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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) Licensed Copy: London South Bank University, London South Bank University
2、, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 BSI 04-2000 ISBN 0 580 35503 9 Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy
3、, (c) BSI BS CECC 42101:1978 BSI 04-2000i Contents Page National forewordii Forewordiii Text of CECC 421011 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 ii BSI 04-2000 National foreword Th
4、is British Standard has been prepared under the direction of the Electronic Components Standard Committee. It is identical with CENELEC Electronic Components Committee CECC 42101 “Blank detail specification: Low voltage varistors primarily for telephony applications (assessment level P)”. This stand
5、ard is a harmonized specification within the CECC system. Terminology and conventions. The text of the CECC specification 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 Sta
6、ndards; attention is especially drawn to 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 “Genera
7、l requirements for electronic components of assessed quality harmonized with the CENELEC Electronic Component Committee 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: S
8、cope. This standard lists the ratings, characteristics and inspection requirements which shall be included as mandatory requirements in accordance with BS CECC 42100. Detail specification layout. In the event of conflict between the requirements of this specification and the provisions of BS E9000,
9、the latter shall take precedence except the front page layout will be in accordance with BS 9000 Circular Letter No 15 dated 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 applicatio
10、n. Compliance with a British Standard does not of itself confer immunity from legal obligations. International StandardCorresponding British Standard CECC 42000:1978BS CECC 42000:1978 Harmonized system of quality assessment for electronic components: Generic specification for varistors (Identical) C
11、ECC 42100:1978BS CECC 42100:1978 Harmonized system of quality assessment for electronic components: Sectional specification 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 CEC
12、C 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. Licensed Copy: London South Bank University, London South Bank Universit
13、y, 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 Copy, (c) BSI BS CECC 42101:1978 ii BSI 04-2000 Contents Page Forewordiii 1Ratings and characteristics1 1.1De-
14、rating2 2Marking2 3Related documents2 4Ordering information2 5Certified test records (RCE)2 6Inspection requirements2 Table 11 Table 23 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 BSI 04-
15、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 t
16、o 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 coun
17、tries 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 specifications for LOW VOLTAGE VARISTORS PRIMARILY FOR TELEPHONY APPLICATIONS (ASSESSMENT
18、LEVEL P). 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, France, Germany, Ireland, Italy, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom, and copies o
19、f 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 low voltage resistors primarily for telephony applications, all rel
20、ating to the sectional specification printed as CECC 42100. In accordance with the requirements of document CECC 00100, it is based, wherever possible, on the Recommendations of the International Electrotechnical Commission. The text of this blank detail specification was circulated to the CECC for
21、voting in document CECC(Secretariat)378 in November 1975 and was ratified by the CECC for printing as a CECC Specification. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 iv BSI 04-2000 The
22、numbers between square brackets on page 1 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 Symbol and the number all
23、otted by the CECC General Secretariat to the completed detail 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 t
24、ogether with any amendment numbers, if issued. Identification 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
25、/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 Reference
26、 data on the most important properties, to allow comparison between the various resistor types intended for the same, or for similar, applications. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:
27、1978 BSI 04-20001 Table 1 1 Ratings and characteristics Specification available from: 1CECC 42101-XXX2 Page: of: 4 ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: 3 Outline and dimensions: (First angle projection) (See Table 1)7LOW VOLTAGE VARISTORS PRIMARILY FOR TELEPHONY APPLICATION
28、5 DISC TYPE, PROTECTED, WITH/WITHOUT UNIDIRECTIONAL/AXIAL WIRE TERMINATIONSa 6 Terminal connections:ASSESSMENT LEVEL P8 For ordering information, see 4.9 NOTEOther shapes are permitted within the dimensional envelope shown a Delete as appropriate Style Max current at reference voltage (mA) Peak curr
29、ent for voltage under pulse conditions (mA) Dimensions DWd1A All dimensions are in millimetres. See 2.5.6 of CECC 42100. Climatic category-/-/- Reference voltage- V Rated dissipation- W Temperature coefficient of - (measured at . ) - %/C Non-linearity- Vmax See the relevant Qualified Products List f
