EN IEC 63267-3-61 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM August 2025 ICS 33.180.20 Supersedes ENIEC 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 connectionapplications (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 ameliorees en Steckverbindern fur verbesserte Makrobend- macrocourbures - Partie 3-61: Parametres de connexion Multimodefasern - Teil 3-61: Parameter von Steckverbindern mit physikalischem Kontakt fur Fasern mit des fibres d'un diametre de coeur de 50 μm en contact physique - Ferules cylindriques non inclinees en zircone 50 μm Kerndurchmesser - Nicht abgeschragte zylindrische plein de 2,5 mm et 1,25 mm de diametre, pour les Vollzirkoniumdioxid- Ferrulen mit 2,5 mm und 1,25 mm applications de connexion de reference (IEC 63267-3- Durchmesser fur Referenzanschlussanwendung (IEC 61:2025) 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 orto 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 notifiedi 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, Turkiye and the United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comite Europeen de Normalisation Electrotechnique Europaisches Komitee fir Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels Ref. No. EN IEC 63267-3-61:2025 E EN IEC63267-3-61:2025 (E) European foreword The text of document 86B/5030/FDIS, future edition 1 of IEC 63267-3-61, prepared by SC 86B "Fibre the IEC-CENELEC parallelvote and approved by CENELEC as ENIEC 63267-3-61:2025 The following dates are fixed: latest date by which thedocument 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 conflictingwiththe (dow)2028-08-31 documenthavetobewithdrawn 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. Endorsementnotice 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