EN 61643-321:2002

Components for low-voltage surge protective devices - Part 321: Specifications for Avalanche Breakdown Diode (ABD)

Is applicable to avalanche breakdown diodes (ABDs) which represent one type of surge protective device component (hereinafter referred to as SPDC) used in the design and construction of surge protective devices connected to low-voltage power distribution systems, transmission, and signalling networks. Test specifications in this standard are for single ABDs consisting of two terminals. However, multiple ABDs may be assembled within a single package defined as a diode array. Each diode within the array can be tested to this specification. This standard contains a series of test criteria for determining the electrical characteristics of the ABD. From the standard test methods described herein, the performance characteristics and ratings of the ABD can be verified or established for specific packaged designs.

Bauelemente für Überspannungsschutzgeräte für Niederspannung - Teil 321: Festlegungen für Avalanche-Dioden (ABD)

Composants pour parafoudres basse tension - Partie 321: Spécifications pour les diodes à avalanche (ABD)

Est applicable aux diodes à avalanche (ABD) qui représentent un type de composants des parafoudres (appelés ci-après SPDC) utilisés lors de la conception et la réalisation des parafoudres connectés aux réseaux basse tension de puissance, de transmission et de communication. Les spécifications d'essais de la présente norme concernent les diodes à avalanche simples à deux bornes. Toutefois, les diodes à avalanche multiples peuvent être intégrées dans un seul boîtier défini comme un ensemble de diodes. Chaque diode de cet ensemble peut être testée selon cette spécification. Cette norme contient une série de critères d'essais pour la détermination des caractéristiques électriques des diodes à avalanche. A partir des méthodes normalisées d'essais décrites ci-après, les caractéristiques de fonctionnement et les valeurs assignées des diodes à avalanche peuvent être établies et vérifiées pour des conceptions particulières.

Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 321. del: Specifikacije za diode s plazovitim prebojem (ABD) (IEC 61643-321:2001)

