prEN IEC 62674-1:2024
(Main)High frequency inductive components - Part 1: Fixed surface mount inductors for use in electronic and telecommunication equipment
High frequency inductive components - Part 1: Fixed surface mount inductors for use in electronic and telecommunication equipment
Induktive Hochfrequenzbauelemente - Teil 1: Oberflächenmontierbare Festinduktivität für den Einsatz in Elektronik und Telekommunikationsgeräten
Composants inductifs à haute fréquence - Partie 1: Bobines d'inductance fixes à montage en surface utilisées dans les matériels électroniques et les équipements de télécommunications
Visokofrekvenčni induktivni sestavni deli - 1. del: Fiksne dušilke za površinsko montažo za elektronsko in telekomunikacijsko opremo
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Visokofrekvenčni induktivni sestavni deli - 1. del: Fiksne dušilke za površinsko
montažo za elektronsko in telekomunikacijsko opremo
High frequency inductive components - Part 1: Fixed surface mount inductors for use in
electronic and telecommunication equipment
Induktive Hochfrequenzbauelemente - Teil 1: Oberflächenmontierbare Festinduktivität für
den Einsatz in Elektronik und Telekommunikationsgeräten
Composants inductifs à haute fréquence - Partie 1: Bobines d'inductance fixes à
montage en surface utilisées dans les matériels électroniques et les équipements de
télécommunications
Ta slovenski standard je istoveten z: prEN IEC 62674-1:2024
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
51/1505/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62674-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-06-21 2024-09-13
SUPERSEDES DOCUMENTS:
51/1453/CD, 51/1464A/CC
IEC TC 51 : MAGNETIC COMPONENTS, FERRITE AND MAGNETIC POWDER MATERIALS
SECRETARIAT: SECRETARY:
Japan Mr Naoki Kawakubo
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
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CENELEC, is drawn to the fact that this Committee Draft for
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The CENELEC members are invited to vote through the
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submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
High frequency inductive components - Part 1: Fixed surface mount inductors for use in electronic and
telecommunication equipment
PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
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, or any part of it, for any other purpose without
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IEC CDV 62674-1 © IEC 2024 – 2 – 51/1505/CDV
1 CONTENTS
2 FOREWORD . 4
3 1 Scope . 6
4 2 Normative references . 6
5 3 Terms and definitions . 7
6 4 Designation . 7
7 5 Shape . 9
8 6 Dimensions . 10
9 6.1 Shape D . 10
10 6.2 Shape K . 11
11 6.3 Tolerance for outline dimensions . 11
12 7 Ratings and characteristics. 12
13 7.1 Nominal inductance or impedance . 12
14 7.2 Tolerance for nominal inductance or impedance . 12
15 7.3 Operating temperature range . 12
16 8 Marking . 13
17 9 Direction marking or shape of polarity. 13
18 10 Tests and performance requirements . 14
19 10.1 Standard atmospheric conditions for testing . 14
20 10.1.1 Standard atmospheric conditions for measurements and tests . 14
21 10.1.2 Referee condition . 14
22 10.2 Visual examination and check of dimensions . 14
23 10.2.1 Visual examination . 14
24 10.2.2 Dimensions. 14
25 10.3 Electrical performance tests . 15
26 10.3.1 Inductance . 15
27 10.3.2 Q . 18
28 10.3.3 Impedance . 23
29 10.3.4 Self-resonant frequency . 23
30 10.3.5 DC resistance . 25
31 10.3.6 Rated current . 26
32 10.4 Mechanical performance tests . 26
33 10.4.1 Mounting to substrate . 26
34 10.4.2 Body strength test . 26
35 10.4.3 Robustness of terminations (electrodes) . 27
36 10.4.4 Solderability . 27
37 10.4.5 Resistance to soldering heat. 27
38 10.4.6 Resistance to dissolution of metallization . 28
39 10.4.7 Vibration . 28
40 10.4.8 Resistance to shock . 28
41 10.5 Environmental and climatic tests . 29
42 10.5.1 Cold . 29
43 10.5.2 Dry heat . 30
44 10.5.3 Change of temperature . 30
45 10.5.4 Damp heat (steady state) . 31
46 10.5.5 Component solvent resistance . 32
51/1505/CDV – 3 – IEC CDV 62674-1 © IEC 2024
47 Bibliography . 33
49 Figure 1 – Shapes of inductor and ferrite beads (examples) . 9
50 Figure 2 – Example of circuit for measurement by the bridge method . 15
51 Figure 3 – Example of circuit for measurement by the vector voltage/current method . 16
52 Figure 4 – Example of a circuit for measurement by the automatic balancing bridge
53 method . 17
54 Figure 5 – Example of circuit for measurement by the series resonance method . 20
55 Figure 6 – Example of a circuit for measurement by the parallel resonance method . 21
56 Figure 7 – Tuning characteristics of inductor . 22
57 Figure 8 – Example of circuit for measurement by the minimum output method . 24
58 Figure 9 – Example of measuring circuit for DC resistance . 25
