IEC 61754-4:2022

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

IEC 61754-4:2022 is available as IEC 61754-4:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61754-4:2021 specifies the standard interface dimensions for type SC family of connectors. This third edition cancels and replaces the second edition published in 2013 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the test method IEC 61300-3-22 for the compression force of the ferrule was added;
- Annex A (informative) with cut out dimension requirements for testing the strength of mounted adaptors was added.

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

IEC 61754-4:2022 est disponible sous forme de IEC 61754-4:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 61754-4:2022 spécifie les dimensions d'interfaces normalisées pour la famille de connecteurs de type SC. La présente troisième édition annule et remplace la deuxième édition publiée en 2013, et constitue une révision technique. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de la méthode d'essai de l'IEC 61300-3-22 sur la force de compression de la férule;
- ajout de l'Annexe A (informative) avec les exigences relatives aux dimensions des découpes pour réaliser les essais de résistance des raccords montés.

General Information

• Status: Published
• Publication Date: 27-Feb-2022
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: PPUB - Publication issued
• Completion Date: 28-Feb-2022

Standards Content (sample)

IEC 61754-4
Edition 3.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 4: Type SC connector family
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs fibroniques –
Partie 4: Famille de connecteurs de type SC
IEC 61754-4:2022-02(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61754-4
Edition 3.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 4: Type SC connector family
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs fibroniques –
Partie 4: Famille de connecteurs de type SC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-1077-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61754-4:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Description ...................................................................................................................... 6

5 Interfaces ........................................................................................................................ 7

Annex A (informative) Panel dimensions .............................................................................. 35

A.1 General ................................................................................................................. 35

A.2 Simplex adaptor .................................................................................................... 35

A.3 Duplex adaptor ..................................................................................................... 35

Bibliography .......................................................................................................................... 37

Figure 1 – Simplex PC plug connector interface ...................................................................... 8

Figure 2 – Simplex adaptor connector interface .................................................................... 11

Figure 3 – Pin gauge for adaptor ........................................................................................... 12

Figure 4 – Duplex PC plug connector interface ..................................................................... 13

Figure 5 – Duplex adaptor connector interface ...................................................................... 16

Figure 6 – Simplex angled PC plug connector interface ........................................................ 18

Figure 7 – Duplex angled PC plug connector interface .......................................................... 20

Figure 8 – Simplex active device receptacle interface for angled PC connector plug ............. 23

Figure 9 – Simplex active device receptacle interface for PC connector plug ........................ 26

Figure 10 – Duplex active device receptacle interface for angled PC connector plug............. 29

Figure 11 – Duplex active device receptacle interface for PC connector plug ........................ 32

Figure A.1 – Panel cut out .................................................................................................... 35

Figure A.2 – Fixture cut out ................................................................................................... 35

Table 1 – Interfaces ................................................................................................................ 7

Table 2 – Intermateability of interfaces ................................................................................... 7

Table 3 – Dimensions of the simplex PC plug connector interface ........................................... 9

Table 4 – Grade characteristics for simplex PC plug connector ............................................. 10

Table 5 – Dimensions of the simplex adaptor connector interface ......................................... 11

Table 6 – Grade characteristics for simplex adaptor connector ............................................. 12

Table 7 – Pin gauge dimensions ........................................................................................... 12

Table 8 – Dimensions of the duplex PC plug connector interface .......................................... 14

Table 9 – Grade characteristics for duplex PC plug connector .............................................. 15

Table 10 – Dimensions of the duplex adaptor connector interface ......................................... 17

Table 11 – Grade of the duplex adaptor connector ................................................................ 17

Table 12 – Dimensions of the simplex angled PC plug connector interfaces .......................... 19

Table 13 – Dimensions of the duplex angled PC plug connector interfaces ........................... 21

Table 14 – Dimensions of the simplex active device receptacle interface for angled PC

connector plug ...................................................................................................................... 24

---------------------- Page: 4 ----------------------
IEC 61754-4:2022 © IEC 2022 – 3 –

Table 15 – Alignment feature grade of the simplex active device receptacle interface

for angled PC connector plug ................................................................................................ 25

Table 16 – Mechanical stop feature grade of the simplex active device receptacle

interface for angled PC connector plug ................................................................................. 25

Table 17 – Dimensions of the simplex active device receptacle interface for PC

connector plug ...................................................................................................................... 27

