oSIST prEN IEC 60115-2-20:2026
(Main)Fixed resistors for use in electronic equipment - Part 2-20: Blank detail specification: Low-power film resistors with leads for through-hole assembly on circuit boards (THT), for high-performance electronic equipment, classification level P, or for high-performance and high-reliable electronic equipment, classification level R
Fixed resistors for use in electronic equipment - Part 2-20: Blank detail specification: Low-power film resistors with leads for through-hole assembly on circuit boards (THT), for high-performance electronic equipment, classification level P, or for high-performance and high-reliable electronic equipment, classification level R
Résistances fixes utilisées dans les équipements électroniques - Partie 2-20: Spécification particulière-cadre: Résistance à broches à couche, à faible dissipation, pour assemblage par trous traversants sur cartes de circuit imprimé (THT), pour les équipements électroniques de haute performance (niveau de classification P) ou pour les équipements électroniques de haute performance et de haute fiabilité (niveau de classification R)
Fiksni upori za uporabo v elektronski opremi - 2-20. del: Neizpolnjena podrobna specifikacija - Tankoplastni upori nizke moči s priključki za montažo skozi prehodne luknje tiskanih vezij (THT) za visokozmogljivo elektronsko opremo, razvrstitvena raven P, ali za visokozmogljivo in zelo zanesljivo elektronsko opremo, razvrstitvena raven R
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2026
Fiksni upori za uporabo v elektronski opremi - 2-20. del: Neizpolnjena podrobna
specifikacija - Tankoplastni upori nizke moči s priključki za montažo skozi
prehodne luknje tiskanih vezij (THT) za visokozmogljivo elektronsko opremo,
razvrstitvena raven P, ali za visokozmogljivo in zelo zanesljivo elektronsko
opremo, razvrstitvena raven R
Fixed resistors for use in electronic equipment - Part 2-20: Blank detail specification:
Low-power film resistors with leads for through-hole assembly on circuit boards (THT),
for high-performance electronic equipment, classification level P, or for high-performance
and high-reliable electronic equipment, classification level R
Résistances fixes utilisées dans les équipements électroniques - Partie 2-20:
Spécification particulière-cadre: Résistance à broches à couche, à faible dissipation,
pour assemblage par trous traversants sur cartes de circuit imprimé (THT), pour les
équipements électroniques de haute performance (niveau de classification P) ou pour
les équipements électroniques de haute performance et de haute fiabilité (niveau de
classification R)
Ta slovenski standard je istoveten z: prEN IEC 60115-2-20:2025
ICS:
31.040.10 Fiksni upor Fixed resistors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
40/3266/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60115-2-20 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-12-05 2026-02-27
SUPERSEDES DOCUMENTS:
40/3216/CD, 40/3247/CC
IEC TC 40 : CAPACITORS AND RESISTORS FOR ELECTRONIC EQUIPMENT
SECRETARIAT: SECRETARY:
Netherlands Mr Ronald Drenthen
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Fixed resistors for use in electronic equipment - Part 2-20: Blank detail specification: Low-
power film resistors with leads for through-hole assembly on circuit boards (THT), for high-
performance electronic equipment, classification level P, or for high-performance and high-
reliable electronic equipment, classification level R
PROPOSED STABILITY DATE: 2033
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, o r any part of it,
for any other purpose without permission in writing from IEC.
