BS-CECC-40301-1988.pdf

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 resistors Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-2000 ISBN 0 580 35506 3 National foreword This British Standard has been prepared 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 Amendment No. 1 (1986). This standard is a harmonized specification within the CECC system. Details of national implementation of CECC standards is given in BS 9000-2:1983 “Specification for national implementation of CECC basic rules and rules of procedure”. Terminology and conventions. The text of the CECC 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 British 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 does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the CECC title page, pages ii to iv, pages 1 to 6 and a back 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. Cross-references International StandardCorresponding British Standard CECC 40000BS CECC 40000:1980 Harmonized system of quality assessment for electronic components. Generic specification: fixed resistors (Identical) CECC 40300BS CECC 40300:1981 Harmonized system of quality assessment for electronic components. Sectional specification: fixed precision resistors (Identical). Amendments issued since publication Amd. No.Date Comments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-2000i Contents Page National forewordInside front cover Forewordiii Text of CECC 403011 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 ii © BSI 03-2000 Contents Page Forewordiii 1Ratings and characteristics1 2Marking2 3Related documents2 4Ordering information2 5Certified test records2 6Inspection requirements2 Table 11 Table 23 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-2000iii 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 facilitate 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 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 CECC 00100: Basic 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 countries. Preface This blank detail specification was prepared by CECC Working Group 4: “RESISTORS”. It is one of a series of blank detail specifications for fixed precision resistors, all relating to the generic specification printed as CECC 40000 and the sectional specification printed as CECC 40300. The text of this specification has been prepared from the information contained in CECC 40000 and CECC 40300. 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 on 7 November 1973: DocumentVoting date CECC(Secretariat) 6010 January1972 CECC(Secretariat) 8330 June1972 CECC(Secretariat) 12710 May1973 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 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 specification 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 issue 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 interchangeability 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 the various resistor types. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-20001 Table 1 1 Ratings and characteristics Specification available from: 1 CECC 40301 2 34 ELECTRONIC COMPONENT OF ASSESSED QUALITY IN ACCORDANCE WITH: Outline and dimensions: (See Table 1) (First angle projection) 7 FIXED PRECISION RESISTORS 5 6 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 LDminnommax All dimensions are in millimetres. aResistance range 7 to 7 Standard selection tolerances± % Climatic category/ Vibration severity . Hz to . Hz; 0,75 mm or 98 m/s2 (whichever is the less severe) Low air pressure 8,5 kN/m2 (85 mbar) a The preferred values are those of the E-series of IEC 63. Where the 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 1 000 h endurance test± (% + 7) Temperature characteristic of resistance (20 to 70 °C)%R/R:k ± . %(%R/R%T:k . ppm/°C) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 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 of 2.4 of CECC 40000. 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 specification 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 with 3.5 of CECC 40000. 6 Inspection requirements (See Table 2) When drying is called for, Procedure I of 4.2 of CECC 40000 shall be used. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-20003 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 INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group A1NDS-4 1,0 % 4.3.1Visual examination As in 4.3.1 4.3.2MarkingAs in 4.3.2 Sub-Group A2NDS-4 1,0 % 4.3.3Dimensions (gauging) As specified in the detail specification. 4.4ResistanceSee CECC 40000 Appendix D 3.1As in 4.4.2 GROUP B INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group B1NDS-3 1,0 % 4.6Voltage proofInsulated resistors onlyAs in 4.6.3 Sub-Group B2DS-3 2,5 % 4.15.1Soldering Solderability (The detail specification shall indicate whether the terminations are suitable for printed wiring) As in 4.15.1 The terminations shall be uniformly tinned. 4.11Overload Test durationRated dissipation 1 s 5 s 15 s 0,063 W 0,125 to 0,75 W 1 to 2 W Voltage: The applied voltage shall be 2,5 times the rated voltage or twice the limiting element voltage, whichever is the less. Visual examination ResistanceAs in 4.11.3 %R/R:k.% Sub-Group B3NDS-3 2,5 % 4.7Temperature characteristic of resistance One cycle of 20 °C to 70 °C to 20 °C only. %R/R: k.% Notes on page 6. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 4 © BSI 03-2000 Table 2 Clause Number and Test (See Note 1) D or ND Conditions of test Sample size & criterion of acceptability (See Note 3) Performance requirements (See Note 1) Pnc GROUP C INSPECTION To be conducted on a sampling basis at the periodicity given in column “P” Sub-Group C1D3201 Half of the sample 4.14Robustness of terminations Tensile, bending and torsion tests. Visual examination Resistance As in 4.14.6.1 %R/R: k.% 4.15.2 Soldering Resistance to heat (The detail specification shall indicate whether Method 1A or Method 1B of Test Tb of IEC 68-2-20 shall apply). Visual examination Resistance As in 4.15.2.3 %R/R: k.% Other half of the sample 4.16Rapid change of temperature TA : Lower category temperature TB : Upper category temperature Visual examination Resistance 4.19VibrationProcedure : B4 Frequency range : . Hz to . Hz Amplitude: 0,75 mm or 98 m/s2 (whichever is the less severe). As in 4.16.4 %R/R: k.% Sweep endurance: Total duration: 6 h (See note 4) Visual examination Resistance As in 4.19.3 %R/R: k.% Notes on page 6. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 © BSI 03-20005 Table 2 Clause Number and Test (See Note 1) D or ND Conditions of test Sample size & criterion of acceptability (See Note 3) Performance requirements (See Note 1) Pnc All of the sample 4.20Climatic sequence Dry heat, Damp heat, cyclic, first cycle Cold Low air pressure 8,5 kN/m2 (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 C2D3201 4.24.1 Endurance at 70 °CDuration: 1000 h Examination at 48, 168, 500 and 1 000 h. Visual examination Resistance As in 4.24.1.7 %R/R: k.% Examination at 1 000 h Insulation resistance (insulated resistors only) R: U.M7 or G7 Sub-Group C3ND3201LCT/20 20/UCT 4.7Temperature characteristic or resistance %R/R: k . %. % Notes on page 6 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 40301:1988 6 © BSI 03-2000 Table 2 NOTE 1Clause numbers of tests and performance requirements refer to CECC 40000. NOTE 2Inspection Levels and AQLs are selected from IEC 410. NOTE 4Resistors shall be mounted by their normal means. Where this is by axial wire terminations, the distance between the resistor body and the mounting point on the termination shall be 6 ± 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. Clause 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) Pnc GROUP D INSPECTION To be conducted on a sampling basis at the periodicity given in column “P” Sub-Group D1D12201 4.21Damp heat, steady state Visual examination Resistance Insulation resistance (insulated resistors only) As in 4.21.4 %R/R: k.% R: U. M7 or G7 Sub-Group D2D36201 4.3.4Dimensions (detail)As specified in the detail specification 4.24.3Endurance at upper category temperature Duration: 1 000 h Examination at 168, 500 and 1 000 h. Visual examination Resistance Examination at 1 000 h Insulation resistance (insulated resistors only) As in 4.24.3.7 %R/R: k.% R: U.M7 or G7 Sub-Group D3D36201 4.24Endurance at other temperatures (where applicable) This sub-group is only applicable if a derating curve other than that shown in 2.4 of CECC 40300, is claimed in the detail specification. Duration: 1 000 h Examination at 48, 168, 500 and 1 000 h. Visual examination ResistanceAs in 4.24.1.7 %R/R: k.% (As for Sub-Group C2) Examination at 1000 h Insulation resistance (insulated resistors only) R: U.M7 or G7 NOTE 3In this table :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 temperature Licensed Copy: London South Bank Univer