1、BSI Standards PublicationBS EN 140402-801:2015Detail specification: Fixed low power wirewound surface mount (SMD) resistors Rectangular Stability classes 0,5; 1; 2BS EN 140402-801:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation ofEN 140402-801:2015. It supersedes
2、 BS EN 140402-801:2005 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EPL/40X, Capacitors and resistors for electronic equipment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does no
3、t purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 78445 3 ICS 31.040.10 Compliance with a British Standard cannot confer immunity from legal
4、obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 140402-801 April 2015 ICS 31.040.10 Super
5、sedes EN 140402-801:2005English Version Detail specification: Fixed low power wirewound surface mount (SMD) resistors - Rectangular - Stability classes 0,5; 1; 2 Spcification particulire: Rsistances fixes bobines faible dissipation pour montage en surface (CMS) - Rectangulaire - Catgories de stabili
6、t 0,5; 1; 2 Baurtspezifkaton: Oberflchenmotierba drahtgewickelte Festwiderstnde (SMD) niedriger Belastbarkeit - Rechteckig - Stabilittsklassen 0,5; 1; 2 This European Standard was approved by CENELEC on 2014-12-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which s
7、tipulate the 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 CEN-CENELEC Management Centre or to any CENELEC member. This Eur
8、opean Standard exists 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC m
9、embers are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands,
10、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Av
11、enue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 140402-801:2015 EBS EN 140402-801:2015Contents Foreword 4 1 Characteristics and ratings 6 1.1 General 6 1.2 Dimensions and ratings 6 1.3 Derating c
12、urve 7 1.4 Resistance range and tolerance on rated resistance . 7 1.4.1 Level P 7 1.4.2 Level R 8 1.5 Variation of resistance with temperature and temperature rise . 9 1.6 Climatic categories 10 1.7 Limits for change of resistance at tests 10 1.8 Non-linearity . 12 1.9 Tests related to soldering . 1
13、2 1.9.1 Severities for solderability testing 12 1.9.2 Severities for testing resistance to soldering heat 12 1.10 Marking, packaging and ordering designation . 12 1.10.1 Marking of the component . 12 1.10.2 Packaging 12 1.10.3 Marking of the packaging . 12 1.10.4 Ordering information 12 1.11 Additio
14、nal information (not for inspection purpose) . 13 1.11.1 Storage . 13 1.11.2 Mounting 13 1.11.3 Soldering process . 13 1.11.4 Conductive gluing . 14 1.11.5 Use of cleaning solvents 14 1.11.6 Pulse load capability . 14 2 Quality assessment procedures 21 2.1 General 21 2.1.1 Zero defect approach 21 2.
15、1.2 100 % Test 21 2.1.3 Certificate of Conformity (CoC) . 21 2.1.4 Certified test records 22 2.1.5 Failure rate level 22 2.2 Qualification approval . 22 2.2.1 General . 22 2.2.2 Level P 22 2.2.3 Level R 22 2.3 Quality conformance inspection 22 2.3.1 General . 22 2.3.2 Qualification approval accordin
16、g to QC 001002-3:2005, Clause 3 . 23 2.3.3 Technology approval according to QC 001002-3:2005, Clause 6 23 2.3.4 Non-conforming items 23 Annex A (normative) Fixed sample size Qualification Approval and Quality Conformance Inspection test schedule for fixed low power wire wound SMD resistors 24 Annex
17、B (informative) Letter symbols and abbreviations . 34 EN 140402-801:2015BS EN 140402-801:2015B.1 Letter symbols 34 B.2 Abbreviations . 35 Annex C (normative) Normative references 36 Annex D (normative) Mounting of components 37 D.1 Layout for mechanical tests . 37 D.2 Layout for electrical test 38 B
18、ibliography . 39 EN 140402-801:2015BS EN 140402-801:2015Foreword This document (EN 140402-801:2015) has been prepared by CLC/TC 40XB “Resistors“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard
19、 or by endorsement (dop) 2015-12-15 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2017-12-15 This European Standard supersedes EN 140402-801:2005. Preceding document on the subject covered by this specification has been: CECC 40 402-801:2000-02
20、. EN 140402-801:2015 includes the following significant technical changes with respect to EN 140402-801:2005: adoption of P70as the rated dissipation, leaving the prior used P25as an additional information; for style RW1607M, increase of P70to 2,4 W, with P25= 3,0 W; introduction of a test on the re
