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1、BRITISH STANDARD BS CECC 31100:1981 Incorporating Amendment No. 1 Harmonized system of quality assessment for electronic components: Sectional specification: Fixed ceramic dielectric capacitors of barrier layer type (dielectric class 3) UDC 621.319.4:621.315.612 Licensed Copy: London South Bank Univ
2、ersity, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 This British Standard, having been prepared under the direction of the Electronic Components Standards Committee, was published under the authority of the Executive Board and comes
3、 into effect on 31 August 1981 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ECL/4 Draft for comment 79/26974 DC ISBN 0 580 12254 9 Cooperating organizations The Electronic Components Standards Committee, under whose direction this British Standard
4、 was prepared, consists of representatives from the following: British Electrical and Allied Manufacturers Association (BEAMA) Electricity Supply Industry in England and Wales* Electronic Components Industry Federation* Electronic Engineering Association* Institution of Electronic and Radio Engineer
5、s National Supervising Inspectorate* Post Office* Society of British Aerospace Companies Limited* Telecommunication Engineering and Manufacturing Association (TEMA) The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Co
6、mmittee entrusted with the preparation of this British Standard: British Broadcasting Corporation Electrical Research Association Amendments issued since publication Amd. No.Date of issueComments 7402March 1993Indicated by a sideline in the margin Licensed Copy: London South Bank University, London
7、South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 BSI 11-1999i Contents Page Cooperating organizationsInside front cover National forewordii Forewordiii Text of CECC 311001 Publications referred toInside back cover Licensed Copy: London South Ba
8、nk University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Committee. It is identical with CENELEC E
9、lectronic Components Committee (CECC) 31100:1981 “Harmonized system of quality assessment for electronic components: Sectional specification: Fixed ceramic dielectric capacitors of barrier layer type (Dielectric Class 3)” including Amendment 1 (1988). This standard is a harmonized specification with
10、in the CECC system. 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 especially drawn to
11、 the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Cross-references. The British Standard harmonized with CECC 00100 is BS E9000 “General requirements for electronic components
12、 of assessed quality harmonized with the CENELEC Electronic Components Committee System” Part 1 “Basic rules”. 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 Britis
13、h Standard does not of itself confer immunity from legal obligations. International StandardCorresponding British Standard CECC 30000:1975BS E9070:1975 Harmonized system of quality assessment for electronic components. Generic specification for fixed capacitors (Identical) IEC 62:1974BS 1852:1975 Ma
14、rking codes for resistors and capacitors (Identical) IEC 63:1963BS 2488:1966 Schedule of preferred numbers for the resistance of resistors and the capacitance of capacitors for telecommunication equipment (Technically equivalent) IEC 68-1:1978BS 2011 Basic environmental testing procedures Part 1.1:1
15、980 General (Identical) IEC 68-2-20:1979BS 2011 Basic environmental testing procedures Part 2.1T:1981 Test Ta. Soldering (Identical) IEC 68-2-30:1980BS 2011 Basic environmental testing procedures Part 2.1Db:1981 Test Db and guidance. Damp heat, cyclic (12 + 12-hour cycle) (Identical) Summary of page
16、s 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 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amend
17、ment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled
18、Copy, (c) BSI BS CECC 31100:1981 ii BSI 11-1999 Contents Page Forewordiii Section 1. General 1.1Scope1 1.2Related documents1 1.3Terminology1 1.4Marking1 Section 2. Ratings and characteristics 2.1Preferred climatic categories2 2.2Rated voltage2 2.3Category voltage2 2.4Rated capacitance2 2.5Tolerance
19、on rated capacitance2 2.6Temperature characteristic of capacitance2 Section 3. Quality assessment procedure 3.1Primary stage of manufacture4 3.2Certified test records4 3.3Qualification approval4 3.4Quality conformance inspection4 3.5Delayed delivery5 Section 4. Test and measurement procedure 4.1Stan
20、dard atmospheric conditions8 4.2Visual inspection and check of dimensions8 4.3Capacitance8 4.4Tangent of loss angle8 4.5Insulation resistance8 4.6Voltage proof9 4.7Temperature characteristic of capacitance9 4.8Storage at low temperature10 4.9Tests of Groups 1a and C1a10 4.10 Tests of Groups 1b and C
21、1b10 4.11 Climatic sequence11 4.12 Test Ca: Damp heat, steady state12 4.13 Endurance13 Appendix A Capacitance ageing of fixed ceramic dielectric capacitors class 314 Table 1 Test schedule for qualification approval6 Table 2 Lot-by-lot tests7 Table 3 Periodic tests7 Licensed Copy: London South Bank U
22、niversity, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 BSI 11-1999iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (
23、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 the specifications and quality assessment procedures for electronic components, and by the grant of an internatio
24、nally recognized 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 System who wish
25、 to issue national harmonized specifications for FIXED CERAMIC DIELECTRIC CAPACITORS OF BARRIER LAYER TYPE (DIELECTRIC CLASS 3). It should be read in conjunction with document CECC 00100: Basic Rules (1974). Preface This sectional specification was prepared by CECC Working Group 3: “Capacitors” It i
26、s one of a series of sectional specifications all relating to the generic specification printed as CECC 30000. In accordance with the requirements of document CECC 00100 it is based, wherever possible, on the Recommendations of the International Electrotechnical Commission. As there are more than ni
27、ne sectional specifications related to CECC 30000: generic specification, Fixed Capacitors, the CECC Management Committee decided that these extra specifications should be numbered in the series 31100, 31200, 31300 etc. There is no generic specification numbered 31000. This specification is an examp
