IEC 60874-19-1:1999

INTERNATIONAL IEC
STANDARD
60874-19-1
QC 910005XX0001
First edition
1999-09
Connectors for optical fibres and cables –
Part 19-1:
Fibre optic patch cord connector type SC-PC
(floating duplex) standard terminated
on multimode fibre type A1a, A1b –
Detail specification
Connecteurs pour fibres optiques et câbles –
Partie 19-1:
Connecteur pour câble de liaison de type SC-PC
(duplex flottant) normalisé, terminé sur une fibre
multimode de types A1a, A1b –
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
60874-19-1
QC 910005XX0001
First edition
1999-09
Connectors for optical fibres and cables –
Part 19-1:
Fibre optic patch cord connector type SC-PC
(floating duplex) standard terminated
on multimode fibre type A1a, A1b –
Detail specification
Connecteurs pour fibres optiques et câbles –
Partie 19-1:
Connecteur pour câble de liaison de type SC-PC
(duplex flottant) normalisé, terminé sur une fibre
multimode de types A1a, A1b –
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: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
R
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60874-19-1 © IEC:1999(E)

INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
CONNECTORS FOR OPTICAL FIBRES AND CABLES –

Part 19-1: Fibre optic patch cord connector type SC-PC

(floating duplex) standard
terminated on multimode fibre type A1a, A1b –

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 60874-19-1 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/1220/FDIS 86B/1256/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.
60874-19-1 © 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 – 60874-19-1 © IEC:1999(E)

CONNECTORS FOR OPTICAL FIBRES AND CABLES

Part 14-9: Fibre optic patch cord connector type SC-PC (floating duplex)

standard terminated on multimode fibre type B1 – Detail specification

NATIONAL STANDARDS .

ORGANIZATION: Date .

DETAIL SPECIFICATION IEC QC 910005XX0001
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)
CONNECTOR SET FOR OPTICAL FIBRES AND CABLES
CLASSIFICATION:
Type: Name: SC (floating duplex)
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:
– Plug: see figures 1, 2 and 3
– Adaptor: see IEC 60874-19-3
Arrangement: patchcord arrangement
Style: Fibre retention: as required
Cable retention: as required
Optical coupling: butting
Alignment: resilient sleeve alignment
Variants: see page 9
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.
Applicable fibre cable information:
Core diameter In accordance with IEC 60793-2
Cladding diameter In accordance with IEC 60793-2
Buffer diameter (250 ± 15) μm, (500 ± 30) μm, (900 ± 50) μm
Tension member Aramid strength member
Jacket outer diameter As required per variant
Additional information
– Attenuation in random connection:
less than 0,75 dB
less than 0,35 dB (average)
60874-19-1 © IEC:1999(E) – 5 –

Mechanical reference plane
H
I
J
Q R
K
A
cBC
Ferrule
L
M
rS
A
De-latch housing
B
Partial cross-section A-A
V
View from B direction
IEC  1020/99
Figure 1 – Plug mating face dimensions
D
E
G
F
T ∅ A
U
∅ B
C
P
N
O
DB
– 6 – 60874-19-1 © IEC:1999(E)

Dimensions
Reference Notes
Minimum Maximum
2,498 mm 2,500 mm Diameter
A
B 4,80 mm 4,90 mm
C 6,80 mm 7,40 mm
D 4,90 mm 5,30 mm
E 6,70 mm 6,80 mm
F 19° 23°
G 25° 35°
H 7,15 mm 7,50 mm 1, 2
I 0,80 mm 1,20 mm
J 5,30 mm 5,50 mm
K –0,10 mm 0,05 mm 3
L 2,11 mm 2,50 mm
M 2,00 mm 2,80 mm
N 6,60 mm 6,80 mm
O 1,60 mm 1,80 mm
P 8,89 mm 8,99 mm
Q 0,80 mm 1,00 mm
R 7,29 mm 7,39 mm
rS 0,80 mm 0,90 mm Radius
T 4,05 mm 4,15 mm
U 5,40 mm 5,60 mm
V 0 mm 0,50 mm
cBC 0 mm 0,50 mm Chamfer
DB 12,25 mm 13,15 mm
NOTES
1 Ferrule compression force shall be from 7,8 N to 11,8 N, when the ferrule is compressed to a point where H is
7 mm ± 0,1 mm.
2 This value shows the dimension after the ferrule is polished and in the unmated condition.
3 The negative dimension refers that the position of the inside bottom plane is left-direction relative to the plane
defined as X.
4 Where a tolerance of form is not specified, the limits of the dimensions for a feature control the form as well
as the size.
5 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.
6 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.
7 Plugs shall be capable of floating between the DB maximum and DB minimum.
Figure 1 – Plug mating face dimensions (concluded)

