SIST EN IEC 63267-3-61:2025
(Main)Fibre optic interconnecting devices and passive components - Fibre optic connector optical interfaces for enhanced macrobend multimode fibres - Part 3-61: Connector parameters of physically contacting 50 μm core diameter fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules for reference connection applications (IEC 63267-3-61:2025)
Fibre optic interconnecting devices and passive components - Fibre optic connector optical interfaces for enhanced macrobend multimode fibres - Part 3-61: Connector parameters of physically contacting 50 μm core diameter fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules for reference connection applications (IEC 63267-3-61:2025)
IEC 63267-3-61: 2025 defines the dimensional limits of an optical interface for reference connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules necessary to meet specific requirements for fibre-to-fibre interconnection of non-angled polished multimode reference connections as defined in IEC 63267-2-2. Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic connector interface standards. One grade of reference connector, Rm1, is defined in this document. The reference connector is terminated to restricted IEC 60793-2-10 using A1-OM2b to A1‑OM5b fibre in 850 nm band only. The geometrical dimensions and tolerances of the specified reference connector have been developed primarily to limit the variation in measured attenuation between multiple sets of reference connectors, and therefore to reduce the variation in measured attenuation between an arbitrarily chosen reference connector when mated with a connector in the field or factory.
This first edition and the first edition of IEC 63267-2-2 cancel and replace the first edition of IEC 61755-6-2 published in 2018. This edition constitutes a technical revision. The document includes the following significant technical changes with respect to the previous edition:
a) Definition of a reference grade, Rm1 interface;
b) Inclusion of A1-OM2b to A1-OM5b fibres;
c) Updates to normative references;
d) The addition of Annex A, which describes the attenuation test limits of reference grade Rm1 connectors to grade Bm connectors;
e) A new Annex B that describes the allowable fibre undercut.
Lichtwellenleiter – Verbindungselemente und passive Bauteile – Optische Schnittstellen von Lichtwellenleiter-Steckverbindern für verbesserte Makrobend-Multimodefasern – Teil 3-61: Parameter von Steckverbindern mit physikalischem Kontakt für Fasern mit 50 µm Kerndurchmesser – Nicht abgeschrägte zylindrische Vollzirkoniumdioxid- Ferrulen mit 2,5 mm und 1,25 mm Durchmesser für Referenzanschlussanwendung (IEC 63267-3-61:2025)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques des connecteurs fibroniques pour fibres multimodales améliorées en macrocourbures - Partie 3-61: Paramètres de connexion des fibres d’un diamètre de cœur de 50 µm en contact physique - Ferrules cylindriques non inclinées en zircone pleine de 2,5 mm et 1,25 mm de diamètre, pour les applications de connexion de référence (IEC 63267-3-61:2025)
IEC 63267-3-61: 2025 définit les limites dimensionnelles d’une interface optique pour des connecteurs de référence dotés de férules cylindriques en zircone (ZrO2) de 2,5 mm ou 1,25 mm de diamètre, qui sont nécessaires pour satisfaire aux exigences spécifiques pour l’interconnexion fibre à fibre des connexions de référence multimodales polies et non inclinées, telles qu’elles sont définies dans l’IEC 63267-2-2. Les dimensions et les caractéristiques des férules sont spécifiées dans les normes d’interfaces de connecteurs fibroniques de la série IEC 61754. Le présent document définit une classe de connecteur de référence, Rm1. Le connecteur de référence est raccordé à une sélection de fibres conformes à l’IEC 60793-2-10, soit les fibres des sous-catégories A1-OM2b à A1‑OM5b, et uniquement dans la bande de 850 nm. Les dimensions géométriques et les tolérances du connecteur de référence spécifié ont été développées principalement pour limiter les écarts au niveau de l’affaiblissement mesuré entre les différents ensembles de connecteurs de référence, et donc pour réduire les écarts au niveau de l’affaiblissement mesuré sur un connecteur de référence choisi arbitrairement, lorsqu’il est accouplé à un connecteur sur le terrain ou en usine.
