EN 50377-4-4:2011

SLOVENSKI STANDARD
01-junij-2011
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Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications - Part 4-4: Type SC-PC simplex terminated on IEC
60793-2-50 category B1.1, B1.3 and B6a singlemode fibre, with full zirconia ferrule
Category U
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-
Datenübertragungssysteme - Produktnormen - Teil 4-4: Bauart SC-PC-Simplex zum
Anschluss an Einmodenfasern der Kategorie B1.1, B1.3 und B6a nach IEC 60793-2-50
mit Zirkonium-Stift für die Kategorie U
Jeux de connecteurs et composants d'interconnexion à utiliser dans les systèmes de
communication par fibres optiques - Spécifications de produits - Partie 4-4: Type simplex
SC-PC câblé sur une fibre unimodale des catégories B1.1, B1.3 et B6a de la CEI 60793-
2-50, avec férule en zircone, catégorie U
Ta slovenski standard je istoveten z: EN 50377-4-4:2011
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50377-4-4
NORME EUROPÉENNE
March 2011
EUROPÄISCHE NORM
ICS 33.180.20
English version
Connector sets and interconnect components to be used in optical fibre
communication systems -
Product specifications -
Part 4-4: Type SC-PC simplex terminated on IEC 60793-2-50 category B1.1
and B1.3 singlemode fibre, with full zirconia ferrule category U

Jeux de connecteurs et composants Steckverbindersätze und
d'interconnexion à utiliser dans les Verbindungsbauelemente für
systèmes de communication par fibres Lichtwellenleiter-
optiques - Datenübertragungssysteme -
Spécifications de produits - Produktnormen -
Partie 4-4: Type simplex SC-PC câblé sur Teil 4-4: Bauart SC-PC-Simplex zum
une fibre unimodale des catégories B1.1 Anschluss an Einmodenfasern der
et B1.3 de la CEI 60793-2-50, avec férule Kategorie B1.1 und B1.3 nach IEC 60793-
en zircone, catégorie U 2-50 mit Zirkonium-Ferrule für die
Kategorie U
This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50377-4-4:2011 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic
interconnect, passive and connectorised components.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50377-4-4 on
2011-01-02.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented

at national level by publication of an identical

national standard or by endorsement
(dop) 2012-01-02
– latest date by which the national standards conflicting
2014-01-02
with the EN have to be withdrawn
(dow)
__________
– 3 – EN 50377-4-4:2011
Connector sets and interconnect components to be used in optical fibre communication systems –
Product specifications
Part 4-4: Type SC-PC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 singlemode fibre,
with full zirconia ferrule category U
Description Performance
Coupling mechanism: Push-pull Application: For use in EN category U
(Uncontrolled environment)
Configuration: Plug/adaptor/plug Attenuation grade: B: ≤ 0,12 dB mean
(random mate) ≤ 0,25 dB for > 97 % of
Fibre category: EN 60793-2-50,
measurements
Types B1.1 and B1.3
C: ≤ 0,25 dB mean
≤ 0,50 dB for > 97 % of
measurements
Cable type: see Table 3 Return loss grades: 2: ≥ 45 dB
(random mate)
Related documents:
EN 60794-2, Optical fibre cables – Part 2: Indoor cables – Sectional specification (IEC 60794-2)
EN 61300 series, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
EN 61753-1, Fibre optic interconnecting devices and passive components performance standard –
Part 1: General and guidance for performance standards (IEC 61753-1)
EN 61754-4, Fibre optic connector interfaces – Part 4: Type SC connector family (IEC 61754-4)
EN 61755-1, Fibre optic connector optical interfaces – Part 1: Optical interfaces for single mode
non-dispersion shifted fibres – General and guidance (IEC 61755-1)
EN 61755-3-1, Fibre optic connector optical interfaces – Part 3-1: Optical interface, 2,5 mm and 1,25 mm
diameter cylindrical full zirconia PC ferrule, single mode fibre (IEC 61755-3-1)
ETSI TS 100 671, Transmission and Multiplexing (TM); Passive optical components;
Optical fibre connectors for single mode optical fibre communication systems; Common requirements and
conformance testing
Outline and maximum dimensions:
68 REF. 79 REF.
58 MAX. 60 MAX.
Contents
Foreword . 2
1 Scope . 6
1.1 Product definition . 6
1.2 Intermateability . 6
1.3 Operating environment . 6
1.4 Reliability . 6
1.5 Quality assurance . 6
2 Normative references . 7
3 Des c r iption . 8
3.1 G ener al . 8
3.2 Plug . 8
3.3 Adaptor . 8
3.4 Materials . 8
3.5 Dimensions . 8
3.6 Colour and marking . 8
4 Variants . 9
4.1 Terminated plug . 9
4.2 Adaptor . 9
5 Dimensional requirements . 10
5.1 Outline dimensions . 10
5.2 Mating face and other limit dimensions . 12
6 Tests. 21
6.1 Sample size . 21
6.2 Test and measurement methods . 21
6.3 Test sequence . 21
6.4 Pass/fail criteria . 21
7 Test report . 21
8 Performance requirements . 21
8.1 Dimensional and marking requirements . 21
8.2 Optical performance requirements . 22
8.3 Mechanical performance requirements . 23
8.4 Environmental performance requirements . 28
Annex A (informative) Attenuation against reference . 30
Annex B (normative) Adaptor matched reference plug details . 31
Annex C (normative) Sample size and product sourcing requirements . 32
Annex D (informative) Zirconia ferrule response surface . 33
Bibliography . 34

