IEC 61754-4:2022/AMD1:2026

• Status: Published
• Publication Date: 18-Jun-2026
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: PPUB - Publication issued
• Start Date: 19-Jun-2026
• Completion Date: 21-Jul-2026

• Amends: IEC 61754-4:2022 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 4: Type SC connector family
• Effective Date: 20-Dec-2024

IEC 61754-4:2022/AMD1:2026 is Amendment 1 to the IEC standard for the Type SC connector family. Published by IEC, it updates the fibre optic connector interface specifications for SC plugs and related receptacles, with a focus on dimensions, grade characteristics, pin gauge details, and the normative references used to define them. Engineers, manufacturers, test labs, quality managers and buyers use it to specify and verify SC connector compatibility.

What does IEC 61754-4:2022/AMD1:2026 specify?

IEC 61754-4:2022/AMD1:2026 specifies updates to the fibre optic connector interface document for the Type SC connector family. The amendment revises the technical reference points that define how SC connector interfaces are built and checked in practice.

The document is organized as an amendment that updates Clause 2, several figures and tables, and the bibliography. The affected items include the simplex and duplex PC plug connector interfaces, the simplex and duplex angled PC plug connector interfaces, the simplex active device receptacle interface, and the pin gauge dimensions.

Part of the document	What it covers
Clause 2	Added normative references
Figure 1, Table 3, Table 4	Simplex PC plug connector interface and grade characteristics
Table 7	Pin gauge dimensions
Figure 4, Table 8, Table 9	Duplex PC plug connector interface and grade characteristics
Figures 6 and 7, Tables 12 and 13	Simplex and duplex angled PC plug connector interfaces
Table 17	Simplex active device receptacle interface for PC connector plug
Bibliography	References removed from the bibliography

What are the key requirements of IEC 61754-4:2022/AMD1:2026?

IEC 61754-4:2022/AMD1:2026 mainly updates which reference series control the connector parameters and revises several dimensions and grade entries. In practice, the amendment tells users which values now come from the IEC 61755-3 series or the IEC 63267-3 series.

Clause 2 and referenced parameter series

Clause 2 adds IEC 61755-3 (all parts) and IEC 63267-3 (all parts) as normative references. These series provide the connector parameter basis for the updated interface values, so designers and inspectors must use the correct series when checking compliance.

Simplex PC plug connector interface

The amendment replaces the simplex PC plug connector figure and updates Table 3 and Table 4. Several entries now point to the IEC 61755-3 series or IEC 63267-3 series, and grade A is marked as not specified at this time. For users, that means the simplex interface is now tied more directly to the applicable fibre parameter series rather than a single earlier reference.

Pin gauge dimensions

Table 7 updates the pin gauge finish requirement in row CK to a surface roughness value stated as Ra. This matters when measuring or procuring gauges, because the surface finish of the gauge can affect how accurately it checks connector parts.

Duplex PC plug connector interface

The duplex PC plug connector figure and Tables 8 and 9 are revised in the same general direction as the simplex version. The amendment also removes one table dimension entry and deletes a note, while grade A remains not specified and grades B to D are linked to the IEC 61755-3 series, with additional grade details tied to IEC 63267-3 series where noted. In practice, duplex connectors need to be checked against the revised geometry and grading logic, not the earlier wording.

Angled PC plug connector interfaces

Figures 6 and 7 and Tables 12 and 13 update the simplex and duplex angled PC plug connector interfaces. Table 13 also adds a dimension range for row DB. This is important for product compatibility because angled interfaces have their own geometry and cannot simply be assumed to follow the straight PC dimensions.

Simplex active device receptacle interface

Table 17 revises the maximum value in row P for the simplex active device receptacle interface for PC connector plug. Users designing active devices or receptacles need to apply the updated fit dimension when checking mechanical compatibility.

What terms does IEC 61754-4:2022/AMD1:2026 define?

• Type SC connector family - The connector family covered by this standard, used for fibre optic interconnecting devices and passive components.
• Simplex - A connector interface arrangement for one fibre path or one channel.
• Duplex - A connector interface arrangement for two fibre paths or two channels in one connector format.
• PC plug connector interface - The plug interface defined for the PC version of the SC connector family.
• Angled PC plug connector interface - A PC plug interface with angled geometry, defined separately from the straight version.
• Active device receptacle interface - The receptacle interface used for connecting to an active device with a PC connector plug.
• Grade - A classification used in the tables to distinguish interface characteristics and permitted parameter sets.

Who uses IEC 61754-4:2022/AMD1:2026?

IEC 61754-4:2022/AMD1:2026 is used by connector and component manufacturers, fibre optic product designers, test laboratories, quality managers, and procurement teams. They use it to specify SC connector interfaces, check dimensional compatibility, select the correct grade, and verify incoming parts or finished products against the same interface rules.

It is also useful to system integrators and buyers in fibre optic networks who need to confirm that SC connectors, plugs, receptacles and gauges are aligned across suppliers.

What changed in IEC 61754-4:2022/AMD1:2026 from the previous edition?

This amendment updates IEC 61754-4:2022 by:

• adding IEC 61755-3 (all parts) and IEC 63267-3 (all parts) to the normative references
• revising the simplex PC plug connector figure, dimensions and grade table
• revising the pin gauge roughness requirement
• revising the duplex PC plug connector figure, dimensions and grade table
• updating the simplex and duplex angled PC plug connector interface figures and tables
• changing one dimension in the simplex active device receptacle interface table
• deleting IEC 61755-3-1, IEC 61755-3-2 and IEC 61755-6-1 from the bibliography

Which standards are used with IEC 61754-4:2022/AMD1:2026?

IEC 61754-4:2022/AMD1:2026 uses these normative references:

• IEC 61755-3 (all parts) - provides connector parameters for dispersion unshifted single-mode physically contacting fibres.
• IEC 63267-3 (all parts) - provides connector parameters for physically contacting 50 µm core diameter fibres used with enhanced macro bend multimode fibres.

These references supply the parameter series that the amended interface tables now rely on.

What does the IEC 61754-4:2022/AMD1:2026 document contain?

IEC 61754-4:2022/AMD1:2026 contains replacement figures and revised tables for SC connector interface geometry. It includes the simplex and duplex PC plug connector interfaces, the angled PC plug connector interfaces, the pin gauge dimensions, and the simplex active device receptacle interface.

It also contains updated grade characteristics tables that link interface grades to the IEC 61755-3 series and IEC 63267-3 series. For design and verification work, these are the parts that control fit, interchangeability, and inspection of SC connector hardware.

IEC 61754-4 ®
Edition 3.0 2026-06
NORME
INTERNATIONALE
AMENDEMENT 1
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces de
connecteurs fibroniques -
Partie 4: Famille de connecteurs de type SC
ICS 33.180.20  ISBN 978-2-8327-1329-7

IEC 61754-4:2022-02/AMD1:2026-06(fr)

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____________
Dispositifs d'interconnexion et composants passifs fibroniques -
Interfaces de connecteurs fibroniques -
Partie 4: Famille de connecteurs de type SC

AMENDEMENT 1
AVANT-PROPOS
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IEC 61754-4 ®
Edition 3.0 2026-06
INTERNATIONAL
STANDARD
AMENDMENT 1
Fibre optic interconnecting devices and passive components - Fibre optic
connector interfaces -
Part 4: Type SC connector family
ICS 33.180.20  ISBN 978-2-8327-1329-7

IEC 61754-4:2022-02/AMD1:2026-06(en)

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Fibre optic interconnecting devices and passive components -
Fibre optic connector interfaces -
Part 4: Type SC connector family

AMENDMENT 1
FOREWORD
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