SIST EN 140402:2015
(Main)Blank Detail Specification: Fixed low power wirewound surface mount (SMD) resistors
Blank Detail Specification: Fixed low power wirewound surface mount (SMD) resistors
A blank detail specification is a supplementary document to the sectional specification and contains
requirements for style and layout and minimum content of detail specifications. Detail specifications not
complying with these requirements should not be considered as being in accordance with European
Standards nor should they be so described.
In the preparation of the detail specification the content of EN 60115-8:2012, 1.4 should be taken into
account.
The detail specification should be written by using the preferred values given in EN 60115-8.
The detail specification should contain a table of contents prior the first page of the actual specification.
For the use of SI units refer to EN ISO 80000-1, for the use of letter symbols to be used in electrical
technology, refer to EN 60027-1.
Vordruck für Bauartspezifikation: Oberflächenmontierbare drahtgewickelte Festwiderstände (SMD) niedriger Belastbarkeit
Spécification particulière cadre: Résistances fixes bobinées à faible dissipation pour montage en surface (CMS)
Okvirna podrobna specifikacija: upori, nespremenljivi, za male moči, žični, za površinsko montažo (SMD)
Okvirna podrobna specifikacija je dopolnilni dokument k področni specifikaciji, ki vključuje zahteve glede sloga, postavitve in minimalne vsebine podrobne specifikacije. Podrobnih specifikacij, ki niso v skladu s temi zahtevami, se ne sme šteti za skladne z evropskimi standardi in se jih ne sme opisovati kot take.
Pri pripravi podrobne specifikacije je treba upoštevati vsebino točke 1.4 standarda EN 60115-8:2012.
Podrobna specifikacija mora vključevati priporočene vrednosti, podane v standardu EN 60115-8.
Podrobna specifikacija mora vsebovati kazalo vsebine pred prvo stranjo dejanske specifikacije.
Za uporabo enot SI glej standard EN ISO 80000-1, za uporabo črkovnih simbolov za električno
tehnologijo glej standard EN 60027-1.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vordruck für Bauartspezifikation: Oberflächenmontierbare drahtgewickelte Festwiderstände (SMD) niedriger BelastbarkeitSpécification particulière cadre: Résistances fixes bobinées à faible dissipation pour montage en surface (CMS)Blank Detail Specification: Fixed low power wirewound surface mount (SMD) resistors31.040.10Fiksni uporFixed resistorsICS:Ta slovenski standard je istoveten z:EN 140402:2015SIST EN 140402:2015en01-junij-2015SIST EN 140402:2015SLOVENSKI
STANDARDSIST EN 140402:20021DGRPHãþD
SIST EN 140402:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 140402
April 2015 ICS 31.040.10
Supersedes
EN 140402:1998
English Version
Blank Detail Specification: Fixed low power wirewound surface mount (SMD) resistors
Spécification particulière cadre: Résistances fixes bobinées à faible dissipation pour montage en surface (CMS)
Vordruck für Bauartspezifikation: Oberflächenmontierbare drahtgewickelte Festwiderstände (SMD) niedriger Belastbarkeit This European Standard was approved by CENELEC on 2014-12-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 European 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 members 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, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue 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 140402:2015 E SIST EN 140402:2015
EN 140402:2015 - 2 -
Contents Foreword . 4 Introduction . 5 1 Characteristics and ratings . 7 1.1 General . 7 1.2 Dimensions and ratings . 7 1.3 Derating curve . 8 1.4 Resistance range and tolerance on rated resistance . 8 1.4.1 Level P . 8 1.4.2 Level R . 9 1.5 Variation of resistance with temperature and temperature rise . 10 1.6 Climatic categories . 11 1.7 Limits for change of resistance at tests . 11 1.8 Non-linearity . 13 1.9 Tests related to soldering . 13 1.9.1 Severities for solderability testing . 13 1.9.2 Severities for testing resistance to soldering heat . 13 1.10 Marking, packaging and ordering designation . 13 1.10.1 Marking of the component . 13 1.10.2 Packaging . 13 1.10.3 Marking of the packaging . 13 1.10.4 Ordering information . 13 1.11 Additional information (not for inspection purpose) . 14 1.11.1 Storage . 14 1.11.2 Mounting . 14 1.11.3 Soldering process . 14 1.11.4 Conductive gluing . 15 1.11.5 Use of cleaning solvents . 15 1.11.6 Pulse load capability . 15 1.11.7 Variation of resistance (drift) for lifetimes up to 200 000 h. 15 1.11.8 Dissipation notes . 15 2 Quality assessment procedures . 15 2.1 General . 15 2.1.1 Zero defect approach . 15 2.1.2 100 % Test . 16 2.1.3 Certificate of Conformity (CoC) . 16 2.1.4 Certified test records . 16 2.1.5 Failure rate level . 16 2.2 Qualification approval . 17 2.2.1 General . 17 2.2.2 Level P . 17 2.2.3 Level R . 17 2.3 Quality conformance inspection . 17 2.3.1 General . 17 2.3.2 Qualification approval according to QC 001002-3:2005, Clause 3 . 17 2.3.3 Technology approval according to QC 001002-3:2005, Clause 6 . 17 2.3.4 Non-conforming items . 18 SIST EN 140402:2015
