SIST EN IEC 61754-6:2022/kFprA1:2026

• Status: Not Published
• Public Enquiry End Date: 31-Dec-2025
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 17-Aug-2026
• Due Date: 05-Oct-2026
• Completion Date: 21-Aug-2026
• Ref Project: EN IEC 61754-6:2022/FprA1:2026 - Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family

• Amends: SIST EN IEC 61754-6:2022 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family (IEC 61754-6:2022)
• Effective Date: 14-Jan-2025

Overview

SIST EN IEC 61754-6:2022/kFprA1:2026 is an international standard from the SIST (Slovenian Institute for Standardization) that specifies the interface dimensions, grades, and key parameters for the type MU fibre optic connector family. The MU connector is a compact, high-density fibre optic interconnect widely used in telecommunication and data transmission networks where space efficiency and reliable optical performance are critical. This amendment (A1) provides updated table references, interface clarifications, measurement standards, and dimensional recommendations to align with evolving connector and fibre optic requirements.

Key Topics

• Fibre Optic Connector Interfaces: The standard focuses on physical interface parameters for MU connectors, detailing essential dimensions and form factors for simplex and duplex configurations.
• Connector Grades and Parameters: References to connector performance grades (A, B, C, D) are updated, aligning grade parameters with other international standards (e.g., IEC 61755-3 series, IEC 63267-3 series). Grade A is currently not specified while other grades refer to these series for minimum and maximum values and qualitative guidance.
• Dimensional Specifications: Detailed tables outline critical measurements for various interface types, such as simplex, 4.5 mm and 6.25 mm duplex, and horizontal duplex plug connectors. Parameters include ferrule angles, endface characteristics, mechanical datum targets, compressive force tolerances, and allowed radii or chamfers.
• Reference Updates and Harmonization: The amendment brings table references and notes in line with more recent or parallel IEC standards, fostering consistency across the global fibre optic standardization landscape.
• Measurement and Testing: Key measurement techniques for ferrule compression force and endface quality are referenced, ensuring interoperability through standards such as IEC 61300-3-22.

Applications

• Telecommunications Infrastructure: Compact size and precise standardization make MU connectors ideal for telecom switch gear, distribution panels, and high-density central offices.
• Data Centers and Enterprise Networks: MU fibre optic connectors are well-suited for server farms, high-speed backbone cabling, and patch panels, supporting efficient space usage and reliable optical performance for gigabit and higher-speed networks.
• Local Area Networks (LANs): MU connectors enable quick, secure, and reliable fibre connections in both commercial and industrial LAN environments.
• High-Density Equipment: Any application requiring robust fibre optic connection within limited footprint, such as FTTH (Fibre to the Home), medical imaging, and instrumentation, benefits from the standardized MU interface.

Related Standards

MU connectors and their interface standards are informed and complemented by several related documents in the fibre optic standards field:

• IEC 61755-3 series: Defines connector parameters for dispersion-unshifted single-mode physically contacting fibres.
• IEC 63267-3 series: Details connector parameters for physically contacting enhanced macro bend multimode fibres.
• IEC 61300-3-22: Outlines methods for measuring ferrule compression force, essential for mechanical qualifications in connector assemblies.
• IEC 61754 series: Covers additional fibre optic connector family interfaces beyond the type MU, supporting interoperability and consistent quality within the industry.

Staying up to date with SIST EN IEC 61754-6 and its amendments is crucial for manufacturers, network designers, and quality assurance engineers working in optical connectivity. Adherence ensures component compatibility, network reliability, and international market access for fibre optic equipment.

SLOVENSKI STANDARD
SIST EN IEC 61754-6:2022/oprA1:2025
01-december-2025
Optični spojni elementi in pasivne komponente - Vmesniki za optične konektorje -
6. del: Konektorska družina vrste MU - Dopolnilo A1
Fibre optic interconnecting devices and passive components - Fibre optic connector
interfaces - Part 6: Type MU connector family
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Steckgesichter von
Lichtwellenleiter-Steckverbindern - Teil 6: Steckverbinderfamilie der Bauart MU
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces de
connecteurs fibroniques - Partie 6: Famille de connecteurs de type MU
Ta slovenski standard je istoveten z: EN IEC 61754-6:2022/prA1:2025
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
SIST EN IEC 61754-6:2022/oprA1:2025 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN IEC 61754-6:2022/oprA1:2025

SIST EN IEC 61754-6:2022/oprA1:2025
86B/5125/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61754-6/AMD1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-10-17 2026-01-09
SUPERSEDES DOCUMENTS:
86B/4997/CD, 86B/5034A/CC
IEC SC 86B : FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS
SECRETARIAT: SECRETARY:
Japan Mr Ryo Koyama
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic
connector interfaces - Part 6: Type MU connector family

PROPOSED STABILITY DATE: 2032
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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SIST EN IEC 61754-6:2022/oprA1:2025
IEC CDV 61754-6/AMD1 © IEC 2025
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
3 _____________
5 IEC 61754-6
6 Edition 3.0 2022-02
7 Fibre optic interconnecting devices and passive components – Fibre optic connector
8 interfaces - Part 6: Type MU connector family
9 AMENDMENT 1
10 2 Normative references
11 Add the following references:
12 IEC 61755-3 (all parts), Fibre optic interconnecting devices and passive components - Connector optical interfaces:
13 Connector parameters of dispersion unshifted single-mode physically contacting fibres
14 IEC 63267-3 (all parts), Fibre optic interconnecting devices and passive components – Connector optical interfaces
15 for enhanced macro bend multimode fibres: Connector parameters of physically contacting 50 µm core diameter
16 fibres
18 5 Interfaces
19 Table 5 – Dimensions of the simplex plug connector interface
20 In footnote b, replace “L, M and V” with “I, P, Q and R”.
22 Table 6 – Grade of the simplex plug connector
23 In the row for grade A, replace the content in the second and third column with “Grade not
24 specified at this time”.
25 In the rows for grades B to D, replace the content in the second and third column with “Refer to
26 IEC 61755-3 series”.
27 In the rows for grades B and C , replace the minimum and maximum values or the text with
m m
28 “Refer to IEC 63267-3 series”.
29 Delete note b “See IEC 61755-6-1 for guidance”.
31 Table 7 – Dimensions of the 4,5 mm duplex plug connector interface
32 In footnote b, replace “L, M and V” with “I, P, Q and R”.
SIST EN IEC 61754-6:2022/oprA1:2025
IEC CDV 61754-6/AMD1 © IEC 2025
35 Table 8 – Grade of the 4,5 mm duplex plug connector
36 In the row for grade A, replace the content in the second and third column with “Grade not
37 specified at this time”.
38 In the rows for grades B to D, replace the content in the second and third column with “Refer to
39 IEC 61755-3 series”.
40 In the rows for grades B and C , replace the minimum and maximum values or the text with
m m
41 “Refer to IEC 63267-3 series”.
42 Delete note b “See IEC 61755-6-1 for guidance”.
44 Table 11 – Pin gauge dimensions
45 In the last column, row LK, replace “grade N4 (0,2 μm radius)” with “Ra: ≤0.000 2”.
47 Table 17 – Grade of the plug connector
48 In the row for grade A, replace the content in the second and third column with “Grade not
49 specified at this time”.
50 In the rows for grades B to D, replace the content in the second and third column with “Refer to
51 IEC 61755-3 series”.
52 In the rows for grades B and C , replace the minimum and maximum values or the text with
m m
53 “Refer to IEC 63267-3 series”.
54 Delete note b “See IEC 61755-6-1 for guidance”.
56 Figure 8 – Sleeve holder int
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