1、BRITISH STANDARD BS EN 143003:1992 Incorporating Amendment No. 1 Specification for Harmonized system of quality assessment for electronic components Blank detail specification Directly heated negative temperature coefficient thermistors (Disc type) The European Standard EN 143003:1991 has the status
2、 of a British StandardBSEN143003:1992 BSI 01-2000 ISBN 0 580 35962 X Amendments issued since publication Amd. No. Date of issue Comments 7380 December 1992 Indicated by a sideline in the marginBSEN143003:1992 BSI 01-2000 i Contents Page National foreword ii Foreword iii Text of CECC 43003 1BSEN14300
3、3:1992 ii BSI 01-2000 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 CECC 43003: “Blank detail specification: Directly heated negative temperature coefficient
4、 thermistors (Disc type)”. This standard is a harmonized specification within the CECC system. In 1991 the CENELEC Electronic Components Committee (CECC) accepted CECC 43003:1983 as European Standard EN 143003:1991. Terminology and conventions The text of the CECC specification has been approved as
5、suitable 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 curren
6、t practice to use a full point on the baseline as the decimal marker. Cross-references The British Standard harmonized with CECC 00100 is BS9000 “General requirements for a system for electronic components of assessed quality”. Scope This standard lists the ratings, characteristics and inspection re
7、quirements which shall be included as mandatory requirements in accordance with BS CECC 43000. Detail specification layout In the event of conflict between the requirements of this specification and the provisions of BS 9000 the latter shall take precedence except that the front page layout will be
8、in accordance with BS 9000 Circular Letter No 15. 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 obli
9、gations. International Standard Corresponding British Standard CECC 43000:1982 BS CECC 43000:1982 Harmonized system of quality assessment for electronic components: Generic specification: Directly heated negative temperature coefficient thermistors (Identical) IEC 68-2-20A:1970 BS 2011 Basic environ
10、mental testing procedures: Part2.1Tb:1977 Test Tb Resistance to soldering heat (Identical) IEC 410:1973 BS 6001:1972 Sampling procedures and tables for inspection by attributes (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the
11、EN title page, page 2, the CECC title page, pages ii to vi, pages 1 to 6 and aback cover. 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
12、 NORM EN 143003 October 1991 UDC: Descriptors: Quality, electronic components, thermistors English version Blank Detail Specification: Directly heated negative temperature coefficient thermistors (Disk type) Spcification Particulire Cadre: Thermistances coefficient de temprature ngatif chauffage dir
13、ect (Type disque) Vordruck fr Bauartspezifikation: Direkt geheizte temperaturabhngige Widerstnde mit negativen Temperatur- Koeffizienten (Scheibenform) This European Standard was approved by the CENELEC Electronic Components Committee (CECC) on 14 October 1991. The text of this standard consists of
14、the text of CECC 43003 Issue 1 1983 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 bibli
15、ographical references concerning such 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 r
16、esponsibility of a CENELEC member 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, Lux
17、embourg, Netherlands, Norway, Portugal, 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 Europe
18、n de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1991 Copyright reserved to CENELEC members Ref. No. EN 143003:1991 E2 blankEN143003:1991 ii BSI 01-2000 Contents Page Foreword iii 1 Ratings and characteristi
19、cs 1 2 Marking 1 3 Related documents 1 4 Ordering information 1 5 Certified test records 1 6 Additional information 1 7 Inspection requirements 1 Table 1 v Table 2 2EN143003:1991 BSI 01-2000 iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the
20、European Committee for Electrotechnical 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 ele
21、ctronic components, and by the grant 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 fo
22、r those countries taking part in the System who wish to issue national harmonized specifications for DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS. It should be read in conjunction with document CECC 00100: Basic Rules (1974). Preface This blank detail specification was prepared by CE
23、CC Working Group 4: “RESISTORS”. It is one of a series of blank detail specifications for directly heated negative temperature coefficient thermistors, all relating to the generic specification CECC 43000. Voting The text of this blank detail specification was circulated to the CECC for voting in th
24、e documents listed below and was ratified by the President of the CECC for printing as a CECC specification: Document Date of Vote Report on the Voting CECC(Secretariat)885 April 1980 CECC(Secretariat)997EN143003:1991 iv BSI 01-2000 Key for page v The numbers between square brackets on page v corres
25、pond to the following indications which shall be given: Identification of the detail specification (DS) 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 sym
26、bol and the number allotted to the DS 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 inf
27、ormation required by the national system, together with any amendment numbers. Identification of the thermistor 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 interchangeabi
