1、BRITISH STANDARD BS EN 143004:1992 Incorporating Amendment No.1 Specification for Harmonized system of quality assessment for electronic components Blankdetail specification: directly heated negative temperature coefficient thermistors (Rod type) The European Standard EN143004:1991 has the status of
2、 a British StandardBSEN143004:1992 BSI10-1999 ISBN 0 580 35545 4 Amendments issued since publication Amd. No. Date of issue Comments 7381 December 1992 Indicated by a sideline in the marginBSEN143004:1992 BSI 10-1999 i Contents Page National foreword ii Foreword iii Text of CECC43004 1BSEN143004:199
3、2 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Committee. It is identical with CENELEC Electronic Components Committee CECC43004: “Blank detail specification: Directly heated negative temperature coefficient therm
4、istors (Rod type)”. This standard is a harmonized specification within the CECC system. In 1991 the CENELEC Electronic Components Committee (CECC) accepted CECC43004:1983 as European Standard EN143004:1991. Terminology and conventions The text of the CECC specification has been approved as suitable
5、for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards. Attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practic
6、e to use a full point on the baseline as the decimal marker. Cross-references The British Standard harmonized with CECC00100 is BS9000 “General requirements for a system for electronic components of assessed quality”. Scope This standard lists the ratings, characteristics and inspection requirements
7、 which shall be included as mandatory requirements in accordance with BS CECC43000. Detail specification layout In the event of conflict between the requirements of this specification and the provisions of BS9000 the latter shall take precedence except that the front page layout will be in accordanc
8、e with BS9000 Circular Letter No15. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Inter
9、national Standard Corresponding British Standard CECC43000:1982 BS CECC43000:1982 Harmonized system of quality assessment for electronic components: Generic specification: Directly heated negative temperature coefficient thermistors (Identical) IEC68-2-20A:1970 BS2011: Basic environmental testing pr
10、ocedures Part2.1Tb:1977 Test Tb Resistance to soldering heat (Identical) IEC410:1973 BS6001:1972 Sampling procedures and tables for inspection by attributes (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theENtitle page, page 2,
11、the CECC title page, pagesii toiv, pages 1 to 8 andabackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN143004 October1991
12、UDC: Descriptors: Quality, electronic components, thermistors English version Blank Detail Specification: Directly heated negative temperature coefficient thermistors (Rod type) Spcification Particulire Cadre: Thermistances coefficient de temprature ngatif chauffage direct (Type btonnets) Vordruck f
13、r Bauartspezifikation: Direkt geheizte temperaturabhngige Widerstnde mit negativen Temperatur- Koeffizienten (Stabform) This European Standard was approved by the CENELEC Electronic Components Committee (CECC) on 14 October 1991. The text of this standard consists of the text of CECC43004 Issue1 198
14、3 of the corresponding CECC Specification. CENELEC members are bound to comply with 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 s
15、uch national standards may be obtained on application to the General Secretariat of the CECC 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
16、into its own language and notified to the CECC General Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Port
17、ugal, Spain, Sweden, Switzerland, and United Kingdom. The membership of the CECC is identical, with the exception of the national electrotechnical committees of Greece, Iceland and Luxembourg. CECC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechniqu
18、e Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1991 Copyright reserved to CENELEC members Ref.No.EN143004:1991E2 blankEN143004:1991 ii BSI 10-1999 Contents Page Foreword iii 1 Ratings and characteristics 1 2 Marking 1 3 Related documents 1
19、 4 Ordering information 1 5 Certified test records 1 6 Additional information 1 7 Inspection requirements 1 Table 1 iv Table 2 2EN143004:1991 BSI 10-1999 iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnic
20、al Standardization (CENELEC) who wish to take part in a harmonized System for electronic components of assessed quality. The object of the System is to facilitate international trade by the harmonization of specifications and quality assessment procedures for electronic components, and by the grant
21、of an internationally recognised Mark, or Certificate, of Conformity. The components produced under the System are thereby accepted by all member countries without further testing. This specification has been formally approved by the CECC and has been prepared for those countries taking part in the
22、System who wish to issue national harmonized specifications for DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS. It should be read in conjunction with document CECC00100: Basic-Rules (1974). Preface This blank detail specification was prepared by CECC Working Group4:“RESISTORS”. It is o
23、ne of a series of blank detail specifications for directly heated negative temperature coefficient thermistors, all relating to the generic specification CECC43000. Voting The text of this blank detail specification was circulated to the CECC for voting in the documents listed below and was ratified
24、 by the President of the CECC for printing as a CECC Specification: Key for pageiv The numbers between square brackets on pageiv correspond to the following indications which shall be given: Identification of the detail specification (DS) Identification of the thermistor Document Date of Vote Report
25、 on the Voting CECC(Secretariat)886 April 1980 CECC(Secretariat)998 1 The name of the National Standards Institution under whose authority the detail specification (DS) is published and, if applicable, the organization from whom the DS is available. 2 The CECC symbol and the number allotted to the D
26、S by the CECC General Secretariat. 3 The number and issue number of the CECC generic or sectional specification as relevant; also national reference if different. 4 If different from the CECC number, the national number of the DS, date of issue and any further information required by the national sy
27、stem, together with any amendment numbers. 5 A short description of the type of thermistor. 6 Information on typical construction (where applicable). 7 Outline drawing with main dimensions which are of importance for interchangeability and/or reference to the national or international documents for
28、outlines. Alternatively, this drawing may be given in anappendix to the detail specification. 8 Application or group of applications covered, or, preferably, the level of quality assessment covered by the detail specification. 9 Reference data on the most important properties, to allow comparison be
29、tween the various thermistor types.EN143004:1991 iv BSI 10-1999 For 5 and 6 the text to be given in the DS should be suitable for an entry in CECC00200 (QPL) or CECC00300. Specification available from:- 1 CECC43004 XXX 2 Page of 4 ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: 3 Outli
30、ne and dimensions:- (SeeTable 1) (First angle projection) 7 DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS 5 ROD TYPE 6 INSULATED/NON-INSULATED HUMIDITY PROOF/NON-HUMIDITY PROOF Reference temperature: C ASSESSMENT LEVEL “S” 8 NOTE 1Other shapes are permitted within the dimensions given
31、. NOTE 2The non-dimensioned details do not affect the performance of the device. NOTE 3The leads are (not) suitable for soldering. NOTE 4The leads are (not) suitable for printed wiring applications. Table 1 9 Style B-value a Range of rated resistance values Rated dissipation (W) Dissipation Factor T
32、ime Constant Dimensions (mm) / Body Terminations R min R max L D l d a Values shall be chosen from the E-series of IEC63. Where the use of intermediate values is essential, they shall be chosen from a series in that document. Information about manufacturers who have components qualified to this deta
33、il specification is available in the current CECC00200: Qualified Products ListEN143004:1991 BSI 10-1999 1 1 Ratings and characteristics 1.1 Derating Thermistors covered by this specification are derated according to: (Derating curve to be included in the detail specification.) 2 Marking The marking
34、 of the component and package shall be in accordance with the requirements of 2.4 of CECC43000. (If the thermistor is so small that it cannot be marked this shall be stated in the detail specification). 3 Related documents National Authorized Institutions (ONH) will complete this section, making ref
