1、BRITISH STANDARD BS CECC 40301:1988 (Including Amendment No. 1) Specification for Harmonized system of quality assessment for electronic components Blank detail specification Fixed precision resistorsBS CECC40301:1988 BSI 03-2000 ISBN 0 580 35506 3 National foreword This British Standard has been pr
2、epared under the direction of the Electronic Components Standards Committee. It is identical with CENELEC Electronics Components Committee (CECC) 40301:1975: “Harmonized system of quality assessment for electronic components. Blank detail specification: fixed precision resistors” as amended by Amend
3、ment No. 1 (1986). This standard is a harmonized specification within the CECC system. Details of national implementation of CECC standards is given in BS9000-2:1983 “Specification for national implementation of CECC basic rules and rules of procedure”. Terminology and conventions. The text of the C
4、ECC specification has been approved as 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 drawn especially to the following. The comma has been used as a decimal marker. In Br
5、itish Standards it is current practice to use a full point on the baseline as the decimal marker. 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 do
6、es not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the CECC title page, pages ii to iv, pages1to6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incor
7、porated. This will be indicated in the amendment table on the inside front cover. Cross-references International Standard Corresponding British Standard CECC 40000 BS CECC 40000:1980 Harmonized system of quality assessment for electronic components. Generic specification: fixed resistors (Identical)
8、 CECC 40300 BS CECC 40300:1981 Harmonized system of quality assessment for electronic components. Sectional specification: fixed precision resistors (Identical). Amendments issued since publication Amd. No. Date CommentsBS CECC40301:1988 BSI 03-2000 i Contents Page National foreword Inside front cov
9、er Foreword iii Text of CECC 40301 1ii blankBS CECC40301:1988 ii BSI 03-2000 Contents Page Foreword iii 1 Ratings and characteristics 1 2 Marking 2 3 Related documents 2 4 Ordering information 2 5 Certified test records 2 6 Inspection requirements 2 Table 1 1 Table 2 3BS CECC40301:1988 BSI 03-2000 i
10、ii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the 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 fac
11、ilitate international trade by the harmonization of specifications and quality assessment procedures for electronic components, and by the grant of an internationally recognized Mark, or Certificate, of Conformity. The components produced under the System are thereby accepted by all member countries
12、 without further testing. This document has been formally approved by the CECC and has been prepared for those member countries taking part in the System who wish to prepare and issue detail specifications for FIXED PRECISION RESISTORS. It should be read in conjunction with document CECC00100: Basic
13、 Rules (1974). At the date of printing of this document the member countries of the CECC are Belgium, Denmark, Germany, France, Ireland, Italy, Netherlands, Norway, Sweden, Switzerland and the United Kingdom, and copies of it can be obtained from the National Committees of the CENELEC in these count
14、ries. Preface This blank detail specification was prepared by CECC Working Group4: “RESISTORS”. It is one of a series of blank detail specifications for fixed precision resistors, all relating to the generic specification printed as CECC40000 and the sectional specification printed as CECC40300. The
15、 text of this specification has been prepared from the information contained in CECC40000 and CECC40300. It was circulated to the CECC for voting in the documents listed below and was formally approved by the CECC for publication as a CECC Specification on7 November1973: Document Voting date CECC(Se
16、cretariat) 60 10 January 1972 CECC(Secretariat) 83 30 June 1972 CECC(Secretariat) 127 10 May 1973BS CECC 40301:1988 iv BSI 03-2000 The numbers between square brackets on the first page correspond to the following indications which should be given: Identification of the harmonized detail specificatio
