SIST EN IEC 63508:2026

SLOVENSKI STANDARD
01-december-2026
Baza podatkov CDD - Odklopniki in podobna oprema za gospodinjsko uporabo
(IEC 63508:2026)
CDD database - Circuit-breakers and similar equipment for household use (IEC
63508:2026)
CDD-Datenbank - Leitungsschutzschalter und ähnliche Geräte für den Hausgebrauch
(IEC 63508:2026)
Base de données CDD - Disjoncteurs et appareillage similaire pour usage domestique
(IEC 63508:2026)
Ta slovenski standard je istoveten z: EN IEC 63508:2026
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
35.240.99 Uporabniške rešitve IT na IT applications in other fields
drugih področjih
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63508

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2026
ICS 29.020; 29.120.50
English Version
CDD database - Circuit-breakers and similar equipment for
household use
(IEC 63508:2026)
Base de données CDD - Disjoncteurs et appareillage CDD-Datenbank - Leitungsschutzschalter und ähnliche
similaire pour usage domestique Geräte für den Hausgebrauch
(IEC 63508:2026) (IEC 63508:2026)
This European Standard was approved by CENELEC on 2026-05-13. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63508:2026 E
European foreword
The text of document 23E/1414/FDIS, future edition 1 of IEC 63508, prepared by SC 23E "Circuit-
breakers and similar equipment for household use" of IEC/TC 23 "Electrical accessories" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 63508:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-05-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-05-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63508:2026 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60529:1989 NOTE Approved as EN 60529:1991 (not modified)
IEC 60715:2017 NOTE Approved as EN 60715:2017 (not modified)
IEC 60898-1:2015 NOTE Approved as EN 60898-1:2019 +A11:2024
IEC 60898-1:2015/AMD1:2019 NOTE Approved as EN 60898-1:2019/A1:2024 (not modified)
IEC 60947-2:2024 NOTE Approved as EN IEC 60947-2:2025 (not modified)
IEC 61360-1:2017 NOTE Approved as EN 61360-1:2017 (not modified)
IEC 61360-2:2012 NOTE Approved as EN 61360-2:2013 (not modified)
IEC 62683-1:2017 NOTE Approved as EN 62683-1:2017 (not modified)

IEC 63508 ®
Edition 1.0 2026-04
INTERNATIONAL
STANDARD
CDD database - Circuit-breakers and similar equipment for household use

ICS 29.020; 29.120.50 ISBN 978-2-8327-1176-7

IEC 63508:2026-04(en)
IEC 63508:2026 © IEC 2026
CONTENTS
FOREWORD . 2
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description of data formats . 6
5 Overview of the structure of this domain (IEC 63508) . 7
6 Device classes . 7
6.1 Device class attributes . 7
6.2 Classification of circuit-breakers and similar equipment for household use . 7
7 Block of properties . 8
7.1 General . 8
7.2 Miniature circuit-breaker (MCB) . 9
7.2.1 General. 9
7.2.2 AC miniature circuit-breaker . 9
8 Properties . 12
8.1 Criteria for naming properties . 12
8.2 Device properties. 12
Annex A (Informative) Data formats description . 29
Bibliography . 32

Figure 1 – Width in number of modular spacings . 27
Figure 2 – Mounting depth of the modular device . 27
Figure 3 – Height of the device . 27

Table 1 – Circuit-breakers and similar equipment for household use classification . 8
Table 2 – Library of blocks used in the device classes. 9
Table 3 – AC miniature circuit-breaker . 10
Table 4 – Library of properties used in the device classes . 13
Table 5 – Value lists of properties . 28
Table A.1 – Some format examples . 31

IEC 63508:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CDD database - Circuit-breakers and similar equipment for household use

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 electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63508 has been prepared by subcommittee 23E: Circuit-breakers and similar equipment
for household use, of IEC technical committee 23: Electrical accessories. It is an International
Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
23E/1414/FDIS 23E/1418/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
IEC 63508:2026 © IEC 2026
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 63508:2026 © IEC 2026
INTRODUCTION
The growing use of protection devices (e.g. miniature circuit-breakers as defined in
IEC 60898-1), and the need to move toward more digital tools and processes rely on the
description of such devices being made available in the most adequate digital format.
To serve as a reference in this effort of standardisation, the IEC provides a support for gathering
all contributions for device descriptions under the IEC Common Data Dictionary (IEC CDD).
Such work at IEC level aims to provide unambiguous semantics for the protection devices,
which is consistent with its product standard, and made available for use on the market by the
various stakeholders.
The intended benefits of this document are to:
– reduce the costs and efforts in mapping data for each customer request;
– optimize the workflow of B2B exchanges;
– minimize duplication of articles in customer inventories and in databases;
– minimize losses and misinterpretation of data during exchanges;
– facilitate the selection of a product, especially regarding reliability and safety;
– give access to product data everywhere regardless of country, language and culture;
– provide product data related to environmental aspects such as environmental declaration;
– contribute to the fast growth of e-business by simplifying the development of:
• e-catalogue allowing the differentiation of products performances, certificates, etc.;
• e-commerce: use of electronic networks to exchange information, products, services and
payments for commercial and communication purposes between individuals
(consumers) and businesses, and between businesses themselves;
– enable new e-business models
The output of this document is a reference dictionary for protection devices for use in e-
commerce, in software, and in any application for product selection.