IEC CDV 60115-2-20 © IEC 2025
1 CONTENTS
3 FOREWORD . 4
4 1 Scope . 9
5 2 Normative references . 10
6 3 Terms and definitions . 10
7 4 Characteristics and ratings . 11
8 4.1 General . 11
9 4.2 Dimensions . 11
10 4.3 Ratings . 13
11 4.4 Resistance range and tolerance on resistance . 15
12 5 Tests and test severities . 16
13 5.1 General . 16
14 5.2 Resistance . 17
15 5.3 Temperature coefficient of resistance . 17
16 5.4 Temperature rise . 17
17 5.5 Endurance at the rated temperature 70 °C . 17
18 5.6 Endurance at a maximum temperature: UCT . 17
19 5.7 Short-term overload . 17
20 5.8 Single-pulse high-voltage overload test . 18
21 5.9 Periodic-pulse high-voltage overload test . 18
22 5.10 Electrostatic discharge (ESD) test . 19
23 5.11 Visual examination . 19
24 5.12 Gauging of dimensions . 19
25 5.13 Detail dimensions . 19
26 5.14 Robustness of terminations . 20
27 5.15 Vibration . 20
28 5.16 Rapid change of temperature . 20
29 5.17 Rapid change of temperature, ≥ 100 cycles . 20
30 5.18 Climatic sequence . 20
31 5.19 Damp heat, steady state . 21
32 5.20 Solderability, with lead-free solder . 21
33 5.21 Solderability, with SnPb solder . 22
34 5.22 Resistance to soldering heat . 22
35 5.23 Solvent resistance . 22
36 5.24 Insulation resistance . 22
37 5.25 Voltage proof . 22
38 5.26 Flammability . 22
39 6 Performance requirements . 23
40 6.1 General . 23
41 6.2 Limits for change of resistance at tests . 23
42 6.3 Temperature coefficient of resistance . 25
43 6.4 Temperature rise . 25
44 6.5 Visual examination . 25
45 6.6 Solderability . 26
IEC CDV 60115-2-20 © IEC 2025
46 6.7 Insulation resistance . 26
47 6.8 Flammability . 27
48 6.9 Non-linearity . 27
49 7 Marking, packaging and ordering information . 28
50 7.1 Marking of the component . 28
51 7.2 Packaging . 28
52 7.3 Marking of the packaging . 28
53 7.4 Ordering information . 28
54 8 Additional information . 29
55 8.1 General . 29
56 8.2 Storage and transportation . 29
57 8.3 Substrate for assembly . 29
58 8.4 Soldering process . 29
59 8.5 Use of cleaning agents or solvents. 29
60 8.6 Coating or potting after assembly . 30
61 9 Quality assessment procedures . 30
62 9.1 General . 30
63 9.2 Qualification approval . 31
64 9.3 Maintenance of a qualification approval . 32
65 9.4 Sample size for assessment of a failure rate level . 33
66 Annex A (normative) Symbols and abbreviated terms . 46
67 A.1 Symbols . 46
68 A.2 Abbreviated terms . 48
69 Annex B (normative) Reference for visual examination . 49
70 Annex C (normative) Zero Ohm resistors (jumpers) . 50
71 C.1 General . 50
72 C.2 Characteristics and ratings . 50
73 C.3 Tests and test severities . 51
74 C.4 Performance requirements . 51
75 C.5 Marking, packaging and ordering information . 51
76 C.6 Additional information . 51
77 C.7 Quality assessment procedures . 52
78 C.8 Application notes . 52
79 Annex D (informative) Application note on … . 53
80 Bibliography . 54
82 Figure 1 – Outline and dimensions . 11
83 Figure 2 – Lead eccentricity of the wire terminations . 13
84 Figure 3 – Length of excessive coating on the wire terminations . 13
85 Figure 4 – Derating curve . 14
rd
86 Figure 5 – 3 harmonic ratio requirement A . 27
3 min
88 Table 1 – Styles and dimensions . 12
89 Table 2 – Climatic categories . 13
90 Table 3 – Ratings . 14
IEC CDV 60115-2-20 © IEC 2025
91 Table 4 – Temperature coefficients, tolerances and resistance ranges for climatic
92 category . / . / . . 15
93 Table 5 – Temperature coefficients, tolerances and resistance ranges of products
94 classified to level R, for climatic category . / . / . . 16
95 Table 6 – Short-term overload duration . 18
96 Table 7 – Pulse voltage factors for the single-pulse high-voltage overload test . 18
97 Table 8 – Pulse voltage factors for the periodic-pulse high-voltage overload test . 19
98 Table 9 – ESD test voltages . 19
99 Table 10 – Number of temperature cycles of the rapid change of temperature test . 20
100 Table 11 – Additional cycles of the damp heat, cyclic test . 21
101 Table 12 – Damp heat, steady state test duration . 21
102 Table 13 – Limits for change of resistance at tests. 24
103 Table 14 – Permitted change of resistance due to the variation of temperature . 25
104 Table 15 – Required sample size for qualification of a failure rate level . 33
105 Table 16 – Sample size for maintenance of a failure rate level based on a 60 %
106 statistical confidence level . 34
107 Table 17 – Sample size for maintenance of a failure rate level based on a 10 %
108 statistical confidence level . 34
109 Table 18 – Test schedule for the qualification approval . 35
110 Table 19 – Test schedule for quality conformance inspection . 40
111 Table C.1 – Climatic category . 50
112 Table C.2 – Ratings for 0 Ω resistors . 50
IEC CDV 60115-2-20 © IEC 2025
115 INTERNATIONAL ELECTROTECHNICAL COMMISSION
116 ____________
118 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –
120 Part 2-20: Blank detail specification: Low-power film resistors with leads