Table 18 – Alignment feature grade of the simplex active device receptacle interface

for PC connector plug ........................................................................................................... 28

Table 19 – Mechanical stop feature grade of the simplex active device receptacle

interface for PC connector plug ............................................................................................. 28

Table 20 – Dimensions of the duplex active device receptacle interface for angled PC

connector plug ...................................................................................................................... 30

Table 21 – Alignment feature grade of the duplex active device receptacle interface for

angled PC connector plug ..................................................................................................... 31

Table 22 – Mechanical stop feature grade of the duplex active device receptacle

interface for angled PC connector plug ................................................................................. 31

Table 23 – Dimensions of the duplex active device receptacle interface for PC

connector plug ...................................................................................................................... 33

Table 24 – Alignment feature grade of the duplex active device receptacle interface for

PC connector plug ................................................................................................................ 34

Table 25 – Mechanical stop feature grade of the duplex active device receptacle

interface for PC connector plug ............................................................................................. 34

Table A.1 – Dimensions for simplex adaptor ......................................................................... 35

Table A.2 – Dimensions for duplex adaptor ........................................................................... 36

---------------------- Page: 5 ----------------------
– 4 – IEC 61754-4:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –
Part 4: Type SC connector family
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 61754-4 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and

passive components, of IEC technical committee 86: Fibre optics. It is an International Standard.

This third edition cancels and replaces the second edition published in 2013 and constitutes a

technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) the test method IEC 61300-3-22 for the compression force of the ferrule was added;

b) Annex A (informative) with cut out dimension requirements for testing the strength of

mounted adaptors was added.
---------------------- Page: 6 ----------------------
IEC 61754-4:2022 © IEC 2022 – 5 –
The text of this International Standard is based on the following documents:
Draft Report on voting
86B/4563/FDIS 86B/4584/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts of the IEC 61754 series, under the general title Fibre optic interconnecting

devices and passive components – Fibre optic connector interfaces, can be found on the IEC

website.

Future standards in this series will carry the new general title as cited above. Titles of existing

standards in this series will be updated at the time of the next edition.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 7 ----------------------
– 6 – IEC 61754-4:2022 © IEC 2022
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –
Part 4: Type SC connector family
1 Scope

This part of IEC 61754 specifies the standard interface dimensions for type SC family of

connectors.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 61300-3-22, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-22: Examinations and measurements – Ferrule compression

force

IEC 61754-1, Fibre optic interconnecting devices and passive components – Fibre optic

connector interfaces – Part 1: General and guidance
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61754-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Description

The parent connector for the type SC connector family is a single position plug connector

characterized by a 2,5 mm nominal ferrule diameter. It includes a push-pull coupling mechanism

which is spring loaded relative to the ferrule in the direction of the optical axis. The plug has a

single male key which may be used to orient and limit the relative position between the

connector and the component to which it is mated. The optical alignment mechanism of the

connector is of a sleeve style.

This document defines the standard interface dimensions of active device receptacles for the

type SC connectors. The receptacles are used to retain the connector plug and mechanically

maintain the optical datum target of the plugs at a defined position within the receptacle

housings.
---------------------- Page: 8 ----------------------
IEC 61754-4:2022 © IEC 2022 – 7 –
5 Interfaces
This document contains the standard interfaces showed in Table 1.
Table 1 – Interfaces

Interface IEC 61754-4-1 Simplex plug connector interface – push/pull, physical contact (PC)

Interface IEC 61754-4-2 Simplex adaptor connector interface – push/pull
Interface IEC 61754-4-3 Duplex plug connector interface – push/pull, PC
Interface IEC 61754-4-4 Duplex adaptor connector interface – push/pull

Interface IEC 61754-4-5 Simplex plug connector interface – push/pull, angled PC (APC) 8°

Interface IEC 61754-4-6 Duplex plug connector interface – push/pull, APC 8°

Interface IEC 61754-4-X1 Simplex active device receptacle interface – for APC 8°connector plug

Interface IEC 61754-4-X2 Simplex active device receptacle interface – for PC connector plug

Interface IEC 61754-4-X3 Duplex active device receptacle interface – for APC 8°connector plug

Interface IEC 61754-4-X4 Duplex active device receptacle interface – for PC connector plug

Table 2 shows the intermateability of interfaces.
Table 2 – Intermateability of interfaces
Adaptors/active device receptacles
Plugs
61754-4-2 61754-4-4 61754-4-X1 61754-4-X2 61754-4-X3 61754-4-X4
61754-4-1 Mate Mate Not mate Mate Not mate Mate
61754-4-3 Not mate Mate Not mate Not mate Not mate Mate
61754-4-5 Mate Mate Mate Not mate Mate Not mate
61754-4-6 Not mate Mate Not mate Not mate Mate Not mate

Figure 1 is an example of a simplex PC plug connector interface. Table 3 gives dimensions of

the simplex PC plug connector interface and Table 4 gives the grade characteristics for simplex

PC plug connector interface.

