1、BRITISH STANDARD BS CECC 42101:1978 Specification for Harmonized system of quality assessment for electronic components Blank detail specification Low voltage varistors primarily for telephony applications (Assessment level P)BS CECC42101:1978 BSI 04-2000 ISBN 0 580 35503 9 Amendments issued since p
2、ublication Amd. No. Date CommentsBS CECC42101:1978 BSI 04-2000 i Contents Page National foreword ii Foreword iii Text of CECC 42101 1BS CECC42101:1978 ii BSI 04-2000 National foreword This British Standard has been prepared under the direction of the Electronic Components Standard Committee. It is i
3、dentical with CENELEC Electronic Components Committee CECC42101 “Blank detail specification: Low voltage varistors primarily for telephony applications (assessment level P)”. This standard is a harmonized specification within the CECC system. Terminology and conventions. The text of the CECC specifi
4、cation has been approved as suitable for publication, without deviation, as a British Standard. 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
5、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 CECC00100 is BSE9000 “General requirements for electronic components of assessed quality harmonized with the CENELEC Electronic Component Committ
6、ee System” Part 1 “Basic rules”. The following International Standards are referred to in the text and for each there is a corresponding British Standard; these are as listed below: Scope. This standard lists the ratings, characteristics and inspection requirements which shall be included as mandato
7、ry requirements in accordance with BS CECC42100. Detail specification layout. In the event of conflict between the requirements of this specification and the provisions of BSE9000, the latter shall take precedence except the front page layout will be in accordance with BS9000 Circular LetterNo 15 da
8、ted August 1977. 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. International Standard C
9、orresponding British Standard CECC 42000:1978 BS CECC 42000:1978 Harmonized system of quality assessment for electronic components: Generic specification for varistors (Identical) CECC 42100:1978 BS CECC 42100:1978 Harmonized system of quality assessment for electronic components: Sectional specific
10、ation for low voltage varistors primarily for telephony application (Identical) 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 m
11、ay have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS CECC42101:1978 ii BSI 04-2000 Contents Page Foreword iii 1 Ratings and characteristics 1 1.1 De-rating 2 2 Marking 2 3 Related documents 2 4 Ordering information 2 5 Certified test records
12、 (RCE) 2 6 Inspection requirements 2 Table 1 1 Table 2 3BS CECC42101:1978 BSI 04-2000 iii 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 S
13、ystem 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
14、. 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 countries taking part in the System who wish to prepare and issue national harmonized detail specific
15、ations for LOW VOLTAGE VARISTORS PRIMARILY FOR TELEPHONY APPLICATIONS (ASSESSMENT LEVEL P). It should be read in conjunction with document CECC00100: Basic Rules (1974). At the date of printing of this document, the member countries of the CECC are Belgium, Denmark, France, Germany, Ireland, Italy,
16、the 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 speci
17、fications for low voltage resistors primarily for telephony applications, all relating to the sectional specification printed as CECC42100. In accordance with the requirements of document CECC00100, it is based, wherever possible, on the Recommendations of the International Electrotechnical Commissi
18、on. The text of this blank detail specification was circulated to the CECC for voting in document CECC(Secretariat)378 in November1975 and was ratified by the CECC for printing as a CECC Specification.BS CECC42101:1978 iv BSI 04-2000 The numbers between square brackets on page 1 correspond to the fo
19、llowing 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 Symbol and the number allotted by the CECC General Secretariat to the completed detail
20、specification. 3 The number and issue number of the national generic specification and sectional specification. 4 The national number of the detail specification, date of issue and any further information required by the national system together with any amendment numbers, if issued. Identification
21、of the varistor 5 A short description of the type of varistor 6 Information on typical construction (where applicable) for example: insulated disc. 7 Outline drawing with main dimensions which are of importance for interchangeability, and/or reference to the national or international documents for o
22、utlines. 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 Reference data on the most important properties, to allow comparison be
23、tween the various resistor types intended for the same, or for similar, applications.BS CECC42101:1978 BSI 04-2000 1 Table 1 1 Ratings and characteristics Specification available from: 1 CECC 42101-XXX 2 Page: of: 4 ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: 3 Outline and dimensio
24、ns: (First angle projection) (SeeTable 1) 7 LOW VOLTAGE VARISTORS PRIMARILY FOR TELEPHONY APPLICATION 5 DISC TYPE, PROTECTED, WITH/WITHOUT UNIDIRECTIONAL/AXIAL WIRE TERMINATIONS a 6 Terminal connections: ASSESSMENT LEVEL P 8 For ordering information, see4. 9 NOTEOther shapes are permitted within the
