IEC 61754-20:2012

Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 20: Type LC connector family

IEC 61754-20:2012 defines the standard interface dimensions for the type LC family of connectors. The changes with respect to the previous edition are to reconsider the whole document and to add Interface IEC 61754-20-9 to IEC 61754-20-16 for a plastic optical fibre (POF). Keywords: LC connectors

Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces de connecteurs pour fibres optiques - Partie 20: Famille de connecteurs de type LC

IEC 61754-20:2012 définit les dimensions des interfaces normalisées pour la famille des connecteurs de type LC. Cette deuxième édition annule et remplace la première édition parue en 2002. Elle constitue une révision technique. Les modifications par rapport à l’édition précédente consistent à reconsidérer l’ensemble du document et à ajouter l’interface IEC 61754-20-9 à IEC 61754-20-16 pour une fibre optique plastique (POF).
Mots clés: connecteurs de type LC

General Information

• Status: Published
• Publication Date: 28-Jun-2022
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: 31-Mar-2012
• Completion Date: 05-Apr-2012

Relations

• Amended By: IEC 61754-20:2012/AMD1:2022 - Amendment 1 - Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 20: Type LC connector family
• Effective Date: 05-Sep-2023
• Revises: IEC 61754-20:2002 - Fibre optic connector interfaces - Part 20: Type LC connector family
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61754-20 ®
Edition 2.0 2012-04
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 20: Type LC connector family

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
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International Standards for all electrical, electronic and related technologies.

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IEC 61754-20 ®
Edition 2.0 2012-04
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Fibre optic

connector interfaces –
Part 20: Type LC connector family

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
U
ICS 33.180.20 ISBN 978-2-88912-986-7

– 2 – 61754-20 © IEC:2012(E)
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Description . 6
4 Interfaces . 6
Annex A (informative) Additional adaptor dimensional information. 22
Bibliography . 26

Figure 1 – Plug connector interface reference planes . 8
Figure 2 – Detail A of Figure 1 – Plug connector interface – Expanded view drawings
not-to-scale . 9
Figure 3 – Plug connector interface . 10
Figure 4 – APC plug connector interface . 11
Figure 5 – Duplex plug interface . 12
Figure 6 – Simplex adaptor interface . 14
Figure 7 – Junior (Jr.) adaptor interface (optional – note g of Table 3) . 15
Figure 8 – Duplex adaptor interface . 16
Figure 9 – Active device receptacle interface . 18
Figure 10 – Duplex active device receptacle interface . 19
Figure 11 – Pin gauge for active device receptacle . 20
Figure A.1 – Simplex adaptor . 22
Figure A.2 – Duplex square flange adaptor . 23
Figure A.3 – Duplex rectangular flange adaptor . 24
Figure A.4 –Quad rectangular flange adaptor . 25

Table 1 – Plug to Adaptor/Receptacle Intermateability . 7
Table 2 – Plug to Plug Intermateability . 8
Table 3 – Dimensions of the plug connector interface . 12
Table 4 – Plug connector interface – Ferrule grade . 13
Table 5 – Dimensions of the adaptor interface . 16
Table 6 – Dimensions of the active device receptacle . 19
Table 7 – Active device receptacle interface – Alignment sleeve grade . 20
Table 8 – Pin gauge grade . 21
Table A.1 – Dimensions of simplex adaptor . 22
Table A.2 – Dimensions of duplex square flange adaptor . 23
Table A.3 – Dimensions of duplex rectangular flange adaptor . 24
Table A.4 – Dimensions for quad rectangular flange adaptor . 25

61754-20 © IEC:2012(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC 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 in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
International Standard IEC 61754-20 has been prepared by subcommittee SC86B: Fibre optic
interconnecting devices and passive components.
This second edition cancels and replaces the first edition published in 2002. It constitutes a
technical revision. The changes with respect to the previous edition are to reconsider the whole
document and to add Interface IEC 61754-20-9 to IEC 61754-20-16 for a plastic optical fibre
(POF).
– 4 – 61754-20 © IEC:2012(E)
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3343/FDIS 86B/3393/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all parts of IEC 61754 series, published under the general title, Fibre optic
interconnecting 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.
A bilingual version of this publication may be issued at a later date.

61754-20 © IEC:2012(E) – 5 –
INTRODUCTION
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning
IEC 61754-20.
IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he/she is willing to negotiate licences
under reasonable and non-discriminatory terms and conditions with applicants throughout the
world. In this respect, the statement of the holder of this patent right is registered with IEC.
Information may be obtained from:
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2000 NE Expressway,
Norcross, GA 30071
USA
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
ISO (www.iso.org/patents) and IEC (http://www.iec.ch/tctools/patent_decl.htm) maintain on-line
data bases of patents relevant to their standards. Users are encouraged to consult the data
bases for the most up to date information concerning patents.

– 6 – 61754-20 © IEC:2012(E)
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC connector family

1 Scope
This International Standard defines the standard interface dimensions for the type LC family of
connectors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 series, Fibre optic interconnecting devices and passive components – Fibre optic
connector optical interfaces
3 Description
The parent connector for type LC connector family is a simplex plug connector set of
plug/adaptor/plug configuration which is characterized by:
• A 1,25 mm nominal diameter ferrule or, in the case of 1 mm OD POF, the fibre acts as the
ferrule.
• The connector includes a single coupling latch and a
...

IEC 61754-20 ®
Edition 2.0 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 20: Type LC connector family

Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs a fibres optiques –
Partie 20: Famille de connecteurs de type LC

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
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latest edition, a corrigendum or an amendment might have been published.