121 for through-hole assembly on circuit boards (THT),
122 for high-performance electronic equipment, classification level P,
123 or for high-performance and high-reliable electronic equipment,
124 classification level R
126 FOREWORD
127 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
128 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
129 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
130 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
131 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
132 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
133 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
134 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
135 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
136 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
137 consensus of opinion on the relevant subjects since each technical committee has representation from all
138 interested IEC National Committees.
139 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
140 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
141 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
142 misinterpretation by any end user.
143 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
144 transparently to the maximum extent possible in their national and regional publications. Any divergence between
145 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
146 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
147 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
148 services carried out by independent certification bodies.
149 6) All users should ensure that they have the latest edition of this publication.
150 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
151 members of its technical committees and IEC National Committees for any personal injury, property damage or
152 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
153 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
154 Publications.
155 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
156 indispensable for the correct application of this publication.
157 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
158 rights. IEC shall not be held responsible for identifying any or all such patent rights.
159 IEC 60115‑2‑20 has been prepared by IEC technical committee 40: Capacitors and resistors
160 for electronic equipment. It is an International Standard.
161 The text of this International Standard is based on the following documents:
Draft Report on voting
40/XX/FDIS 40/XX/RVD
163 Full information on the voting for its approval can be found in the report on voting indicated in
164 the above table.
IEC CDV 60115-2-20 © IEC 2025
165 The language used for the development of this International Standard is English.
166 A list of all parts in the IEC 60115 series, published under the general title Fixed resistors for
167 use in electronic equipment, can be found on the IEC website.
168 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
169 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
170 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
171 described in greater detail at www.iec.ch/publications.
172 The committee has decided that the contents of this document will remain unchanged until the
173 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
174 specific document. At this date, the document will be
175 • reconfirmed,
176 • withdrawn,
177 • replaced by a revised edition, or
178 • amended.
IEC CDV 60115-2-20 © IEC 2025
182 0 Introduction to the template provided by this blank detail specification
183 COMMENT This introduction is not intended to be copied into the drafted detail specification. Therefore, it is
184 positioned in front of the conventional document structure and clause numbering range. It nevertheless contains
185 normative requirements to the drafted detail specification.
186 0.1 Scope of this blank detail specification
187 This part of IEC 60115‑2 is applicable to the drafting of detail specifications for low-power film
188 resistors with leads, classified to level P or to level R, based on the definition of the product
189 classification levels in IEC 60115‑1:2020, 3.4.
190 Another part of IEC 60115‑2 provides a separate blank detail specification for the drafting of
191 detail specifications for low-power film resistors with leads, classified to level G.
192 Yet other parts of IEC 60115‑2 may be issued to provide blank detail specifications for the
193 drafting of detail specifications for low-power film resistors with leads, of other technologies or
194 of other classification levels.
195 0.2 Function of this blank detail specification
196 A blank detail specification is a supplementary document to the sectional specification and
197 contains requirements for style, layout and minimum contents of detail specifications. Detail
198 specifications not complying with these requirements shall not be accepted as being in
199 accordance with IEC specifications nor shall they be described as such.