60 Table 1 – Letter code for inductance value . 8
61 Table 2 – Dimensions for shape D . 10
62 Table 3 – Dimensions of height for shape D (R 20 series) . 10
63 Table 4 – Dimensions of height for shape D less than 1,00 mm . 11
64 Table 5 – Dimensions for shape K . 11
65 Table 6 – Tolerance for outline dimension and height . 11
66 Table 7 – E 24 series for nominal inductance or impedance . 12
67 Table 8 – Tolerance for nominal inductance or impedance . 12
68 Table 9 – Temperatures to be selected for operating temperature ranges . 12
69 Table 10 – User reference / Examples of application and operating temperature range . 13
70 Table 11 – Electrical performance . 28
71 Table 12 – Combined test conditions for cold . 29
72 Table 13 – Combined test conditions for dry heat. 30
73 Table 14 – Test conditions for change of temperature . 31
74 Table 15 – Test conditions for damp heat (steady state) . 31
IEC CDV 62674-1 © IEC 2024 – 4 – 51/1505/CDV
77 INTERNATIONAL ELECTROTECHNICAL COMMISSION
78 ____________
80 HIGH FREQUENCY INDUCTIVE COMPONENTS –
82 Part 1: Fixed surface mount inductors for use in electronic
83 and telecommunication equipment
86 FOREWORD
87 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
88 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
89 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
90 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
91 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
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96 agreement between the two organizations.
97 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
98 consensus of opinion on the relevant subjects since each technical committee has representation from all
99 interested IEC National Committees.
100 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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116 Publications.
117 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
118 indispensable for the correct application of this publication.
119 9) IEC draws attention to the possibility that the implementation of this document may involve the use of a patent.
120 IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
121 thereof. As of the date of publication of this document, IEC had not received notice of a patent, which may be
122 required to implement this document. However, implementers are cautioned that this may not represent the
123 latest information, which may be obtained from the patent database available at https://patents.iec.ch and/or
124 www.iso.org/patents. IEC shall not be held responsible for identifying any or all such patent rights.
125 IEC 62674-1 has been prepared by IEC technical committee 51: Magnetic components, ferrite
126 and magnetic powder materials. It is an international standard.
127 This second edition cancels and replaces the first edition published in 2012. This edition
128 constitutes a technical revision.
129 This edition includes the following significant technical changes with respect to the previous
130 edition:
131 a) addition of dimensions for shape D.
132 b) addition of upper temperature for operating temperature ranges.
51/1505/CDV – 5 – IEC CDV 62674-1 © IEC 2024
135 The text of this international standard is based on the following documents:
FDIS Report on voting
51/xxxx/FDIS 51/xxxx/RVD
137 Full information on the voting for the approval can be found in the report on voting indicated in
138 the above table.
139 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
140 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement available
141 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
142 described in greater detail at www.iec.ch/publications.
143 The committee has decided that the contents of this publication will remain unchanged until
144 the stability date indicated on the IEC website under webstore.iec.ch in the data related to the
145 specific publication. At this date, the publication will be
146 • reconfirmed,
147 • withdrawn,
148 • replaced by a revised edition, or
149 • amended.
IEC CDV 62674-1 © IEC 2024 – 6 – 51/1505/CDV
152 HIGH FREQUENCY INDUCTIVE COMPONENTS –
154 Part 1: Fixed surface mount inductors for use in electronic
155 and telecommunication equipment
158 1 Scope
159 This part of IEC 62674 applies to fixed surface mount inductors and fixed surface mount
160 ferrite beads.
161 The object of this standard is to define the terms necessary to describe the inductors covered
162 by this standard, provide recommendations for preferred characteristics, recommended
163 performance, test methods and general guidance.
164 2 Normative references
165 The following documents, in whole or in part, are normatively referenced in this document and
166 are indispensable for its application. For dated references, only the edition cited applies. For
167 undated references, the latest edition of the referenced document (including any
168 amendments) applies.
