurements 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 requiremen
38、ts 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 25 4.16 Shock25 4.16.1 Initial measurement .25 4.16.2 Test procedure 25 4.16.3 Final inspection, measurement and requirements 25 4.17 Vibration25 4.17.1 Initial measuremen
39、t .25 4.17.2 Test procedure 26 4.17.3 Final inspection, measurement and requirements 26 4.18 Climatic sequence .26 4.18.1 Initial 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 pressure26 4.18.6 Damp heat, cyclic, Test Db, remainin
40、g cycles 26 4.18.7 Final inspection, measurement and requirements 27 4.19 Damp heat, steady state27 BS EN 61051-1:2008EN 61051-1:2008 (E) 4 4.19.1 Initial measurement .27 4.19.2 Test procedure 27 4.19.3 Final inspection, measurement and requirements 27 4.20 Fire hazard28 4.21 Endurance at upper cate
41、gory temperature.28 4.22 Solvent resistance of marking29 4.22.1 Test procedure 29 4.22.2 Requirements 29 4.23 Component solvent resistance.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 (n
42、ormative) Mounting for measurements of varistors32 Annex B (normative) Interpretation of sampling plans and procedures as described 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 ca
43、pacitors and resistors for electronic equipment 35 Figure 1 Shape of pulse current type 1 11 Figure 2 Shape of pulse current type 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
44、 Table 2 Accepted differences between specified and recorded pulse current values .19 Table 3 Force for wire terminations22 Table 4 Torque 22 Table 5 Number of cycles 27 BS EN 61051-1:2008EN 61051-1:2008 (E) 7 VARISTORS FOR USE IN ELECTRONIC EQUIPMENT Part 1: Generic specification 1 General 1.1 Scop
45、e 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 this standard is to establish standard terms, inspection procedures and methods of test for use in sectional and detail specifications for Qu
46、alification 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 latest edition of t
47、he referenced document (including any amendments) applies. IEC 60027 (all parts), Letter symbols to be used in electrical technology IEC 60050 (all parts), International Electrotechnical Vocabulary (IEV) IEC 60060-2:1994, High-voltage test techniques Part 2: Measuring systems IEC 60062:2004, Marking
48、 codes for resistors and capacitors. IEC 60068-1:1988, Environmental testing Part 1: General and guidance Amendment 1 (1992) IEC 60068-2-1:2007, Environmental testing Part 2: Tests Test A: Cold IEC 60068-2-2:1974, Environmental testing Part 2: Tests Tests B: Dry heat Amendment 1 (1993) Amendment 2 (
49、1994) IEC 60068-2-6:1995, Environmental testing Part 2: Tests Test Fc and guidance: Vibration (Sinusoidal) IEC 60068-2-13:1983, Environmental testing Part 2: Tests Test M: Low air pressure IEC 60068-2-14:1984, Environmental testing Part 2: Tests Test N: Change of temperature Amendment 1 (1986) IEC 60068-2-20:1979, Environmental testing Part 2: Tests Test T: Soldering Amendment 2 (1987) IEC 60068-2-21:2006, Environmental testing Part 2-21: Tests Test U: Robustness of termin