200 Detail specifications complying with the requirements of this blank detail specification are a
201 legitimate basis for the quality assessment of leaded fixed low-power film resistors under an
202 adequate quality assessment system, e.g. the IEC Quality Assessment System for Electronic
203 Components (IECQ System), whereas the plain blank detail specification is not a suitable basis.
204 The detail specification should contain a table of contents prior the first page of the actual
205 specification.
206 In the preparation of the detail specification, the content of IEC 60115‑2:2023, 8.2 shall be
207 taken into account. The detail specification should be written by using the preferred values
208 given in IEC 60115‑2.
209 Units, graphical symbols and letter symbols shall, whenever possible, be taken from those
210 prescribed by the following standards:
211 – IEC 60027-1, Letter symbols to be used in electrical technology – Part 1: General
212 – IEC 60617, Graphical symbols for diagrams
213 – IEC 80000 (all parts), Quantities and units
214 – ISO 80000 (all parts), Quantities and units
215 This blank detail specification uses for its purpose two different kinds of notes:
216 – NOTE For notes which give additional information intended to assist the
217 understanding or use of the resulting document and therefore shall be copied
218 as NOTE into the drafted detail specification. As outlined in the ISO/IEC
219 directives, these notes shall not contain any requirement, instruction,
220 recommendation or permission.
IEC CDV 60115-2-20 © IEC 2025
221 – COMMENT For editorial notes which are intended to aid and direct the specification
222 writer and therefore shall not be copied into the drafted detail specification.
223 In order to accomplish their function, editorial notes require the use of
224 instructions, recommendations and permissions addressed to the writer of
225 the detail specification.
226 0.3 Identification of the detail specification and the resistor
227 The first page of the detail specification should have a layout starting with a title block as
228 recommended on the following page.
229 The numbers in square brackets are editorial references, which are not intended to be copied
230 into the drafted detail specification, and which correspond to the following information on the
231 contents which shall be inserted in the indicated fields.
232 [1] The name of the standardisation organisation under whose authority the detail specification
233 is published and, if applicable, the organization from whom the detail specification is
234 available.
235 [2] The number allocated to the detail specification by the IEC or by the responsible
236 standardisation organisation, together with the date of issue and issue number, as
237 applicable. Further reference details required by the responsible standardisation
238 organisation or quality assessment system may be given here, including an established
239 mark of conformity, as applicable.
240 [3] The number and issue date and number, as applicable, of the relevant generic specification,
241 sectional specification and blank detail specification, where the referenced issues shall be
242 the most recent issues of the respective specifications.
243 [4] The title of the detail specification, providing a short description of the type of resistors.
244 This entry should support the discrimination between similar specifications and should be
245 suitable for an entry in a register of approvals or in a catalogue of standards. It may duplicate
246 information given in fields [6] and [7] and in the textual scope in Clause 1.
247 [5] An outline drawing or illustration of the products. This entry should aid the easy recognition
248 of the specified resistors and, if possible, support the discrimination between similar
249 specifications. It may duplicate information given in Figure 1.
250 [6] Information on the typical construction of the resistors (where applicable), information of the
251 specified resistors being insulated or non-insulated (see IEC 60115-1:2020, 3.1.7), and
252 information on compatibility with a specific soldering process (if applicable, see 8.4). This
253 entry may duplicate information given in the textual scope in Clause 1.
254 [7] The classification level of the resistors covered by this detail specification, the level of
255 quality assessment (Assessment level EZ), and the general level of stability requirements
256 at performance tests (Stability class).
257 This information may duplicate information given in the textual scope in Clause 1.
258 [8] Optional field for table notes.
259 [9] Statement(s) about the availability of information on components qualified to this detail
260 specification, if applied within a full quality assessment system.
261 Example for the use within the IECQ system:
262 Information about components qualified to this detail specification is available in the
263 approvals section of the website http://www.iecq.org.
