Fibre optic connector interfaces - Part 2: Type BFOC/2,5 connector family

Defines the standard interface dimensions for type BFOC/2,5 family of connectors which is a single position plug connector characterized by a 2,5 mm nominal ferrule diameter.

Steckgesichter von Lichtwellenleiter-Steckverbindern - Teil 2: Bauart BFOC/2,5 Steckverbinderfamilie

Interfaces de connecteurs pour fibres optiques - Partie 2: Famille de connecteurs de type BFOC/2,5

Définit les dimensions d'interfaces normalisées pour la famille des connecteurs de type BFOC/2,5 qui sont composés d'une fiche de connecteur monovoie, caractérisée par une ferrule d'un diamètre nominal de 2,5 mm.

Fibre optic connector interfaces - Part 2: Type BFOC/2,5 connector family (IEC 1754-2:1996)

General Information

Status
Published
Publication Date
13-Jan-1997
Withdrawal Date
31-Aug-1997
Drafting Committee
IEC/SC 86B - IEC_SC_86B
Parallel Committee
IEC/SC 86B - IEC_SC_86B
Current Stage
6060 - Document made available - Publishing
Start Date
14-Jan-1997
Completion Date
14-Jan-1997

Relations

Effective Date
14-Jan-2025

Overview

EN 61754-2:1997 (also published as IEC 1754-2:1996) specifies the mechanical interface dimensions for the Type BFOC/2,5 family of fibre‑optic connectors. The standard defines a single‑position plug connector characterized by a 2.5 mm nominal ferrule diameter, a bayonet coupling nut, a ferrule spring loaded along the optical axis and a single male key to control orientation and rotation. EN 61754-2 ensures interchangeability and reliable mating between plugs and adaptors within the BFOC/2,5 family.

Key topics and technical requirements

  • Interface definitions: Two standard interfaces are defined
    • Interface 2‑1: Plug connector interface - bayonet coupling
    • Interface 2‑2: Adaptor interface - bayonet coupling
    • Interfaces 2‑1 and 2‑2 are intermateable.
  • Ferrule specification: Nominal ferrule diameter of 2.5 mm; ferrule end‑face geometry and related dimensions are provided.
  • Mechanical tolerances and dimensions: Detailed dimensional tables and tolerance grades for plug and adaptor components (reference parts, tolerance grade tables and post‑termination dimensions).
  • Spring and force requirements: Ferrule spring force limits are specified (note: ferrule force < 15 N when compressed to U minimum and > 7 N when compressed to U maximum).
  • Coupling behavior: Coupling ring must be free to rotate a minimum of 360°; maximum radial float of 0.5 mm allowed between coupling ring and plug body to aid coaxial alignment.
  • Alignment features and gauges: Resilient alignment sleeve requirements and gauge pin dimensions (for assessment of the alignment sleeve fit and insertion force).

Applications

  • Standardizing mechanical interfaces for telecommunications, data communications, and instrumentation equipment using 2.5 mm ferrule single‑position connectors.
  • Ensuring intermateability of connectors and adaptors across different manufacturers for patch panels, transceivers, enclosures and field cabling.
  • Use in product design, tooling, quality control, procurement and acceptance testing where mechanical interchangeability and repeatable mating are required.

Who uses this standard

  • Connector and adaptor manufacturers designing BFOC/2,5 components
  • Network equipment designers and systems integrators specifying physical connectors
  • Test laboratories and QA teams performing mechanical conformity checks
  • Procurement and standards officers ensuring compatibility across vendor products

Related standards

  • IEC 1754-2:1996 - original IEC publication equivalent to EN 61754-2:1997
  • Other parts of the EN/IEC 61754 series that define interfaces for different fibre‑optic connector families

Keywords: EN 61754-2:1997, BFOC/2.5, fibre optic connector interfaces, 2.5 mm ferrule, bayonet coupling, connector dimensions, IEC 1754-2, intermateable connector family.

Frequently Asked Questions

EN 61754-2:1997 is a standard published by CLC. Its full title is "Fibre optic connector interfaces - Part 2: Type BFOC/2,5 connector family". This standard covers: Defines the standard interface dimensions for type BFOC/2,5 family of connectors which is a single position plug connector characterized by a 2,5 mm nominal ferrule diameter.

Defines the standard interface dimensions for type BFOC/2,5 family of connectors which is a single position plug connector characterized by a 2,5 mm nominal ferrule diameter.

EN 61754-2:1997 is classified under the following ICS (International Classification for Standards) categories: 33.180.20 - Fibre optic interconnecting devices. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 61754-2:1997 has the following relationships with other standards: It is inter standard links to prEN IEC 61754-2:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 61754-2:1997 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fibre optic connector interfaces - Part 2: Type BFOC/2,5 connector family (IEC 1754-2:1996)Steckgesichter von Lichtwellenleiter-Steckverbindern -- Teil 2: Bauart BFOC/2,5 SteckverbinderfamilieInterfaces de connecteurs pour fibres optiques -- Partie 2: Famille de connecteurs de type BFOC/2,5Fibre optic connector interfaces -- Part 2: Type BFOC/2,5 connector family33.180.20Fibre optic interconnecting devicesICS:Ta slovenski standard je istoveten z:EN 61754-2:1997SIST EN 61754-2:1997en01-december-1997SIST EN 61754-2:1997SLOVENSKI
STANDARD
NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD1754-2Première éditionFirst edition1996-12Ó CEI 1996
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¾ Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucun procédé,électronique ou mécanique, y compris la photocopie et lesmicrofilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilizedin any form or by any means, electronic or mechanical,including photocopying and microfilm, without
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catalogueKInterfaces de connecteurs pour fibres optiques –Partie 2:Famille de connecteurs de type BFOC/2,5Fibre optic connector interfaces –Part 2:Type BFOC/2,5 connector familySIST EN 61754-2:1997

1754-2 © IEC:1996-- 3 –CONTENTSPageFOREWORD.5Clause1Scope.72Description.73Interfaces.7SIST EN 61754-2:1997

1754-2 © IEC:1996-- 5 –INTERNATIONAL ELECTROTECHNICAL COMMISSION_________FIBRE OPTIC CONNECTOR INTERFACES -Part 2: Type BFOC/2,5 connector familyFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the International Organizationfor Standardization (ISO) in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards, technical reports or guides and they are accepted by the National Committees in that sense.4)In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard
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