1、Directly heated negative temperature coefficient thermistorsPart 1: Generic specificationBS EN 60539-1:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 60539-1:2016. It isidentical to IEC 60539-
2、1:2016. It supersedes BS EN 60539-1:2008 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/40X, Capacitors and resistors for electronic equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publ
3、ication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83884 2ICS 31.040.30Compliance with a British Standard cannot confer immunity
4、 fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60539-1:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60539-
5、1 July 2016 ICS 31.040.30 Supersedes EN 60539-1:2008 English Version Directly heated negative temperature coefficient thermistors - Part 1: Generic specification (IEC 60539-1:2016) Thermistances coefficient de temprature ngatif chauffage direct - Partie 1: Spcification gnrique (IEC 60539-1:2016) Dir
6、ekt geheizte temperaturabhngige Widerstnde mit negativem Temperaturkoeffizienten - Teil 1: Fachgrundspezifikation (IEC 60539-1:2016) This European Standard was approved by CENELEC on 2016-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
7、ons 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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exis
8、ts 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the nati
9、onal electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Por
10、tugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1
11、000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60539-1:2016 E BS EN 60539-1:2016EN 60539-1:2016 2 European foreword The text of document 40/2430/FDIS, future edition 3 of IEC 60539-1, prepared by IEC/TC 40 “Capaci
12、tors and resistors for electronic equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60539-1:2016. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endo
13、rsement (dop) 2017-03-01 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-06-01 This document supersedes EN 60539-1:2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
14、ELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60539-1:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following no
15、tes have to be added for the standards indicated: IEC 60027-1 NOTE Harmonized as EN 60027-1. ISO 80000-1:2009 NOTE Harmonized as EN ISO 80000-1:2013 (not modified). BS EN 60539-1:2016EN 60539-1:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding Eu
16、ropean publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendmen
17、ts) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Tit
18、le EN/HD Year IEC 60062 - Marking codes for resistors and capacitors EN 60062 - IEC 60068-1 2013 Environmental testing - Part 1: General and guidance EN 60068-1 2014 IEC 60068-2-1 - Environmental testing - Part 2-1: Tests - Test A: Cold EN 60068-2-1 - IEC 60068-2-2 - Environmental testing - Part 2-2
19、: Tests - Test B: Dry heat EN 60068-2-2 - IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 - IEC 60068-2-11 - Basic environmental testing procedures - Part 2-11: Tests - Test Ka: Salt mist EN 60068-2-11 - IEC 60068-2-14 - Environmental testing -
20、Part 2-14: Tests - Test N: Change of temperature EN 60068-2-14 - IEC 60068-2-17 - Basic environmental testing procedures - Part 2-17: Tests - Test Q: Sealing EN 60068-2-17 - IEC 60068-2-20 - Environmental testing - Part 2-20: Tests - Test T: Test methods for solderability and resistance to soldering
21、 heat of devices with leads EN 60068-2-20 - IEC 60068-2-21 - Environmental testing - Part 2-21: Tests - Test U: Robustness of terminations and integral mounting devices EN 60068-2-21 - IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock EN 60068-2-27 - BS EN 60539
22、-1:2016EN 60539-1:2016 4 Publication Year Title EN/HD Year IEC 60068-2-31 - Environmental testing - Part 2-31: Tests - Test Ec: Rough handling shocks, primarily for equipment-type specimens EN 60068-2-31 - IEC 60068-2-38 - Environmental testing - Part 2-38: Tests - Test Z/AD: Composite temperature/h
