BS EN 140200-1997 Harmonized system of quality assessment for electronic components - Sectional specification fixed power resistors《电子元器件质量评定协调体系 分规范 电源固定电阻器》.pdf

1、BRITISH STANDARD BS EN 140200:1997 Incorporating Amendment No. 1 Harmonized system of quality assessment for electronic components Sectional specification: Fixed power resistors The European Standard EN 140200:1996, with the incorporation of amendment A1:2001, has the status of a British Standard IC

2、S 31.040.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 140200:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 199

3、7 BSI 15 April 2002 ISBN 0 580 27789 5 National foreword This British Standard is the English language version of EN 140200:1996, including amendment A1:2001, published by the European Electronic Components Committee (CECC) of the European Committee for Electrotechnical Standardization (CENELEC). It

4、 supersedes BS CECC 40200:1981 which will be withdrawn on 1998-02-15. The UK participation in its preparation was entrusted by Technical Committee EPL/40, Capacitors and resistors for electronic equipment, to Subcommittee EPL/40/2, Resistors, which has the responsibility to: aid enquirers to underst

5、and the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommitte

6、e can be obtained on request to its secretary. Cross-references 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 “International Standards Correspondence Index”, or using th

7、e “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 applica- tion. Compliance with a British Standard does not of itself confer immunity fr

8、om legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments is

9、sued since publication Amd. No. Date Comments 13542 15 April 2002 Revision of 3.1.1BS EN 140200:1997 BSI 15 April 2002 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 140200 5ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 140200 November 1996 + A1 August 2001

10、 ICS 31.040.10 Supersedes CECC 40 200:1981 Descriptors: Electronic components, fixed power resistors, sectional specification English version Sectional Specification: Fixed power resistors (includes amendment A1:2001) Spcification intermdiaire: Rsistances fixes forte dissipation (inclut lamendement

11、A1:2001) Rahmenspezifikation: Hochbelastbare Festwiderstnde (enthlt nderung A1:2001) This European Standard was approved by CENELEC on 1996-03-14. Amendment A1:2001 was approved by CENELEC on 2000-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate th

12、e conditions 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 exist

13、s in three 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 electr

14、otechnical 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 Elec

15、trotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 140200:1996 + A1:2001 EEN 140200:1996 BSI 15 April 2002 2 Foreword This European Standard was prepared by the Technical Commit

16、tee CENELEC TC/CECC SC40XB, Resistors (former CECC/WG 4A). The text of the draft based on document CECC(Secretariat)3480 was submitted to the formal vote; together with the voting report, circulated as document CECC(Secretariat)3679, it was approved as EN 140200 on 1996-03-14. This European Standard

17、 supersedes CECC 40 200:1981. The following dates were fixed: Foreword to amendment A1 This amendment to the European Standard EN 140200 was prepared by the Technical Committee CENELEC TC 40XB, Fixed resistors. The text of the draft was submitted to the formal vote and was approved by CENELEC as ame

18、ndment A1 to EN 140200:1996 on 2000-04-01. The following dates were fixed: Contents Page Foreword 2 1S c o p e 5 2 Preferred characteristics, ratings and severities for environmental and overload tests 5 2.1 Characteristics 5 2.1.1 Climatic severities 5 2.1.2 Temperature characteristics and temperat

19、ure coefficients of resistance 5 2.1.3 Limits for change in resistance 6 2.2 Preferred value ratings 6 2.2.1 Rated resistance 6 2.2.2 Tolerances on rated resistance 6 2.2.3 Rated dissipation 7 2.2.4 Limiting element voltage 7 2.2.5 Insulation resistance 7 2.2.6 Insulation voltage 8 2.3 Severities fo

20、r environmental and overload test 8 2.3.1 Drying 8 2.3.2 Vibration 8 2.3.3 Low air pressure 8 2.3.4 Bump 8 2.3.5 Shock 8 2.3.6 Overload 8 2.4 Information to be given in detail specification 9 2.4.1 Style 9 2.4.2 Rated dissipation 9 2.4.3 Limiting element voltage 9 2.4.4 Dimensions 9 2.4.5 Resistance

21、 range 9 2.4.6 Tolerances on rated resistance 9 2.4.7 Climatic category 9 2.4.8 Vibration severity 10 2.4.9 Low air pressure severity 10 2.4.10 Bump severity 10 2.4.11 Shock severity 10 2.4.12 Limits of resistance change after 1 000 h endurance test 10 2.4.13 Temperature characteristic of resistance