Cette première édition et la première édition de l'IEC 63267-2-2 annulent et remplacent la première édition de l'IEC 61755-6-2 parue en 2018. Cette édition constitue une révision technique. Le document inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) définition d'une classe de référence, interface Rm1;
b) inclusion des fibres A1-OM2b à A1-OM5b;
c) mise à jour des références normatives;
d) ajout de l'Annexe A, qui décrit les limites de l’essai d’affaiblissement des connecteurs de classe de référence Rm1 par rapport aux connecteurs de classe Bm;
e) nouvelle Annexe B qui décrit le retrait admissible de la fibre.
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za izboljšana makrobend mnogorodovna vlakna - 3-61. del: Parametri konektorjev s fizičnim stikom za vlakna s premerom jedra 50 μm - Nekotne cilindrične polne cirkonijeve tulke s premerom 2,5 mm in 1,25 mm za aplikacije referenčnih konektorjev (IEC 63267-3-61:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za
izboljšana makrobend mnogorodovna vlakna - 3-61. del: Parametri konektorjev s
fizičnim stikom za vlakna s premerom jedra 50 μm - Nekotne cilindrične polne
cirkonijeve tulke s premerom 2,5 mm in 1,25 mm za aplikacije referenčnih
konektorjev (IEC 63267-3-61:2025)
Fibre optic interconnecting devices and passive components - Fibre optic connector
optical interfaces for enhanced macrobend multimode fibres - Part 3-61: Connector
parameters of physically contacting 50 μm core diameter fibres - Non-angled 2,5 mm
and 1,25 mm diameter cylindrical full zirconia ferrules for reference connection
applications (IEC 63267-3-61:2025)
Lichtwellenleiter – Verbindungselemente und passive Bauteile – Optische Schnittstellen
von Lichtwellenleiter-Steckverbindern für verbesserte Makrobend-Multimodefasern – Teil
3-61: Parameter von Steckverbindern mit physikalischem Kontakt für Fasern mit 50 µm
Kerndurchmesser – Nicht abgeschrägte zylindrische Vollzirkoniumdioxid- Ferrulen mit
2,5 mm und 1,25 mm Durchmesser für Referenzanschlussanwendung (IEC 63267-3-
61:2025)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques des
connecteurs fibroniques pour fibres multimodales améliorées en macrocourbures - Partie
3-61: Paramètres de connexion des fibres d’un diamètre de cœur de 50 µm en contact
physique - Ferrules cylindriques non inclinées en zircone pleine de 2,5 mm et 1,25 mm
de diamètre, pour les applications de connexion de référence (IEC 63267-3-61:2025)
Ta slovenski standard je istoveten z: EN IEC 63267-3-61:2025
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 63267-3-61
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2025
ICS 33.180.20 Supersedes EN IEC 61755-6-2:2018
English Version
Fibre optic interconnecting devices and passive components -
Fibre optic connector optical interfaces for enhanced macrobend
multimode fibres - Part 3-61: Connector parameters of physically
contacting 50 µm core diameter fibres - Non-angled 2,5 mm and
1,25 mm diameter cylindrical full zirconia ferrules for reference
connection applications
(IEC 63267-3-61:2025)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Interfaces optiques des connecteurs Bauteile - Optische Schnittstellen von Lichtwellenleiter-
fibroniques pour fibres multimodales améliorées en Steckverbindern für verbesserte Makrobend-
macrocourbures - Partie 3-61: Paramètres de connexion Multimodefasern - Teil 3-61: Parameter von
des fibres d'un diamètre de coeur de 50 µm en contact Steckverbindern mit physikalischem Kontakt für Fasern mit
physique - Férules cylindriques non inclinées en zircone 50 µm Kerndurchmesser - Nicht abgeschrägte zylindrische
plein de 2,5 mm et 1,25 mm de diamètre, pour les Vollzirkoniumdioxid- Ferrulen mit 2,5 mm und 1,25 mm
applications de connexion de référence Durchmesser für Referenzanschlussanwendung
(IEC 63267-3-61:2025) (IEC 63267-3-61:2025)
This European Standard was approved by CENELEC on 2025-07-30. 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63267-3-61:2025 E
European foreword
The text of document 86B/5030/FDIS, future edition 1 of IEC 63267-3-61, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 63267-3-61:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-08-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-08-31
document have to be withdrawn
This document supersedes EN IEC 61755-6-2:2018 and all of its amendments and corrigenda (if any).