25、 dimensional envelope shown a Delete as appropriate Style Max current at reference voltage (mA) Peak current for voltage under pulse conditions (mA) Dimensions D W d 1 A All dimensions are in millimetres. See 2.5.6 of CECC 42100. Climatic category -/-/- Reference voltage - V Rated dissipation - W Te
26、mperature coefficient of - (measured at . ) -%/ C Non-linearity - V max See the relevant Qualified Products List for the availability of components made to this specification.BS CECC42101:1978 2 BSI 04-2000 1.1 De-rating Varistors covered by this specification are derated according to the curve: 2 M
27、arking The marking of the component and the package shall be in accordance with the requirements of 2.4 of CECC42000. 3 Related documents (National Authorized Institutions will complete this section, making reference to any documents, recommendations or specifications directly referred to in their n
28、ational equivalent of this document.) 4 Ordering information Orders for varistors covered by this specification shall contain the following information: reference voltage maximum current at reference voltage number of the detail specification and style reference 5 Certified test records (RCE) Where
29、certified test records are called for, they shall be prepared in accordance with 3.5 of CECC42000. 6 Inspection requirements (SeeTable 2) When it is desired to obtain qualification approval by adopting the fixed sample size procedure, (See 3.3.3 of CECC42000) use shall be made of the test schedule g
30、iven for that purpose in CECC42100. The conditions of test and the performance requirements shall be identical to those prescribed for quality conformance inspection in the detail specification.BS CECC42101:1978 BSI 04-2000 3 Table 2 Test D or ND Conditions of Test IL AQL Performance Requirements (S
31、ee Note 1) (See Note 2) (See Note 1) GROUP A INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group A1 ND II 4% 4.2.1 Visual examination As in 4.2.1 Sub-Group A2 ND II 1% 4.2.2 Marking As in 4.2.2 4.2.3 Dimensions (gauging) As specified in Table 1. Sub-Group A3 ND II 1,5% C1.2 Voltage
32、under pulse conditions for peak current see Table 1. V max : - V 4.3 Current at reference voltage Reference voltage: - V I: k - mA GROUP B INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group B1 D S-3 2,5% 4.11 Robustness of terminations Tensile and bending tests Visual examination A
33、s in 4.11.6 Current at reference voltage % I: k - Reference voltage - V 4.10.1 Soldering solderability Solder bath method: 230 10 C The terminations shall be uniformly tinned. Sub-Group B3 D S-2 1,5% C1.1 Overload Visual examination As in C1.1.4 Current at reference voltage % I: k - Reference voltag
34、e - V Voltage under pulse conditions V max : - V Notes on page 6BS CECC42101:1978 4 BSI 04-2000 Table 2 Test (See Note 1) Dor ND Conditions of Test Sample size & criterion of acceptability (See Note 3) Performance Requirements (See Note 1) P n c GROUP C INSPECTION To be conducted on a sampling basis
35、 at the periodicity given in column “p” Sub-Group C1 D 6 8 1 C1.3 Pulse endurance Visual examination As in C1.3.4 Current at reference voltage % I: k - Reference voltage - V Voltage under pulse conditions V max : - V Insulation resistance (Insulated varistors only) R: U . 7 Sub-Group C2 D 6 13 1 4.1
36、0.2 Soldering Resistance to solder heat Method 1A of IEC 68-2-20A Visual examination As in 4.10.2.4 Current at reference voltage % I: k - Reference voltage - V 4.12 Rapid change of temperature T A : LCT (see Note 1) T B : UCT (see Note 1) Visual examination As in 4.12.4 Current at reference voltage
37、% I: k - Reference voltage - V GROUP D INSPECTION To be conducted on a sampling basis at the periodicity given in column “p” Sub-Group D1 D 12 8 1 4.16 Climatic sequence (Low air pressure test not applicable) Dry heat Damp heat, cyclic, first cycle Reference voltage: - V Cold Notes on page 6BS CECC4
38、2101:1978 BSI 04-2000 5 Table 2 Test (See Note 1) D or ND Conditions of Test Sample size & criterion of acceptability (See Note 3) Performance Requirements (See Note 1) P n c 4.16 Climatic sequence (continued) Damp heat, cyclic, remaining cycles Reference voltage: - V Final measurements Visual exami
39、nation As in 4.16.9.1 Current at reference voltage % I: k - Reference voltage - V Sub-Group D2 D 24 8 1 4.17 Damp heat, steady state 4 specimens No applied voltage Other 4 specimens Applied voltage of V = Visual examination As in 4.17.3.1 Current at reference voltage % I: k - Reference voltage - V I
40、nsulation resistance (Insulated varistors only) R U . 7 Sub-Group D3 ND 24 8 1 4.5 Temperature coefficient of - Measured at - 25 / LCT 25 / UCT %/ C % % Sub-Group D4 D 24 6 1 4.14 Shock Pulse shape: half sine Acceleration: 490 m/s 2 Pulse duration: 11 ms (See Note 4) Visual examination As in 4.14.3
41、Current at reference voltage % I: k - Reference voltage - V Sub-Group D5 D 24 5 0 4.18 Flammability (In accordance with the conditions and requirements of the national method) Notes on page 6BS CECC42101:1978 6 BSI 04-2000 NOTE 1Reference numbers of tests and performance requirements refer to CECC42
42、000. LCT = Lower category temperature UCT = Upper category temperature NOTE 2Inspection levels and AQLs are selected from IEC410. NOTE 4The varistors shall be mounted by their normal means in such a manner that there shall be no parasitic vibration. NOTE 3In this table: D = Destructive ND = Non-dest
43、ructive p = periodicity (in months) n = sample size c = acceptance criterion (number of permitted defectives)blankBS CECC 42101:1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents th
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