– 5 – EN 50377-4-4:2011
Figures
Figure 1 – Outline dimensions – Plug . 10
Figure 2 – Outline dimensions – Adaptor and panel cut out . 11
Figure 3 – Plug mating face and other limit dimensions . 12
Figure 4 – Adaptor mating face and other limit dimensions . 14
Figure 5 – Ferrule endface geometry after termination . 16
Figure 6 – Positioning of fibre core . 17
Figure 7 – Ferrule end face geometry – Allowable undercut . 18
Figure 8 – Requirements for the attenuation grades for the plug fibre core connected to the ideal
reference . 19
Figure 9 – Pin gauge for adaptor . 20
Figure D.1 – Radius vs. undercut and apex offset . 33

Tables
Table 1 – Ensured level of random attenuation . 6
Table 2 – Preferred colour scheme . 8
Table 3 – Plug variants . 9
Table 4 – Adaptor variants . 9
Table 5 – Optical interface parameter values for PC ferrules . 16
Table 6 – Geometrical parameters . 17
Table 7 – Optical performance requirements . 22
Table 8 – Mechanical performance requirements . 23
Table 9 – Environmental performance requirements . 28
Table A.1 . 30
Table A.2 – Reference connector details . 30
Table B.1 . 31
Table C.1 . 32

1 Scope
1.1 Product definition
This European Standard contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements which a connector terminated with cylindrical zirconia PC ferrule and assembled
singlemode resilient alignment sleeve SC-PC simplex connector set (plug/adaptor/plug), adaptor and
patchcord must meet in order for it to be categorised as an EN standard product.
Since different variants and grades of performance are permitted, product marking details are given in 3.6.
1.2 Intermateability
Although all products conforming to the requirements of this European Standard will intermate, the resulting
level of random attenuation performance will only be ensured in accordance with Table 1. The intention is that
this will be true irrespective of the manufacturing source(s) of the product.
When intermating plug variants having different attenuation grades, the resulting level of attenuation cannot
be assured to be any better than the worst attenuation grade.
The intermating of a Grade C plug with a Grade B plug will result in an uncertain level of random attenuation
performance.
Table 1 – Ensured level of random attenuation
Plug attenuation grade C B
C C C
B C B
A simplex plug can be connected in a duplex adaptor without degrading its level of performance.
1.3 Operating environment
The tests selected combined with the severities and durations are representative of a category U
environment described in EN 61753-1.
1.4 Reliability
Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with
this specification does not guarantee the reliability of the product. This should be predicted using a
recognised reliability assessment programme.
1.5 Quality assurance
Compliance with this specification does not guarantee the manufacturing consistency of the product. This
should be maintained using a recognised quality assurance programme.

– 7 – EN 50377-4-4:2011
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.
EN 60793-2-50 Optical fibres – Part 2-50: Product specifications – Sectional specification for class B
single-mode fibres (IEC 60793-2-50)
EN 61300 (series) Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures (IEC 61300 series)
EN 61300-2-1 Part 2-1: Tests – Vibration (sinusoidal) (IEC 61300-2-1)
EN 61300-2-2 Part 2-2: Tests – Mating durability (IEC 61300-2-2)
EN 61300-2-4 Part 2-4: Tests – Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-5 Part 2-5: Tests – Torsion/twist (IEC 61300-2-5)
EN 61300-2-6 Part 2-6: Tests – Tensile strength of coupling mechanism (IEC 61300-2-6)
EN 61300-2-7 Part 2-7: Tests – Bending moment (IEC 61300-2-7)
EN 61300-2-12 Part 2-12: Tests – Impact (IEC 61300-2-12)
EN 61300-2-17 Part 2-17: Tests – Cold (IEC 61300-2-17)
EN 61300-2-18 Part 2-18: Tests – Dry heat – High temperature endurance (IEC 61300-2-18)
EN 61300-2-22 Part 2-22: Tests – Change of temperature (IEC 61300-2-22)
EN 61300-2-26 Part 2-26: Tests – Salt mist (IEC 61300-2-26)
EN 61300-2-27 Part 2-27: Tests – Dust – Laminar flow (IEC 61300-2-27)
EN 61300-2-42 Part 2-42: Tests – Static side load for connectors (IEC 61300-2-42)
EN 61300-2-44 Part 2-44: Tests – Flexing of the strain relief of fibre optic devices (IEC 61300-2-44)
EN 61300-2-46 Part 2-46: Tests – Damp heat cyclic (IEC 61300-2-46)
EN 61300-3-6 Part 3-6: Examinations and measurements – Return loss (IEC 61300-3-6)
EN 61300-3-10 Part 3-10: Examinations and measurements – Gauge retention force
(IEC 61300-3-10)
EN 61300-3-15 Part 3-15: Examinations and measurements – Dome eccentricity of a convex
polished ferrule endface (IEC 61300-3-15)
EN 61300-3-16 Part 3-16: Examinations and measurements – Endface radius of spherically polished
ferrules (IEC 61300-3-16)
EN 61300-3-23 Part 3-23: Examination and measurements – Fibre position relative to ferrule endface
(IEC 61300-3-23)
EN 61300-3-28 Part 3-28: Examinations and measurements – Transient loss (IEC 61300-3-28)
EN 61300-3-34 Part 3-34: Examinations and measurements - Attenuation of random mated
connectors (IEC 61300-3-34)
EN 61300-3-42 Part 3-42: Examinations and measurements - Attenuation of single mode alignment
sleeves and or adaptors with resilient alignment sleeves (IEC 61300-3-42)
EN 61753-1 Fibre optic interconnecting devices and passive components performance standard –
Part 1: General and guidance for performance standards (IEC 61753-1)
EN 61754-4 Fibre optic connector interfaces – Part 4: Type SC connector family (IEC 61754-4)
ISO 8015 Technical drawings – Fundamental tolerancing principle