169 IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
170 IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
171 IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
172 IEC 60068-2-14:2009, Environmental testing – Part 2-14: Tests – Test N: Change of
173 temperature
174 IEC 60068-2-45, Basic environmental testing procedures – Part 2-45: Tests – Test XA and
175 guidance: Immersion in cleaning solvents
176 IEC 60068-2-58:2015, Environmental testing – Part 2-58: Tests – Test Td: Test methods for
177 solderability, resistance to dissolution of metallization and to soldering heat of surface
178 mounting devices (SMD)
179 IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
180 state
181 IEC 61605:2016, Fixed inductors for use in electronic and telecommunication equipment –
182 Marking codes
183 IEC 62024-1:2017, High frequency inductive components – Electrical characteristics and
184 measuring methods – Part 1: Nanohenry range chip inductor
185 IEC 62024-2:2020, High frequency inductive components – Electrical characteristics and
186 measuring methods – Part 2: Rated current of inductors for DC to DC converters
187 IEC 62025-2:2019, High frequency inductive components – Non-electrical characteristics and
188 measuring methods – Part 2: Test methods for non-electrical characteristics
189 IEC 62211:2017, Inductive components – Reliability management
51/1505/CDV – 7 – IEC CDV 62674-1 © IEC 2024
190 ISO 3:1973, Preferred numbers – Series of preferred numbers
191 ISO 3599, Vernier callipers reading to 0,1 and 0,05 mm
192 ISO 3611, Geometrical product specifications (GPS) – Dimensional measuring equipment:
193 Micrometers for external measurements – Design and metrological characteristics
194 ISO 6906, Vernier callipers reading to 0,02 mm
195 3 Terms and definitions
196 For the purposes of this document, the following terms and definitions apply.
197 ISO and IEC maintain terminology databases for use in standardization at the following
198 addresses:
199 • IEC Electropedia: available at https://www.electropedia.org/
200 • ISO Online browsing platform: available at https://www.iso.org/obp
201 3.1
202 rated current
203 maximum current which may be loaded continuously by inductors at the rated ambient
204 temperature
205 Note 1 to entry: A DC saturation limited current value or a temperature rise limited current value, whichever is
206 less, has been adopted as the rated current (see IEC 62024-2:2020, Clause 7).
207 3.2
208 operating temperature range
209 category temperature range
210 range of ambient temperatures for which the inductor has been designed to operate
211 continuously
212 Note 1 to entry: Unless otherwise specified in the detail specification, the operating temperature is ambient
213 temperature plus temperature rise of components.
214 4 Designation
215 It is recommended to express the designation of the fixed surface mount inductors by the
216 following 12 digits format. In the case of another format, designation shall be specified in the
217 detail specifications.
218 The designation of ferrite beads shall be specified in the detail specifications.
219 □□□ □□□□ □ □□□ □
a) b) c) d) e)
220 a) Identification of the type of inductor
221 Fixed surface mount inductors shall be identified by the three alphabetic characters ‘LCL’.
222 b) Indication of outline dimensions
223 The outline dimensions of the surface mount inductor shall be indicated by a four-digit
224 number based on two significant figures for each dimension of L and W (or H). As for the
225 dimensions of shape D, the first two digits indicate the longer side dimension L, and the
226 last two digits indicate the shorter side dimension W, as shown in Figure 1. As for the
IEC CDV 62674-1 © IEC 2024 – 8 – 51/1505/CDV
227 dimensions of shape K, the first two digits indicate the outline dimension L, and the last
228 two digits indicate the height dimension H.
229 c) Indication of shape
230 A single alphabetic character as given in Figure 1 indicates the shape for fixed surface
231 mount inductors.
232 The shape codes are classified by the base shape of inductors.
233 D: rectangular
234 K: square
235 d) Indication of nominal inductance
236 Three alphanumeric characters specified in IEC 61605:2016, Table 3, indicate the nominal
237 inductance value (see Table 1). Except letter code of IEC61605, it shall be specified
238 between parties concerned.
239 Table 1 – Letter code for inductance value
Inductance values Digit and letter code
0,1 nH N10
0,47 nH N47
1 nH 1N0
4,7 nH 4N7
10 nH 10N
47 nH 47N
0,1 µH R10
0,47 µH R47
1 µH 1R0
4,7 µH 4R7
10 µH 100
47 µH 470
100 µH 101
470 µH 471
1 mH 102
4,7 mH 472
10 mH 103
47 mH 473
100 mH 104
470 mH 474
1 H 105
4,7 H 475
10 H 106
47 H 476
51/1505/CDV – 9 – IEC CDV 62674-1 © IEC 2024
240 e) Indication of tolerance for inductance
241 Single alphabetic characters specified in Table 8 indicate the tolerance for the inductance
242 value.
