1、BRITISH STANDARD BS EN 140203:1997 Harmonized system of quality assessment for electronic components Blankdetail specification: Fixed power resistors (Assessment level H) The European Standard EN 140203:1996 has the status of a British Standard ICS 31.040.10BSEN140203:1997 This British Standard, hav
2、ing been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 September 1997 BSI 09-1999 ISBN 0 580 27786 0 National foreword This British Standard is the English language version of EN 140203:1996 publis
3、hed by the European Electronic Components Committee (CECC) of the European Committee for Electrotechnical Standardization (CENELEC). It supersedes BS CECC 40203:1981 which will be withdrawn on 1998-02-15. The UK participation in its preparation was entrusted by Technical Committee EPL/40, Capacitors
4、 and resistors 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 inf
5、ormed; monitor 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
6、 which lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internatio
7、nal Standards Correspondence Index”, or by 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 Briti
8、sh 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, theEN title page, pages 2 to 12 and a back cover. This standard has been updated (see copyright date) and may have had amendments inco
9、rporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN140203:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 140203 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPI
10、SCHE NORM EN 140203 November 1996 Supersedes CECC 40203:1981 Descriptors: Electronic components, fixed power resistors, blank detail specification, assessment level H English version Blank Detail Specification: Fixed power resistors (Assessment level H) Spcification particulire cadre: Rsistancesfixe
11、s forte dissipation (Niveaudassurance do qualit H) Vordruck fr Bauartspezifikation: Hochbelastbare Festwiderstnde (Bewertungsstufe H) This European Standard was approved by CENELEC on 1996-03-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit
12、ions for giving this European Standard the status 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 thr
13、ee official versions (English, French, German). 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 electrotechnic
14、al committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechn
15、ique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 140203:1996 EEN140203:1996 BSI 09-1999 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC/CECC SC40X
16、B, Resistors (former CECC/WG 4A) The text of the draft based on document CECC(Secretariat)3561 was submitted to the formal vote; together with the voting report, circulated as document CECC(Secretariat)3682, it was approved as EN 140203 on 1996-03-14. This European Standard supersedes CECC40203:1981
17、. The following dates were fixed: Contents Page Foreword 2 1 Ratings and characteristics 5 2 Marking 6 3 Related documents 6 4 Ordering information 6 5 Certified test records 6 6 Additional information 6 7 Inspection requirements 6 8 Assessed process average procedures 6 Figure 1 Heat-sink area dera
18、ting curve 5 Table 1 Dimensions 4 Table 2 Inspection requirements 7 latest date by which the EN has to be implemented at national level by publication ofan identical national standard or by endorsement (dop) 1997-02-15 latest date by which the national standards conflictingwith the EN haveto be with
19、drawn (dow) 1998-02-15EN140203:1996 BSI 09-1999 3 Key for page 4 The numbers between square brackets 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 au
20、thority the detail specification is drafted. 2 The CECC Symbol and the number allotted to the national 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 i
21、ssue and any further information required by the national system. Identification of the resistor 5 A short description of the type of resistor. 6 Information on typical construction (where applicable) e.g. wire wound. 7 Outline drawing with main dimensions which are of importance for interchangeabil
22、ity and/or reference to the national or international documents for outlines. 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 Refer
23、ence data on the most important properties, to allow comparison between the various resistor types.EN140203:1996 4 BSI 09-1999 All dimensions are in millimetres. Specification available from: 1 CECC 40203-XXX 2 4 ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH: 3 Outline and dimensions:
24、 (see Table 1) (First angle protection) 7 5 FIXED POWER RESISTORS 6 8 ASSESSMENT LEVEL “H” NOTEThese resistors are (not) suitable for printed wiring applications. Table 1 Dimensions 9 Style Maximum element temperature ( C) Rated dissipation ona standard heat-sink (W at 25 C) Maximum dissipation at70
25、 C without heat-sink (W) Limiting element voltage (V d.c. or a.c.rms.) Isolation voltage (V d.c. or a.c.peak) Maximum dimensions (mm) NOTEThe definitions of maximum element temperature and rated dissipation on a standard heat-sink are given in EN 140000 See the relevant Register of Approvals for the
26、 availability of components qualified to this detail specification.EN140203:1996 BSI 09-1999 5 1 Ratings and characteristics 1.1 Derating Resistors covered by this specification are derated in accordance with the derating curve given in Figure 1. a Resistance range . 7 to . 7 Standard selection tole
27、rances . % Climatic category . / . / . Vibration severity . Hz to . Hz; 0,75 mm or 98 m/s 2(whichever is the less severe) Bump severity or Shock severity 390 m/s 2 ; 4 000 bumps 490 m/s 2 ; 11 ms Low air pressure 8,5 kPa (85 mbar) Limits of resistance change (. %R + . 7) Temperature characteristic o
28、f resistance (20 C to 70 C) %R: k . %R %R/R: k . %(. 10 6 / C) 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. Surface area of one face of heat-sink T a= ambient t
29、emperature in C P n= rated dissipation Figure 1 Heat-sink area derating curveEN140203:1996 6 BSI 09-1999 They also derate linearly from the rated dissipation to zero dissipation at an ambient temperature equal to maximum element temperature (see EN 140000). When mounted on heat-sinks other than the
30、referee heat-sink, the allowable dissipation may alternatively be calculated from the thermal resistance of the heat-sink used, the maximum element temperature, the thermal resistance of the referee heat-sink, the rated dissipation and the dissipation at 70 C without a heat-sink. NOTEVarious paramet
31、ers 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 be used.