IEC CDV 60115-2-20 © IEC 2025
Specification available from: IEC 60115-2-20xx:20yy
[1] [2]
Electronic components of assessed quality in accordance with:
Generic specification: IEC 60115-1:2020 [3]
Sectional specification: IEC 60115-2:2023
Blank detail specification: IEC 60115-2-20:202x
FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –
Part 2-20xx: Detail specification – Low-power film resistors with leads
for through-hole assembly on circuit boards (THT),
…,
for high-performance electronic equipment, classification level P,
or for high-performance and high-reliable electronic equipment,
classification level R
[4]
Technology …
[6]
Insulated / Non-insulated
Termination plating ,,,.
[5]
Product classification level P;
Product classification level R with
assessed failure rate level
Assessment level EZ [7]
Stability classes .
[8]
266 COMMENT The remainder of this page is intentionally left empty in order to start Clause 1 on top of the next page.
Information about components qualified to this detail specification is available ….
[9]
IEC CDV 60115-2-20 © IEC 2025
269 FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –
271 Part 2-20: Detail specification: Low-power film resistors with leads
272 for through-hole assembly on circuit boards (THT),
273 …,
274 for high-performance electronic equipment, classification level P,
275 or for high-performance and high-reliable electronic equipment,
276 classification level R
279 COMMENT The above title without the introductory word “blank” is to become the title of the intended detail
280 specification, which is drafted on the basis of this blank detail specification.
281 The actual title of the intended detail specification should hold some wording descriptive for the particular kind of
282 components covered therein, where indicated by “…”, in order to support the differentiation between parallel detail
283 specification on the same level. An example for such descriptive wording would be: “stability classes 0,1; 0,25”.
284 The statement on the applied classification level(s) should be modified as required by the intended detail
285 specification.
286 1 Scope
287 COMMENT The text of this clause may repeat information already given in some fields of the above title block.
288 Essential information on the special type of components covered by the drafted detail specification may be added,
289 preferably at the place marked with "…".
290 This detail specification specifies the characteristics and ratings of low-power film resistors with
291 leads for use in electronic equipment, which are typically assembled in through-hole technology
292 (THT) on circuit boards.
293 .
294 The resistors covered herein are classified to level P only, or to level R, which includes level P.
295 Classification level P is defined in IEC 60115-1:2020, 3.4 for high-performance electronic
296 equipment, typically operated under harsh environmental conditions, typically built for an
297 extended lifetime, where uninterrupted performance is desired or mandatory. Examples for level
298 P include professional equipment, telecommunication transmission systems, industrial control
299 and measurement systems and most automotive applications operated outside the passenger
300 compartment.
301 Classification level R is defined in IEC 60115-1:2020, 3.4 for high-performance and high-
302 reliable electronic equipment, with the same operating conditions and requirements as given
303 for level P, with the additional requirement for established reliability and a formally assessed
304 failure rate level. Examples for Level R include military and defense equipment, avionics and
305 aerospace applications.
306 This detail specification is based upon the blank detail specification IEC 60115-2-20:202X.
307 This detail specification establishes test schedules and performance requirements permitting
308 the quality assessment of the resistors covered herein according to the quality assessment
309 procedures prescribed by IEC 60115-1:2020, Annex Q.
IEC CDV 60115-2-20 © IEC 2025
310 2 Normative references
311 The following documents are referred to in the text in such a way that some or all of their content
312 constitutes requirements of this document. For dated references, only the edition cited applies.
313 For undated references, the latest edition of the referenced document (including any
314 amendments) applies.
315 IEC 60062, Marking codes for resistors and capacitors
316 IEC 60063, Preferred number series for resistors and capacitors
317 IEC 60115-1:2020, Fixed resistors for use in electronic equipment – Part 1: Generic
318 specification
319 IEC 60115-2:2023, Fixed resistors for use in electronic equipment – Part 2: Sectional
320 specification – Low-power film resistors with leads for through-hole assembly on circuit boards
321 (THT)
322 IEC 60115-2-20:202x, Fixed resistors for use in electronic equipment – Part 2-20: Blank detail
323 specification –Low-power film resistors with leads for through-hole assembly on circuit boards
324 (THT), for high-performance and high-reliable electronic equipment, classification levels P and
325 R
326 IEC 60286-1, Packaging of components for automatic handling – Part 1: Tape packaging of
327 components with axial leads on continuous tapes
328 IEC 60294, Measurement of the dimensions of a cylindrical component with axial terminations
329 IEC 60301, Preferred diameters of wire terminations of capacitors and resistors
330 IEC 61760-1, Surface mounting technology – Part 1: Standard method for the specification of
331 surface mounting components (SMDs)
332 IEC 61193-2:2007, Quality assessment systems – Part 2: Selection and use of sampling plans
333 for inspection of electronic components and packages
334 .
