IEC 62674-1:2012

IEC 62674-1 ®
Edition 1.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High frequency inductive components –
Part 1: Fixed surface mount inductors for use in electronic and
telecommunication equipment
Composants inductifs à haute fréquence –
Partie 1: Inductances fixes pour montage en surface utilisées dans les matériels
électroniques et les équipements de télécommunications

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IEC 62674-1 ®
Edition 1.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High frequency inductive components –

Part 1: Fixed surface mount inductors for use in electronic and

telecommunication equipment
Composants inductifs à haute fréquence –

Partie 1: Inductances fixes pour montage en surface utilisées dans les matériels

électroniques et les équipements de télécommunications

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.100.10 ISBN 978-2-83220-399-6

– 2 – 62674-1  IEC:2012
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Designation . 7
5 Shape . 9
6 Dimensions . 10
6.1 Shape D . 10
6.2 Shape K . 11
6.3 Tolerance for outline dimensions . 11
7 Ratings and characteristics. 11
7.1 Nominal inductance or impedance . 11
7.2 Tolerance for nominal inductance or impedance . 12
7.3 Operating temperature range . 12
8 Marking . 13
9 Direction marking or shape of polarity. 13
10 Tests and performance requirements . 14
10.1 Standard atmospheric conditions for testing . 14
10.1.1 Standard atmospheric conditions for measurements and tests . 14
10.1.2 Referee condition . 14
10.2 Visual examination and check of dimensions . 14
10.2.1 Visual examination . 14
10.2.2 Dimensions. 14
10.3 Electrical performance tests . 15
10.3.1 Inductance . 15
10.3.2 Q . 18
10.3.3 Impedance . 22
10.3.4 Self-resonant frequency . 22
10.3.5 DC resistance . 24
10.3.6 Rated current . 25
10.4 Mechanical performance tests . 25
10.4.1 Mounting to substrate . 25
10.4.2 Body strength test . 25
10.4.3 Robustness of terminations (electrodes) . 25
10.4.4 Solderability . 26
10.4.5 Resistance to soldering heat. 26
10.4.6 Resistance to dissolution of metallization . 26
10.4.7 Vibration . 27
10.4.8 Resistance to shock . 27
10.5 Environmental and climatic tests . 27
10.5.1 Cold . 27
10.5.2 Dry heat . 28
10.5.3 Change of temperature . 29
10.5.4 Damp heat (steady state) . 29
10.5.5 Component solvent resistance . 30

62674-1  IEC:2012 – 3 –
Bibliography . 31

Figure 1 – Shapes of inductor and ferrite beads (examples) . 9
Figure 2 – Example of circuit for measurement by the bridge method . 15
Figure 3 – Example of circuit for measurement by the vector voltage/current method . 16
Figure 4 – Example of a circuit for measurement by the automatic balancing bridge
method . 17
Figure 5 – Example of circuit for measurement by the series resonance method . 19
Figure 6 – Example of a circuit for measurement by the parallel resonance method . 20
Figure 7 – Tuning characteristics of inductor . 20
Figure 8 – Example of circuit for measurement by the minimum output method . 23
Figure 9 – Example of measuring circuit for DC resistance . 24

Table 1 – Letter code for inductance value . 8
Table 2 – Dimensions for shape D . 10
Table 3 – Dimensions of height for shape D (R 20 series) . 10
Table 4 – Dimensions of height for shape D less than 1,00 mm . 10
Table 5 – Dimensions for shape K . 11
Table 6 – Tolerance for outline dimension and height . 11
Table 7 – E 24 series for nominal inductance or impedance . 12
Table 8 – Tolerance for nominal inductance or impedance . 12
Table 9 – Temperatures to be selected for operating temperature ranges . 12
Table 10 – User reference / Examples of application and operating temperature range . 13
Table 11 – Electrical performance . 26
Table 12 – Combined test conditions for cold . 28
Table 13 – Combined test conditions for dry heat. 28
Table 14 – Test conditions for change of temperature . 29
Table 15 – Test conditions for damp heat (steady state) . 30

– 4 – 62674-1  IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH FREQUENCY INDUCTIVE COMPONENTS –

Part 1: Fixed surface mount inductors for use in electronic
and telecommunication equipment

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and elect
...