23、umidity cyclic test EN 60068-2-38 - IEC 60068-2-45 1980 Basic environmental testing procedures - Part 2-45: Tests - Test XA and guidance: Immersion in cleaning solvents EN 60068-2-45 1992 + A1 1993 + A1 1993 IEC 60068-2-52 - Environmental testing - Part 2-52: Tests - Test Kb: Salt mist, cyclic (sodi
24、um chloride solution) EN 60068-2-52 - IEC 60068-2-54 - Environmental testing - Part 2-54: Tests - Test Ta: Solderability testing of electronic components by the wetting balance method EN 60068-2-54 - IEC 60068-2-58 - Environmental testing - Part 2-58: Tests - Test Td: Test methods for solderability,
25、 resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD) EN 60068-2-58 - IEC 60068-2-69 - Environmental testing - Part 2: Tests - Test Te: Solderability testing of electronic components for surface mounting devices (SMD) by the wetting balance method EN 600
26、68-2-69 - IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60068-2-78 - IEC 60294 - Measurement of the dimensions of a cylindrical component with axial terminations EN 60294 - IEC 60717 - Method for the determination of the space required by capacitors
27、 and resistors with unidirectional terminations EN 60717 - IEC 61193-2 - Quality assessment systems - Part 2: Selection and use of sampling plans for inspection of electronic components and packages EN 61193-2 - IEC 61249-2-7 - Materials for printed boards and other interconnecting structures - Part
28、 2-7: Reinforced base materials, clad and unclad - Epoxide woven E-glass laminated sheet of defined flammability (vertical burning test), copper-clad EN 61249-2-7 - BS EN 60539-1:2016 2 IEC 60539-1:2016 IEC 2016 CONTENTS FOREWORD . 7 1 Scope 9 2 Normative references. 9 3 Terms and definitions 10 4 G
29、eneral items 20 4.1 Units and symbols . 20 4.2 Preferred values and appropriate category . 20 4.2.1 General . 20 4.2.2 Appropriate category 20 4.3 Marking . 20 4.3.1 General . 20 4.3.2 Marking for small size types such as surface mount thermistors 21 4.3.3 Coding . 21 4.4 Quality assessment procedur
30、es . 21 5 Test and measurement procedures 21 5.1 General . 21 5.2 Standard atmospheric conditions for testing . 21 5.3 Drying and recovery 22 5.3.1 Drying 22 5.3.2 Recovery . 22 5.4 Mounting (for surface mount thermistors only) 22 5.4.1 General . 22 5.4.2 Substrate and pad 22 5.4.3 Mounting on board
31、 . 22 5.5 Visual examination and check of dimensions . 23 5.5.1 Visual examination . 23 5.5.2 Dimensions 24 5.6 Zero-power resistance . 24 5.6.1 General . 24 5.6.2 Measurement procedures . 24 5.6.3 Requirements 24 5.7 B-value or resistance ratio . 25 5.7.1 General . 25 5.7.2 Requirements 25 5.8 Insu
32、lation resistance (for insulated types only) . 25 5.8.1 General . 25 5.8.2 Test methods . 25 5.8.3 Applied voltage 27 5.8.4 Requirements 28 5.9 Voltage proof (for insulated types only) 28 5.9.1 General . 28 5.9.2 Test voltage . 28 5.9.3 Requirements 28 5.10 Resistance/temperature characteristic . 28
33、 5.10.1 General . 28 5.10.2 Test methods . 28 5.10.3 Requirements 28 BS EN 60539-1:2016IEC 60539-1:2016 IEC 2016 3 5.11 Dissipation factor () . 28 5.11.1 General . 28 5.11.2 Initial measurements 29 5.11.3 Test methods . 29 5.11.4 Requirements 30 5.12 Thermal time constant by ambient temperature chan
34、ge (a) . 30 5.12.1 General . 30 5.12.2 Initial measurements 30 5.12.3 Preconditioning 31 5.12.4 Test methods . 31 5.12.5 Final measurements and requirements . 31 5.12.6 Requirements 31 5.13 Thermal time constant by cooling after self-heating (c) . 31 5.13.1 General . 31 5.13.2 Initial measurements 3
35、1 5.13.3 Preconditioning 31 5.13.4 Test method . 32 5.13.5 Final measurements and requirements . 32 5.14 Robustness of terminations (not applicable to surface mount thermistors) 32 5.14.1 General . 32 5.14.2 Initial measurements 32 5.14.3 Test methods . 33 5.14.4 Test Ua1 Tensile . 33 5.14.5 Test Ub
36、 Bending (half the number of terminations) . 33 5.14.6 Test Uc Torsion (remaining terminations) . 33 5.14.7 Final measurements and requirements . 33 5.15 Resistance to soldering heat . 33 5.15.1 General . 33 5.15.2 Preconditioning 34 5.15.3 Test procedure . 34 5.15.4 Recovery . 34 5.15.5 Final inspe