335 COMMENT 1 The above list of normative references provides an example and needs to be adapted to the actual
336 requirements of the drafted detail specification, indicated by the space marked with "…", which however does not
337 preclude from sorting in proper numerical order.
338 COMMENT 2 According to the ISO/IEC directives, dated references are required when reference is made to a
339 specific part of the referenced standard and generally should be applied only in such cases.
340 COMMENT 3 It is recommended to update any dated references to the most recent revision of the referenced
341 standard when drafting a detail specification. This involves updating of the dated normative references within the
342 text of the drafted detail specification.
343 3 Terms and definitions
344 For the purposes of this document, the terms and definitions given in IEC 60115-1 and in
345 IEC 60115-2, as well as the following, apply.
347 …
IEC CDV 60115-2-20 © IEC 2025
348 COMMENT Any terms and their respective definitions specifically required for the scope of the drafted detail
349 specification may be inserted in the space marked with "…", using the prescribed numbering and format. Otherwise,
350 the above statement should be reduced to "For the purposes of this document, the terms and definitions given in
351 IEC 60115-1 and in IEC 60115-2 apply." if no further terms or definitions are required in the drafted detail
352 specification.
353 ISO and IEC maintain terminology databases for use in standardization at the following
354 addresses:
355 • IEC Electropedia: available at https://www.electropedia.org/
356 • ISO Online browsing platform: available at https://www.iso.org/obp
357 4 Characteristics and ratings
358 4.1 General
359 Various parameters of this component are precisely defined in this specification. Unspecified
360 parameters can vary from one component to another.
361 4.2 Dimensions
362 The shape and dimensions of the resistors covered by this specification are shown in Figure 1,
363 with the specific styles and their respective dimensions given in Table 1. Other shapes are
364 permissible within the given dimensions.
366 Figure 1 – Outline and dimensions
367 COMMENT 1 See IEC 60115-2:2023, 8.2.1.
368 COMMENT 2 The details shown in Figure 1 may repeat information already given in some fields of the title block
369 above. Figure 1 in particular needs to define all dimensions intended to be verified by measurements, which generally
370 includes those dimensions to be prescribed in Table 1.
IEC CDV 60115-2-20 © IEC 2025
371 Table 1 – Styles and dimensions
f
Style Dimensions
Mass
a b c d e
Metric Y m
X D L d l
min
mm mm mm mm mg
a
Historical style code, for information only.
b
The body diameter of the resistor D shall be gauged as prescribed in IEC 60294 (see IEC 60115-2:2023,
5.3.11).
c
The body length of the resistor L shall be gauged and measured in accordance with IEC 60294 (see IEC
60115‑2:2023, 5.3.11 and 5.3.12).
d
Nominal diameter of the lead wires d, with permissible tolerances in accordance with IEC 60301.
e
The minimum lead length l for products in tape packaging in accordance with IEC 60286-1 applies to the
min
length of the free sections of lead wire between the resistor body and each tape. For untaped resistors , it
applies to the length of each lead wire.
f
For information only.
373 COMMENT 3 See IEC 60115-2:2023, 8.2.2.
374 COMMENT 4 The metric style designation is the normative designation used in all other places throughout this
375 detail specification, see IEC 60115-2:2023, 4.2.1. Column X is an optional column for additional style information,
376 e.g. for traditional alphabetic designations, which generally need to be marked with a respective footnote, e.g. as
377 "Historical style code, for information only".