- 3 - EN 140402:2015 Annex A (normative)
Fixed sample size Qualification Approval and Quality Conformance Inspection test schedule for fixed low power wire wound SMD resistors . 19 Annex B (informative)
Letter symbols and abbreviations . 29 B.1 Letter symbols . 29 B.2 Abbreviations . 30 Annex C (normative)
Normative references . 31 Bibliography . 32
SIST EN 140402:2015
EN 140402:2015 - 4 -
Foreword This document (EN 140402:2015) 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 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 document supersedes EN 140402:1998.
EN 140402:2015 includes the following significant technical changes with respect to EN 140402:1998: – introduction of a test on the resistance 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 and 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 supports the building of 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 specification — Fixed surface mount resistors (IEC 60115-8, modified) – EN 140402-8xx, Detail specification: Fixed low power wirewound surface mount (SMD) resistors — . Any detail specification within this series is written on the basis of this blank detail specification. __________ SIST EN 140402:2015
- 5 - EN 140402:2015 Introduction Blank detail specification A blank detail specification is a supplementary document to the sectional specification and contains requirements for style and layout and minimum content of detail specifications. Detail specifications not complying with these requirements should not be considered as being in accordance with European Standards nor should they be so described. In the preparation of the detail specification the content of EN 60115-8:2012, 1.4 should be taken into account. The detail specification should be written by using the preferred values given in EN 60115-8. The detail specification should contain a table of contents prior the first page of the actual specification. For the use of SI units refer to EN ISO 80000-1, for the use of letter symbols to be used in electrical technology, refer to EN 60027-1. This Blank Detail Specification uses two different kinds of notes: – NOTE
for notes which give additional information intended to assist the understanding or use of the resulting document and therefore should be copied as NOTE into the drafted Detail Specification. – NOTE (ed)
for editorial notes which are intended to aid and direct the specification writer and therefore should not be copied into the drafted Detail Specification. Identification of the detail specification and the component The first page of the detail specification should have the layout recommended on page 6. The numbers in square brackets correspond to the indications to be completed thereunder: [1] the name of the Standardisation Organisation under whose authority the detail specification is published and if applicable, the organisation from whom the detail specification is available; [2] the CECC symbol and the number allocated to the detail specification by the CENELEC General Secretariat; [3] the number and issue number of the EN generic and sectional specification as relevant; also national reference if different; [4] the national number of the detail specification, date of issue and any further information required by the national system, together with any amendment numbers, if different from the EN number; [5] a brief description of the component or range of components; [6] information on typical construction (where applicable); [7] an outline drawing with the main dimensions which are of importance for interchangeability and/or reference to the appropriate national or international document for outlines. Alternatively, this drawing may be given in an annex to the detail specification; [8] the level of quality assessment covered by the detail specification. For [5] and [6] the text to be given in the detail specification should be suitable for an entry in a register of approvals and the “CENELEC Catalogue of European Standards”. SIST EN 140402:2015
EN 140402:2015 - 6 -
Specification available from: [1]
EN 140402- . . . (Specification number)
[2]
Electronic components of assessed quality in accordance with: [3] EN 60115-1:2011 EN 60115-8:2012 EN 140402:2015 Issue . . .