37、ction, measurement and requirements 34 5.16 Solderability 34 5.16.1 General . 34 5.16.2 Test procedure . 34 5.16.3 Final inspection, measurements and requirements 35 5.17 Rapid change of temperature 35 5.17.1 General . 35 5.17.2 Initial measurements 35 5.17.3 Test procedures . 35 5.17.4 Final inspec
38、tion, measurements and requirements 35 5.18 Vibration . 36 5.18.1 General . 36 5.18.2 Initial measurements 36 5.18.3 Test procedures . 36 5.18.4 Final inspection, measurements and requirements 36 5.19 Shock . 36 5.19.1 General . 36 BS EN 60539-1:2016 4 IEC 60539-1:2016 IEC 2016 5.19.2 Initial measur
39、ements 36 5.19.3 Mounting 36 5.19.4 Test procedures . 36 5.19.5 Final inspection, measurements and requirements 37 5.20 Free fall 37 5.20.1 General . 37 5.20.2 Initial measurements 37 5.20.3 Test procedures . 37 5.20.4 Final inspection, measurements and requirements 37 5.21 Thermal shock 37 5.21.1 G
40、eneral . 37 5.21.2 Initial measurements 37 5.21.3 Test procedures . 37 5.21.4 Final inspection, measurements and requirements 37 5.22 Cold 38 5.22.1 General . 38 5.22.2 Initial measurements 38 5.22.3 Test procedures . 38 5.22.4 Final inspection, measurements and requirements 38 5.23 Dry heat 38 5.23
41、.1 General . 38 5.23.2 Initial measurements 38 5.23.3 Test procedures . 39 5.23.4 Final inspection, measurements and requirements 39 5.24 Damp heat, steady state 39 5.24.1 General . 39 5.24.2 Initial measurements 39 5.24.3 Test procedures . 39 5.24.4 Recovery . 40 5.24.5 Final inspection, measuremen
42、ts and requirements 40 5.25 Endurance 40 5.25.1 General . 40 5.25.2 Endurance at room temperature with applied continuous maximum current (Imax25) (for inrush current-limiting thermistors only) 40 5.25.3 Endurance at room temperature with applied cyclic maximum current (Imax25) (for inrush current-l
43、imiting thermistors only) . 41 5.25.4 Endurance at T3and Pmax. 42 5.25.5 Endurance at upper category temperature 43 5.25.6 Maximum permissible capacitance (for inrush current-limiting thermistors only) 43 5.26 Shear (adhesion) test (for surface mount thermistors only) . 45 5.26.1 General . 45 5.26.2
44、 Test conditions 45 5.26.3 Requirements 45 5.27 Substrate bending test (for surface mount thermistors only) . 46 5.27.1 General . 46 5.27.2 Initial measurements 46 5.27.3 Test procedures . 46 5.27.4 Final inspection and requirements 46 5.28 Component solvent resistance . 46 BS EN 60539-1:2016IEC 605
45、39-1:2016 IEC 2016 5 5.28.1 General . 46 5.28.2 Initial measurements 46 5.28.3 Test conditions 46 5.28.4 Requirements 47 5.29 Solvent resistance of marking 47 5.29.1 General . 47 5.29.2 Test conditions 47 5.29.3 Requirements 47 5.30 Salt mist . 47 5.30.1 General . 47 5.30.2 Test conditions 47 5.31 S
46、ealing . 47 5.32 Composite temperature/humidity cycle . 47 5.32.1 General . 47 5.32.2 Initial measurements 47 5.32.3 Test conditions 48 5.32.4 Final inspection, measurements and requirements 48 Annex A (normative) Interpretation of sampling plans and procedures as described in IEC 60410:1973 for use
47、 within quality assessment systems . 49 A.1 Clause and subclause numbers of IEC 60410:1973 49 Annex B (normative) Rules for the preparation of detail specifications for directly heated thermistors for electronic equipment for use within quality assessment systems . 50 B.1 Drafting . 50 B.2 Reference
48、 standard . 50 B.3 Circulation 50 Annex C (informative) Typical examples of mountings for measurements of directly heated thermistors 51 C.1 Mounting for surface mount thermistors . 51 Annex D (informative) Reference to IEC 60539-1:2008 . 53 Annex Q (normative) Quality assessment procedures . 54 Q.1
49、 General . 54 Q.2 Primary stage of manufacture 54 Q.3 Structurally similar components . 54 Q.4 Qualification approval procedures 55 Q.4.1 General . 55 Q.4.2 Test procedure for qualification approval 55 Q.4.3 Maintenance of qualification approval . 55 Q.5 Quality conformance inspection . 56 Q.6 Certified test records of released lots 56 Q.7 Delayed delivery . 56 Q.8 Release for delivery under qualification approval before the completion of group B tests 56 Q.9 Alternative test metho
