IEC 61754-15:2009

IEC 61754-15 ®
Edition 2.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 15: Type LSH connector family

Dispositifs d'interconnexion et composants passifs à fibres optiques –
Interfaces de connecteurs pour fibres optiques –
Partie 15: Famille de connecteurs de type LSH

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IEC 61754-15 ®
Edition 2.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 15: Type LSH connector family

Dispositifs d'interconnexion et composants passifs à fibres optiques –
Interfaces de connecteurs pour fibres optiques –
Partie 15: Famille de connecteurs de type LSH

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 33.180.20 ISBN 978-2-88912-275-2
– 2 – 61754-15 Ó IEC:2009
CONTENTS
FOREW ORD . 3
1 Sc o pe . 5
2 Normative references . 5
3 Description . 5
4 Interfaces . 5
Annex A (informative) Panel cutout . 14

Figure 1 – Simplex plug interface . 6
Figure 2 – APC/PC endface geometry . 7
Figure 3 – Duplex plug interface . 7
Figure 4 – Different types of adaptor interface with optional adaptor flanges . 10
Figure 5 – Pin gauge for adaptor . 12
Figure 6 – Active device interface . 12
Figure A.1 – Simplex and duplex adaptor cutout . 14

Table 1 – Intermateability between plugs, adaptors and active device . 6
Table 2 – Dimensions of plug connector interface . 8
Table 3 – Ferrule grade table for plug connector interface . 9
Table 4 – Dimensions of the simplex and duplex adaptor interface . 11
Table 5 – Gauge pin dimensions . 12
Table 6 – Dimensions of active device interface. 13
Table 7 – Grade table . 13
Table A.1 – Dimensions of the simplex and duplex adaptor cutout . 14

61754-15 Ó IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 15: Type LSH 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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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.
International Standard IEC 61754-15 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 1999. The main
changes with regard to the previous edition are to reconsider the figures and the dimensions
of the interface.
This bilingual version, published in 2010-12, corresponds to the English version.

– 4 – 61754-15  IEC:2009
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2835/FDIS 86B/2876/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in 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 publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of January 2014 have been included in this copy.

61754-15 Ó IEC:2009 – 5 –
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 15: Type LSH connector family

1 Scope
This part of IEC 61754 defines the standard interface dimensions for the type LSH family of
connectors.
2 Normative references
The following referenced documents are indispensable for the application 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 61755-3 (all parts), Fibre optic connector optical interface – Part 3: Optical interface
ISO 8015, Technical drawings – Fundamental tolerancing principle
3 Description
The parent connector for the type LSH connector family is a single-position plug connector
which is characterized by a 2,5 mm nominal ferrule diameter. It includes a push-click-pull
coupling mechanism, which is spring-loaded relative to the ferrule in the direction of the
optical axis. The optical alignment mechanism of the connectors is a rigid bore sleeve or a
resilient sleeve style.
4 Interfaces
The pages that follow define the standard interfaces for the type LSH connector family.
This standard contains the following standard interfaces:
Interface 61754-15-1 Simplex plug connector PC-interface
Interface 61754-15-2 Simplex adaptor interface
Interface 61754-15-3 Duplex plug connector PC-interface
Interface 61754-15-4 Duplex adaptor interface
Interface 61754-15-5 Simplex plug connector interface – APC 8°
Interface 61754-15-6 Duplex plug connector interface – APC 8°
Interface 61754-15-7 Active device interface
The following standards are intermateable.

– 6 – 61754-15 Ó IEC:2009
Table 1 – Intermateability between plugs, adaptors and active device
Plugs Adaptors Active device
61754-15-2 61754-15-4 61754-15-7
61754-15-1 Mate Mate Mate
61754-15-3 Not mate Mate Not mate
61754-15-5 Mate Mate Mate
61754-15-6 Not mate Mate Not mate

Mechanical reference plane
AB U M
AR
O N Open
I
AN P
AM
Optical datum target
Z
T
A
J
Ferrule
H
Closed
View from direction A
AS
Plane A
AT
Body
EB
Plane B
Ferrule
Expanded view from direction A
Expanded view from
(after polishing, APC type)
direction B (APC type)
IEC  984/09
Figure 1 – Simplex plug interface

E G
V
AO
AA
F
R
S
AG
ÆA
D
AF
ÆB
C
61754-15 Ó IEC:2009 – 7 –
A A
BG BG
No sharp edge No sharp edge
BF BF
IEC  985/09
Figure 2 – APC/PC endface geometry

