IEC 62333-3:2010

Noise suppression sheet for digital devices and equipment - Part 3: Characterization of parameters of noise suppression sheet

IEC 62333-3:2010 provides characterization of parameters for electromagnetic noise suppression sheet (NSS) for digital devices and equipment used in a frequency range between 30 MHz to 30 GHz. Guidance is given for uniform presentation of the properties of noise suppression sheet, intended for use in manufacturers and users technical data. NSS suppresses noise at its source, rather than absorbing noise at a distance. Therefore NSS is distinguished from RF wave absorbers used in free space. This standard addresses the following purposes of NSS manufacturers and users:
- it assists users in understanding the published technical data in catalogues;
- it guides users in selecting the most preferable NSS for each application;
- it establishes measurement benchmarking for manufacturers of performance in new development of NSS; and
- it maintains high reliability of NSS and applied products.
The numerical values given in this standard are typical values of parameters (properties) of the related NSS. The purpose of NSS testing is the benchmarking of materials. Predictions of specific device performance values are not always easy or even possible. Every detailed material and NSS specification should be agreed between the user and the manufacturer.

Plaque réduisant le bruit des dispositifs et appareils numériques - Partie 3: Caractérisation des paramètres des plaques réduisant le bruit

La CEI 62333-3:2010 présente la caractérisation des paramètres pour les plaques réduisant le bruit électromagnétique des dispositifs et appareils numériques utilisés dans une gamme de fréquences allant de 30 MHz à 30 GHz. Elle indique comment présenter uniformément les propriétés des plaques réduisant le bruit, dans le cadre des données techniques pour les fabricants et les utilisateurs. Les plaques réduisant le bruit réduisent le bruit à sa source, plutôt que de l'absorber à une certaine distance. Ainsi, les plaques réduisant le bruit se distinguent des absorbeurs d'ondes RF utilisés dans l'espace libre. La présente norme aborde les besoins suivants des fabricants et des utilisateurs de plaques réduisant le bruit:
- aider les utilisateurs à comprendre les données techniques publiées dans les catalogues;
- guider les utilisateurs dans leur choix de plaques réduisant le bruit pour chaque application;
- établir des mesures de référence pour les fabricants qui développent de nouvelles plaques réduisant le bruit; et
- maintenir une fiabilité élevée des plaques réduisant le bruit et des produits appliqués.
Les valeurs numériques données dans la présente norme sont des valeurs typiques de paramètres (propriétés) des plaques réduisant le bruit. Les essais sur les plaques réduisant le bruit ont pour objectif d'établir des références pour les matériaux. Il n'est pas toujours facile, voire possible, de prédire les valeurs des performances spécifiques de certains dispositifs. Il convient que chaque spécification particulière des plaques réduisant le bruit et des matériaux fasse l'objet d'un accord entre l'utilisateur et le fabricant.

General Information

• Status: Published
• Publication Date: 13-Jan-2010
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: WG 10 - TC 51/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2010
• Completion Date: 14-Jan-2010

Standards Content (Sample)

IEC 62333-3 ®
Edition 1.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Noise suppression sheet for digital devices and equipment –
Part 3: Characterization of parameters of noise suppression sheet

Plaque réduisant le bruit des dispositifs et appareils numériques –
Partie 3: Caractérisation des paramètres des plaques réduisant le bruit

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IEC 62333-3 ®
Edition 1.0 2010-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Noise suppression sheet for digital devices and equipment –
Part 3: Characterization of parameters of noise suppression sheet

Plaque réduisant le bruit des dispositifs et appareils numériques –
Partie 3: Caractérisation des paramètres des plaques réduisant le bruit

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 29.100.10 ISBN 978-2-88910-674-5
– 2 – 62333-3 © IEC:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 General .7
5 Parameters, descriptions and measuring methods.8
5.1 Material properties .8
5.1.1 Surface resistivity .8
5.1.2 Mechanical characteristics.8
5.1.3 Thermal conductivity.8
5.1.4 Environmental conditions.9
5.1.5 Statement for non-usage of the prohibited chemical materials .10
5.2 Structure .10
5.2.1 Thickness .10
5.2.2 Layer structure .10
Bibliography.11

Figure 1 – Framework of IEC 62333 series for noise suppression sheet.5
Figure 2 – Schematic diagram of thermal conductivity measuring apparatus .9
Figure 3 – Structure of NSS .10

Table 1 – Structural example .10

62333-3 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NOISE SUPPRESSION SHEET FOR DIGITAL
DEVICES AND EQUIPMENT –
Part 3: Characterization of parameters of noise suppression sheet

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62333-3 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
The text of this standard is based on the following documents:
FDIS Report on voting
51/970/FDIS 51/977/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 parts of the IEC 62333 series, under the general title Magnetic components and
ferrite materials, can be found on the IEC website.

– 4 – 62333-3 © IEC:2010
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
62333-3 © IEC:2010 – 5 –
INTRODUCTION
There are established standards for noise suppression sheet (NSS) as in IEC 62333-1 and in
IEC 62333-2.
Figure 1 shows the framework of IEC 62333 series for NSS.
Part 1 issues the general guidelines of IEC 62333 series. Part 2 establishes measurement
methods of four important suppression ratios for NSS.
This Part 3 specifies characterization of each parameter except suppression ratio of NSS,
which is determined in Part 2. Parameters prescribed in this part are divided into material
properties and structure.
IEC 62333-1
IEC 62333-2 and IEC 62333-3
Part 1: Definitions and Part 2: Measuring methods
general properties
Suppression ratio Suppression ratio (R , R , R and R )
da de tp rs
, R , R and R )
(R
da de tp rs
Part 3: Characterization of parameters of noise
suppression sheet
Others Material properties
Structure
IEC  2618/09
Figure 1 – Framework of IEC 62333 series for noise suppression sheet

– 6 – 62333-3 © IEC:2010
NOISE SUPPRESSION SHEET FOR DIGITAL
DEVICES AND EQUIPMENT –
Part 3: Characterization of parameters of noise suppression sheet

1 Scope
This part of IEC 62333 provides characterization of parameters for electromagnetic noise
suppression sheet (NSS) for digital devices and equipment used in a frequency range
between 30 MHz to 30 GHz. Guidance is given for uniform presentation of the properties of
noise suppression sheet, intended for use in manufacturers and users technical data. NSS
suppresses noise at its source, rather than absorbing noise at a distance. Therefore NSS is
distinguished from RF wave absorbers used in free space.
This standard addresses the following purposes of NSS manufacturers and users:
– it assists users in understanding the published technical data in catalogues;
– it guides users in selecting the most preferable NSS for each application;
– it establishes measurement benchmarking for manufacturers of performance in new
development of NSS; and
– it maintains high reliability of NSS and applied prod
...