22、 10 2.4.14 Overload 10 2.4.15 Derating curve 10 2.4.16 Marking 10 2.4.17 Ordering information 10 latest date by which the EN has 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 conflic

23、ting with the EN have to be withdrawn (dow) 1998-02-15 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-03-01 latest date by which the national standards conflicting with the amendment have to be

24、withdrawn (dow) 2003-04-01EN 140200:1996 BSI 15 April 2002 3 Page 2.4.18 Additional information (not for inspection purposes) 10 3I n s p e c t i o n 1 1 3.1 Formation of inspection lots 11 3.1.1 General 11 3.1.2 Lot-by-lot testing 11 3.1.3 Periodic testing 11 3.2 Test methods 11 3.3 Qualification a

25、pproval 12 3.4 Assessed process average procedures (APA) 12 3.5 Delayed delivery 12 Annex A.1 Fixed sample size Qualification Approval test schedules for fixed power resistors 13 Annex A.2 Fixed sample size Qualification Approval test schedule for fixed power resistors 17 Table 1 Percentage change i

26、n resistance 6 Table 2 Limits of change in resistance 64 blankEN 140200:1996 BSI 15 April 2002 5 1 Scope This sectional specification prescribes the preferred values for characteristics and ratings and also the inspection requirements for fixed power resistors of assessed quality having a rated diss

27、ipation of up to 1 000 W. It selects from the generic specification, EN 140000, the appropriate methods of test to be used in detail specifications derived from this specification. Associated with this specification are one or more blank detail specifications each referenced by a CECC number. A blan

28、k detail specification which has been completed as specified in 2.5 of this specification forms a detail specification. Such detail specifications may be used for the granting of Qualification Approval to a resistor and for the performance of Quality Conformance Inspection in accordance with the CEC

29、C System. 2 Preferred characteristics, ratings and severities for environmental and overload tests 2.1 Characteristics The values given in detail specifications shall preferably be selected from the following. 2.1.1 Climatic severities The resistors covered by this document are classified into clima

30、tic categories according to the general rules given in the Appendix to IEC 68-1. The preferred severities for the cold, dry heat and damp heat, steady state, tests are within the following ranges: Values selected within these ranges shall be chosen from those listed in the relevant tests of IEC 68-2

31、. The severities for the cold and dry heat tests are the lower and upper category temperatures. For some resistors, these temperatures will occur between two of the preferred temperatures given in IEC 68-2. In this case, the nearest preferred temperature within the category temperature range of the

32、resistors shall be chosen for this severity. 2.1.2 Temperature characteristics and temperature coefficients of resistance The preferred limits of change in resistance for the temperature characteristics of resistance test are given in Table 1. Each line in Table 1 gives the temperature coefficient q

33、uoted in parts per million per C and per cent per C and limits of change in resistance for the measurement of temperature characteristics of resistance (4.8 of EN 140000) on the basis of the category temperature ranges of 2.1.1 of this document. Cold (Test A) 10 C to 55 C Dry heat (Test B) +85 C to

34、+200 C Damp heat, steady state (Test C) 4 days to 56 daysEN 140200:1996 6 BSI 15 April 2002 Table 1 Percentage change in resistance 2.1.3 Limits for change in resistance For each stability class the preferred limits for change in resistance in each of the tests listed in the heading of Table 2 are a

35、s indicated. NOTE The subclause numbers in the heading of the table refer to EN 140000. Table 2 Limits of change in resistance 2.2 Preferred value ratings 2.2.1 Rated resistance See 2.3.2 of EN 140000. 2.2.2 Tolerances on rated resistance The preferred tolerances on rated resistance are: 20 %; 10 %;

36、 5% ; 2% ; 1% ; 0,5 %; 0,25 %; 0,1 %; 0,05 %; 0,02 %; 0,01 %. Temperature Coefficient Reference temperature/Lower category temperature Reference temperature/Upper category temperature 10 6 / C C C +20/55 % +20/40 % +20/25 % +20/10 % 20/85 % 20/100 % 20/125 % 20/155 % 20/200 % 500 3,75 3,0 2,25 1,5 3

37、,25 4,0 5,25 6,75 9,0 250 1,88 1,5 1,125 0,75 1,625 2,0 2,62 3,38 4,5 50/+250 +0,375/ 1,88 +0,3/ 1,5 +0,225/ 1,125 +0,15/ 0,75 +0,325/ 1,625 0,4/ +2,0 0,525/ +2,62 0,675/ +3,38 0,90/ +4,5 100 0,75 0,6 0,45 0,3 0,65 0,80 ,05 1,35 1,80 50 0,375 0,3 0,225 0,15 0,325 0,40 0,525 0,675 0,90 25 0,188 0,150

