IEC 60874-19-2:1999

Connectors for optical fibres and cables - Part 19-2: Fibre optic adaptor (duplex) type SC for single-mode fibre connectors - Detail specification

General Information

• Status: Published
• Publication Date: 29-Sep-1999
• 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: 30-Sep-1999
• Completion Date: 30-Sep-1999

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60874-19-2
QC 910005XX0002
First edition
1999-09
Connectors for optical fibres and cables –
Part 19-2:
Fibre optic adaptor (duplex) type SC
for single-mode fibre connectors –
Detail specification
Connecteurs pour fibres et câbles optiques –
Partie 19-2:
Adaptateur pour fibres optiques (duplex) de type SC,
pour connecteurs pour fibres optiques monomodales –
Spécification particulière
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base
publication incorporating amendments 1 and 2.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
60874-19-2
QC 910005XX0002
First edition
1999-09
Connectors for optical fibres and cables –
Part 19-2:
Fibre optic adaptor (duplex) type SC
for single-mode fibre connectors –
Detail specification
Connecteurs pour fibres et câbles optiques –
Partie 19-2:
Adaptateur pour fibres optiques (duplex) de type SC,
pour connecteurs pour fibres optiques monomodales –
Spécification particulière
 IEC 1999  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
R
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60874-19-2 © IEC:1999(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
CONNECTORS FOR OPTICAL FIBRES AND CABLES –
Part 19-2: Fibre optic adaptor (duplex) type SC
for single-mode fibre connectors –
Detail specification
FOREWORD
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 International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60874-19-2 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/1221/FDIS 86B/1257/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 not been drafted in complete accordance with the ISO/IEC Directives,
Part 3.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).
The references to clauses or subclauses of IEC 60874-1 indicated in this part apply to the third
edition of IEC 60874-1.
60874-19-2 © IEC:1999(E) – 3 –
The committee has decided that the contents of this publication will remain unchanged until 2012.
At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this standard may be issued at a later date.

– 4 – 60874-19-2 © IEC:1999(E)
CONNECTORS FOR OPTICAL FIBRES AND CABLES
Part 19-2: Fibre optic adaptor (duplex) type SC for single-mode fibre
connectors – Detail specification
NATIONAL STANDARDS .
ORGANIZATION: Date .
DETAIL SPECIFICATION IEC QC 910005XX0002
FIBRE OPTIC COMPONENT OF ASSESSED QUALITY IN ACCORDANCE WITH
• GENERIC SPECIFICATION: QC 910000 (IEC 60874-1)
• BLANK DETAIL SPECIFICATION: QC 910004 (IEC 60874-1-1)
FIBRE OPTIC ADAPTOR
CLASSIFICATION:
Type: Name: SC-duplex for single-mode connectors
For use in datacom applications as specified in ISO/IEC International Standard 11801:
Generic cabling for customer premises
Configuration: plug-adaptor-plug
Coupling: push-pull
Control dimensions:
– Adaptor: see figures 1, 2 and 3
– Gauge: figures 4 and 5
Variants: see page 10
Climatic category: 10/60/4
Environmental category: 4
Assessment level: A
QUALIFICATION PROCEDURE: Fixed sample procedure
SAFETY WARNING: Take care when handling small diameter optical fibre to prevent puncturing the skin, especially
in the eye area. Direct viewing of the end of an optical fibre when it is propagating energy is not recommended
unless prior assurance is obtained as to the safe energy output level.

60874-19-2 © IEC:1999(E) – 5 –
Partial cross section A-A’
BC
Cross section B-B’
IEC  1025/99
NOTE – The dotted lines are for information only and represent the outer shape of the fixture of the adaptor.
Figure 1 – Adaptor mating face dimensions

– 6 – 60874-19-2 © IEC:1999(E)
Dimensions
Reference Notes
Minimum Maximum
A – – Diameter, 1
B 4,59 mm 4,79 mm Diameter
D 4,90 mm 5,50 mm
H 6,90 mm 7,10 mm
I 0,40 mm 0,80 mm
J 5,51 mm 5,90 mm
K 0,06 mm 1,00 mm
L 1,90 mm 2,10 mm
O 2,00 mm 2,20 mm 2
P 9,00 mm 9,10 mm
R 7,40 mm 7,50 mm
rS 1,00 mm 1,10 mm Radius
T 3,80 mm 4,04 mm
U 5,00 mm 5,30 mm
V 0,60 mm 1,60 mm
AA 27° 33°
AB 0,80 mm 0,90 mm
AC 0,40 mm 0,60 mm
AD 0,70 mm 0,80 mm
AE 0,40 mm 0,60 mm
BA 5,40 mm 5,60 mm
11,20 mm
BB 10,80 mm
BC 2,70 mm 2,80 mm Diameter
DB 12,65 mm 12,75 mm
DD 5,60 mm 6,99 mm
NOTES
1 The connector alignment feature is a resilient alignment sleeve. The gauge retention force shall be measured
with two gauge pins, each inserted to the middle of the alignment feature. The gauge retention force shall be
from 2,0 N to 5,9 N for PC and from 2,9 N to 5,9 N for APC.
2 For the angled PC variants No. 1005 and 1006, the two slots "O" shall be symmetric within ±0,03 mm.
3 Where a tolerance of form is not specified, the limits of the dimensions for a feature control the form as well
as the size.
4 Where interrelated features of size (features shown with a common axis or centre plane) have no geometric
tolerance of location or run-out specified, the limits of the dimensions for a feature control the location
tolerance as well as the size.
5 Where perpendicular features (features shown at right angles) have no geometric tolerance of orientation or
run-out specified, the limits of the dimensions for a feature control the orientation tolerance as well as the
size.
Figure 1 – Adaptor mating face dimensions (continued)