17、n 1 The name of National Standards Organization under whose authority the detail specification is drafted. 2 The CECC number of the relevant blank detail specification. 3 The number and issue number of the national generic specification. 4 The national number of the detail specification, date of iss
18、ue and any further information required by the national system. Identification of the resistor 5 A short description of the type of resistor. 6l Information on typical construction (where applicable) e.g. wirewound insulated. 7 Outline drawing with main dimensions which are of importance for interch
19、angeability 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. 9 Reference data on the most important properties, to allow comparison between th
20、e various resistor types.BS CECC40301:1988 BSI 03-2000 1 Table 1 1 Ratings and characteristics Specification available from: 1 CECC 40301 2 3 4 ELECTRONIC COMPONENT OF ASSESSED QUALITY IN ACCORDANCE WITH: Outline and dimensions: (See Table 1) (First angle projection) 7 FIXED PRECISION RESISTORS 5 6
21、8 NOTE 1Other shapes are permitted within the dimensions given. NOTE 2These resistors are (not) suitable for printed wiring applications. 9 Style Rated dissipation (W at 70 C) Limiting element voltage (V d.c. or a.c. peak) Isolation voltage (V d.c. or a.c. peak Maximum dimensions d L D min nom max A
22、ll dimensions are in millimetres. a Resistance range 7 to 7 Standard selection tolerances % Climatic category / Vibration severity . Hz to . Hz; 0,75 mm or 98 m/s 2(whichever is the less severe) Low air pressure 8,5 kN/m 2(85 mbar) a The preferred values are those of the E-series of IEC63. Where the
23、 use of intermediate values is essential, they should, wherever possible, be chosen from a series in that document. See the relevant Qualified Parts List for the availability of components qualified to this detail specification. Limit of resistance change after 1000 h endurance test (% + 7) Temperat
24、ure characteristic of resistance (20 to 70 C) %R/R:k . % (%R/R%T:k . ppm/ C)BS CECC40301:1988 2 BSI 03-2000 1.1 Derating Resistors covered by this specification are derated according to the curve: 2 Marking The marking of the component and package shall be in accordance with the requirements of2.4 o
25、f CECC40000. 3 Related documents National Authorized Institutions 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 resistors covered by this specifica
26、tion shall contain the following information: Resistance value Tolerance Style and national specification number of this detail specification. 5 Certified test records National Authorized Institutions shall indicate in this clause whether certified test records shall be prepared in accordance with3.
27、5 of CECC40000. 6 Inspection requirements (See Table 2) When drying is called for, Procedure I of 4.2 of CECC40000 shall be used.BS CECC40301:1988 BSI 03-2000 3 Table 2 Clause Number and Test (See Note 1) D or ND Conditions of test I L A Q L Performance requirements (See Note 1) (See Note 2) GROUP A
28、 INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group A1 ND S-4 1,0% 4.3.1 Visual examination As in 4.3.1 4.3.2 Marking As in 4.3.2 Sub-Group A2 ND S-4 1,0% 4.3.3 Dimensions (gauging) As specified in the detail specification. 4.4 Resistance See CECC 40000 Appendix D 3.1 As in 4.4.2 G
29、ROUP B INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group B1 ND S-3 1,0% 4.6 Voltage proof Insulated resistors only As in 4.6.3 Sub-Group B2 D S-3 2,5% 4.15.1 Soldering Solderability (The detail specification shall indicate whether the terminations are suitable for printed wiring)
30、As in 4.15.1 The terminations shall be uniformly tinned. 4.11 Overload Test duration Rated dissipation 1s 5s 15s 0,063 W 0,125 to 0,75W 1 to 2W Voltage: The applied voltage shall be 2,5 times the rated voltage or twice the limiting element voltage, whichever is the less. Visual examination Resistanc
