1、BRITISH STANDARD BS EN 140202:1997 Harmonized system of quality assessment for electronic components Blankdetail specification: Fixed power resistors (Assessment level M) The European Standard EN140202:1996 has the status of a British Standard ICS31.040.10BSEN140202:1997 This British Standard, havin
2、g been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15September1997 BSI 09-1999 ISBN 0 580 27787 9 National foreword This British Standard is the English language version of EN140202:1996 published b
3、y the European Electronic Components Committee (CECC) of the European Committee for Electrotechnical Standardization (CENELEC). Itsupersedes BS CECC40202:1981 which will be withdrawn on1998-02-15. The UK participation in its preparation was entrusted by Technical Committee EPL/40, Capacitors and res
4、istors for electronic equipment, to Subcommittee EPL/40/2, Resistors, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; m
5、onitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which l
6、ists normative references to international publications with their corresponding European publications. TheBritishStandards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Inde
7、x”, or using the “Find” facility of the BSI Standards Electronic Catalogue. 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 confe
8、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to10 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the
9、amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN140202:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 140202 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN140202 November1996 Supersed
10、es CECC40202:1981 Descriptors: Electronic components, fixed power resistors, blank detail specification, assurance level M English version Blank Detail Specification: Fixedpowerresistors(Assessment level M) Spcification particulire cadre: Rsistances fixes forte dissipation (Niveaudassurance de quali
11、t M) Vordruck fr Bauartspezifikation: Hochbelastbare Festwiderstnde (Bewertungsstufe M) This European Standard was approved by CENELEC on1996-03-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the stat
12、us of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German).
13、 A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Fin
14、land, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische No
15、rmung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref.No.EN140202:1996EEN140202:1996 BSI 09-1999 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC/CECC SC40XB, Resistors (formerCECC/WG4A) The text of the draft
16、 based on document CECC(Secretariat)3560 was submitted to the formal vote; together with the voting report, circulated as document CECC(Secretariat)3681, itwas approved as EN140202 on1996-03-14. This European Standard supersedes CECC40202:1981. The following dates were fixed: Contents Page Foreword
17、2 1 Ratings and characteristics 5 2 Marking 5 3 Related documents 5 4 Ordering information 5 5 Certified test records 6 6 Additional information 6 7 Inspection requirements 6 8 Assessed process average procedures 6 Table 1 Dimensions 4 Table 2 Inspection requirements 6 latest date by which the EN ha
18、s to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-02-15 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-02-15EN140202:1996 BSI 09-1999 3 Key for page4 The numbers between square brac
19、kets on the first page correspond to the following indications which should be given: Identification of the harmonised detail specification 1 The name of the National Standards Organisation under whose authority the detail specification is drafted. 2 The CECC symbol and the number allotted to the na
20、tional detail specification by the CECC General Secretariat. 3 The number and issue number of the national generic and sectional 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
21、 5 A short description of the type of resistor. 6 Information on typical construction (where applicable) e.g.wire wound vitreous enamel protection. 7 Outline drawing with main dimensions which are of importance for interchangeability and/or reference to the national or international documents for ou
22、tlines. Alternatively, this drawing may be given in an annex 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 betwee
23、n the various resistor types.EN140202:1996 4 BSI 09-1999 Specification available from: 1 CECC40202-XXX 2 4 ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: 3 Outline and dimensions: (seeTable1) (First angle protection) 7 FIXED POWER RESISTORS 5 6 ASSESSMENT LEVEL “M” 8 NOTE 1Other shape
24、s are permitted within the dimensions given. NOTE 2These resistors are (not) suitable for printed wiring applications. Table 1 Dimensions 9 Style Rated dissipation (W at70 C) Limiting element voltage (Vd.c.or a.c.rms.) Isolation voltage (Vd.c.or a.c.peak) Maximum dimensions d L D min. nom. max. All
25、dimensions are in millimetres. Seethe relevant Register of Approvals for the availability of components qualified to this detail specification.EN140202:1996 BSI 09-1999 5 1 Ratings and characteristics 1.1 Derating Resistors covered by this specification are derated according to the curve: NOTEVariou
26、s parameters have been precisely specified for this component. It should not be assumed that any parameter not specified will remain unchanged from one component to another. Should for any reason it be necessary for further parameter(s) to be controlled, then a new more detailed specification should
27、 be used. The additional test method(s) shall be fully described, and appropriate limits, AQLs and Inspection Levels specified. 2 Marking The marking of the component and package shall be in accordance with the requirements of2.4 of EN140000. 3 Related documents National Authorised Institutions will
28、 complete this section, making reference to any documents, recommendations and 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. Toler
29、ance. Style and national specification number of this detail specification. Resistance range 1) .7 to.7 Standard selection tolerances .% Climatic category . /. /. 1) The preferred values are those of the E series ofIEC63. Where the use of intermediate values is essential, they should, wherever possi