A chamfer or radius is allowed to a maximum depth of 1,8 mm from the ferrule endface.

---------------------- Page: 9 ----------------------
– 8 – IEC 61754-4:2022 © IEC 2022
Figure 1 – Simplex PC plug connector interface
---------------------- Page: 10 ----------------------
IEC 61754-4:2022 © IEC 2022 – 9 –
Table 3 – Dimensions of the simplex PC plug connector interface
Reference Dimensions Remarks
Minimum Maximum
A See Table 4
B 4,8 mm 4,9 mm
C 6,8 mm 7,4 mm
D 4,9 mm 5,3 mm
E 6,7 mm 6,8 mm
F 19° 23° Angle, unit in degrees
G Angle, unit in degrees
25° 35°
H 7,15 mm 7,5 mm
I 0,8 mm 1,2 mm
J 5,3 mm 5,5 mm
K – 0,05 mm
L 2,11 mm –
b c
M 2,0 mm 2,8 mm
N 6,6 mm 6,8 mm
O 1,6 mm 1,8 mm
P 8,89 mm 8,99 mm
Q 0,8 mm 1,0 mm
R 7,29 mm 7,39 mm
S 0,8 mm 0,90 mm Radius
T 4,05 mm 4,15 mm
U 5,4 mm 5,6 mm
V 0 mm 0,5 mm
BC 0 mm 0,5 mm Chamfer or round
BF See IEC 61755-3-1
Radius
BG See IEC 61755-3-1 Diameter
BI Angle, unit in degrees
25° 35°

Dimension H is given for plug endface when not mated. The ferrule is movable by a certain axial compression

force, with direct contacting endfaces, and therefore dimension H is variable. Ferrule compression force shall

be 7,8 N to 11,8 N when dimension H is 7,0 mm ± 0,1 mm. The compression force shall be measured according

to IEC 61300-3-22.

The delatch housing shall be movable to the right or left. Dimensions L, M and V are given when the delatch

housing is at the furthest right. Dimension M shall be negative, when the delatch housing is at the furthest left.

The right end of M shall be at the left of the mechanical datum target when the delatch housing is at the furthest

left.
Dome eccentricity of the spherical polished endface shall be less than 50 μm.
---------------------- Page: 11 ----------------------
– 10 – IEC 61754-4:2022 © IEC 2022
Table 4 – Grade characteristics for simplex PC plug connector
Dimensions
Grade Remarks
Minimum Maximum
A See IEC 61755-3-1
B See IEC 61755-3-1
C See IEC 61755-3-1
D See IEC 61755-3-1
a b
A Grade not specified at this time
a b
B 2,497 2,500
a b
C 2,494 2,500
Add the grade number to the interface reference number.
b 1
Refer to future IEC 61755-6-1 for guidance .

Figure 2 is an example of a simplex adaptor connector interface. Table 5 gives dimensions of

the simplex adaptor connector interface and Table 6 gives the grade of the simplex adaptor

connector interface.
___________
Under preparation. Stage at the time of publication: IEC/CDM 61755-6-1:2021.
---------------------- Page: 12 ----------------------
IEC 61754-4:2022 © IEC 2022 – 11 –
Figure 2 – Simplex adaptor connector interface
Table 5 – Dimensions of the simplex adaptor connector interface
Dimensions
Reference Remarks
Minimum Maximum
A See Table 6
B 4,39 mm 4,79 mm
D 4,9 mm 5,5 mm
H 6,9 mm 7,1 mm
I 0,4 mm 0,8 mm
J 5,51 mm 5,90 mm
K 0,06 mm 1,00 mm
L 1,9 mm 2,1 mm
O 2,0 mm 2,2 mm
P 9,0 mm 9,1 mm
R 7,4 mm 7,5 mm
S 1,0 mm 1,1 mm Radius
T 3,80 mm 4,04 mm
U 5,0 mm 5,3 mm
V 0,6 mm 1,6 mm
AA Angle, unit in degrees
27° 33°
AB 0,8 mm 1,0 mm
AC 0,4 mm 0,6 mm Radius
---------------------- Page: 13 ----------------------
– 12 – IEC 61754-4:2022 © IEC 2022
Dimensions
Reference Remarks
Minimum Maximum
AD 0,7 mm 0,8 mm
AE 0,4 mm 0,6 mm
AI 2,7 mm 2,8 mm
BA 5,4 mm 5,6 mm
BB 10,8 mm 11,2 mm