[4] April 2015
[7]
Other shapes are permitted within the given dimensions. Figure 1 — Outline and dimensions (see Table 1) Fixed low power wire wound
[5] resistors
[6] (Description of the component)
Assessment level EZ a [8] Level P: with 100 %-test Level R: with failure rate level
and 100 %-test Stability classes . . . a See 2.1.1 for an explanation on the assessment level EZ. NOTE 1 (ed)
Level R is optional. NOTE 2 (ed)
The title block shown above is not part of the specification’s foreword or introduction and therefore needs to appear on top of a new page. The remainder of that page is intentionally left empty in order to start Clause 1 on top of the next page. SIST EN 140402:2015
- 7 - EN 140402:2015 1 Characteristics and ratings 1.1 General Various parameters of this component are precisely defined 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 shapes are permissible within the given dimensions. Table 1 — Style and dimensions Style a Length L
mm Width W
mm
mm
mm
mm Mass a
mg metric X a min. max. min. max. min. max. min. max. min. max. max.
a
For information only. NOTE 1 (ed)
Column X is optional for additional information (e.g. size code), which is for information only. NOTE 2 (ed)
See EN 60115-8:2012, 1.4.2. NOTE 3
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 Style Rated dissipation X
Limiting element voltage d.c. or a.c. (r.m.s.) Insulation voltage d.c. or a.c. (peak)
P70 W
Umax V Uins V
1 min continuous
NOTE 4 (ed)
Column X is an optional column for additional information, e.g. an additional maximum dissipation at another ambient temperature than 70 °C, hence e.g. at 25 °C or at 40 °C.
NOTE 5 (ed)
See EN 60115-8:2012, 1.4.8, 1.4.9 and 1.4.10. Should it be necessary to control further parameters, a more detailed specification should be used. Then the additional test method(s) shall be fully described and appropriate limits and inspection levels (IL) shall be specified. SIST EN 140402:2015
EN 140402:2015 - 8 -
1.3 Derating curve The permissible dissipation of resistors covered by this detail specification is the rated dissipation as given in Table 2, which is derated for an ambient temperature above the rated temperature 70 °C according to the diagram in Figure 2. NOTE 1 (ed)
See EN 60115-8:2012, 1.4.8. NOTE 2 (ed)
A larger area of operation may be given in the detail specification, provided it includes all the area given above. In such case the following paragraph applies. 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 Table 2, which is derated for an ambient temperature above the reference temperature of … according to the diagram in Figure 2. The manufacturer shall support such uprating with respective test results.
Key X ambient temperature ϑamb Y fraction of the rated dissipation P70 Figure 2 — Derating curve NOTE 3
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. NOTE 4 (ed)
The following paragraph applies if the maximum element temperature is specified above 155 °C The use of the full specified 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 tolerance on rated resistance 1.4.1 Level P NOTE 1
Product classification to Level P adopts and succeeds the former Version A as used in prior revisions of this detail specification. SIST EN 140402:2015
- 9 - EN 140402:2015 Table 3 gives the combinations of temperature coefficient, tolerance on resistance and resistance range which may be approved to Level P according to this detail specification. The respective E Series are specified as a recommendation only for Level P. Products from the extent given in Table 3 shall be used for the initial product qualification approval to Level P according to 2.2.2, 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 RW0704M, 1 %, > 2,43 kΩ 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 coefficient Resistance
range Stability class E
Series b % Code a
10-6/K Code a
a Code letters according to EN 60062. b E Series according to IEC 60063. NOTE 2 (ed)
Limits of the resistance ranges should only be values from an E Series, which is suitable for the considered tolerance. NOTE 3 (ed)
Information on the temperature coefficient may be given in Table 5, if it is distinctively linked with fixed resistance ranges and does not provide any ordering options. 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 1
Product 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 detail specification.
