IEC 62490-1:2010

IEC 62490-1 ®
Edition 1.0 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
ESL measuring method –
Part 1: Capacitors with lead terminal for use in electronic equipment

Méthode de mesure de l’ESL –
Partie 1: Condensateurs à bornes de sortie utilisés dans les équipements
électroniques
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IEC 62490-1 ®
Edition 1.0 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
ESL measuring method –
Part 1: Capacitors with lead terminal for use in electronic equipment

Méthode de mesure de l’ESL –
Partie 1: Condensateurs à bornes de sortie utilisés dans les équipements
électroniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 31.060.01 ISBN 978-2-88912-068-0
– 2 – 62490-1 © IEC:2010
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 Measurement jig, short compensation jig, and spacer.5
4.1 Measurement jig (test fixture) .5
4.2 Short compensation jig .5
4.3 Spacer .6
5 Measuring method.7
5.1 Measuring instrument .7
5.2 Measurement conditions.7
5.3 Preparation of sample .8
5.4 Measurement points .8
5.5 Frequency and signal level.8
5.6 Measurement procedure.8
5.6.1 General .8
5.6.2 Open compensation.9
5.6.3 Short compensation.9
5.6.4 ESL measurement .9
6 Items to be indicated in test result report .10
Annex A (informative) The basic concept on ESL measuring method .11

Figure 1 – Short compensation jig.6
Figure 2 – Constructional example of the short compensation spacer and the
measurement spacer .7
Figure 3 – Measure points: seating plane or flange of capacitor on the printed circuit
board .8
Figure 4 – Method of short compensation .9
Figure 5 – Example in state where electrode of measurement jig shifted.10
Figure A.1 – Fundamental view of ESL measurement .11

62490-1 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ESL MEASURING METHOD –
Part 1: Capacitors with lead terminal
for use in electronic equipment

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62490-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
40/2044/FDIS 40/2056/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 62490 series, under the general title ESL measuring method,
can be found on the IEC website.

– 4 – 62490-1 © IEC:2010
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
62490-1 © IEC:2010 – 5 –
ESL MEASURING METHOD –
Part 1: Cap with lead terminal
for use in electronic equipment

1 Scope
This part of IEC 62490 provides the equivalent series inductance L (ESL) measuring method
for capacitors with lead terminal type for use in electronic equipment.
The inductance values of capacitors provided for this document are within the range of 1 nH
to 10 nH.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60384-1:2008, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
3 Terms and definitions
For the purpose of this document, the terms and definitions given in IEC 60384-1 and the
following apply.
3.1
equivalent series inductance L
ESL
inductive part of the impedance of capacitors
NOTE 1 The unit of ESL is Henry (H).
4 Measurement jig, short compensation jig, and spacer
4.1 Measurement jig (test fixture)
The measurement jig shall have the following features:
a) the lead terminal holding method shall be screw up;
b) the measurement jig has two pairs of screw-fixation electrodes for fixing the lead terminals
of the capacitor to be measured. In pairs, one of the electrodes is fixed t
...