38、 0,113 0,075 0,163 0,200 0,262 0,338 0,450 10 0,075 0,060 0,045 0,030 0,065 0,080 0,105 0,135 0,180 5 0,038 0,030 0,023 0,015 0,033 0,040 ,053 0,068 0,090 a NOTE If measurements are required at additional temperatures these shall be specified in the detail specification. a NOTE Text different to IEC

39、 115-2. Stability Class 4.23 Climatic sequence 4.16 Robustness of terminations 4.13 Overload 4.24 Damp heat, steady state 4.18 Resistance to solder heat 4.25 Endurance 4.19 Rapid temperature change 4.20 Bump 4.21 Shock 4.22 Vibration 10 (10 % R + 0,1 ohm) (1 % R + 0,05 ohm) (2 % R + 0,1 ohm) 5 (5 %

40、R + 0,1 ohm) (1 % R + 0,05 ohm) (1 % R + 0,05 ohm) 3 (3 % R + 0,1 ohm) (1 % R + 0,05 ohm) (1 % R + 0,05 ohm) 2 (2 % R + 0,1 ohm) (0,5 % R + 0,05 ohm) (0,5 % R + 0,05 ohm) 1 (1 % R + 0,05 ohm) (0,25 % R + 0,05 ohm) (0,25 % R + 0,05 ohm) 0,5 (0,5 % R + 0,05 ohm) (0,25 % R + 0,05 ohm) (0,25 % R + 0,05

41、ohm)EN 140200:1996 BSI 15 April 2002 7 2.2.3 Rated dissipation Ambient rated resistors. The preferred values of rated dissipation, in W at 70 C shall be taken from the R5 series of ISO 3. Heat sink resistors The preferred values of rated dissipation in an ambient temperature of 25 C, when mounted on

42、 a reference heat sink as defined in 4.25.2.4 of EN 140000, shall be taken from the R10 series of ISO 3. Derating curve The detail specification shall state the maximum allowable dissipation at temperatures other than 70 C. All break points on the curve shall be verified by test. A larger area of op

43、eration may be given in the detail specification provided it includes all the areas given above. An EXAMPLE of a derating curve having a larger area of operation is given below. In the example the maximum surface temperature (zero rating temperature) is higher than the upper category temperature. 2.

44、2.4 Limiting element voltage The preferred values of limiting element voltage, in V d.c. or in a.c.r.m.s., shall be taken from R5 series of ISO 3. 2.2.5 Insulation resistance The standard limits for insulation resistance shall be 1 G minimum or, after humidity tests, 100 M .EN 140200:1996 8 BSI 15 A

45、pril 2002 2.2.6 Insulation voltage See 2.2.17 of EN 140000. 2.3 Severities for environmental and overload tests Test severities given in detail specifications shall preferably be selected from the following. 2.3.1 Drying Procedure I of 4.3 of EN 140000 shall be used. 2.3.2 Vibration Test Fc (IEC 68-

46、2-6) Procedure B4. Resistors shall be mounted by their normal means. Where this is by axial terminations, the distance between the resistor body and the mounting point on the termination shall be 6 mm 1 mm. 2.3.3 Low air pressure Test M (IEC 68-2-13) 8,5 kPa (85 mbar) 2.3.4 Bump Test Eb (IEC 68-2-29

47、) Resistors shall be mounted by their normal means. Where this is by axial terminations, the distance between the resistor body and the mounting point on the termination shall be 6 mm 1 mm. 2.3.5 Shock Test Ea (IEC 68-2-27) Resistors shall be mounted by their normal means. Where this is by axial ter

48、minations, the distance between the resistor body and the mounting point on the termination shall be 6 mm 1 mm. 2.3.6 Overload For resistors with a limit of resistance change for endurance greater than 0,5 %. Frequency range: 10 Hz to 55 Hz, or 10 Hz to 500 Hz. Amplitude: 0,75 mm or 98 m/s 2(whichever is less severe). Sweep endurance: total duration: 6 h. Acceleration: 390 m/s 2 Number of bumps: 4 000 Acceleration: 490 m/s 2 Pulse duration: 11 ms Wave form: half-sine Severity: 3 successive shocks, to be applied in each sense of the three mutually perpendicular directions specified in the de