Products from the extent given in Table 4 shall be used for the initial product qualification approval to Level R according to 2.2.3, and for the quality conformance inspection according to 2.3. SIST EN 140402:2015
EN 140402:2015 - 10 -
Table 4 — Resistance range and tolerance on rated resistance for Level R Style Tolerance on rated resistance Temperature coefficient Resistance
range Stability class E
Series b % Code a 10-6/K Code a
a Code letters according to EN 60062. b E Series according to IEC 60063. NOTE 2 (ed)
Subclause 1.4.2 with Table 4 is only required if the drafted Detail Specification includes Level R and should be a subset of Table 3. NOTE 3 (ed)
Information on the temperature coefficient may be given in Table 5, if it is distinctively linked with fixed resistance ranges and does not provide any ordering options. 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 resistance with temperature and temperature rise The permissible limits for the reversible change of resistance at variation of resistance with temperature tests are given in Table 5 for the category temperatures applied in this detail specification. Table 5 — Temperature coefficients and permissible change of resistance Temperature coefficient X Limit of resistance change ∆R/R
%
Lower TCR Upper TCR
Code a Code b
LCT /
Reference temperature Reference temperature / UCT 10-6/K
-55 °C / 20 °C 20 °C / 200 °C
a Code letters according to EN 60062. b Historical code letters according to …. , for information only. NOTE 1 (ed)
The second code column with historical code references is optional. NOTE 2 (ed)
Column X is an optional column for resistance ranges, if the ranges are distinctively linked with temperature coefficients and this relationship does not provide any ordering options. NOTE 3 (ed)
See EN 60115-8:2012, 1.4.7. The permissible temperature rise (∆ϑ)max for the temperature rise test according to EN 60115-1:2011, 4.14 is given in Table 6. SIST EN 140402:2015
- 11 - EN 140402:2015 Table 6 — Limit of temperature rise Stability class Limit of temperature rise
at rated dissipation
∆ϑ ≤ …
∆ϑ ≤ …=The thermal resistance is calculated to Rth = (∆ϑ)max / P70. 1.6 Climatic categories The climatic categories applied in this detail specification are given in Table 7. NOTE 1 (ed)
See EN 60115-8:2012, 1.4.3. Table 7 — Climatic categories Stability class Climatic category LCT / UCT / Duration
… / … / …
… / … / … NOTE 2 (ed)
The following paragraph applies if UCT is lower than MET. The upper category temperature (UCT), which is used for a number of test procedures, is lower than the maximum element temperature (MET), which may be observed in application conditions. 1.7 Limits for change of resistance at tests The permissible limits for the change of resistance at tests are given in Table 8 for the stability classes applied in this detail specification. NOTE 1 (ed)
See EN 60115-8:2012, 1.4.4. SIST EN 140402:2015
EN 140402:2015 - 12 -
Table 8 — Limits for change of resistance at tests
Stability class Limit of resistance change ∆R Ω=Long term tests Short term tests Advanced stress tests EN 60115-1:2011 4.23
Climatic
sequence 4.24
Damp heat,
steady state 4.25.3 Endurance at
a maximum
temperature EN 60115-1:2011 4.25.1 Endurance at the rated
temperature 70 °C a or 4.25.2 Endurance at room
temperature EN 60115-1:2011 4.13 Short time overload 4.18 Resistance to soldering heat 4.19 Rapid change of temperature, 5 cycles 4.21 Shock 4.22 Vibration 4.33 Substrate
bending test EN 60115-1:2011 4.19 Rapid change of temperature, ≥ 100 cycles 4.27 Single-pulse high-voltage overload test
4.38 Electrostatic discharge b
EN 60115-1:2011 4.39 Periodic-pulse overload test 1 000 h Extended, 8 000 h
a Testing endurance at the rated temperature 70 °C is mandatory for Level R.
b Human body model (HBM) according to EN 61340-3-1, 3 positive + 3 negative discharges.
NOTE 2 (ed)
The number of cycles for the rapid change of temperature test, ≥ 100 cycles, should preferably be 1 000. NOTE 3 (ed)
The tests 4.19 (≥ 100 cycles), 4.27, 4.38 and 4.39 may be separated or grouped according to the individual suitable stability requirements.SIST EN 140402:2015
- 13 - EN 140402:2015
1.8 Non-linearity
No Provisions. NOTE
Measurement of non-linearity is generally not considered as a meaningful or significant test for wirewound resistors.
