prEN 50663:2025
(Main)Generic standard for assessment of low power electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (10 MHz - 300 GHz)
Generic standard for assessment of low power electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (10 MHz - 300 GHz)
This document provides electromagnetic field (EMF) exposure conformity assessment methods for low power electronic and electrical equipment. It is applicable to intentionally radiating equipment operating at frequencies between 10 MHz and 300 GHz with time-averaged transmitted power less than or equal to 20 mW in case of equipment intended for use by the general public, or less than or equal to 100 mW in case of equipment intended for use only by workers when at work, respectively. In the context of this document, time-averaging is over any 6-min period up to 10 GHz and over any 68/ƒ1.05 -minute period (ƒ in GHz) for frequencies exceeding 10 GHz. It also applies to non-intentionally radiating equipment in the same frequency range.
Produktnorm für die Beurteilung der Übereinstimmung von elektronischen und elektrischen Geräten kleiner Leistung mit den Basisgrenzwerten für die Exposition von Personen gegenüber elektromagnetischen Feldern (10 MHz bis 300 GHz)
Norme générique pour l'évaluation des appareils électriques et électroniques de faible puissance concernant les restrictions en matière d'exposition du corps humain aux champs électromagnétiques (10 MHz à 300 GHz)
Splošni standard za oceno skladnosti nizkonapetostne elektronske in električne opreme glede na mejne vrednosti izpostavljenosti ljudi elektromagnetnemu sevanju (10 MHz - 300 GHz)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Splošni standard za oceno skladnosti nizkonapetostne elektronske in električne
opreme glede na mejne vrednosti izpostavljenosti ljudi elektromagnetnemu
sevanju (10 MHz - 300 GHz)
Generic standard for assessment of low power electronic and electrical equipment
related to human exposure restrictions for electromagnetic fields (10 MHz - 300 GHz)
Produktnorm für die Beurteilung der Übereinstimmung von elektronischen und
elektrischen Geräten kleiner Leistung mit den Basisgrenzwerten für die Exposition von
Personen gegenüber elektromagnetischen Feldern (10 MHz bis 300 GHz)
Norme de produit pour l'évaluation de la conformité des appareils électriques et
électroniques de faible puissance aux restrictions de base concernant l'exposition des
personnes aux champs électromagnétiques (10 MHz à 300 GHz)
Ta slovenski standard je istoveten z: prEN 50663:2025
ICS:
13.280 Varstvo pred sevanjem Radiation protection
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD DRAFT
prEN 50663
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2025
ICS 17.240 Will supersede EN 50663:2017
English Version
Generic standard for assessment of low power electronic and
electrical equipment related to human exposure restrictions for
electromagnetic fields (10 MHz - 300 GHz)
Norme de produit pour l'évaluation de la conformité des Produktnorm für die Beurteilung der Übereinstimmung von
appareils électriques et électroniques de faible puissance elektronischen und elektrischen Geräten kleiner Leistung
aux restrictions de base concernant l'exposition des mit den Basisgrenzwerten für die Exposition von Personen
personnes aux champs électromagnétiques (10 MHz à 300 gegenüber elektromagnetischen Feldern (10 MHz bis 300
GHz) GHz)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-04-04.
It has been drawn up by CLC/TC 106X.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 72079 Ref. No. prEN 50663:2025 E
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Exposure conditions . 6
5 Normative limits . 7
5.1 Equipment used by the general public . 7
5.2 Equipment used only by workers . 7
6 Evaluation of compliance . 7
6.1 General considerations . 7
6.2 Low power exclusion level (P ) . 8
max
6.2.1 P based on considerations on SAR . 8
max
6.2.2 P based on considerations on SA . 8
max
6.2.3 P based on considerations on power density . 9
max
7 Assessment of uncertainty . 9
8 Evaluation report . 10
8.1 General . 10
8.2 Items to be recorded in the assessment report . 10
8.2.1 Assessment method . 10
8.2.2 Equipment related information . 10
8.2.3 Presentation of the measurement results . 10
8.2.4 Presentation of the calculation results . 11
Annex A (normative) Exposure limits for general public . 12
A.1 General (informative) . 12
A.2 Definitions . 12
A.3 Basic restrictions . 14
A.4 Reference levels. 15
A.5 Exposure from sources with multiple frequencies . 17
Annex B (normative) Exposure limits for workers . 21
B.1 General (informative) . 21
B.2 Definitions . 21
B.3 Exposure limit values and action levels in the frequency range from 0 Hz to 10 MHz (non-thermal
effects) . 23
B.4 Exposure limit values and action levels in the frequency range from 100 kHz to 300 GHz (thermal
effects) . 26
Annex ZZA (informative) Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered . 29
Annex ZZB (informative) Relationship between this European standard and the essential requirements
of Directive 2014/53/EU [2014 OJ L153] aimed to be covered. 30
Bibliography . 31
European foreword
This document (prEN 50663:2025) has been prepared by Technical Committee CLC/TC 106X
“Electromagnetic fields in the human environment”, the secretariat of which is held by DKE.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document will supersede EN 50663:2017 and all of its amendments and corrigenda (if any).
— The value applied to head and trunk is also applied to the limb in this edition.
— The conformity assessment is more detailed.
This document has been prepared under a standardization request addressed to CENELEC by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annexes ZZA and ZZB, which are an integral part of
this document.
1 Scope
This document provides electromagnetic field (EMF) exposure conformity assessment methods for low power
electronic and electrical equipment. It is applicable to intentionally radiating equipment operating
at frequencies between 10 MHz and 300 GHz with time-averaged transmitted power less than or equal to
20 mW in case of equipment intended for use by the general public, or less than or equal to 100 mW in case
of equipment intended for use only by workers when at work, respectively. In the context of this document,
1.05
time-averaging is over any 6-min period up to 10 GHz and over any 68/ƒ -minute period (ƒ in GHz) for
frequencies exceeding 10 GHz.
It also applies to non-intentionally radiating equipment in the same frequency range.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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.
EN 62479:2010, Assessment of the compliance of low power electronic and electrical equipment with the basic
restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz) (IEC 62479:2010)
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:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
low power equipment
equipment where the maximum time-averaged transmitted power is less than or equal to the low power
exclusion level
3.2
low power exclusion level
P
max
maximum time-averaged transmitted power which, depending on the user group, ensures that the applicable
basic restrictions for the general public laid down in Annex A, or the exposure limit values for workers laid
down in Annex B, are met
Note 1 to entry: values of P and the user groups are given in Table 1.
max
[SOURCE: EN 62479:2010, modified]
3.3
basic restrictions
restrictions on exposure of the general public to electric, magnetic and electromagnetic fields that are based
directly on established health effects and biological considerations as defined in Annex A
3.4
exposure limit values
restrictions on exposure of workers to electric, magnetic and electromagnetic fields that are based directly on
established health effects and biological considerations as defined in Annex B
3.5
reasonably foreseeable conditions
intended conditions of use as well as use of equipment in conditions, which results from lawful and readily
predictable human and system behaviour, that can be anticipated by the manufacturer
Note 1 to entry: Use conditions explicitly excluded by the manufacturer in the information for use or user training, but
nevertheless reasonably foreseeable under the assumption that the user has not read the information for use or has not
followed training instructions, are deemed to represent reasonably foreseeable misuse and such conditions fall outside
this definition. The first sentence of this note applies only
...
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