EN IEC 63267-3-81:2025
(Main)Fibre optic interconnecting devices and passive components - Connector optical interfaces for enhanced macro bend multimode fibre - Part 3-81: Connector parameters of physically contacting 50 μm core diameter fibres - Non-angled polyphenylene sulphide rectangular ferrules with a single row of 12, 8, 4, or 2 fibres for reference connector applications
Fibre optic interconnecting devices and passive components - Connector optical interfaces for enhanced macro bend multimode fibre - Part 3-81: Connector parameters of physically contacting 50 μm core diameter fibres - Non-angled polyphenylene sulphide rectangular ferrules with a single row of 12, 8, 4, or 2 fibres for reference connector applications
IEC 63267-3-81: 2025 defines the dimensional limits of an optical interface for reference connectors with rectangular ferrules necessary to meet specific requirements for fibre-to-fibre interconnection of non-angled polished multimode reference connectors with rectangular ferrules intended to be used for attenuation measurements as defined in IEC 63267‑2‑2. Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic interface standards.One grade of reference connector is defined in this document. The reference connector is terminated to restricted IEC 60793-2-10 A1-OM2b to A1-OM5b fibre at 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 two reference connectors, and therefore to limit the variation in measured attenuation between randomly chosen reference connectors when mated with connectors in the field or factory.
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Optische Schnittstellen von Lichtwellenleiter-Steckverbindern für verstärkte Makrobend-Mehrmodenfasern - Teil 3-81: Parameter von Steckverbindern mit Fasern mit 50 µm Kerndurchmesser mit physikalischem Kontakt - Nicht abgeschrägte rechteckige Polyphenylensulfid- Ferrule mit einer einzigen Reihe von 12, 8, 4 oder 2 Fasern für die Anwendung mit Referenzsteckverbindern
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques des connecteurs pour fibres multimodales améliorées en macrocourbures - Partie 3-81: Paramètres de connexion des fibres d’un diamètre de coeur de 50 μm en contact physique - Ferrules rectangulaires non inclinées en polysulfure de phénylène avec une seule rangée de 12, 8, 4 ou 2 fibres, pour les applications de connecteurs de référence
IEC 63267-3-81: définit les limites dimensionnelles d’une interface optique pour les connecteurs de référence à ferrule rectangulaire, qui sont nécessaires pour satisfaire aux exigences particulières des interconnexions fibre à fibre des connecteurs de référence multimodaux polis non inclinés à ferrule rectangulaire, destinés à être utilisés pour les mesures d’affaiblissement telles qu’elles sont définies dans l’IEC 63267-2-2. Les dimensions et les caractéristiques des ferrules sont spécifiées dans les normes d’interfaces fibroniques de la série IEC 61754. Le présent document définit une classe de connecteur de référence. 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 différentes paires de connecteurs de référence, et donc pour limiter les écarts au niveau de l’affaiblissement mesuré entre des connecteurs de référence choisis de manière aléatoire, lorsqu’ils sont accouplés à des connecteurs sur le terrain ou en usine.
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za izboljšana mnogorodna optična vlakna z makro upogibom - 3-81. del: Parametri konektorjev s fizičnim stikom za vlakna s premerom jedra 50 µm - Brezkotna pravokotna tulka iz polifenilen sulfida z eno vrsto 12, 8, 4 ali 2 vlaken za uporabo referenčnih konektorjev (IEC 63267-3-81:2025)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za
izboljšana mnogorodna optična vlakna z makro upogibom - 3-81. del: Parametri
konektorjev s fizičnim stikom za vlakna s premerom jedra 50 µm - Brezkotna
pravokotna tulka iz polifenilen sulfida z eno vrsto 12, 8, 4 ali 2 vlaken za uporabo
referenčnih konektorjev (IEC 63267-3-81:2025)
Fibre optic interconnecting devices and passive components - Connector optical
interfaces for enhanced macro bend multimode fibre - Part 3-81: Connector parameters
of physically contacting 50 μm core diameter fibres - Non-angled polyphenylene sulphide
rectangular ferrules with a single row of 12, 8, 4, or 2 fibres for reference connector
applications (IEC 63267-3-81:2025)
Lichtwellenleiter – Verbindungselemente und passive Bauteile – Optische Schnittstellen
von Lichtwellenleiter-Steckverbindern für verstärkte Makrobend-Mehrmodenfasern – Teil
3-81: Parameter von Steckverbindern mit Fasern mit 50 µm Kerndurchmesser mit
physikalischem Kontakt – Nicht abgeschrägte rechteckige Polyphenylensulfid- Ferrule
mit einer einzigen Reihe von 12, 8, 4 oder 2 Fasern für die Anwendung mit
Referenzsteckverbindern (IEC 63267-3-81:2025)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques des
connecteurs pour fibres multimodales améliorées en macrocourbures - Partie 3-81:
Paramètres de connexion des fibres d’un diamètre de cœur de 50 µm en contact
physique - Ferrules rectangulaires non inclinées en polysulfure de phénylène avec une
seule rangée de 12, 8, 4 ou 2 fibres, pour les applications de connecteurs de référence
(IEC 63267-3-81:2025)
Ta slovenski standard je istoveten z: EN IEC 63267-3-81:2025
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 63267-3-81
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2025
ICS 33.180.20
English Version
Fibre optic interconnecting devices and passive components -
Connector optical interfaces for enhanced macro bend
multimode fibre - Part 3-81: Connector parameters of physically
contacting 50 µm core diameter fibres - Non-angled
polyphenylene sulphide rectangular ferrules with a single row of
12, 8, 4, or 2 fibres for reference connector applications
(IEC 63267-3-81:2025)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Interfaces optiques des connecteurs pour Bauteile - Optische Schnittstellen von Lichtwellenleiter-
fibres multimodales améliorées en macrocourbures - Partie Steckverbindern für verstärkte Makrobend-
3-81: Paramètres de connexion des fibres d'un diamètre de Mehrmodenfasern - Teil 3-81: Parameter von
coeur de 50 µm en contact physique - Ferrules Steckverbindern mit Fasern mit 50 µm Kerndurchmesser
rectangulaires non inclinées en polysulfure de phénylène mit physikalischem Kontakt - Nicht abgeschrägte
avec une seule rangée de 12, 8, 4 ou 2 fibres, pour les rechteckige Polyphenylensulfid- Ferrule mit einer einzigen
applications de connecteurs de référence Reihe von 12, 8, 4 oder 2 Fasern für die Anwendung mit
(IEC 63267-3-81:2025) Referenzsteckverbindern
(IEC 63267-3-81:2025)
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 63267-3-81:2025 E
European foreword
The text of document 86B/5037/FDIS, future edition 1 of IEC 63267-3-81, 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 63267-3-81:2025.