21、sistance to electrostatic discharge (ESD) in 1.7 and Annex A; introduction of code letters for the temperature coefficient (TCR) as in EN 60062:2005; revision of ordering information in 1.10.4; adoption of the IECQ rules of procedure according to QC 001002-3:2005; revision of the sample quantities a
22、nd the sequence of tests in Annex A; editorial revision. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This specification is part of
23、 a series of documents describing fixed low power wire wound surface mount (SMD) resistors as follows: EN 60115-1, Fixed resistors for use in electronic equipment Part 1: Generic specification (IEC 60115-1, modified) EN 60115-8, Fixed resistors for use in electronic equipment Part 8: Sectional speci
24、fication Fixed surface mount resistors (IEC 60116-8, modified) This detail specification. Any detail specification within this series is written on the basis of EN 140402, Blank Detail Specification: Fixed low power wirewound surface mount (SMD) resistors. _ EN 140402-801:2015BS EN 140402-801:2015Sp
25、ecification available from CENELEC Central Secretariat, Avenue Marnix 17, B 1000 Brussels, or from the National Committees members of CENELEC EN 140402-801 Electronic components of assessed quality in accordance with: EN 60115-1:2011 EN 60115-8:2012 EN 140402:2015 Issue 2 April 2015 Other shapes are
26、 permitted within the given dimensions. Figure 1 Outline and dimensions (see Table 1) Fixed low power wire wound resistors with rectangular base for surface mounting. Style: RW Wire wound, insulated resistor with end terminations for application on printed board and flexible foils. Assessment level
27、EZ aLevel P: with 100 %-test Level R: with failure rate level and 100 %-test Stability classes 0,5; 1 and 2 aSee 2.1.1 for an explanation on the assessment level EZ. EN 140402-801:2015BS EN 140402-801:20151 Characteristics and ratings 1.1 General Various parameters of this component are precisely de
28、fined in this specification. Unspecified parameters may vary from one component to another. 1.2 Dimensions and ratings The shape and dimensions of the resistors covered by this specification are shown in Figure 1, with the specific styles and their respective dimensions given in Table 1. Other shape
29、s are permissible within the given dimensions. Table 1 Style and dimensions Style aLength L mm Width W mm Height H mm Termination width D mm Termination seating length J mm Mass bmg metric inchbmin. max. min. max. min. max. min. max. min. max. max. RW0503M RW2012 4,6 5,6 2,0 3,6 2,0 3,6 1,0 2,0 0,7
30、1,4 120 RW0704M RW2515 5,7 8,0 3,0 4,5 2,4 4,5 1,0 3,0 0,8 1,6 250 RW1107M RW4527 9,8 12,5 5,5 7,5 3,9 6,0 1,8 5,6 1,4 2,8 1 000 RW1607M RW6927 14,5 19,0 5,5 7,5 5,5 7,5 3,0 5,8 1,4 2,8 2 000 aThe given styles correspond to the historical styles of the prior CECC 40 402-801 as follows: Style Histori
31、c style RW0704M RW1 RW1107M RW2 RW1607M RW3 bFor information only. NOTE Information about manufacturers who have components qualified to this detail specification is available in the approvals section of the website http:/www.iecq.org. Table 2 Ratings StyleRated dissipationMaximum dissipationaLimiti
32、ng element voltage d.c. or a.c. (r.m.s.) bInsulation voltage d.c. or a.c. (peak) P70W P25W UmaxV UinsV 1 mincontinuousRW0503M 0,6 0,75 28 500 75 RW0704M 0,8 1,0 50 500 75 RW1107M 1,6 2,0 112 500 75 RW1607M 2,4 3,0 200 500 75 aFor information only. bFor all resistance ranges given in Tables 3 and 4,
33、the applicable voltage is determined by the rated or maximum dissipation and not limited by the limiting element voltage.EN 140402-801:2015BS EN 140402-801:20151.3 Derating curve The permissible dissipation of resistors covered by this detail specification is the rated dissipation as given in Table
34、2, which is derated for an ambient temperature above the rated temperature 70 C according to the diagram in Figure 2. The manufacturer of the resistors covered by this detail specification may uprate the products by specification of an increased dissipation up to the maximum dissipation given in Tab
35、le 2, which is derated for an ambient temperature above the reference temperature of 25 C according to the diagram in Figure 2. The manufacturer shall support such uprating with respective test results. Key X ambient temperature amb Y fraction of the rated dissipation P70Figure 2 Derating curve NOTE
