EN IEC 61754-6:2022/FprA1:2026
(Amendment)Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family
- Status
- Not Published
- Publication Date
- 20-Dec-2026
- Current Stage
- 5060 - Voting results sent to TC, SR - Formal Approval
- Start Date
- 18-Sep-2026
- Completion Date
- 18-Sep-2026
EN IEC 61754-6:2022/FprA1:2026 is Amendment 1 to IEC 61754-6 for the Type MU connector family. It updates the fibre optic connector interface requirements used to specify compatible MU connectors, especially their dimensions, grades, and the reference standards behind those grades. The document is written for designers, manufacturers, test labs, and quality teams that need a common interface definition for MU connector hardware.
What does EN IEC 61754-6:2022/FprA1:2026 specify?
EN IEC 61754-6:2022/FprA1:2026 is an amendment to the existing MU connector interface part, not a standalone product specification. It revises Clause 2, Clause 5, Figure 8, several interface tables, and the bibliography.
| Document part | What it covers |
|---|---|
| Clause 2 | Normative references |
| Clause 5 | Interfaces |
| Tables 5, 7, 39, 40, 46 | Dimensions of simplex, 4.5 mm duplex, APC, and horizontal duplex plug connector interfaces |
| Tables 6, 8, 17, 43, 47 | Grades for the corresponding plug connector interfaces |
| Table 11 | Pin gauge dimensions |
| Tables 41, 42 | 6.25 mm duplex plug connector interface dimensions |
| Figure 8 | Sleeve holder interface |
The amendment keeps the document focused on connector interface definition. In practice, that means the reader uses it to check mechanical compatibility, interface geometry, and the related references that support grading and inspection.
What are the key requirements of EN IEC 61754-6:2022/FprA1:2026?
The amendment makes several targeted technical changes that matter for design drawings, inspection methods, and supplier specifications.
Clause 2 adds new normative references to IEC 61755-3 (all parts) and IEC 63267-3 (all parts). This means the grade-related parts of the MU interface now point to those connector optical interface families, so users must follow the referenced series when specifying optical performance.
Tables 5, 7, 39, 40, and 46 update footnote references from “L, M and V” to “I, P, Q and R”. In practice, this aligns the connector drawings with the correct datum references for the simplex, duplex, APC, and horizontal duplex interfaces.
Tables 6, 8, 17, 43, and 47 revise the grade information. Grade A is marked as not specified at this time, grades B to D point to the IEC 61755-3 series, and grades B and C point to the IEC 63267-3 series. The notes that pointed to IEC 61755-6-1 are removed. For users, this shifts grade selection away from local notes and toward the referenced IEC families.
Table 11 changes the pin gauge requirement for row LK to a surface roughness statement, Ra: ≤0.000 2. That matters for tooling and inspection because the gauge finish is part of the conformance check.
Tables 41 and 42 revise the 6.25 mm duplex plug connector interface. They retain detailed dimensional limits and remarks about the delatch housing position, ferrule movement, and the measurement of compression force according to IEC 61300-3-22. In practice, this is the part to use when checking mated connector behavior and axial loading.
Table 42 adds a dome eccentricity limit for the spherically polished ferrule endface. This gives manufacturers and inspectors a direct geometry check on endface quality.
Figure 8 is replaced for the sleeve holder interface. That affects interface drawings, tooling, and any internal specifications copied from the standard.
Table 39 and Table 40 replace “EA” with “EC” in footnotes. The APC notes therefore use the updated angle reference in the angled-endface interface tables.
What terms does EN IEC 61754-6:2022/FprA1:2026 define?
- Simplex plug connector interface - the interface for a single MU plug; the amendment gives its dimensions and grade references in Tables 5 and 6.
- 4.5 mm duplex plug connector interface - the duplex MU interface with a 4.5 mm form factor; Tables 7 and 8 apply to it.
- 6.25 mm duplex plug connector interface - the duplex MU interface with a 6.25 mm form factor; Tables 41 to 43 cover it.
- Horizontal duplex plug connector interface - a duplex interface arranged horizontally; Tables 46 and 47 apply to it.
- Delatch housing - the movable housing that can shift right or left between connected and disconnected states.
- Ferrule - the optical alignment part whose movement, compression, and endface quality are addressed in the interface tables.
- Optical datum target / mechanical datum target - the two reference positions used in the compression-force and axial-position remarks.
Who uses EN IEC 61754-6:2022/FprA1:2026?
EN IEC 61754-6:2022/FprA1:2026 is used by connector manufacturers, fibre optic component designers, test laboratories, and quality assurance teams. It is also useful for buyers and specifiers who need to confirm that MU connector interfaces match across suppliers.
In practice, engineers use it for drawings and mating compatibility checks. Quality teams use it for incoming inspection, gauge selection, and surface or geometry verification. Procurement teams use it to write clear interface requirements for MU-compatible hardware.
What changed in EN IEC 61754-6:2022/FprA1:2026 from the previous edition?
EN IEC 61754-6:2022/FprA1:2026 is Amendment 1 to IEC 61754-6 Edition 3.0 (2022-02). The amendment:
- adds IEC 61755-3 (all parts) and IEC 63267-3 (all parts) to the normative references
- updates multiple interface tables and grade tables
- replaces Figure 8
- changes pin gauge and APC-related notes
- deletes the IEC 61755-6-1 bibliography reference
Which standards are used with EN IEC 61754-6:2022/FprA1:2026?
- IEC 61755-3 (all parts) - referenced for grade-related connector optical interface parameters.
- IEC 63267-3 (all parts) - referenced for enhanced macro bend multimode fibre connector parameters.
- IEC 61755-3-2 - used as the reference in Table 41 for part of the 6.25 mm duplex interface geometry.
- IEC 63267-1 - named in Table 43 for the 6.25 mm duplex plug connector grade note.
- IEC 61300-3-22 - gives the measurement method for compression force.
What does the EN IEC 61754-6:2022/FprA1:2026 document contain?
This amendment is mainly a set of edits to the base MU connector interface part. It contains revised dimension tables, revised grade tables, updated footnotes, and one replaced figure. The technical content is concentrated in Clause 5 and the associated tables, where the document defines connector geometry, grade references, gauge details, and APC-related notes.
For users, the useful part is the exact interface data: it supports drawing checks, tooling, inspection, and supplier-to-supplier interchangeability reviews.
Relations
- Effective Date
- 14-Jan-2025
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Frequently Asked Questions
EN IEC 61754-6:2022/FprA1:2026 is a draft published by CLC. Its full title is "Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family". This standard covers: Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family
Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 6: Type MU connector family
EN IEC 61754-6:2022/FprA1:2026 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 IEC 61754-6:2022/FprA1:2026 has the following relationships with other standards: It is inter standard links to EN IEC 61754-6:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61754-6:2022/FprA1:2026 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)
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
permission in writing from IEC.
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
...