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IEC 61754-20 ®
Edition 2.0 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic

connector interfaces –
Part 20: Type LC connector family

Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de

connecteurs a fibres optiques –

Partie 20: Famille de connecteurs de type LC

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-7279-4

– 2 – IEC 61754-20:2012 © IEC 2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Description . 6
4 Interfaces . 6
Annex A (informative) Additional adaptor dimensional information . 22
Bibliography . 26

Figure 1 – Plug connector interface reference planes . 8
Figure 2 – Detail A of Figure 1 – Plug connector interface – Expanded view drawings
not-to-scale. 9
Figure 3 – Plug connector interface . 10
Figure 4 – APC plug connector interface . 11
Figure 5 – Duplex plug interface . 12
Figure 6 – Simplex adaptor interface. 14
Figure 7 – Junior (Jr.) adaptor interface (optional – note g of Table 3) . 15
Figure 8 – Duplex adaptor interface . 16
Figure 9 – Active device receptacle interface . 18
Figure 10 – Duplex active device receptacle interface . 19
Figure 11 – Pin gauge for active device receptacle . 20
Figure A.1 – Simplex adaptor . 22
Figure A.2 – Duplex square flange adaptor . 23
Figure A.3 – Duplex rectangular flange adaptor . 24
Figure A.4 –Quad rectangular flange adaptor . 25

Table 1 – Plug to Adaptor/Receptacle Intermateability . 7
Table 2 – Plug to Plug Intermateability . 8
Table 3 – Dimensions of the plug connector interface . 12
Table 4 – Plug connector interface – Ferrule grade . 13
Table 5 – Dimensions of the adaptor interface . 16
Table 6 – Dimensions of the active device receptacle . 19
Table 7 – Active device receptacle interface – Alignment sleeve grade . 20
Table 8 – Pin gauge grade . 21
Table A.1 – Dimensions of simplex adaptor . 22
Table A.2 – Dimensions of duplex square flange adaptor . 23
Table A.3 – Dimensions of duplex rectangular flange adaptor . 24
Table A.4 – Dimensions for quad rectangular flange adaptor . 25

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC 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 in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
International Standard IEC 61754-20 has been prepared by subcommittee SC86B: Fibre optic
interconnecting devices and passive components.
This bilingual version (2019-08) corresponds to the monolingual English version, published in
2012-04.
This second edition cancels and replaces the first edition published in 2002. It constitutes a
technical revision. The changes with respect to the previous edition are to reconsider the
whole document and to add Interface IEC 61754-20-9 to IEC 61754-20-16 for a plastic optical
fibre (POF).
– 4 – IEC 61754-20:2012 © IEC 2012
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3343/FDIS 86B/3393/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above
...

IEC 61754-20 ®
Edition 2.1 2022-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 20: Type LC connector family
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs à fibres optiques –
Partie 20: Famille de connecteurs de type LC
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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and French, with equivalent terms in 19 additional languages.
once a month by email.
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(IEV) online.
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If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
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Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61754-20 ®
Edition 2.1 2022-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 20: Type LC connector family
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs à fibres optiques –
Partie 20: Famille de connecteurs de type LC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-3963-6

IEC 61754-20 ®
Edition 2.1 2022-06
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 20: Type LC connector family
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs à fibres optiques –
Partie 20: Famille de connecteurs de type LC
– 2 – IEC 61754-20:2012+AMD1:2022 CSV
© IEC 2022
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Description . 6
4 Interfaces . 6
Annex A (informative) Additional adaptor dimensional information . 24
Bibliography . 28

Figure 1 – Plug connector interface reference planes . 9
Figure 2 – Detail A of Figure 1 – Plug connector interface – Expanded view drawings

not-to-scale. 9
Figure 3 – Plug connector interface . 10
Figure 4 – APC plug connector interface . 11
Figure 5 – Duplex and quad plug interfaces . 12
Figure 6 – Simplex adaptor interface. 15
Figure 7 – Junior (Jr.) adaptor interface (optional – note g of Table 3) . 16
Figure 8 – Duplex and quad adaptor interfaces . 17
Figure 9 – Active device receptacle interface . 20
Figure 10 – Duplex and quad active device receptacle interfaces . 21
Figure 11 – Pin gauge for active device receptacle . 23
Figure A.1 – Simplex adaptor . 24
Figure A.2 – Duplex square flange adaptor . 25
Figure A.3 – Duplex rectangular flange adaptor . 26
Figure A.4 –Quad rectangular flange adaptor . 27

Table 1 – Plug to adaptor/receptacle intermateability . 8
Table 2 – Plug to Plug Intermateability . 8
Table 3 – Dimensions of the plug connector interface . 13
Table 4 – Plug connector interface – Ferrule grade . 14
Table 5 – Dimensions of the adaptor interface . 18
Table 6 – Dimensions of the active device receptacle . 22
Table 7 – Active device receptacle interface – Alignment sleeve grade . 23
Table 8 – Pin gauge grade . 23
Table A.1 – Dimensions of simplex adaptor . 24
Table A.2 – Dimensions of duplex square flange adaptor . 25
Table A.3 – Dimensions of duplex rectangular flange adaptor . 26
Table A.4 – Dimensions for quad rectangular flange adaptor . 27

© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 20: Type LC connector family

FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been
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IEC 61754-20 edition 2.1 contains the second edition (2012-04) [documents
86B/3343/FDIS and 86B/3393/RVD] and its amendment 1 (2022-06) [documents
86B/4534/CDV and 86B/4595A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content
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