36、 Climatic tests and the assessment of the temperature coefficient of resistance apply the upper category temperature, UCT, as the highest temperature, whereas the loads applied under endurance testing aim to subject the resistive element to the maximum element temperature, MET. The use of the full s
37、pecified dissipation and temperature range results in a high temperature on the substrate (PCB) and in the solder joints. It may hence be required to select suitable substrate material and suitable solder material in order to maintain the reliability of the assembly. 1.4 Resistance range and toleran
38、ce on rated resistance 1.4.1 Level P NOTE Product classification to Level P adopts and succeeds the former Version A as used in prior revisions of this detail specification. Table 3 gives the combinations of temperature coefficient, tolerance on resistance and resistance range which may be approved
39、to Level P according to this detail specification. The respective E Series are specified as a recommendation only for Level P. EN 140402-801:2015BS EN 140402-801:2015Products from the extent given in Table 3 shall be used for the initial product qualification approval to Level P according to 2.2.2,
40、and for the quality conformance inspection according to 2.3. The qualification of resistances below or above the specified resistance ranges is permissible if they fulfil the requirements of the stability class prescribed for the closest resistance within a specified range; e.g. resistors of Style R
41、W0704M, 1 %, 2,43 k shall fulfil the requirements of stability class 1. Table 3 Resistance range and tolerance on rated resistance for Level P Style Tolerance on rated resistance Temperature coefficientaResistance range Stability class E Series c% Code b 10-6/K Code bRW0503M 5 J See Table 5. 0,047 t
42、o 1 k 2 E24 1 F 0,1 to 1 k 1 E96 0,5 D 0,1 to 1 k 0,5 E192 RW0704M 5 J 0,047 to 2,4 k 2 E24 1 F 0,1 to 2,43 k 1 E96 0,5 D 0,1 to 2,43 k 0,5 E192 RW1107M 5 J 0,047 to 5,6 k 2 E24 1 F 0,1 to 5,62 k 1 E96 0,5 D 0,1 to 5,62 k 0,5 E192 RW1607M 5 J 0,047 to 13 k 2 E24 1 F 0,1 to 13 k 1 E96 0,5 D 0,1 to 13
43、 k 0,5 E192 aThe waivers given in EN 60115-1:2011, 4.8.5 concerning the measurement of the temperature coefficient at resistors below 10 and below 5 shall not apply for this specification. A suitable test method shall be applied in order to ensure the required measurement accuracy. bCode letters acc
44、ording to EN 60062. cE Series according to IEC 60063. The range of resistors approved in each style, together with the associated temperature coefficient and tolerance, shall be given in the register of approvals, as available for example on the website http:/www.iecq.org. 1.4.2 Level R NOTE Product
45、 classification to Level R adopts and succeeds the former Version E as used in prior revisions of this detail specification. Table 4 gives the combinations of temperature coefficient, tolerance on resistance, resistance range and mandatory E Series which may be approved to Level R according to this
46、detail specification. Products from the extent given in Table 4 shall be used for the initial product qualification approval to Level P according to 2.2.3, and for the quality conformance inspection according to 2.3. EN 140402-801:2015BS EN 140402-801:2015Table 4 Resistance range and tolerance on ra
47、ted resistance for Level R Style Tolerance on rated resistance Temperature coefficient aResistance range Stability class E Series c% Code b10-6/K Code bRW0503M 5 J See Table 5 0,47 to 510 2 E24 0,5 D 0,464 to 511 0,5 E96 RW0704M 5 J 0,47 to 1,2 k 2 E24 0,5 D 0,475 to 1,21 k 0,5 E96 RW1107M 5 J 0,47
48、to 3,0 k 2 E24 0,5 D 0,475 to 3,01 k 0,5 E96 RW1607M 5 J 0,47 to 6,8 k 2 E24 0,5 D 0,475 to 6,81 k 0,5 E96 aThe waivers given in EN 60115-1:2011, 4.8.5 concerning the measurement of the temperature coefficient at resistors below 10 and below 5 shall not apply for this specification. A suitable test
49、method shall be applied in order to ensure the required measurement accuracy. bCode letters according to EN 60062. cE Series according to IEC 60063. The range of resistors approved in each style, together with the associated temperature coefficient and tolerance, shall be given in the register of approvals, as available for example on the website http:/www.iecq.org. 1.5 Variation of resistan