60874-19-1 © IEC:1999(E) – 7 –

∅ BG
BK Fibre end-face
A
Note 3
Detail A
BI rBF
IEC  1021/99
IEC  1022/99
Dimensions
mm
Reference Notes
Minimum Maximum
rBF 10,00 mm 25,00 mm 1, radius
BG 1,76 mm 2,26 mm Diameter, 2

BG 1,90 mm 2,26 mm Diameter, 2
BI 25° 35°
BK –0,0001 See graph 4, see curve
NOTES
1 Eccentricity of a spherical polished ferrule endface is less than 50 μm.
2 This value is applicable for variants as per variant table on page 10.
3 Break edge.
4 The negative dimension refers to the fibre protrusion. Dimension BK shall be measured according to
IEC 61300-3-23.
Figure 2 – Ferrule endface geometry after termination

– 8 – 60874-19-1 © IEC:1999(E)

∅ BE
BD
IEC  1023/99
Dimensions
Reference mm Notes
Minimum Maximum
BD 60
BE 2,20 1
BE 2,60 2
BE 2,90 3
BE 3,20 4
NOTES
1 This value is applicable to the variant number 1001 and 1002.
2 This value is applicable to the variant number 1003 and 1004.
3 This value is applicable to the variant number 1005 and 1006.
4 This value is applicable to the variant number 1007 and 1008.
Figure 3 – Plug dimension
60874-19-1 © IEC:1999(E) – 9 –

VARIANT IDENTIFICATION NUMBERS

NUMBER: XXXXXXXXXXXX
ZZZZ Component name Variant feature

Applicable cable jacket Ferrule material Dimension

diameter BG
1001 Plug 2,00 mm Zirconia 1,76 – 2,26

1002 Plug 2,00 mm Zirconia 1,90 – 2,26

1003 Plug 2,40 mm Zirconia 1,76 – 2,26

1004 Plug 2,40 mm Zirconia 1,90 – 2,26
1005 Plug 2,70 mm Zirconia 1,76 – 2,26
1006 Plug 2,70 mm Zirconia 1,90 – 2,26
1007 Plug 3,00 mm Zirconia 1,76 – 2,26
1008 Plug 3,00 mm Zirconia 1,90 – 2,26
SUPPLEMENTARY INFORMATION
Colour:
Colour of the de-latch housing and boot shall be beige, according to: RAL 1013.
Component marking:
The name and/or manufacturer’s identification mark may be permanently identified. Figure 4 shows an example of
the location of the component marking.
Manufacturer's identification mark

IEC  1024/99
Figure 4 – Example of component marking

– 10 – 60874-19-1 © IEC:1999(E)

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
(3-22)
− Ferrule compression 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
4.5.14 (2-12)
− Drop
4.4.5 (3-11) 6
− Engagement and separation force
4.5.32 (2-2)
− Mechanical endurance
Group 4
4.5.1 (2-1) 4
− Vibration
4.5.22 (2-22)
− Change of temperature (test Nb)
Group 5
− Strength of coupling mechanism 4.5.6 (2-6) 4
4.5.4 (2-4)
− Cable pulling
4.5.5 (2-5)
− Cable torsion
Group 6
− Fibre or ferrule retention 4.5.2 (2-4) NA
NOTES
1 n = sample size (number of plugs).
2 To satisfy the qualification approval requirements of the detail specification, there shall be no failures 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
the samples from the relevant group at random.

60874-19-1 © IEC:1999(E) – 11 –

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
− Visual examination 4.4.1 (3-1) II 4 %

Radius 4.4.2 (3-1)
(3-23)
Undercut/protrusion
(3-25)
Eccentricity of spherical polished
endfaces
Group B
4.4.7 (3-4) II 4 %
− Attenuation
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 the samples from the relevant group at random.

– 12 – 60874-19-1 © IEC:1999(E)

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)
−
...