IEC 63508:2026 © IEC 2026
1 Scope
The purpose of this document is to describe product classes and properties, representing the
miniature circuit-breaker (MCB), to become a part of the IEC 61360-4: IEC Common Data
Dictionary (IEC CDD). It includes data required for product selection as well as data required
for engineering.
This document intends, as a contribution to the IEC Common Data Dictionary, to be used by
catalogue consortia, other database standards and software as a data reference for
circuit-breakers and similar equipment for household use.
NOTE In the future, it is intended to extend the IEC 63508 DB to other types of products e.g. arc fault detection
devices (AFDDs), residual current circuit breakers (RCCBs), residual circuit breaker with overcurrent protection
(RCBOs).
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1
attribute
data element for the computer-sensible description of a property, a relation or a class
EXAMPLE The name of a property, the code of a class, the measure unit in which values of a property are provided.
Note 1 to entry: An attribute describes only one single detail of a property, of a class or of a relation.
[SOURCE: IEC 61360-1:2017, 3.1.2]
3.2
block of properties
block
collection of properties describing one common aspect of the device class
Note 1 to entry: A block is a feature class in the sense of IEC 61360-1 and ISO 13584-42.
EXAMPLE Diagnostic functions, control circuit.
[SOURCE: IEC 62683-1:2017, 3.2]
IEC 63508:2026 © IEC 2026
3.3
class
abstraction of a set of similar products
Note 1 to entry: A product that complies with the abstraction defined by a class is called a class member.
Note 2 to entry: A class is an intentional concept that can take different extensional meanings in different contexts.
Note 3 to entry: Classes are structured by class inclusion relationships.
[SOURCE: IEC 61360-1:2017, 3.1.6, modified – The example as well as Notes 4 and 5 to entry
have been deleted.]
3.4
enumeration
list of named constants called enumerators, each enumerator name in the enumeration being
unambiguous
[SOURCE: IEC 61360-1:2017, 3.1.13]
3.5
property
defined parameter suitable for the description and differentiation of a specific characteristic
describing an aspect of device class
Note 1 to entry: A property can have attributes such as code, version, and revision.
Note 2 to entry: The specification of a property can include predefined choices of values.
[SOURCE: IEC 62683-1:2017, 3.7, modified - Notes 1 and 2 to entry have been added.]
4 Description of data formats
The IEC 61360 series comprises the reference documents describing the different formats that
are intended to be used for a product's description.
The IEC Common Data Dictionary (IEC CDD) is an International Standard (IEC 61360-4 DB)
and serves as a common product data dictionary for all industrial and technical domains
(electrotechnical and non-electrotechnical, e.g. industry, building, energy, healthcare) based
on the methodology and the information model of IEC 61360 series, and provides:
– unambiguous identification of classes and properties, and their relations;
– commonly accepted terminology and definitions based on accepted sources such as IEC
International Standards, other International Standards, industry standards, or public
authorities;
– hierarchies of concepts enabling users to appropriately characterize their products and
services;
– relevant conditions and constraints, if necessary, on possible values of characteristics;
– technical representation of concepts, including units and data types and their identification.
To assist readers of this document, a selection of useful definitions for data formats and
concepts (taken from IEC 61360-1) is available in Annex A.
IEC 63508:2026 © IEC 2026
5 Overview of the structure of this domain (IEC 63508)
This document aims to initiate a domain to become a contribution to the IEC CDD. This domain
is a collection of properties and blocks of properties to describe the products identified in this
first approach focused on miniature circuit-breakers.
This domain will be completed in a further stage by properties necessary to describe other
products e.g. AFDDs, RCCBs, RCBOs.
It is noted that another domain named "Low voltage switchgear and controlgear" is published
in IEC CDD as IEC 62683-1.
To avoid duplicated properties, it is intended to re-use existing properties and blocks from the
domain "Low voltage switchgear and controlgear" (see IEC 62683-1) in the new domain for
miniature circuit-breakers, wherever applicable. Such re-used blocks or properties have
identifiers (ID) starting with ACC or ACE.
6 Device classes
6.1 Device class attributes
The attributes of the device class have been prepared in compliance with IEC 61360-1.
The following attributes of a device class are considered in this document: identifier,
preferred name, definition, synonymous name and source document.
NOTE The synonymous names are limited to those necessary to avoid confusion when selecting a device class.
6.2 Classification of circuit-breakers and similar equipment for household use
Table 1 gives the classification of circuit-breakers and similar equipment for household use
domain, based on the corresponding product standards. The class name column is structured
into four levels of hierarchy using indent alignments.
IEC 63508:2026 © IEC 2026
Table 1 – Circuit-breakers and similar equipment for household use classification
Class preferred Code
name
Definition Source
(Class
ID)
(Class sheet)
Domain - Circuit- domain covering protection devices for household with
breakers and rated currents not exceeding 125 A and rated voltages
similar equipment not exceeding 440 V
for household
NOTE The domain covers the following device types:
– circuit-breakers and residual current devices of rated
currents not exceeding 125 A and rated voltages not
exceeding 440 V for protection against overcurrent
and/or against electric shock in domestic and similar
installations,
– residual current monitors (RCM) for household and
similar applications,
– circuit-breakers for equipment of rated currents not KDA001
exceeding 125 A and rated voltages not exceeding
440 V designed to protect equipment for use in
domestic and similar installations,
– control and protection devices for electric vehicle
supplies,
– arc fault detection devices (AFDD) of rated currents
not exceeding 125 A and rated voltages not
exceeding 440 V for household and similar uses,
– automatic reclosing devices,
– power frequency overvoltage protection devices.
Classes root
identifier -
Circuit-breakers heading number for classification of circuit-breakers and
KDA010
and similar similar equipment for household use
equipment for
household
Classes -
Miniature circuit-
breakers for circuit-breakers for domestic and similar purpose of
overcurrent rated currents not exceeding 125 A and rated voltages
KDA020
protection for not exceeding 440 V for protection of wiring against
household and overcurrents in domestic and similar installations
similar
installations
AC miniature mechanical switching device for AC application, capable IEC 60050-441:1984,
circuit-breaker of making, carrying and breaking currents under normal 441-14-20, modified
circuit conditions and also making, carrying for a - "AC miniature" has KDA021
specified time and breaking currents under specified been added to the
abnormal circuit conditions such as those of short-circuit term