1.9 Tests related to soldering 1.9.1 Severities for solderability testing See EN 60115-8:2012, 2.3.2. 1.9.2 Severities for testing resistance to soldering heat See EN 60115-8:2012, 2.3.3. The solder bath method represents the soldering stress of all wave soldering and reflow soldering methods.
1.10 Marking, packaging and ordering designation NOTE (ed)
The marking of components and packaging shall be in accordance with the requirements of
EN 60115-1:2011, 2.4 and EN 60115-8:2012, 1.4.12 and 1.4.13. 1.10.1 Marking of the component SMD wirewound resistors are generally marked on the body. If some marking is applied to the body of resistors classified to Level P, the component shall be marked with the rated resistance using a letter and digit code according to EN 60062:2005, Clause 4, preferably the RKMG code system according to EN 60062:2005, 4.2.1. If possible, the tolerance shall be marked using the letter code of EN 60062:2005, 5.1. Resistor classified to Level R shall be marked with the rated resistance using the RKMG code system according to EN 60062:2005, 4.2.1, and with the tolerance using the letter code of EN 60062:2005, 5.1. Marking of the temperature coefficient and of any other item from the list given in EN 60115-1:2011, 2.4.1 shall be the choice of the manufacturer. 1.10.2 Packaging Components shall be taped according to EN 60286-3, type 2a. 1.10.3 Marking of the packaging The packaging of the component shall be marked with the ordering information in accordance to 1.10.4 and additionally with: – CECC or IECQ sign of conformity, – CECC or IECQ manufacturer code, – NATO manufacturer code (only Level R), – date code of manufacture according to EN 60062. Additional information is permissible. 1.10.4 Ordering information Orders for resistors covered by this specification shall contain the following information: – detail specification number; – assessment level; SIST EN 140402:2015
EN 140402:2015 - 14 -
– style; – temperature coefficient; – rated resistance; – tolerance on rated resistance; – failure rate level (only for Level R; “E0” for Level P); – form of delivery (in addition to the ordering information given in the schematic below). Schematic of the ordering information for resistors covered by this specification: Level P: EN140402–8xxEZRWxxxxMQ4K75FE0 Level R (with failure rate level): EN140402–8xxEZRWxxxxMQ4K75FE5 NOTE 1
Level P succeeds the former Version A, and Level R succeeds the former Version E. NOTE 2 (ed)
Provisions for the ordering information of Level R are required only if the drafted detail specification includes Level R. The elements used in this ordering information have the following meaning: EN140402–8xx Detail specification number EZ Assessment level RWxxxxM Style (see Table 1) Q Temperature coefficient according to EN 60062 (see Table 5) 4K75 Resistance value, RKMG code system according to EN 60062, 4 characters F Tolerance on rated resistance (see Table 3 or Table 4) E0; E5 Failure rate level according to EN 60115-1:2011, Table ZR.1 NOTE 3
The specific values for style, temperature coefficient, resistance, tolerance and failure rate level applied above have been used to exemplify the schematic and hence need to be replaced by the user’s relevant choices. The ordering information used for electronic order processing shall not contain any spaces. 1.11 Additional information (not for inspection purpose) NOTE (ed)
The detail specification may include information (which is not required to be verified by the inspection procedure) for the clarification of the detail specification. The information below should be given in the detail specification as a minimum. 1.11.1 Storage The permitted storage time is 20 years under the conditions of EN 60115-1:2011, 2.7. Solderability and resistance may be affected by storage. Therefore test of solderability and measurement of resistance are recommended before delivery if the storage time exceeds two years. 1.11.2 Mounting The resistors are suitable for mounting on alumina substrates, common printed boards and flexible foils. NOTE (ed)
The following paragraph applies if the maximum element temperature is specified above 155 °C. Temperatures next to the resistor resulting from use of the full specified dissipation and temperature range may exceed the specification limits of the substrate material and thus are likely to affect the reliability of the assembly. It may hence be required to select a suitable substrate material in order to maintain the reliability of the assembly. 1.11.3 Soldering process The resistors are suitable for all soldering methods according to EN 61760-1. SIS
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