243 5 Shape
244 The shapes of fixed surface mount inductors and ferrite beads are classified as shown in
245 Figure 1.
H
H
H
L
L
L
W
W
W
H
L
W
IEC 1855/12
Shape D
H
H
L
259 L
L
L
L
H
H
L
L
L
Shape K
IEC 1856/12
266 Figure 1 – Shapes of inductor and ferrite beads (examples)
IEC CDV 62674-1 © IEC 2024 – 10 – 51/1505/CDV
267 6 Dimensions
268 6.1 Shape D
269 For the dimensions for shape D, see a) and b).
270 a) Outline dimensions L (long side) and W (short side) of shape D shall be chosen from the
271 values marked with x in Table 2. These values have been selected from the R 20 series of
272 ISO 3:1973, but the values 0,315, 0,56 and 3,15 have been rounded off to 0,3, 0,6 and 3,2
273 respectively. 1,25 may be rounded off to 1,2. Dimension L, which is more than 8mm, and
274 dimension W, which is more than 7.1mm, shall be specified between parties concerned
275 b) Dimensions of height greater than 1,00 mm shall be chosen from Table 3. These values
276 are taken from the R 20 series of ISO 3:1973 where, however, the values 1,12, 2,24, 3,15
277 and 3,55 have been rounded off to 1,1, 1,2, 3,2 and 3,6 respectively. 1,25 may be rounded
278 off to 1,2. Dimensions of height, less than 1,00 mm, shall be selected from Table 4.
279 Dimension H, which is more than 10mm, shall be specified between parties concerned
280 Table 2 – Dimensions for shape D
W
(short side)
L
(long
mm
side)
0,1
1,25
mm
0,2 0,3 0,4 0,5 0,8 1,0 1,6 1,8 2,0 2,5 3,2 4,0 5,0 5,6 6,3 7,1
(0,125) (1,2)
0,2 X
(0,25)
0,4 X
0,6 X
0,8 X
1,0 X
1,2 X
1,6 X X
2,0 X X X
2,5 X X
3,2 X X X
4,0
4,5 X X X
5,0 X
5,6 X
6,3 X
7,1 X
8,0 X
282 Table 3 – Dimensions of height for shape D (R 20 series)
283 Dimensions in millimetres
1,25
1,0 1,1 1,4 1,6 1,8 2,0 2,2 2,5 2,8 3,2
(1,2)
3,6 4,0 4,5 5,0 5,6 6,3 7,1 8,0 9,0 10,0
51/1505/CDV – 11 – IEC CDV 62674-1 © IEC 2024
285 Table 4 – Dimensions of height for shape D less than 1,00 mm
0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,85 0,9
287 6.2 Shape K
288 Outline dimensions L and H of shape K shall be chosen from the values marked with x in
289 Table 5. These values are based on the R 20 series of ISO 3:1973. Dimension L, which is
290 more than 12mm, and Dimension H, which is more than 9mm, shall be specified between
291 parties concerned
292 Table 5 – Dimensions for shape K
H
L
(height)
(length)
mm
mm
0,6 0,8 0,9 1,0 1,1 1,2 1,4 1,6 1,8 2,0 2,2 2,5 3,2 4,0 4,5 5,0 6,3 7,1 8,0 9,0
2,5 X X X X
2,8 X X X X X
3,2 X X X X
3,6 X
4,0 X X X X X X X
4,5 X
5,0 X X X X X
5,6 X X
6,3 X
7,1 X
8,0 X X
9,0 X
10,0 X X
12,0 X
294 6.3 Tolerance for outline dimensions
295 Tolerance for outline dimension and height shall be selected from Table 6.
296 Table 6 – Tolerance for outline dimension and height
Tolerances
Outline dimensions (X)
mm
mm
Standard Maximum
× ≤ 0,6 ±0,05 ±0,10
0,6 < × ≤ 1,0 ±0,10 ±0,20
1,0 < × ≤ 1,6 ±0,15 ±0,30
1,6 < × ≤ 2,5 ±0,20 ±0,40
2,5 < × ≤ 4,0 ±0,30 ±0,60
4,0 < × ≤ 8,0 ±0,40 ±0,80
8,0 < × ≤ 10,0 ±0,50 ±1,00
IEC CDV 62674-1 © IEC 2024 – 12 – 51/1505/CDV
297 7 Ratings and characteristics
298 7.1 Nominal inductance or impedance
299 The preferred values of nominal inductance or impedance shall be selected from the numeric
300 values of the E 24 series in Table 7 and their decimal multiples or submultiples.