General Information

• Status: Published
• Publication Date: 20-Feb-2002
• Withdrawal Date: 31-Jan-2005
• ICS: 31.080.10 - Diodes
• Technical Committee: CLC/SR 37B - Specific components for surge arresters and surge protective devices
• Drafting Committee: IEC/SC 37B - IEC_SC_37B
• Parallel Committee: IEC/SC 37B - IEC_SC_37B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 21-Feb-2002
• Completion Date: 21-Feb-2002
• Ref Project: SIST EN 61643-321:2002 - Components for low-voltage surge protective devices -- Part 321: Specifications for Avalanche Breakdown Diode (ABD)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2002
6HVWDYQLGHOL]DQL]NRQDSHWRVWQHQDSUDYH]D]DãþLWRSUHGSUHQDSHWRVWQLPLXGDUL
GHO6SHFLILNDFLMH]DGLRGHVSOD]RYLWLPSUHERMHP$%',(&
Components for low-voltage surge protective devices -- Part 321: Specifications for
Avalanche Breakdown Diode (ABD)
Bauelemente für Überspannungsschutzgeräte für Niederspannung -- Teil 321:
Festlegungen für Avalanche-Dioden (ABD)
Composants pour parafoudres basse tension -- Partie 321: Spécifications pour les
diodes à avalanche (ABD)
Ta slovenski standard je istoveten z: EN 61643-321:2002
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
31.080.10 Diode Diodes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61643-321
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2002
ICS 31.080.10
English version
Components for low-voltage surge protective devices
Part 321: Specifications for avalanche breakdown diode (ABD)
(IEC 61643-321:2001)
Composants pour parafoudres Bauelemente für Überspannungs-
basse tension schutzgeräte für Niederspannung
Partie 321: Spécifications pour Teil 321: Festlegungen für
les diodes à avalanche (ABD) Avalanche-Dioden (ABD)
(CEI 61643-321:2001) (IEC 61643-321:2001)
This European Standard was approved by CENELEC on 2002-02-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61643-321:2002 E
Foreword
The text of document 37B/59/FDIS, future edition 1 of IEC 61643-321, prepared by SC 37B, Specific
components for surge arresters and surge protective devices, of IEC TC 37, Surge arresters, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61643-321 on
2002-02-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-02-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61643-321:2001 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 61643-321:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60068 Series Environmental testing EN 60068 Series
IEC 60364 Series Electrical installations of buildings HD 384 S2 Series
(mod)
IEC 60364-3 1993 Electrical installations of buildings HD 384.3 S2 1995
(mod) Part 3: Assessment of general
characteristics
IEC 60721 Series Classification of environmental EN 60721 Series
conditions
IEC 60747-2 2000 Semiconductor devices - Discrete--
devices and integrated circuits
Part 2: Rectifier diodes
IEC 60749 1996 Semiconductor devices - Mechanical EN 60749 1999
and climatic test methods
NORME CEI
INTERNATIONALE IEC
61643-321
INTERNATIONAL
Première édition
STANDARD
First edition
2001-12
Composants pour parafoudres
basse tension –
Partie 321:
Spécifications pour les diodes
à avalanche (ABD)
Components for low-voltage surge
protective devices –
Part 321:
Specifications for avalanche
breakdown diode (ABD)
 IEC 2001 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
P
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61643-321 © IEC:2001 – 3 –
CONTENTS
FOREWORD.3
1 Scope.7
2 Normative references .7
3 Definitions and symbols.7
4 Basic function and description for ABDs .13
5 Service conditions .17
6 Standard test methods and procedures.17
6.1 Standard design test criteria.17
6.2 Test conditions .17
6.3 Clamping voltage V (see figure 2).19
C
6.4 Rated peak impulse current I (see figure 2) .19
PPM
6.5 Maximum working voltage V and maximum working r.m.s. voltage V
WM WMrms
(see figure 3).19
6.6 Stand-by current I (see figure 3) .21
D
6.7 Breakdown (avalanche) voltage V (see figure 4) .21
BR
6.8 Capacitance C .23
j
6.9 Rated peak impulse power dissipation P .23
PPM
6.10 Rated forward surge current I (see figure 1c).23
FSM
6.11 Forward voltage V .23
FS
6.12 Temperature coefficient of breakdown voltage αV .25
BR
6.13 Temperature derating (see figure 5) .25
6.14 Thermal resistance R or R or R .25
thJA thJC thJL
6.15 Transient thermal impedance Z or Z or Z .25
thJA thJC thJL
6.16 Rated average power dissipation P .27
MAV
6.17 Peak overshoot voltage V (see figure 7) .27
OS
6.18 Overshoot duration (see figure 7) .27
6.19 Response time (see figure 7).27
7 Fault and failure modes .31
7.1 Degradation fault mode .31
7.2 Short-circuit failure mode.31
7.3 Open-circuit failure mode .31
7.4 "Fail-safe" operation .31
Figure 1 – Structure, bias condition and V-I characteristics for a unidirectional ABD .13
Figure 2 – Test circuit for clamping voltage V , peak impulse current I , and rated
C PP
forward surge current I .19
FSM
Figure 3 – Test circuit for verifying maximum working voltage V stand-by current I
WM D
and maximum working r.m.s. voltage V .21
WMrms
Figure 4 – Test circuit for verifying breakdown (avalanche) voltage V .21
BR
Figure 5 – Test circuit for verifying forward voltage V .23
FS
Figure 6 – Derating curve for ABD components.27
Figure 7 – Graph illustrating voltage overshoot, response time and overshoot duration.29
Figure 8 – Impulse current waveform .29

61643-321 © IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 321: Specifications for avalanche breakdown diode (ABD)
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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3) The documents produced have the form of recommendations for international use and are published in the form
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equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61643-321 has been prepared by subcommittee 37B: Specific
components for surge arresters and surge protective devices, of IEC technical committee 37:
Surge arresters.
The text of this standard is based on the following documents:
FDIS Report on voting
37B/59/FDIS 37B/62/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 3.
The committee has decided that the contents of this publication will remain unchanged
until 2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61643-321 © IEC:2001 – 7 –
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 321: Specifications for avalanche breakdown diode (ABD)
1 Scope
...