378 COMMENT 5 The dimensions for body diameter D, body length L, lead wire diameter d and minimum free lead
379 length l are given as examples based on the requirements for axial leaded resistors with cylindrical bodies and
min
380 need to correspond to the dimensions identified in Figure 1. The choice of prescribed dimensions needs to be adapted
381 to the actual requirements of the drafted detail specification and the shape of products covered therein. The
382 dimensions may be given in the format of nominal values plus tolerance, or by stating permissible minimum and
383 maximum values. Columns for additional dimensions may be inserted as required.
384 COMMENT 6 Column Y represents one or more optional column(s) for the prescription of an additional dimension,
385 e.g. the permissible lead eccentricity and/or the permissible length of excessive coating on the leads, as required.
386 COMMENT 7 The prescribed minimum lead length should take account of the variety of inside tape spacing
387 prescribed as dimension B by IEC 60286-1, plus the permissible window for the lateral resistor body location, given
388 there as dimension K.
389 COMMENT 8 The component mass is not intended to be verified by an inspection procedure. It should be given as
390 the maximum mass of a single component and should be marked with a respective footnote as "For information only".
391 The wire terminations of the resistor shall emerge concentrically from the end faces of the
392 resistor body; see IEC 60115‑2:2023, 4.2.4 with IEC 60115‑2:2023, Figure 6. The real
393 eccentricity e, as shown in below Figure 2, shall not exceed the limit given in Table 1. For
394 gauging of the lead eccentricity, the effective eccentricity e’ should be used; see
395 IEC 60115‑2:2023, 4.2.4.
IEC CDV 60115-2-20 © IEC 2025
397 Figure 2 – Lead eccentricity of the wire terminations
398 COMMENT 9 The above paragraph and figure are optional and given as an example for the specification of a
399 permissible lead eccentricity. If this specification is used in the drafted detail specification, a suitable method for
400 gauging and/or measuring of the lead eccentricity needs to be described, e.g. in the respective subclauses of
401 Clause 5. Alternatively, the deletion of this paragraph and figure will result in the need to update the numbering of
402 subsequent figures accordingly.
403 The resistor shall be properly coated in order to provide a suitable protection against
404 mechanical, electrical and climatic influences, e.g. by means of a conformal lacquer coating. It
405 is typical for such coating to also cover the end faces of the resistor body, which can lead for
406 some amount of excessive coating to spread onto the leads; see IEC 60115‑2:2023, 4.2.2 with
407 IEC 60115‑2:2023, Figure 4. The length of excessive coating c, as shown in below Figure 3,
408 shall not exceed the limit given in Table 1.
410 Figure 3 – Length of excessive coating on the wire terminations
411 COMMENT 10 The above paragraph and figure are optional and given as an example for the specification of a
412 permissible length of excessive coating on the wire terminations. If this specification is used in the drafted detail
413 specification, a suitable method for gauging and/or measuring of the length of excessive coating needs to be
414 described, e.g. in the respective subclauses of Clause 5. Alternatively, the deletion of this paragraph and figure will
415 result in the need to update the numbering of subsequent figures accordingly.
416 4.3 Ratings
417 The climatic categories applied in this detail specification are given in Table 2.
418 Table 2 – Climatic categories
Climatic category
LCT / UCT / duration
... / ... / ...
... / ... / ...
420 COMMENT 1 See IEC 60115-2:2023, 8.2.3.
421 COMMENT 2 Table 2 may be amended with a column showing the key parameter to which different climatic
422 categories are allocated for the purpose of discrimination, e.g. the applied stability classes.
423 The upper category temperature (UCT), which is used for test procedures, should be based on
424 the maximum element temperature (MET).
IEC CDV 60115-2-20 © IEC 2025
425 Table 3 – Ratings
Rated Limiting element voltage Insulation voltage
Style X
dissipation DC or AC r.m.s. DC or AC peak
P U U
70 max ins
mW V V
NOTE For insulated resistors, the insulation voltage U is verified with a test duration of one minute. However,
ins
long-term insulation properties can be affected by the influence of moisture, organic material and electrical field
across the insulating layer(s).
426 COMMENT 3 See IEC 60115-2:2023, 8.2.6, IEC 60115-2:2
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.