7 Block of properties
7.1 General
A block of properties gathers properties necessary to describe a device. A property within a
block shall describe one common aspect covered by the definition of this block.
Blocks are defined at a generic level and at a specialized level to describe a specific version of
the device.
The list of blocks of properties is defined in Table 2.
IEC 63508:2026 © IEC 2026
Table 2 – Library of blocks used in the device classes
Block preferred name Code
Definition Source
(Class sheet) (Class ID)
blocks root - circuit- heading number for blocks of properties to
breakers and similar describe all types of products within this KDA011
equipment for household domain
specialised blocks root -
heading number for specialised blocks of
circuit-breakers and
properties to describe all types of products KDE005
similar equipment for
within this domain
household
information necessary for unambiguous
identification KDF010
identification of the device
general technical data general technical aspects of the device KDA220
all the conductive parts of a switching device
main circuit included in the circuit which it is designed to KDA221
close or open
short-circuit conditions, stated by the
short-circuit manufacturer, which the device can make, KDA222
withstand or break satisfactorily
release which causes a mechanical switching
tripping characteristics KDA223
device to open in specified conditions
all the conductive parts of the device which
control and auxiliary
are intended to be included in a circuit other KDA224
circuits
than the main circuit
installation, mounting and physical information of the device for
KDA225
dimensions installation
terminals, screws or other parts, used for the
connection facilities electrical connection of conductors of KDA226
external circuits of the device
physical conditions such as ambient
temperature, pressure, radiation, humidity,
IEC 60050-95:2014,
chemical spray expected as normal operating
environmental conditions KDA227
395-07-98
conditions or resulting from postulated
initiating events
conformity of a device with specified
product certificates and
requirements and compliance with recognized KDA228
standards
product standards
The purpose of Table 2 is to list the generic blocks at the top of the ontology. Specialisation
blocks (with relevant properties selected from generic blocks) used for the actual construction
of the database are not listed.
7.2 Miniature circuit-breaker (MCB)
7.2.1 General
Table 3 provides the list of properties for each block.
7.2.2 AC miniature circuit-breaker