31、e As in 4.11.3 %R/R:k.% Sub-Group B3 ND S-3 2,5% 4.7 Temperature characteristic of resistance One cycle of 20 C to 70 C to 20 C only. %R/R: k.% Notes on page 6.BS CECC40301:1988 4 BSI 03-2000 Table 2 Clause Number and Test (See Note 1) D or ND Conditions of test Sample size & criterion of acceptabil
32、ity (SeeNote 3) Performance requirements (See Note 1) P n c GROUP C INSPECTION To be conducted on a sampling basis at the periodicity given in column “P” Sub-Group C1 D 3 20 1 Half of the sample 4.14 Robustness of terminations Tensile, bending and torsion tests. Visual examination Resistance As in 4
33、.14.6.1 %R/R: k.% 4.15.2 Soldering Resistance to heat (The detail specification shall indicate whether Method 1A or Method1B of Test Tb of IEC68-2-20 shall apply). Visual examination Resistance As in 4.15.2.3 %R/R: k.% Other half of the sample 4.16 Rapid change of temperature T A :Lower category tem
34、perature T B: Upper category temperature Visual examination Resistance 4.19 Vibration Procedure : B4 Frequency range : . Hz to . Hz Amplitude: 0,75mm or 98m/s 2(whichever is the less severe). As in 4.16.4 %R/R: k.% Sweep endurance: Total duration: 6h (See note 4) Visual examination Resistance As in
35、4.19.3 %R/R: k.% Notes on page 6.BS CECC40301:1988 BSI 03-2000 5 Table 2 Clause Number and Test (See Note 1) D or ND Conditions of test Sample size & criterion of acceptability (SeeNote 3) Performance requirements (SeeNote 1) P n c All of the sample 4.20 Climatic sequence Dry heat, Damp heat, cyclic
36、, first cycle Cold Low air pressure 8,5 kN/m 2(85 mbar) Damp heat, cyclic, remaining cycles Final measurements Visual examination Resistance As in 4.20.8 %R/R: k.% Insulation resistance (insulated resistors only) R: U.M7 or G7 Sub-Group C2 D 3 20 1 4.24.1 Endurance at70 C Duration: 1000h Examination
37、 at 48, 168, 500 and 1000h. Visual examination Resistance As in 4.24.1.7 %R/R: k.% Examination at 1000h Insulation resistance (insulated resistors only) R: U.M7 or G7 Sub-Group C3 ND 3 20 1 LCT/20 20/UCT 4.7 Temperature characteristic or resistance %R/R: k .% .% Notes on page 6BS CECC40301:1988 6 BS
38、I 03-2000 Table 2 NOTE 1Clause numbers of tests and performance requirements refer to CECC40000. NOTE 2Inspection Levels and AQLs are selected from IEC410. NOTE 4Resistors shall be mounted by their normal means. Where this is by axial wire terminations, the distance between the resistor body and the
39、 mounting point on the termination shall be6 1 mm. The design of a resistor may be such that special mounting fixtures are required in its use. In this case, the detail specification shall describe the mounting fixtures and they shall be used in the performance of bump, shock and vibration tests. Cl
40、ause Number and Test (See Note 1) D or ND Conditions of test Sample size & criterion of acceptability (See Note 1) Performance requirements (See Note 1) P n c GROUP D INSPECTION To be conducted on a sampling basis at the periodicity given in column “P” Sub-Group D1 D 12 20 1 4.21 Damp heat, steady s
41、tate Visual examination Resistance Insulation resistance (insulated resistors only) As in 4.21.4 %R/R: k.% R: U. M7 or G7 Sub-Group D2 D 36 20 1 4.3.4 Dimensions (detail) As specified in the detail specification 4.24.3 Endurance at upper category temperature Duration: 1000 h Examination at 168, 500
42、and1000h. Visual examination Resistance Examination at 1000h Insulation resistance (insulated resistors only) As in 4.24.3.7 %R/R: k.% R: U.M7 or G7 Sub-Group D3 D 36 20 1 4.24 Endurance at other temperatures (where applicable) This sub-group is only applicable if a derating curve other than that sh
43、own in 2.4 of CECC40300, is claimed in the detail specification. Duration: 1000 h Examination at 48, 168, 500 and 1000h. Visual examination Resistance As in 4.24.1.7 %R/R: k.% (As for Sub-GroupC2) Examination at 1000 h Insulation resistance (insulated resistors only) R: U.M7 or G7 NOTE 3In this tabl
44、e : p = periodicity (in months) n = sample size c = acceptance criterion (permitted number of defectives) D = destructive ND = non-destructive LCT = Lower category temperature UCT = Upper category temperatureblankBS CECC 40301:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitut
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