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1、BRITISH STANDARD BS EN 62319-1:2005 Polymeric thermistors Directly heated positive step function temperature coefficient Part 1: Generic specification The European Standard EN 62319-1:2005 has the status of a British Standard ICS 31.040.30 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:
2、29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 62319-1:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006 ISBN 0 580 48724 5 National foreword This British Standard is the official English language version of E
3、N 62319-1:2005. It is identical with IEC 62319-1:2005. The UK participation in its preparation was entrusted to Technical Committee EPL/40X, Capacitors and resistors for electronic equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on re
4、quest to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI
5、 Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirer
6、s to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document co
7、mprises a front cover, an inside front cover, the EN title page, pages 2 to 34, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun
8、 sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62319-1 NORME EUROPENNE EUROPISCHE NORM March 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechn
9、ische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62319-1:2005 E ICS 31.040.30 English version Polymeric thermistors - Directly heated positive step funct
10、ion temperature coefficient Part 1: Generic specification (IEC 62319-1:2005) Thermistances polymres - Coefficient de temprature positif de fonction chelon chauffage direct Partie 1: Spcification gnrique (CEI 62319-1:2005) Temperaturabhngige Widerstnde aus Polymerwerkstoffen - Direkt geheizte tempera
11、turabhngige Widerstnde mit positivem Temperaturkoeffizienten Teil 1: Fachgrundspezifikation (IEC 62319-1:2005) This European Standard was approved by CENELEC on 2005-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eu
12、ropean 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 Secretariat or to any CENELEC member. This European Standard exists in three official versions (E
13、nglish, 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 as the official versions. CENELEC members are the national electrotechnical committees of Austri
14、a, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffie
15、ldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 40/1505/FDIS, future edition 1 of IEC 62319-1, prepared by IEC TC 40, Capacitors and resistors for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC a
16、s EN 62319-1 on 2005-02-01. 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) 2005-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn
17、 (dow) 2008-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62319-1:2005 was approved by CENELEC as a European Standard without any modification. _ 2 EN 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 20
18、06, Uncontrolled Copy, (c) BSI CONTENTS 1 General5 1.1 Scope5 1.2 Normative references 5 2 Technical data6 2.1 Units and symbols .6 2.2 Terms and definitions6 2.3 Preferred values 9 2.4 Marking.10 3 Quality assessment procedures 10 3.1 General.10 3.2 Primary stage of manufacture 10 3.3 Subcontractin
19、g 11 3.4 Structurally similar components .11 3.5 Qualification approval procedures 11 3.6 Rework and repair .17 3.7 Release for delivery.17 3.8 Certified test records of released lots.18 3.9 Delayed delivery18 3.10 Alternative test methods 18 3.11 Manufacture outside the geographical limits of IECQ
20、NSIs18 3.12 Unchecked parameters 18 4 Test and measurement procedures .18 4.1 Standard conditions for testing.18 4.2 Drying and recovery.19 4.3 Visual inspection and check of dimensions.19 4.4 Zero power resistance .20 4.5 Insulation resistance (for insulated types only) .20 4.6 Voltage proof (for i
21、nsulated types only) 21 4.7 Robustness of terminations (for leaded types only).21 4.8 Soldering.22 4.9 Mounting .22 4.10 Rapid change of temperature.23 4.11 Climatic sequence .23 4.12 Cycle life testing24 4.13 Trip endurance 26 4.14 Trip current .27 4.15 Hold current 27 4.16 Residual current and pow
22、er dissipation 28 4.17 Time-to-trip .28 4.18 Cold environmental electrical cycling29 4.19 Thermal runaway.29 3 EN 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Annex A (normative) Fixed sample size test schedules for qualifica
23、tion approval.30 Annex B (normative) Vibration-, bump-, shock-, shear-, substrate bending test31 B.1 Vibration 31 B.2 Bump .31 B.3 Shock.32 B.4 Shear (adhesion) test .32 B.5 Substrate bending test32 Figure 1 Test schedule flow chart.14 Figure 2 Circuit for Trip endurance .27 Table 1 Fixed sample siz
24、e test schedule for qualification approval of Polymeric PTC thermistors for current limitation, assessment level EZ.15 Table 2 Quality conformance inspection for lot-by-lot inspection16 Table 3 Quality conformance inspection for periodic testing 17 Table 4 Loading weight for wire terminations 21 Tab
25、le 5 Number of cycles.24 4 Annex ZA (normative) Normative references to international publications with their corresponding European publications.33 EN 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI POLYMERIC THERMISTORS DIRECT
26、LY HEATED POSITIVE STEP FUNCTION TEMPERATURE COEFFICIENT Part 1: Generic specification 1 General 1.1 Scope This part of IEC 62319 prescribes terms and methods of test for polymeric positive temperature coefficient thermistors, insulated and non-insulated types, typically intended for use in current
27、limiting and overcurrent protection applications. It establishes standard terms, inspection procedures and methods of test for use in detail specifications for Qualification Approval and for Quality Assessment Systems for electronic components. 1.2 Normative references The following referenced docum
28、ents are indispensable for the application 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. IEC 60027-1: Letter symbols to be used in electrical technology Part 1: General