IEC 63508:2026 © IEC 2026
Table 3 – AC miniature circuit-breaker
Blocks and properties Class ID Property ID Comment
AC miniature circuit-breaker KDA021
Identification KDF010
name of manufacturer CBA031
Uniform resource identifier (URI) of manufacturer CBA032
URI of manufacturer logo CBA033
country of origin CBA034
name of supplier CBA035
type name of product CBA037
family name of product CBA038
model name of product CBA039
code of product CBA040
order code of product CBA041
article number CBA042
global trade item number (GTIN) CBA043
URI of product type CBA057
number of customs tariff numbers CBA053
Customs tariff number CAA005
type of customs tariff number CBA009
customs tariff number CBA010
use of customs tariff number CBA011
region of customs tariff number CBA012
country of customs tariff number CBA013
HS-Code of the WCO CBA014
General technical data KDA220
degree of protection of front face ACE247
kind of current ACE601
degree of protection of terminals ACE248
provision for locking ACE243
isolating function ACE204
Main circuit KDA221
number of poles ACE401
number of switched poles  KDB021
number of protected poles ACE410
rated current  ACE424
rated operational voltage, AC ACE457
rated supply frequency ACE532
rated insulation voltage, AC KDB002
power losses per pole, AC KDB003
rated operational voltage for IT systems, AC KDB025
rated impulse withstand voltage ACE460
overvoltage category KDB020
Short-circuit KDA222
IEC 63508:2026 © IEC 2026
Blocks and properties Class ID Property ID Comment
rated short-circuit capacity, AC, 230 V (I )
KDB004
cn
rated short-circuit capacity, AC, 400 V (I )
KDB005
cn
energy limiting class according to relevant EN standard KDB006
rated making and breaking capacity of an individual pole, AC (I )
KDB007
cn1
rated ultimate short-circuit breaking capacity, AC, 230 V (I )
ACE716
cu
rated ultimate short-circuit breaking capacity, AC, 400 V (I )
ACE702
cu
rated service short-circuit breaking capacity, AC, 230 V (I )
ACE715
cs
rated service short-circuit breaking capacity, AC, 400 V (I )
ACE701
cs
Tripping characteristics KDA223
reference calibration temperature KDB008
range of instantaneous tripping current KDB009
derating of tripping characteristic based on temperature KDB010
reference temperature of non-compensated release ACE744
instantaneous short-circuit current setting, AC KDB026
Control and auxiliary circuits KDA224
additional equipment possible KDB011
Installation, mounting and dimensions KDA225
mounting onto standard rail ACE804
height of the device ACE801
spacing in number of modules KDB012
mounting depth of the modular device KDB013
product mass ACE808
Connection facilities KDA226
dedicated comb busbar terminal KDB014
dual combined terminal KDB015
cross-section of rigid conductor ACE867
cross-section of flexible conductor ACE865
type of line side terminals KDB016
type of load side terminals KDB017
Environmental conditions KDA227
ambient air temperature ACE440
pollution degree KDB018
Product certificates and standards KDA228
environmental declaration ACE903
residential and tertiary product standards KDB022
conformity marks KDB019
certificates and approvals ACE902

IEC 63508:2026 © IEC 2026
8 Properties
8.1 Criteria for naming properties
In order to maintain consistency and clarity in the naming of properties, terms from product
standards shall be used when they are available.
Synonymous names may be associated with the property name when well established terms
are used on the market.
8.2 Device properties
The properties listed in Table 4 are depicted with only eight attributes. More attributes are given
in the IEC CDD. The lists of values for each value list code are given in Table 5.

IEC 63508:2026 © IEC 2026
Table 4 – Library of properties used in the device classes
Synonymous Value
Property ID Preferred name Definition Definition source Symbol Unit Data type
name format
designation of the entity,
name of company or organization
CBA031   TRANSLATABLE_STRING_TYPE
manufacturer responsible for the
manufacturing of the product
fully qualified domain name
of the manufacturer of a
product using a uniform
URI of
CBA032 resource identifier (URI)  URI_TYPE
manufacturer
NOTE 1 The URI comprises
the URL and the URN
link to graphical symbol used
to represent a manufacturer,
URI of
CBA033 a company, an organisation  URI_TYPE
manufacturer logo
or a product using a uniform
resource identifier (URI)
country where the product
CBA034 country of origin   ENUM_STRING_TYPE(CEA008)
was manufactured
designation of the entity,
company or organization
responsible for the market
distribution of the product
CBA035 name of supplier   TRANSLATABLE_STRING_TYPE
NOTE 2 Upstream suppliers
of the components of the
product are excluded.
first level of a product
description hierarchy as
defined by the manufacturer,
type name of
...