35、erence to any documents, recommendations or specifications directly referred to in their national equivalent of this document. 4 Ordering information Orders for thermistors covered by this specification shall contain the following information: Resistance value Tolerance B-value Style and national sp
36、ecification number of this detail specification. 5 Certified test records National Authorized Institutions (ONH) shall indicate in this clause whether certified test records shall be prepared in accordance with 3.4 of CECC43000. 6 Additional information (not for inspection purposes) The detail speci
37、fication may include information (which is not required to be verified by the inspection procedure), such as circuit diagrams, curves, drawings and notes for clarification of the detail specification. 7 Inspection requirements (See Table 2) Drying clause is not applicable to thermistors manufactured
38、 in accordance with this detail specification. Standard selection tolerances % Climatic category / Bump orShock 4000 bumps at390m/s 2(1333 in each of3 directions). 490m/s 2 ,11ms, half sine wave Vibration 10Hz to55Hz or 10Hz to500Hz ;0,75mm or98m/s 2 (whichever is the less severe) Limit of resistanc
39、e change after1000h endurance test % B-value tolerance % Resistance ratio (The ratio shall be specified if applicable). Resistance/temperature characteristic (The applicable temperatures and resistance tolerances shall be specified.) Proof voltage (insulated thermistors only) V a.c. peak (Voltage to
40、 be applied in Sub-Groups B1, C2 and D1 for the voltage proof test.)EN143004:1991 2 BSI 10-1999 Table 2 (See Notes1 and2) Clause number and test Conditions of test I L A Q L Performance requirements Group A Inspection To be conducted on a sampling basis, lot-by-lot Sub-Group A1 (Non-destructive) II
41、1,0% 4.3.1 4.3.2 Visual examination Marking As in 4.3.1 As in 4.3.2 Sub-Group A2 (Non-destructive) S-4 1,0% 4.3.3 Dimensions (gauging) As specified in Table 1 Sub-Group A3 (Non-destructive) II 1,0% 4.4 Zero-power resistance Measurement temperature C As in 4.4.3 Group B Inspection To be conducted on
42、a sampling basis, lot-by-lot Sub-Group B1 (Non-destructive) S-3 1,0% 4.7 Voltage proof (Insulated thermistors only) Method1,2 or3 may be used Applied voltage: V a.c. peak As in 4.7.4 Sub-Group B2 (Destructive) S-3 2,5 % 4.13.1 Soldering Solderability (Applicable only if Note3 on page1 states that th
43、e terminations are suitable for soldering) As in 4.13.1.1 The terminations shall be uniformly tinned. Notes on page 8EN143004:1991 BSI 10-1999 3Table 2 (See Notes1,2 and3) Clause number and test Conditions of test I L A Q L Performance requirements Sub-Group B3 (Non-destructive) II 1,5 % 4.8 Resista
44、nce/ temperature characteristic (This test is applicable only where resistance/temperature performance is specified other than as a tolerance on B-value.) See Ratings and Characteristics for the temperatures and resistance tolerances to be used. As in 4.8.4 Sample size & criterion of acceptability P
45、 n c Group C Inspection To be conducted on a sampling basis at the periodicity given in column “P” Sub-Group C1 (Non-destructive) 3 20 1 This Sub-Group is not applicable if Sub-Group B3 is performed. 4.5 B-value or resistance ratio T 1 C T 2 C (See also 2.2.10 and 2.2.11 of CECC43000) The values sha
46、ll be within the limits specified in the detail specification Sub-Group C2 (Destructive) 3 20 1 4.12 Robustness of terminations Half of the sample Tensile, bending and torsiontests Visual examination Zero-power resistance (Temperature C) As in 4.12.4 %R:k %R Notes on page 8EN143004:1991 4 BSI 10-199
47、9Table 2 (See Notes1,2 and3) Clause number and test Conditions of test Sample size & criterion of acceptability Performance requirements P n c 4.13.2 4.14 4.15 Soldering Resistance to soldering heat Rapid change of temperature Vibration (The detail specification shall indicate whether Method1A or Me
48、thod1B of test Tb of IEC68 2-20A shall apply). Visual examination Zero-power resistance (Temperature: C) Other half of the sample T A : Lower category temperature T B : Upper category temperature Visual examination Zero-power resistance (Temperature: C) Procedure: B4 Frequency range: Hz to Hz Amplit
49、ude: 0,75mm or98m/s 2 (whichever is the less severe) Sweep endurance: Total duration: 6h (See Note4) Measurements during test Continuity As in 4.13.2.3 %R: k %R As in 4.14.3 %R: k %R There shall be no intermittency greaterthan0,5ms Notes on page 8EN143004:1991 BSI 10-1999 5Table 2 (See Notes1 and3) Clause number and test Conditions of test Sample size & criterion of acceptability Performance requirem