28、lity and/or reference to the national or international documents for outlines. Alternatively, this drawing may be given in an appendix to the detail specification. 8 Application or group of applications covered, or, preferably, the level of quality assessment covered by the detail specification. 9 R
29、eference data on the most important properties, to allow comparison between the various thermistor types. For 5 and 6 the text to be given in the DS should be suitable for an entry in CECC 00200 (QPL) or CECC 00300.EN143003:1991 BSI 01-2000 v NOTE 1Other shapes are permitted within the dimensions gi
30、ven. 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. Specification available from:- 1 CECC 43003 xxx 2 Page of 4 ELECTRONIC COMPONENTS OF ASSESSED QUAL
31、ITY IN ACCORDANCE WITH: 3 Outline and dimensions:- (SeeTable 1) (First angle projection) 7 DIRECTLY HEATED NEGATIVE TEMPERATURE COEFFICIENT THERMISTORS 5 DISC TYPE 6 INSULATED/NON-INSULATED HUMIDITY PROOF/ NON-HUMIDITY PROOF Reference temperature: - C ASSESSMENT LEVEL “S” 8 Table 1 9 Style B-value -
32、/- a Range of rated resistance values Rated dissipation (W) Dissipation Factor Time Constant Dimensions (mm) Body Terminations R min R max L D l d a Values shall be chosen from the E-series of IEC 63. Where the use of intermediate values is essential, they shall be chosen from a series in that docum
33、ent. Information about manufacturers who have components qualified to this detail specification is available in the current CECC 00200: Qualified Products Listvi blankEN143003:1991 BSI 01-2000 1 1 Ratings and characteristics 1.1 Derating Thermistors covered by this specification are derated accordin
34、g to: (Derating curve to be included in the detail specification.) 2 Marking The marking 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
35、 documents National Authorized Institutions (ONH) will complete this section, making reference 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 con
36、tain the following information: Resistance value Tolerance B-value Style and national specification 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
37、.4 of CECC 43000. 6 Additional information (not for inspection purposes) The detail specification 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 Inspecti
38、on requirements (See Table 2) Drying clause is not applicable to thermistors manufactured in accordance with this detail specification. Standard selection tolerances - % Climatic category -/-/- Bump or Shock 4000 bumps at 390 m/s 2(1333 in each of 3 directions). 490 m/s 2 , 11 ms, half sine wave Vib
39、ration 10 Hz to 55 Hz or 10 Hz to 500 Hz; ; 0,75 mm or 98 m/s 2(whicheveris the less severe) Limit of resistance change after 1000 h endurance test - % B-value tolerance - % Resistance ratio (The ratio shall be specified if applicable). Resistance/temperature characteristic (The applicable temperatu
40、res and resistance tolerances shall be specified.) Proof voltage (insulated thermistors only) - V a.c. peak (Voltage to be applied in Sub-Groups B1, C2 and D1 for the voltage proof test.)EN143003:1991 2 BSI 01-2000 Table 2 (See Notes 1 and 2) Clause number and test Conditions of test IL AQL Performa
41、nce requirements Group A Inspection To be conducted on a sampling basis, lot-by-lot Sub-Group A1 (Non-destructive) II 1,0 % 4.3.1 Visual examination As in 4.3.1 4.3.2 Marking 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-des
42、tructive) II 1,0 % 4.4 Zero-power resistance Measurement temperature- C As in 4.4.3 Group B Inspection To be conducted on a sampling basis, lot-by-lot Sub-Group B1 (Non-destructive) S-3 1,0 % 4.7 Voltage proof (Insulated thermistors only) As in 4.7.4 Method 1 or Method 2 to be used Applied voltage:
43、- V a.c. peak Sub-Group B2 (Destructive) S-3 2,5 % 4.13.1 Soldering Solderability (Applicable only if Note 3 on page v states that the terminations are suitable for soldering) As in 4.13.1.1 The terminations shall be uniformly tinned. Sub-Group B3 (Non-destructive) II 1,5 % 4.8 Resistance/ temperatu
44、re 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 Notes on page 6EN143003:1991 BSI 01-2000 3Table 2 (See N
45、otes 1, 2 and 3) Clause number and test Conditions of test Sample size & criterion of acceptability Performance requirements P 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 S
46、ub-group B3 is performed. 4.5 B-value or resistance ratio T 1- C T 2- C The values shall be within the limits specified in the detail specification (See also 2.2.10 and 2.2.11 of CECC 43000) Sub-Group C2 (Destructive) 3 20 1 Half of the sample 4.12 Robustness of terminations Tensile, bending and tor
47、sion tests Visual examination As in 4.12.4 Zero-power resistance (Temperature - C) %R: k - % R 4.13.2 Soldering Resistance to soldering heat (The detail specification shall indicate whether Method 1A or Method 1B of test Tb of IEC68 2-20A shall apply). Visual examination As in 4.13.2.3 Zero-power re
48、sistance (Temperature: - C) %R: k - % R Other half of the sample 4.14 Rapid change of temperature T A : Lower category temperature T B : Upper category temperature Visual examination As in 4.14.3 Zero-power resistance (Temperature: - C) %R: k - % R 4.15 Vibration Procedure: B4 Frequency range: - Hz
49、to - Hz Amplitude: 0,75 mm or 98 m/s 2 (whichever is the less severe) Sweep endurance: Total duration: 6 h (SeeNote:4) Measurements during test Continuity There shall be no intermittency greater than0,5 ms Notes on page 6EN143003:1991 4 BSI 01-2000Table 2 (See Notes 1 and 3) Clause number and test Conditions of test Sample size & criterion of acceptability Performance requirements P n c Final measurements Visual examination As in 4.15.5 Zero-power resistan