28、le of this extended numbering series. It is based on CECC 30000 and all clause etc, cross references are based on this generic specification. The text of this specification was circulated to the CECC for voting in the documents listed below and was ratified by the CECC Management Committee for print
29、ing as a CECC Specification: DocumentVoting DateReport on the Voting CECC (Secretariat) 826October 1979CECC (Secretariat) 890 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South
30、 Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 BSI 11-19991 Section 1. General 1.1 Scope This document relates to fixed ceramic dielectric capacitors of barrier layer type dielectric class 3 intended for use in electr
31、onic equipment. The capacitors are for operation in the low radio frequency range in power ratings not exceeding 10 var. Non-insulated, leadless and chip capacitors are excluded. 1.2 Related documents The following documents and any other documents to which they may relate are mandatory unless other
32、wise stated: 1.3 Terminology See 2.2 of CECC 30000 with the following additional definitions: 1.3.1 ceramic capacitors, dielectric class 3 a ceramic dielectric capacitor class 3 is a barrier layer capacitor and is suitable for by-pass and coupling applications, or for frequency discriminating circui
33、ts where low losses, high insulation resistance, and high stability of capacitance are not of major importance 1.3.2 sub-class the sub-class is defined by the maximum percentage change of capacitance within the category temperature range with respect to the capacitance at 20 C. The sub-class may be
34、expressed in code form (see table in 2.6) 1.3.3 rated temperature for capacitors covered by this specification the rated temperature is the upper category temperature 1.4 Marking The following marking information, in the order of importance given below, is required: 1) Rated capacitance and toleranc
35、e on rated capacitance in uncoded form or in code according to IEC 62. 2) Rated voltage 3) The sub-class: See table in 2.6 4) Manufacturers name or trade-mark 5) Year and month (or week) of manufacture in code form according to IEC 62 6) Climatic category 7) Manufacturers type designation 8) Referen
36、ce to the national or CECC number of the detail specification. NOTEWhen information given by an individual marking is included in that given by a second marking, the first marking may be omitted (for the marking of the component only). The capacitors shall be marked with rated capacitance and with a
37、s many as possible of the remaining items as is considered useful. The package containing the capacitors shall be clearly marked with all the information above. Any additional marking shall be applied so that no confusion can arise. CECC 30000(1975)Generic Specification: Fixed Capacitors Licensed Co
38、py: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 2 BSI 11-1999 Section 2. Ratings and characteristics 2.1 Preferred climatic categories The capacitors covered by this specification are classified into cl
39、imatic categories according to the general rules given in IEC 68-1. The severities for the cold, dry heat and damp heat (steady state) tests for the capacitors covered by this document shall be within the following ranges: Values selected within these ranges shall be chosen from those listed in IEC
40、68-2. The severities for the cold and dry heat tests are the lower and upper category temperature respectively. The preferred climatic categories are: 2.2 Rated voltage (UR) Preferred values of rated voltage are the values of the R5 series of ISO 3. If other values are needed they shall be chosen fr
41、om the R10 series. 2.3 Category voltage (UC) Since the rated temperature is defined as the upper category temperature, the category voltage is equal to the rated voltage. 2.4 Rated capacitance (CR) Rated capacitance values shall be taken from the E3 and E6 series of IEC 63. 2.5 Tolerance on rated ca
42、pacitance Standard values of rated capacitance tolerance are given in the table below: 2.6 Temperature characteristic of capacitance1) The following table denotes with a cross preferred values of temperature characteristic with and without d.c. voltage applied. The method of coding the class is also
43、 given e.g. a dielectric with a percentage change of 20 % without d.c. voltage applied over the temperature range from 55 to + 85 C will be defined as a class 3 C2 dielectric. Lower category temperature: 55 C to 10 C Upper category temperature:+ 70 C to + 85 C Damp heat, steady state4 to 56 days 55/
44、085/56 55/085/21 40/085/21 25/085/21 25/085/04 10/070/21 10/070/04 SeriesTolerances E3 20 + 80 % 20 + 50 % E6 20 % 1) The temperature range for which the temperature characteristic of the dielectric is defined is the same as the climatic temperature range. Licensed Copy: London South Bank University
45、, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 BSI 11-19993 Sub-class Max. capacitance change in % within the category temperature range with respect to the capacitance at 20 C without volts applied Category temperature range and num
46、ber code 55/+ 85 C 40/+ 85 C 25/+ 85 C 10/+ 70 C No voltage applied With rated d.c. voltage applied 2345 3 B 10+ 10/ 15 3 C 20+ 20/ 30 3 D+ 20/ 30+ 20/ 40 3 E+ 20/ 55+ 20/ 70 3 F+ 30/ 80+ 30/ 90 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00
47、2006, Uncontrolled Copy, (c) BSI BS CECC 31100:1981 4 BSI 11-1999 Section 3. Quality assessment procedure 3.1 Primary stage of manufacture The primary stage of manufacture is the metallizing of the dielectric to form the electrodes. 3.2 Certified test records When certified test records are prescrib
48、ed in the detail specification, the information required in 3.6 of CECC 30000, Generic Specification: Fixed Capacitors, shall be made available when requested by a purchaser. After the endurance test the parameters for which variables information is required are the capacitance change, tan $ and ins
49、ulation resistance. 3.3 Qualification approval 3.3.1 Sampling The sample shall be representative of the range of capacitors for which approval is sought. This may or may not be the complete range covered by the detail specification. The sample shall consist of specimens having the lowest and highest voltages, and for these voltages the lowest and highest capacitances values. When there are more than four rated voltages an intermediate voltage shall also be tested. Thus for the approval of a range, testing is required