30、or the availability of components made to this specification. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 2 BSI 04-2000 1.1 De-rating Varistors covered by this specification are derated a
31、ccording to the curve: 2 Marking The marking of the component and the package shall be in accordance with the requirements of 2.4 of CECC 42000. 3 Related documents (National Authorized Institutions will complete this section, making reference to any documents, recommendations or specifications dire
32、ctly referred to in their national 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 Certifie
33、d test records (RCE) Where certified test records are called for, they shall be prepared in accordance with 3.5 of CECC 42000. 6 Inspection requirements (See Table 2) When it is desired to obtain qualification approval by adopting the fixed sample size procedure, (See 3.3.3 of CECC 42000) use shall
34、be made of the test schedule given for that purpose in CECC 42100. The conditions of test and the performance requirements shall be identical to those prescribed for quality conformance inspection in the detail specification. Licensed Copy: London South Bank University, London South Bank University,
35、 Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 BSI 04-20003 Table 2 Test D or ND Conditions of Test ILAQL Performance Requirements (See Note 1)(See Note 2)(See Note 1) GROUP A INSPECTION To be conducted on a sampling basis, lot-by-lot Sub-Group A1NDII4 % 4.2.1Visu
36、al examinationAs in 4.2.1 Sub-Group A2NDII1 % 4.2.2MarkingAs in 4.2.2 4.2.3Dimensions (gauging) As specified in Table 1. Sub-Group A3NDII1,5 % C1.2Voltage under pulse conditions for peak current see Table 1. Vmax: - V 4.3Current at reference voltage Reference voltage: - VI: k - mA GROUP B INSPECTION
37、 To be conducted on a sampling basis, lot-by-lot Sub-Group B1DS-32,5 % 4.11Robustness of terminations Tensile and bending tests Visual examinationAs in 4.11.6 Current at reference voltage % I: k - Reference voltage - V 4.10.1 Soldering solderabilitySolder bath method: 230 10 C The terminations shall
38、 be uniformly tinned. Sub-Group B3DS-21,5 % C1.1OverloadVisual examinationAs in C1.1.4 Current at reference voltage % I: k - Reference voltage - V Voltage under pulse conditions Vmax: - V Notes on page 6 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 G
39、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 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) Pnc GROUP C INSPECTION To be conducted on a sampling basis at the periodicity giv
40、en in column “p” Sub-Group C1D681 C1.3Pulse enduranceVisual examinationAs in C1.3.4 Current at reference voltage % I: k - Reference voltage - V Voltage under pulse conditions Vmax: - V Insulation resistance (Insulated varistors only) R: U . 7 Sub-Group C2D6131 4.10.2Soldering Resistance to solder he
41、at Method 1A of IEC 68-2-20A Visual examinationAs in 4.10.2.4 Current at reference voltage % I: k - Reference voltage - V 4.12Rapid change of temperature TA: LCT (see Note 1) TB: UCT (see Note 1) Visual examinationAs in 4.12.4 Current at reference voltage % I: k - Reference voltage - V GROUP D INSPE
42、CTION To be conducted on a sampling basis at the periodicity given in column “p” Sub-Group D1D1281 4.16Climatic sequence(Low air pressure test not applicable) Dry heat Damp heat, cyclic, first cycle Reference voltage: - V Cold Notes on page 6 Licensed Copy: London South Bank University, London South
43、 Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 BSI 04-20005 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) Pnc 4.16Climatic sequence (continued) Damp
44、 heat, cyclic, remaining cycles Reference voltage: - V Final measurements Visual examinationAs in 4.16.9.1 Current at reference voltage% I: k - Reference voltage - V Sub-Group D2D2481 4.17Damp heat, steady state 4 specimens No applied voltage Other 4 specimens Applied voltage of V = Visual examinati
45、onAs in 4.17.3.1 Current at reference voltage% I: k - Reference voltage - V Insulation resistance (Insulated varistors only) R U . 7 Sub-Group D3ND2481 4.5Temperature coefficient of - Measured at - 25/LCT25/UCT %/C % Sub-Group D4D2461 4.14ShockPulse shape: half sine Acceleration: 490 m/s2 Pulse dura
46、tion: 11 ms (See Note 4) Visual examinationAs in 4.14.3 Current at reference voltage% I: k - Reference voltage - V Sub-Group D5D2450 4.18Flammability(In accordance with the conditions and requirements of the national method) Notes on page 6 Licensed Copy: London South Bank University, London South B
47、ank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 6 BSI 04-2000 NOTE 1Reference numbers of tests and performance requirements refer to CECC 42000. LCT = Lower category temperature UCT = Upper category temperature NOTE 2Inspection levels and AQLs are se
48、lected from IEC 410. 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-destructive p= periodicity (in months) n= sample size c= acceptance criterion (number of permitted defectives) Licen
49、sed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:02:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42101:1978 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Sta