IEC PAS 61754-20:2001

Fibre optic connector interfaces - Part 20: Type LC connector family

Defines the standard interface dimensions for the type LC family of connectors.

General Information

• Status: Replaced
• Publication Date: 21-May-2001
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Aug-2002

Relations

• Replaced By: IEC 61754-20:2002 - Fibre optic connector interfaces - Part 20: Type LC connector family
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/PAS 61754-20
Edition 1.0
2001-05
PRE-STANDARD
Fibre optic connector interfaces –
Part 20:
Type LC connector family
PUBLI CLY AVAI LABLE SPECI FI CATI ON
IN TER N A TION AL Reference number
E L E C T R OT E CHNI CA L
IEC/PAS 61754-20
C O MMI S S I O N
IEC/PAS 61754-20
Edition 1.0
2001-05
PRE-STANDARD
Fibre optic connector interfaces –
Part 20:
Type LC connector family
PUBLI CLY AVAI LABLE SPECI FI CATI ON
IN TER N A TION AL Reference number
E L E C T R OT E CHNI CA L
IEC/PAS 61754-20
C O MMI S S I O N
Copyright © IEC 2001
CONTENTS
FOREWORD .i

1 Scope .1

2 Description.1

3 Interfaces.1

4 Figures & Tables . 3-14

Copyright © IEC 2001
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC connector family

FOREWORD
A PAS is a technical specification not fulfilling the requirements for a standard, but made available to the
public and established in an organization operating under given procedures.
IEC-PAS 61754-20 has been processed by subcommittee86B: Fibre optic interconnecting devices and passive
components, of IEC technical committee 86: Fibre optics.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document:
Draft PAS Report on voting
86B/1453/PAS 86B/1503/RVD
Following publication of this PAS, the technical committee or subcommittee concerned will investigate the
possibility of transforming the PAS into an International Standard.
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all
national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-
operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition
to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees;
any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International,
governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions
determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all interested
National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form of
standards, technical specifications, technical reports or guides and they are accepted by the National Committees in
that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards
transparently to the maximum extent possible in their national and regional standards. Any divergence between the
IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this PAS may be the subject of patent rights. The
IEC shall not be held responsible for identifying any or all such patent rights.
Page i
– 1 – Copyright © IEC 2001
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC connector family

1 Scope
This document defines the standard interface dimensions for the type LC family of

connectors.
2 Description
The parent connector for type LC connector family is a single position plug connector
set of plug/adaptor configuration which is characterized by a 1.25 mm nominal diameter
ferrule. The connector includes a single coupling latch and a ferrule spring loaded 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 connectors is a rigid bore sleeve or a
resilient sleeve.
3 Interfaces
The subsequent pages define the standard interfaces for the type LC connector family.
The standard interfaces contained in this document are listed in the following:
IEC 61754-20-1: Simplex Plug Connector Interface – PC
IEC 61754-20-2: Simplex Adaptor Connector Interface
IEC 61754-20-3: Simplex Active Device Receptacle Interface
IEC 61754-20-4: Duplex Plug Connector Interface – PC
IEC 61754-20-5: Duplex Adaptor Connector Interface
IEC 61754-20-6: Duplex Active Device Receptacle Interface
IEC 61754-20-7: Simplex Plug Connector Interface – APC 8°
IEC 61754-20-8: Duplex Plug Connector Interface – APC 8°
The plug of IEC 61754-20-1 and IEC 61754-20-4 has a ferrule with a spherically
polished endface, and realizes physical contact (PC). The plug of IEC 61754-20-7 and
IEC 61754-20-8 has a ferrule with a spherically polished angled endface which may take
any of the APC forms shown in Detail A and realizes a physical contact.

– 2 – Copyright © IEC 2001
The following plugs, adaptors, and receptacles are intermateable

Plugs Adaptors/Active Device Receptacles Interfaces

(polishing condition) 61754-20-2 61754-20-3 61754-20-5 61754-20-6

Interface 61754-20-1 mate mate mate mate

Interface 61754-20-4 not mate not mate mate mate

Interface 61754-20-7 mate not mate mate not mate

Interface 61754-20-8 not mate not mate mate not mate

Plugs Plug (polishing condition)

(polishing condition)
61754-20-1 61754-20-4 61754-20-7 61754-20-8
Interface 61754-20-1 mate mate not mate not mate
Interface 61754-20-4 mate mate not mate not mate
Interface 61754-20-7 not mate not mate mate mate
Interface 61754-20-8 not mate not mate mate mate

– 3 – Copyright © IEC 2001
OPTICAL
MECHANICAL
REFERENCE
REFERENCE
PLANE
PLANE
B
OPTICAL
DATUM
TARGET
Detail A
IEC  369/01
Figure 1 – Plug Connector Interface Reference Planes
- B -
MECHANICAL
REFERENCE
C
PLANE
⊕ 0.05 M   B
a
D
Q
E T
R
P
⊕ 0.05 M   B
S
AA
O
b
X
U
AD W
M Z
AB
N
b
AC
V
a
F
- A -
J
H
I
L
Y
G
⊕ 0.025  M   B  A
OPTICAL
REFERENCE
H
PLANE
Section a-a Section b-b
IEC  370/01
Figure 2 – Plug Connector Interface

– 4 – Copyright © IEC 2001
∅A
AE
Note 3
AF
AG
PC Polish
∅A ∅A
AJ AH
Note 3 Note 3
AI AI
AG
APC Polish
APC Polish
Stepped
Conical
Ferrule
Ferrule
IEC  371/01
Detail A – Plug Connector Interface – Expanded View
Drawings Not-to-Scale
The plug of IEC 61754-20-1 and IEC 61754-20-4 has a ferrule with a spherically
polished endface, and realizes physical contact (PC). The plug of IEC 61754-20-7 and
IEC 61754-20-8 has a ferrule with a spherically polished angled endface which may take
any of the APC forms shown in Detail A and realizes a physical contact.

– 5 – Copyright © IEC 2001
Plane A
Guide Key
A
...