60874-19-2 © IEC:1999(E) – 7 –
IEC  1026/99
Dimension
mm
Reference Notes
Minimum Maximum
AF 34,50 35,20 1
AG 30,20 31,20
AH 25,20 25,90
AJ 2,20 2,40
AI 9,20 9,40 1
AK 27,00 27,80
AL 2,70 2,80
AM 27,50 29,50
AO 1,70 2,20 2
NOTES
1 The dotted lines are illustrative only; the flange may be radiused or have square corners.
2 The maximum thickness of the panel shall be 1,6 mm when the adaptor is mounted using the spring hook.
Figure 2 – Adaptor dimensions
– 8 – 60874-19-2 © IEC:1999(E)
BS
∅ BS
IEC  1027/99
Dimensions
mm
Reference Notes
Minimum Maximum
BP 30,60 31,20
BQ 26,20 26,40
BR 2,40 2,60 1
BS 9,50 10,00
NOTE – If the adaptor is mounted using bolts only, this hole shall be threaded M2.
Figure 3 – Panel piercing and mounting detail
BQ
BP
60874-19-2 © IEC:1999(E) – 9 –
CN
Cor R
IEC  1028/99
Dimensions
mm
Reference Notes
Minimum Maximum
CK 2,4985 2,4995 1
CL 2,80 4,80
CN 7,00 –
NOTE – Surface roughness grade N4 (0,2 μm Ra).
Figure 4 – Dimension of a pin gauge for an adaptor
∅ CK
∅ CL
– 10 – 60874-19-2 © IEC:1999(E)
VARIANT IDENTIFICATION NUMBERS
NUMBER: XXXXXXXXXXXXXXX
ZZZZ Component name Variant feature
Housing part Sleeve material Preferred housing
material colour/indicator
1001 Adaptor SMF Plastic Zirconia Blue
1002 Adaptor SMF Plastic Phosphor bronze Blue
1003 Adaptor SMF Metal Zirconia Blue
1004 Adaptor SMF Metal Phosphor bronze Blue
1005 Adaptor APC Plastic Zirconia Green
1006 Adaptor APC Metal Zirconia Green
SUPPLEMENTARY INFORMATION
Colour:
For SMF: blue according to RAL 5015
For APC: green according to RAL 6029
Component marking:
The name and/or manufacturer’s identification mark may be permanently identified. Figure 5 shows an example of
the location of component marking.
Manufacturer’s identification mark
IEC  1029/99
Figure 5 – Example of component marking

60874-19-2 © IEC:1999(E) – 11 –
TABLE 1
FIXED SAMPLE TEST SCHEDULE FOR QUALIFICATION APPROVAL
Test sequence Reference n
IEC 60874-1 (IEC QC 910000)
(IEC 61300)
Group 0
4.4.1 (3-1) 20
− Visual examination
4.4.2 (3-1)
− Dimensions
(3-33)
− Gauge retention force
Group 1
4.4.7 (3-4) 20
− Attenuation
Group 2
Cold 4.5.17 (2-17)
−
4.5.18 (2-18) 6
− Dry heat
4.5.19 (2-19)
− Damp heat (steady state)
Group 3
4.4.5 (3-11)
− Engagement and separation force
4.5.32 (2-2) 6
− Mechanical endurance
Group 4
− Vibration 4.5.1 (2-1) 4
4.5.22 (2-22)
− Change of temperature (test Nb)
Group 5
4.5.6 (2-6) 4
− Strength of coupling mechanism
NOTES
1 n = sample size (number of adaptors).
2 To satisfy the qualification approval requirements of the detail specification, there shall be no failures of any in the
sample groups for any test parameter. If a failure does occur, this shall be investigated and the cause of failure
identified and corrected. The test which is affected shall then be repeated using the minimum sample size stated in
this detail specification.
A fully documented test report and supporting data shall be prepared and made available for inspection. Failures and
the corrective action taken to eliminate failures shall be documented and evidence presented to show that the
corrective action will have no detrimental effect on the performance in any of the other tests. Design changes, as
opposed to improvements in quality control, will necessitate a repeat of the full qualification programme.
3 Unless otherwise indicated, the test details, measurements and performance requirements are given in table 4.
4 Only group 1 tests shall be carried out using a reference connector. All other tests shall be carried out using
samples selected randomly from production.

– 12 – 60874-19-2 © IEC:1999(E)
TABLE 2
LOT-BY-LOT QUALITY CONFORMANCE INSPECTION SCHEDULE
GROUPS A AND B
Test sequence Reference Assessment level
IEC 60874-1 (IEC QC 910000) A
(IEC 61300)
IL AQL
Group A
4.4.1 (3-1) II 4 %
− Visual examination
Group B
− Attenuation 4.4.7 (3-4) II 4 %
NOTES
1 Unless otherwise indicated, the details, measurements and performance requirements are given in table 4.
2 IL = Inspection level; AQL = Acceptable quality level.
3 Only attenuation tests shall be carried out using a reference connector. All other tests shall be carried out
using products selected randomly from production.

60874-19-2 © IEC:1999(E) – 13 –
TABLE 3
PERIODIC QUALITY CONFORMANCE INSPECTION SCHEDULE
GROUPS C AND D
Test sequence Reference Assessment level
IEC 60874-1 (IEC QC 910000) A
(IEC 61300)
np
Group C0
− Visual examination 4.4.1 (3-1) 18 24
4.4.2 (3-1)
– Dimensions
(3-33)
– Gauge retention force
Group C1
− Attenuation 4.4.7 (3-4) 18 24
Group C2
4.5
...