301 The detail specification sheet should clearly note whether the value given is inductance or
302 impedance, as well as the units and measuring frequency. The choice of specifying either
303 inductance or impedance depends on the intended application for the inductor.
304 Table 7 – E 24 series for nominal inductance or impedance
1,0 1,1 1,2 1,3 1,5 1,6 1,8 2,0 2,2 2,4 2,7 3,0
3,3 3,6 3,9 4,3 4,7 5,1 5,6 6,2 6,8 7,5 8,2 9,1
306 7.2 Tolerance for nominal inductance or impedance
307 The tolerance for nominal inductance or impedance shall be selected from Table 8 which
308 includes the tolerances specified in IEC 61605:2016, Table 4.
309 Table 8 – Tolerance for nominal inductance or impedance
±0,05 ±0,1 ±0,2 ±0,3 ±0,5 ±1 ±2 ±3 ±5 ±10 ±15 ±20 ±25 ±30
Tolerance
nH nH nH nH nH % % % % % % % % %
Letter
W B C S D F G H J K L M - N
code
NOTE 1 nH should be applied to inductance only.
NOTE 2 ±25 % should be applied to impedance only.
311 7.3 Operating temperature range
312 The operating temperature range shall be selected from a lower temperature and an upper
313 temperature in Table 9. Examples of the application and operating temperature range (user
314 reference) are shown in Table 10.
315 Table 9 – Temperatures to be selected for operating temperature ranges
Lower temperature Upper temperature
°C °C
–55 +175
–40 +155
–25 +150
–10 +125
+105
+100
+85
+70
+40
NOTE Unless otherwise specified in the detail specification, the
operating temperature is the ambient temperature plus the
51/1505/CDV – 13 – IEC CDV 62674-1 © IEC 2024
temperature rise of components.
317 Table 10 – User reference /
318 Examples of application and operating temperature range
Category applies Temperature range Standard identification
°C
Automobile and aerospace –55 to +175
–55 to +155 MIL-PRF-27, Class V
–55 to +150 IEC 62211:2017, Level S
–55 to +125 -
–40 to +150 -
–40 to +125 IEC 62211::2017,Level A
Telecommunication and power supply –55 to +105 MIL-PRF-27, Class R
–55 to +85 MIL-PRF-27, Class Q
–40 to +125 IEC 62211:2017, Level B
–40 to +105 IEC 62211:2017, Level B
–40 to +85 IEC 62211:2017, Level B
Consumer and commercial electronics –40 to +85 IEC 62211:2017, Level C
–25 to +105
–25 to +100 -
–25 to +85 -
–25 to +70 IEC 62211:2017, Level D
0 to +70
NOTE AEC Q200 and IEC 62211:2003 are component-level reliability specifications. A
distinction exists between component-level and system-level specifications.
320 8 Marking
321 The selection of type(s) of marking information is subject to agreement between supplier and
322 user. In lieu of such an agreement, the marking information should be as published in the
323 supplier’s data sheet. One or more of the following types of marking information is
324 recommended on the body or the packaging:
325 c) user part number;
326 d) serial number, lot code or date code;
327 e) characteristics as specified in IEC 61605:2016;
328 f) supplier part number and logo or mark;
329 g) quantity (packaging only).
330 9 Direction marking or shape of polarity
331 For the purpose of indicating the winding start location, or the first pin number, or first
332 electrode, or winding orientation, either a mark or a shape should be used. A shape inductor
333 is a corner cut, or small circle indent, or other molded feature, or terminal shape that indicates
334 polarity on the inductor (if such an indication is necessary).
IEC CDV 62674-1 © IEC 2024 – 14 – 51/1505/CDV
335 10 Tests and performance requirements
336 10.1 Standard atmospheric conditions for testing
337 10.1.1 Standard atmospheric conditions for measurements and tests
338 Unless otherwise specified, all tests and measurements shall be made under standard
339 atmospheric conditions as given in IEC 60068-1:2013, Table 2:
340 – temperature: 15 °C t
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