32、 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 of 2.4 of EN140000. 3 Related documents National Authorised Institutions will complet
33、e this section, making refer 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: 1) Resistance value. 2) Tolerance. 3
34、) Style and national specification number of this detail specification. 5 Certified test records The detailed specification shall indicate in this clause whether certified test records shall be prepared in accordance with 3.9 of EN 140000. 6 Additional information (not for inspection purposes) The d
35、etail specification 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 (see Table 2) 7.1 Pre-test drying (4.3 of EN 140000
36、) is not required for resistors covered by this detail specification. 7.2 When it is desired to obtain qualification approval by adopting the fixed sample size procedure, use shall be made of the test schedule given for that purpose in Table A.1 or A.2 of Annex A of EN 140200. The substitution of te
37、sts, the conditions of test and the performance requirements shall be identical to those prescribed for quality conformance inspection in the detail specification. 8 Assessed process average procedures When the Assessed Process Average Procedure as specified in CECC 00014 is used, the detailed speci
38、fication shall give the limits that are required in 3.12 of EN 140000. The detail specification shall prescribe at relevant places that non-operatives have to be recorded.EN140203:1996 BSI 09-1999 7 Table 2 Inspection requirements See notes on page 12 Clause number and test Conditions of test IL AQL
39、 Performance requirements (See note 2) Group A Inspection To be conducted on a sampling basis, lot-by-lot Sub-group A1 Non-destructive S-4 1,0 % 4.4.1 Visual examination As in 4.4.1 4.4.1 Marking As in 4.4.1 Sub-group A2 Non-destructive S-4 1,0 % 4.4.3 Dimensions (gauging) As specified in the detail
40、 specification 4.5Resistance As in 4.5.2 Group B Inspection To be conducted on a sampling basis, lot-by-lot Sub-group B1 Non-destructive S-3 1,0 % 4.7Voltage proof see Note 4 As in 4.7.3 Sub-group B2 Destructive S-3 4,0 % 4.17.1 Soldering- Solderability (The detail specification shall state which me
41、thod shall be used. If method 1 is specified, the detail specification shall state the duration of the immersion either (2 0,5) s or(5 0,5) s. If method 2 isspecified, the soldering iron shall be size A). As in 4.17 4.16Robustness of terminations Tensile test Visual examination As in 4.16.6.1 Resist
42、ance R: k (.%R + . 7)EN140203:1996 8 BSI 09-1999Table 2 Inspection requirements See notes on page 12 Clause number and test Conditions of test IL AQL Performance requirements 4.13Overload Resistor style Preferred load duration (s) S-3 4,0 % 0,5 1 2 5 10 20 Voltage: The applied voltage shall be that
43、required to dissipate 5 times the rated dissipation, or it shall be the insulation voltage (whicheveristhe less). The resistor shall be mounted on thereference heat-sink. Visual examination As in 4.13.4 Resistance R: k (. %R + . 7) Sub-group B3 Non-destructive S-3 2,5 % 4.8Temperature characteristic
44、 of resistance This test is applicable only where atemperature coefficient of less than50. 10 6 / C is claimed. One cycle of 20 C to 70 C to20Conly. R: k + . %REN140203:1996 BSI 09-1999 9Table 2 Inspection requirements See notes on page 12 Clause number and test Conditions of test Sample size and cr
45、iterion ofacceptability Performance 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 Half of the sample 4.16Robustness of terminations Tensile, bending and torsion tests, as applicable to the type of term
46、ination. Visual examination As in 4.16.6.1 Resistance R: k (. %R + . 7) 4.18.2 Soldering- Resistance to heat Method 1B of Test Tb of IEC 68-2-20 Visual examination As in 4.18.2.3 Resistance R: k (. %R + . 7) Other half of the sample 4.19Rapid change oftemperature T A : Lower category temperature T B
47、 : Upper category temperature Visual examination As in 4.19.4 Resistance R: k (. %R + . 7) 4.20Bump (See note 6) Acceleration: 390 m/s 2 No. of bumps: 4 000 (seenote 5) Visual examination As in 4.20.4 Resistance R: k (. %R + . 7) 4.21Shock (See note 6) Acceleration: 490 m/s 2 Pulse duration: 11 ms W
48、aveform: Half sine Severity: 6 shocks (See note 5) Visual examination As in 4.21.5 Resistance R: k (. %R + . 7)EN140203:1996 10 BSI 09-1999Table 2 Inspection requirements See notes on page 12 Clause number and test Conditions of test Sample size and criterion ofacceptability Performance requirements
49、 p n c 4.22Vibration Procedure: B4 Frequency range: . Hz to . Hz Amplitude: 0,75 mm or98m/s 2(whichever is the less severe) Sweep endurance: Total duration: 6 h (See note 5) Visual examination As in 4.22.3 Resistance R: k (. %R + . 7) All of the sample 4.23Climatic sequence Dry heat Damp heat, cyclic, first cycle Cold Low air 8,5 kPa (85 mbar) pressure Damp heat, cyclic, remaining cycles Final measurements Visual examinati