DD
A
IEC  986/09
Figure 3 – Duplex plug interface

BH
BH
DB
– 8 – 61754-15  IEC:2009
Table 2 – Dimensions of plug connector interface
Reference Dimensions Notes
Minimum Basic Maximum
A – – 1, See Table 3
B 4,45 mm 4,55 mm Diameter
C 6,25 mm 6,29 mm
D 8,82 mm 8,9 mm
E 2,75 mm 2,79 mm
F 2,95 mm 2,99 mm
G 0,67 mm 1 mm
H 5,95 mm 5,98 mm
I 4,93 mm 4,98 mm
J 4,13 mm 4,18 mm
K 45° 60° Angle in degrees
L 6,1 mm 6,5 mm
M 12,05 mm – 2
N 10,9 mm 11,1 mm
O 0,9 mm 1,5 mm
P 4,5 mm 5,1 mm
R 4,9 mm 5,11 mm
S 1,25 mm 1,35 mm
T 25° 36° Angle in degrees
U 6,8 mm 7,2 mm
V 8,2 mm 8,4 mm
Z 3,9 mm 4,1 mm
AA 0,95 mm – 3
AB 2,5 mm 2,8 mm 3
AF 2,2 mm 2,3 mm
AG 1,15 mm 1,2 mm
AM 3 mm 3,2 mm
AN 0,1 mm 0,3 mm
AO 1,5 mm 2 mm
AR – 6,2 mm
AS 2,8 mm 3,5 mm
AT 1,65 mm 1,8 mm
BF 5 mm – Radius, 4
BG 0,8 mm – Pedestal diameter
BH – 1,8 mm
EA – 90° – Angle in degrees, 5 and 6
EB – 8° – Angle in degrees, 6
DB 7,35 mm 7,45 mm Float
DD 18,2 mm 19 mm
61754-15 Ó IEC:2009 – 9 –
Table 2 (continued)
NOTE 1 A chamfer or radius is allowed to a maximum depth of 1 mm from the ferrule endface.
NOTE 2 Dimension M is given for plug endface when not mated. It is movable by a certain axial compression
force, with direct contacting endfaces, and therefore dimension M is variable. Ferrule compression force should be
7,8 N to 11,8 N when the dimension M is 11,9 mm to 12 mm.
NOTE 3 AA and AB correspond to a mechanical codification.
NOTE 4 See the IEC 61755-3 series.
NOTE 5 Dimension EA is defined as an angle between two planes: one plane, plane A, passes through the axis
of the ferrule and the axis of symmetry of the body of the angled endface connector plug. The other plane, plane
B, passes through the axis of the ferrule and the normal to the tangent plane at the axis of the ferrule endface.
NOTE 6 Only for APC version.
Table 3 – Ferrule grade table for plug connector interface
Grade A
Minimum Maximum
0 2,499 0 mm 2,499 5 mm
1 2,498 5 mm 2,499 5 mm
2 2,498 3 mm 2,499 5 mm
Mechanical reference plane
U M
AR
AC N
I
O P
AB
Z
AE
A
L
Other design allowed
AH
J
AK H
BB
View from direction A
IEC  987/09
Figure 4a – Simplex adaptor interface with optional adaptor flanges
V
C
AF
AA
AG
S
AS
ÆA
ÆB
D
E
F
BA
– 10 – 61754-15 Ó IEC:2009
I AR
DB
J
H
EB
View from direction A
IEC  988/09
Figure 4b – Duplex adaptor interface with optional adaptor flanges
Figure 4 – Different types of adaptor interface with optional adaptor flanges
E
F
EA
61754-15 Ó IEC:2009 – 11 –
Table 4 – Dimensions of the simplex and duplex adaptor interface
Reference Dimensions Notes
Minimum Basic Maximum
A – – See note
B 4,2 mm 4,4 mm Diameter
C 6,31 mm –
D 8,93 mm 8,97 mm
E 2,81 mm 2,85 mm
F 3,02 mm 3,05 mm
H 6 mm 6,05 mm
I 5 mm 5,05 mm
J 4,2 mm 4,25 mm
L – 6,5 mm
M 11,9 mm 12 mm
N 11,15 mm 11,5 mm
O 0,75 mm 0,85 mm
P 5,1 mm –
S – 1,2 mm
U 6,5 mm 6,7 mm
V 8,45 mm 8,65 mm
Z 4,8 mm 5,2 mm
AA – 0,9 mm
AB 2,4 mm 2,6 mm
AC – 2,9 mm
AE 30° 40° Angle in degrees
AF 4,11 mm 4,20 mm
AG 1,25 mm –
AH – 8,65 mm
AK 14,8 mm –
AR 6,3 mm –
AS 6,31 mm 6,35 mm
BA – 13,05 mm
BB – 9 mm
DB 7,35 mm 7,45 mm
EA – 13,05 mm
EB – 14,75 mm
NOTE The connector alignment feature is a resilient sleeve. The feature should accept a gauge pin to the centre of
the adaptor with a force of 2 N to 5,9 N under the condition that another gauge pin is inserted into the feature from
the other side. The centre of the adaptor is defined by the right side position of the dimension M.

– 12 – 61754-15 Ó IEC:2009
B C
D
0,0005
2)
IEC  989/09
Envelope condition in accordance with ISO 8015.
Surface roughness R = 0,2 mm.
Z
Figure 5 – Pin gauge for adaptor
Table 5 – Gauge pin dimensions
References Dimensions Notes
Minimum Basic Maximum
A 2,499 3 mm 2,499 5 mm
...