30、ble, be chosen from a series in that document. Vibration severity .Hz to.Hz;0,75mm or98m/s 2(whichever is the less severe) Low air pressure 8,5kPa(85mbar) Bump (or shock) severity . . Limit of resistance change after1000h endurance test (.%R + .7) Temperature characteristic of resistance (20 C to70
31、C) %R:k .%R (%R/R%T:k .10 6 / C)EN140202:1996 6 BSI 09-1999 5 Certified test records The detailed specification shall indicate in this clause whether certified test records shall be prepared in accordance with3.9 of EN140000. 6 Additional information (not for inspection purposes) The detail specific
32、ation may include information (which is not required to be verified by the inspection procedure), such as circuit diagrams, curves, drawings and notes needed for the clarification of the detail specification. 7 Inspection requirements (seeTable 2) 7.1 When drying is called for, ProcedureI of4.3 of E
33、N140000 shall be used. 7.2 When the manufacturer desires to obtain qualification approval by adopting the fixed sample size procedure (see3.5.3 of EN140000) use shall be made of the test schedule in Table A.1/A.2 of the annex to EN140200. The conditions of the test and the performance requirements s
34、hall be identical to those prescribed for quality conformance inspection in the detail specification. 8 Assessed process average procedures 8.1 When the Assessed Process Average Procedure as specified in CECC00014 is used, the detailed specification shall give the limits that are required in clause3
35、.12 of EN140000. The detailed specification shall prescribe at relevant places that non-operatives have to be recorded. Table 2 Inspection requirements See notes on page10 Clause number and test Conditions of test IL AQL Performance requirements Group A inspection To be conducted on a sampling basis
36、, lot-by-lot Sub-group A1 Non-destructive S-3 1,5% 4.4.1 4.4.1 Visual examination Marking As in4.4.1 As in4.4.1 Sub-group A2 Non-destructive S-3 1,5% 4.5 Resistance As in4.5.2 Group B inspection To be conducted on a sampling basis, lot-by-lot Sub-group B1 Destructive S-3 2,5% 4.17.1 Soldering-Solder
37、ability (Seenote6) Method1. (The detail specification shall indicate whether the terminations are suitable for printed wiring) As in4.17EN140202:1996 BSI 09-1999 7Table2 Inspection requirements See notes on page10 Clause number and test Conditions of test Sample size and criterion of acceptability P
38、erformance requirements p n c Group C inspection To be conducted on a sampling basis, at the periodicity given in column “p” Sub-group C1 Destructive 3 20 1 4.24 Damp heat, steadystate Visual examination Resistance Insulation resistors (Insulated resistors only) As in4.24.4 %R:k (.%R+.7) R:U 100M7 S
39、ub-group C2 Destructive 3 20 1 4.25.2 Endurance at room temperature Duration at1000h Examination at48, 500 and1000h Visual examinations Resistance Examination at1000h Insulation resistance (Insulated resistors only) As in4.25.2.7 %R:k (.%R + .7) R:U 100M7 Sub-Group C3 Non-destructive 3 20 1 4.4.2 Di
40、mensions (gauging) As specified in the detail specification Group D inspection To be conducted on a sampling basis at the periodicity given in column “p” Sub-Group D1 Destructive 36 20 1 Half of the sample 4.16 Robustness of terminations Tensile, bending and torsion tests. Visual examination Resista
41、nce As in4.16.6.1 %R: k (.%R+.7)EN140202:1996 8 BSI 09-1999Table2 Inspection requirements See notes on page10 Clause number and test Conditions of test Sample size and criterion of acceptability Performance requirements p n c 4.18.2 Soldering Resistance to heat (The detail specification shall indica
42、te whether Method1A or Method1B of Test Tb of IEC68-2-20 shall apply.) Visual examination Resistance As in4.18.3 %R:k (.%R+. 7) Other half of the sample 4.19 4.20 4.21 Rapid change of temperature Bump (Seenote5) Shock (Seenote5) T A : Lower category temperature T B : Upper category temperature Visua
43、l examination Resistance Acceleration:390m/s 2 No.of bumps:4000 (Seenote4) Visual examination Resistance Acceleration:490m/s 2 Pulse duration:11ms Waveform: Half sine Severity:3 successive shocks to be applied in each sense of the three mutually perpendicular directions specified in the detail speci
44、fication (total18 shocks) (seenote4) Visual examination Resistance As in4.19.3 %R:k (.%R+.7) As in4.20.4 %R:k (.%R+.7) As in4.21.5 %R:k (.%R+.7)EN140202:1996 BSI 09-1999 9Table2 Inspection requirements See notes on page10 Clause number and test Conditions of test Sample size and criterion of accepta
45、bility Performance requirements p n c 4.22 Vibration Procedure: B4 Frequency range: .Hzto.Hz Amplitude:0,75mm or98m/s 2(whichever is the less severe) Sweep endurance: Total duration:6h (seenote4) Visual examination Resistance As in4.22.4 %R:k (.%R+.7) All of the sample 4.23 Climatic sequence Dry hea
46、t Damp heat, cyclic, first cycle Cold Low air pressure Damp heat, cyclic, remaining cycles Final measurements 8,5kPa(85mbar) Visual examination Resistance Insulation resistance (Insulated resistors only) As in4.23.8 %R:k (.%R+.7) R:U 100M7 Sub-Group D2 Destructive 36 20 1 4.4.3 4.25.3 Dimensions (de
47、tail) Endurance at upper category temperature Duration:1000h Examination at48,500 and1000h Visual examination Resistance Examination at1000h Insulation resistance (Insulated resistors only) As specified in the detail specification As in4.25.3.7 %R:k (.%R+.7) R:U 1G7EN140202:1996 10 BSI 09-1999Table2
48、 Inspection requirements Clause number and test Conditions of test Sample size and criterion of acceptability Performance requirements p n c Sub-group D3 Non-destructive 36 20 1 LCT/ 20 20/ UCT 4.8 Temperature characteristics of resistance %R:k .%R .%R Sub-group D4 Non-destructive 36 20 1 4.7 Voltag
49、e proof Insulated resistors only As in4.7.3 NOTE 1Clause numbers of tests and performance requirements refer to EN140000. NOTE 2Inspection levels (IL) and AQLs are selected fromIEC410. NOTE 3In this table: p=periodicity (in months) n=sample size c=acceptance criterion LCT=Lower category temperature UCT=Upper category temperature NOTE 4Resistors shall be mounted by their normal means. Where this is by axial wire terminations, the distance betwee
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