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 63267-3-61:2025 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 61300-3-47 NOTE Approved as EN 61300-3-47
IEC 61754 (series) NOTE Approved as EN 61754 (series)
IEC 63267-2-1 NOTE Approved as EN IEC 63267-2-1
IEC 63267-2-2 NOTE Approved as EN IEC 63267-2-2
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-2-10 - Optical fibres - Part 2-10: Product EN IEC 60793-2-10 -
specifications - Sectional specification for
category A1 multimode fibres
IEC 61300-3-4 - Fibre optic interconnecting devices and EN IEC 61300-3-4 -
passive components - Basic test and
measurement procedures - Part 3-4:
Examinations and measurements -
Attenuation
IEC 61300-3-42 - Fibre optic interconnecting devices and EN 61300-3-42 -
passive components - Basic test and
measurement procedures - Part 3-42:
Examinations and measurements -
Attenuation of single mode alignment
sleeves and or adaptors with resilient
alignment sleeves
IEC 63267-1 - Fibre optic interconnecting devices and EN IEC 63267-1 -
passive components - Fibre optic
connector optical interfaces - Part 1:
Enhanced macro bend loss multimode 50
µm core diameter fibres - General and
guidance
IEC 63267-3-61 ®
Edition 1.0 2025-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components - Fibre optic
connector optical interfaces for enhanced macrobend multimode fibres -
Part 3-61: Connector parameters of physically contacting 50 μm core diameter
fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia
ferrules for reference connection applications
Dispositifs d'interconnexion et composants passifs fibroniques - Interfaces
optiques des connecteurs fibroniques pour fibres multimodales améliorées en
macrocourbures -
Partie 3-61: Paramètres de connexion des fibres d’un diamètre de cœur de 50
μm en contact physique - Férules cylindriques non inclinées en zircone plein de
2,5 mm et 1,25 mm de diamètre, pour les applications de connexion de référence
ICS 33.180.20 ISBN 978-2-8327-0505-6
IEC 63267-3-61:2025-06(en-fr)
IEC 63267-3-61:2025 © IEC 2025
CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Attenuation grade . 5
5 Description . 5
6 Criteria for a fit within the reference performance grade . 6
6.1 Geometry of reference plug after termination . 6
6.2 Use of selected fibre in reference-grade connectors . 8
7 Reference adapter . 9
Annex A (informative) Attenuation test limits of reference grade R connectors to
m1
grade B connectors . 10
m
A.1 General . 10
A.2 Performance grade B test limit against R reference connector . 10
m m1
A.3 Calculated attenuation of random mated Grade R reference connections . 10
m1
Annex B (normative) Maximum allowed spherical fibre undercut . 12
Bibliography . 14
Figure 1 – Geometrical requirements for fibre core location after termination relative to
the ferrule axis and the connector plug key . 6
Figure 2 – Interface dimensions for PC ferrule . 7
Figure A.1 – Calculated attenuation of random mated Grade R reference connectors . 11
m1
Figure B.1 – Allowable undercut as a function of endface radius and apex offset –
4,9 N minimum contact force . 13
Figure B.2 – Allowable undercut as a function of end face radius and apex offset –
2,9 N minimum contact force . 13
Table 1 – Multimode attenuation grade at 850 nm . 5
Table 2 – Optical interface parameter values for 2,5 mm diameter PC ferrules for
multimode reference connectors grade R . 8
m1
Table 3 – Optical interface parameter values for 1,25 mm diameter PC ferrules for
multimode reference connectors grade R . 8
m1
Table A.1 – Performance grade test limits at 850 nm . 10
IEC 63267-3-61:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Fibre optic interconnecting devices and passive components - Fibre optic
connector optical interfaces for enhanced macrobend multimode fibres -
Part 3-61: Connector parameters of physically contacting 50 μm core
diameter fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical
full zirconia ferrules for reference connection applications
FOREWORD
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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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
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