29、 IEC 60050: International Electrotechnical Vocabulary IEC 60068-1: Environmental testing Part 1: General and guidance IEC 60068-2-6: Environmental testing Part 2: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-14: Environmental testing Part 2: Tests Test N: Change of temperature IEC 60068-2-20: E
30、nvironmental testing Part 2: Tests Test T: Soldering IEC 60068-2-21: Environmental testing Part 2-21: Tests Test U: Robustness of terminations and integral mounting devices IEC 60068-2-27: Environmental testing Part 2: Tests Test Ea and guidance: Shock IEC 60068-2-29: Environmental testing Part 2: T
31、ests Test Eb and guidance: Bump IEC 60068-2-45: Environmental testing Part 2: Tests Test XA and guidance: Immersion in cleaning solvents IEC 60294: Measurement of the dimensions of a cylindrical component having two axial terminations IEC 60410: Sampling plans and procedures for inspection by attrib
32、utes. 5 EN 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IEC 60617-DB: 20011 Graphical symbols for diagrams IECQ 001003: IEC Quality Assessment System for Electronic Components Guidance documents IECQ 001002-3: IEC Quality Ass
33、essment System for Electronic Components Rules of Procedure Part 3: Approval procedures ISO 1000: SI units and recommendations for the use of their multiples and of certain other units 2 Technical data 2.1 Units and symbols Units, graphical symbols, letter symbols and terminology shall, whenever pos
34、sible, be taken from the following documents: IEC 60027 IEC 60050 IEC 60617 ISO 1000 The following subclauses contain additional terminology applicable to thermistors. Where further items are required they shall be derived in accordance with the principles of the documents listed above. 2.2 Terms an
35、d definitions For the purposes of this document, the following terms and definitions apply. 2.2.1 thermistor thermally sensitive semiconducting resistor whose primary function is to exhibit an important change in electrical resistance with a change in body temperature 2.2.2 positive temperature coef
36、ficient thermistor thermistor in which the resistance increases with increasing temperature throughout the useful part of its characteristic. The PTC thermistors covered in this specification typically exhibit a very sharp increase in resistance over a narrow temperature range 2.2.3 directly heated
37、positive temperature coefficient thermistor thermistor in which the change in temperature is obtained either by the flow of current through the thermo-sensitive element, or by a change in ambient temperature, or by a combination of both of these means _ 1 “DB” refers to the IEC on-line database. 6 E
38、N 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2.2.4 zero power resistance RT value of the resistance of a PTC thermistor, at a given temperature, under such conditions that the change in resistance due to the internal genera
39、tion of heat is negligible with respect to the total error of measurement NOTE Any resistance value of a PTC thermistor is dependent on the value and the mode of the applied voltage (AC or DC). 2.2.5 nominal zero power resistance Rn zero power resistance used as a reference value for which the follo
40、wing conditions should be given in the detail specification: a) reference temperature, preferably 25 C b) applied voltage (DC or AC) 2.2.6 resistance/temperature characteristics relationship between the zero power resistance of a thermistor and the temperature of the thermosensitive element when mea
41、sured under specified reference conditions 2.2.7 upper category temperature UCT maximum ambient operating temperature of the thermistor 2.2.8 lower category temperature LCT minimum ambient operating temperature of the thermistor 2.2.9 trip event event of rapid increasing resistance of the thermistor
42、 in response to an overcurrent surge 2.2.10 minimum initial resistance Rmin minimum resistance of the thermistor 2.2.11 maximum initial resistance Rmax maximum resistance of the thermistor before its initial trip event 2.2.12 maximum resistance 1 h after tripping R1max for leaded thermistors the max
43、imum resistance of the thermistor 1 h after its first trip event; for surface mount thermistors, the maximum resistance of the thermistor 1 h after reflow 2.2.13 maximum voltage Umax maximum AC or DC voltage which may be applied to the thermistor 7 EN 62319-1:2005 Licensed Copy: sheffieldun sheffiel
44、dun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2.2.14 operating temperature range at maximum voltage range of ambient temperatures at which the thermistor can operate at the maximum voltage 2.2.15 isolation voltage (applicable only to insulated thermistors) maximum peak volt
45、age which may be applied under continuous operating conditions between any of the thermistor terminations and any conducting surface 2.2.16 maximum current Imax value of current for the operating temperature range, which should not be exceeded 2.2.17 residual current Ires value of current in the tri
46、pped thermistor at a specified ambient temperature (preferably 25 C) under steady state conditions; the applied voltage is the maximum voltage unless otherwise specified 2.2.18 trip current It lowest current which will cause the thermistor to trip to its high resistance state at a specified temperat
47、ure (preferably 25 C) and within a time specified in the detail specification 2.2.19 hold current Ih the maximum current at specified ambient temperature, preferably 25 C, which will not cause the trip event 2.2.20 fault current Ifault current used when measuring time to trip 2.2.21 power dissipatio
48、n Pd product of the current flowing through a device and the voltage across it, under steady state conditions; the applied voltage is the maximum voltage unless otherwise specified 2.2.22 time-to-trip ttrip under specified ambient conditions, starting from the time the fault current (Ifault) is appl
49、ied, the time-to-trip is the time required for a device to switch into the tripped state 2.2.23 insulated thermistors thermistors capable of meeting the requirements of the insulation resistance and voltage proof tests when specified in the test schedule 8 EN 62319-1:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 17:29:39 GMT+00:00 2006, Unc