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
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 63267-3-81:2025 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 61754-5 NOTE Approved as EN 61754-5
IEC 61754-25 NOTE Approved as EN 61754-25
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 61300-3-27 - Fibre optic interconnecting devices and EN 61300-3-27 -
passive components - Basic test and
measurement procedures - Part 3-27:
Examinations and measurements -
Measurement method for the hole location
of a multiway connector plug
IEC 61300-3-30 - Fibre optic interconnecting devices and EN IEC 61300-3-30 -
passive components - Basic test and
measurement procedures - Part 3-30:
Examinations and measurements -
Endface geometry of rectangular ferrule
IEC 61754-5 2005 Fibre optic connector interfaces - Part 5: EN 61754-5 2005
Type MT connector family
IEC 61754-7-1 2014 Fibre optic interconnecting devices and EN 61754-7-1 2014
passive components - Fibre optic
connector interfaces - Part 7-1: Type MPO
connector family - One fibre row
IEC 61754-18 2001 Fibre optic connector interfaces - Part 18: EN 61754-18 2002
Type MT-RJ connector family
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 63267-3-81 ®
Edition 1.0 2025-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components - Connector optical
interfaces for enhanced Macro bend multimode fibre -
Part 3-81: Connector parameters of physically contacting 50 μm core diameter
fibres - Non-angled polyphenylene sulphide rectangular ferrules with a single
row of 12, 8, 4, or 2 fibres for reference connector applications
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces
optiques des connecteurs pour fibres multimodales améliorées en
macrocourbures -
Partie 3-81: Paramètres de connexion des fibres d’un diamètre de cœur de 50
µm en contact physique - Ferrules rectangulaires non inclinées en polysulfure
de phénylène avec une seule rangée de 12, 8, 4 ou 2 fibres, pour les applications
de connecteurs de référence
ICS 33.180.20 ISBN 978-2-8327-0504-9
IEC 63267-3-81:2025-06(en-fr)
IEC 63267-3-81:2025 © IEC 2025
CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Reference grade variants and fibre numbering conventions . 5
5 Attenuation grade . 6
6 Description . 6
7 Reference interface parameters . 7
7.1 Geometry of reference plug after termination . 7
7.2 Use of selected fibre in multimode reference-grade connectors . 14
Annex A (informative) Attenuation test limit of reference connectors mated to grade
B connectors . 15
m
A.1 General . 15
A.2 Performance grade B test limit against reference connectors . 15
m
A.3 Attenuation grade of reference connectors . 15
Bibliography . 17
Figure 1 – Fibre numbering conventions . 5
Figure 2 – Interface dimensions related to lateral and angular offset . 8
Figure 3 – Alignment pin . 8
Figure 4 – Interface dimensions related to longitudinal offset (physical contact) . 10
Figure A.1 – Calculated attenuation of random mated Grade R reference
m12
connectors . 16
Table 1 – Reference connector optical interface variant information . 5
Table 2 – Multimode reference attenuation grade at 850 nm . 6
Table 3 – Optical interface dimensions related to lateral and angular offset for optical
interface variant R . 9
m2
Table 4 – Optical interface dimensions related to lateral and angular offset for optical
interface variants R , R , and R . 9
m12 m8 m4
Table 5 – Optical interface end face geometry dimensions related to physical contact
for optical interface variant R . 11
m2
Table 6 – Optical interface end face geometry dimensions related to physical contact
for optical interface variant R . 12
m4
Table 7 – Optical interface end face geometry dimensions related to physical contact
for optical interface variant R . 13
m8
Table 8 – Optical interface end face geometry dimensions related to physical contact
for optical interface variant R . 14
m12
Table A.1 – Performance grade test limits at 850 nm . 15
IEC 63267-3-81:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Fibre optic interconnecting devices and passive components - Connector
optical interfaces for enhanced macro bend multimode fibre -
Part 3-81: Connector parameters of physically contacting 50 μm core
diameter fibres - Non-angled polyphenylene sulphide rectangular ferrules
with a single row of 12, 8, 4, or 2 fibres for reference connector
applications
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC Nationa
...
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