The dotted line structure in Figure 2 is a groove-shape preventing interference when the latch is deformed. It

is optional.
Table 6 – Grade characteristics for simplex adaptor connector
Dimensions
Grade Remarks
Minimum Maximum
a a b
Resilient sleeve
Add the grade number to the interface reference number.

The connector alignment feature is a resilient sleeve. The feature shall accept a pin

gauge shown in Figure 3 to the centre of the adaptor with a force of 2 N to 5,9 N under

the condition that another pin gauge is inserted into the feature from the other side.

The centre of the adaptor is defined by the right side position of dimension H.

Figure 3 is an example of a pin gauge for adaptor. Table 7 gives pin gauge dimensions.

Figure 3 – Pin gauge for adaptor
Table 7 – Pin gauge dimensions
Dimensions
Reference mm Remarks
Minimum Maximum
CK 2,498 5 2,499 5 Surface roughness:
grade N4 (0,2 μm radius)
CL 2,8 4,8
CN 7

Figure 4 is an example of a duplex PC plug connector interface. Table 8 gives dimensions of

the duplex PC plug connector interface and Table 9 gives the grade of the duplex PC plug

connector interface.

A chamfer or radius is allowed to a maximum depth of 1,8 mm from the ferrule endface.

---------------------- Page: 14 ----------------------
IEC 61754-4:2022 © IEC 2022 – 13 –
Figure 4 – Duplex PC plug connector interface
---------------------- Page: 15 ----------------------
– 14 – IEC 61754-4:2022 © IEC 2022
Table 8 – Dimensions of the duplex PC plug connector interface
Dimensions
Reference Remarks
Minimum Maximum
A See Table 9
B 4,8 mm 4,9 mm
C 6,8 mm 7,4 mm
D 4,9 mm 5,3 mm
E 6,7 mm 6,8 mm
F Angle, unit in degrees
19° 23°
G Angle, unit in degrees
25° 35°
H 7,15 mm 7,5 mm
I 0,8 mm 1,2 mm
J 5,3 mm 5,5 mm
K – 0,05 mm
L 2,11 mm –
b c
M 2,0 mm 2,8 mm
N 6,6 mm 6,8 mm
O 1,6 mm 1,8 mm
P 8,79 mm 8,89 mm
Q 0,8 mm 1,0 mm
R 7,29 mm 7,39 mm
S 0,8 mm 0,9 mm Radius
T 4,05 mm 4,15 mm
U 5,4 mm 5,6 mm
V 0 mm 0,5 mm
BC 0 mm 0,5 mm Chamfer or round
BF See IEC 61755-3-1
Radius
BG See IEC 61755-3-1 Diameter
BI Angle, unit in degrees
25° 35°
DB 12,65 mm 12,75 mm
DD 7 mm 35 mm

Dimension H is given for plug endface when not mated. The ferrule is movable by a certain axial compression

force, with direct contacting endfaces, and therefore dimension H is variable. Ferrule compression force shall

be 7,8 N to 11,8 N when dimension H is 7,0 mm ± 0,1 mm. The compression force shall be measured according

to IEC 61300-3-22.

The delatch housing shall be movable to the right or left. Dimensions L, M and V are given when the delatch

housing is at the furthest right.

The right end of M shall be at the left of the mechanical datum target when the delatch housing is at the furthest

left.

The delatch housing may be a rigid sleeve. When two simplex plugs are retained together by a flexible sleeve,

dimension P shall be from 8,89 mm to 8,99 mm.

The delatch housing may be a rigid sleeve. When two simplex plugs are retained together by a flexible sleeve,

dimension DB shall be from 12,25 mm to 13,15 mm.

The dome eccentricity of the spherical polished endface shall be less than 50 μm.

---------------------- Page: 16 ----------------------
IEC 61754-4:2022 © IEC 2022 – 15 –
Table 9 – Grade chara
...