1、BRITISH STANDARDBS EN62319-1:2005Polymeric thermistors Directly heated positive step function temperature coefficient Part 1: Generic specificationThe European Standard EN 62319-1:2005 has the status of a British StandardICS 31.040.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g
2、51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSIBS EN 62319-1:2005This British Standard was published under the authority of the
3、Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48724 5National forewordThis British Standard is the official English language version of EN 62319-1:2005. It is identical with IEC 62319-1:2005. The UK participation in its preparation was entrusted to Technical Committee EP
4、L/40X, Capacitors and resistors for electronic equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in thi
5、s 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 Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a cont
6、ract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals f
7、or change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises 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 not
8、ice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 62319-1 NORME EUROPENNE EUROPISCHE NORM March 2005 CENELEC Eur
9、opean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische 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 f
10、or CENELEC members. Ref. No. EN 62319-1:2005 E ICS 31.040.30 English version Polymeric thermistors - Directly heated positive step function temperature coefficient Part 1: Generic specification (IEC 62319-1:2005) Thermistances polymres - Coefficient de temprature positif de fonction chelon chauffage
11、 direct Partie 1: Spcification gnrique (CEI 62319-1:2005) Temperaturabhngige Widerstnde aus Polymerwerkstoffen - Direkt geheizte temperaturabhngige Widerstnde mit positivem Temperaturkoeffizienten Teil 1: Fachgrundspezifikation (IEC 62319-1:2005) This European Standard was approved by CENELEC on 200
12、5-02-01. CENELEC members are bound to comply 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
13、obtained on application to the Central 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
14、Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Neth
15、erlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSIForeword The text of document 40/1505/FDIS, future edition 1 of IEC 62319-1, prepared by IEC TC 40, Capacitors an
16、d resistors for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as 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 end
17、orsement (dop) 2005-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (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
18、any modification. _ 2 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSICONTENTS 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 a
19、ssessment procedures 10 3.1 General .10 3.2 Primary stage of manufacture 10 3.3 Subcontracting 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 delivery
20、18 3.10 Alternative test methods 18 3.11 Manufacture outside the geographical limits of IECQ 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 res
21、istance .20 4.5 Insulation resistance (for insulated types only) .20 4.6 Voltage proof (for insulated 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.
22、13 Trip endurance 26 4.14 Trip current .27 4.15 Hold current 27 4.16 Residual current and power dissipation 28 4.17 Time-to-trip .28 4.18 Cold environmental electrical cycling29 4.19 Thermal runaway.29 3 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c)
23、 BSIAnnex A (normative) Fixed sample size test schedules for qualification 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 cha
24、rt.14 Figure 2 Circuit for Trip endurance .27 Table 1 Fixed sample size 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 p
25、eriodic testing 17 Table 4 Loading weight for wire terminations 21Table 5 Number of cycles.24 4 Annex ZA (normative) Normative references to international publications with their corresponding European publications. 33 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontr
26、olled Copy, (c) BSIPOLYMERIC THERMISTORS DIRECTLY 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-insulate
27、d types, typically intended for use in current 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 Norm
28、ative 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 the referenced document (including any amendments) applies. IEC 60027-1: Letter symbols to b
29、e used in electrical technology Part 1: General 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
30、Test N: Change of temperature IEC 60068-2-20: Environmental 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
31、IEC 60068-2-29: Environmental testing Part 2: Tests 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: Samplin
32、g plans and procedures for inspection by attributes. 5 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSIIEC 60617-DB: 20011Graphical symbols for diagrams IECQ 001003: IEC Quality Assessment System for Electronic Components Guidance documents IECQ 00
33、1002-3: IEC Quality Assessment 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 terminol
34、ogy shall, whenever possible, 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 lis
35、ted above. 2.2 Terms and 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 po
36、sitive temperature coefficient 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
37、 2.2.3 directly heated 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
38、 on-line database. 6 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSI2.2.4 zero power resistance RTvalue of the resistance of a PTC thermistor, at a given temperature, under such conditions that the change in resistance due to the internal generati
39、on 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 Rnzero power resistance used as a reference value for which the followin
40、g 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 measur
41、ed 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 in
42、 response to an overcurrent surge 2.2.10 minimum initial resistance Rminminimum resistance of the thermistor 2.2.11 maximum initial resistance Rmaxmaximum resistance of the thermistor before its initial trip event 2.2.12 maximum resistance 1 h after tripping R1maxfor leaded thermistors the maximum r
43、esistance 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 Umaxmaximum AC or DC voltage which may be applied to the thermistor 7 EN 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:
44、09:42 BST 2006, Uncontrolled Copy, (c) BSI2.2.14 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 voltage which may be applied under
45、 continuous operating conditions between any of the thermistor terminations and any conducting surface 2.2.16 maximum current Imaxvalue of current for the operating temperature range, which should not be exceeded 2.2.17 residual current Iresvalue of current in the tripped thermistor at a specified a
46、mbient temperature (preferably 25 C) under steady state conditions; the applied voltage is the maximum voltage unless otherwise specified 2.2.18 trip current Itlowest current which will cause the thermistor to trip to its high resistance state at a specified temperature (preferably 25 C) and within
47、a time specified in the detail specification 2.2.19 hold current Ihthe maximum current at specified ambient temperature, preferably 25 C, which will not cause the trip event 2.2.20 fault current Ifaultcurrent used when measuring time to trip 2.2.21 power dissipation Pdproduct of the current flowing
48、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 ttripunder specified ambient conditions, starting from the time the fault current (Ifault) is applied, the time-to-trip is the time req
49、uired 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 62319-1:2005Licensed Copy: Wang Bin, na, Fri Aug 25 03:09:42 BST 2006, Uncontrolled Copy, (c) BSI2.3 Preferred values 2.3.1 Climatic categories The thermistors covered by this specification are classified into climatic categories a