3 Description
3.1 General
The SC-PC connector is a single position plug connector set of plug / adaptor / plug configuration
characterised by a cylindrical, spring loaded butting ferrules of 2,5 mm nominal diameter and a push-pull
coupling mechanism. The optical alignment mechanism of the connector is of a resilient sleeve style.
3.2 Plug
The plug features a cylindrical zirconia ceramic ferrule and a push-pull coupling mechanisms. The plug
housing has a single male key, which is used to limit the relative rotation between mated plugs.
A cover (dust cap) to protect the ferrule end face when the connector is in the unmated condition shall be
provided.
3.3 Adaptor
The adaptor has a zirconia ceramic resilient alignment sleeve. The mounting style is a rectangular flange –
simplex.
Covers (dust caps) are provided to protect each port of the adaptor.
3.4 Materials
Materials which are not specified or which are not specifically described are left to the discretion of the
manufacturer.
3.5 Dimensions
Outline dimensions and other dimensions necessary to ensure intermateability or which affect performance
are specified. All other dimensions are left to the discretion of the manufacturer. Where the mating face limit
dimensions are not in agreement with an EN Interface Standard this is clearly stated.
3.6 Colour and marking
Marking of the product shall be in the following order of precedence:
– identification of manufacturer;
– manufacturing date code: year/week;
– manufacturers part number;
– variant identification number.
The preferred colour scheme is given in Table 2.
Table 2 – Preferred colour scheme
Delatch housing plug Adaptor
Blue, RAL 5015 Blue, RAL 5015
– 9 – EN 50377-4-4:2011
4 Variants
4.1 Terminated plug
The defined fibre/cable variants are given in Table 3.
Table 3 – Plug variants
E N 5 0 3 7 7 - 4 - 4 - * * - * - *

Variant No. Fibre/Cable Structure
∅ mm
0,7 – 1,4 Buffered fibre
02 Reinforced cable
2,0 ± 0,2
Reinforced cable
2,5 ± 0,2
2,8 ± 0,2 Reinforced cable
Reinforced cable
3,0 ± 0,2
Reinforced cable
3,2 ± 0,2
Variant Attenuation grade
B B
C C
Variant Return loss grade
2 2
4.2 Adaptor
The defined adaptor variants are given in Table 4.
Table 4 – Adaptor variants
E N 5 0 377-4-4-** *
Variant number Format
A01 Rectangular flange – simplex

5 Dimensional requirements
5.1 Outline dimensions
5.1.1 Plug
Variant No. 01
BH
Variants No. 02 – 06
BF
Reference Dimensions Notes
min. mm max.
BH 58
BF 60
Figure 1 – Outline dimensions – Plug

– 11 – EN 50377-4-4:2011
5.1.2 Adaptor
Variant No. A01. See Figure 2a).

Reference Dimensions Notes
min. mm max.
AF 21,5 22,5
AG 17,9 18,1
AH 12,6 13,0
AI 9,2 9,4
AJ 2,2 2,4 Diameter
AK 27,0 27,8
AL 2,8 3,2
AM 14,4 16,4
AN 7,7 8,0
AO 1,7 2,0 See Note
NOTE  Panel thickness should be between 1,0 mm and 1,5 mm.

a) Outline dimensions – Adaptor

Reference Dimensions Notes
min. mm max.
W 2,4 2,6 Diameter
X 13,1 13,5
Y 17,9 18,1
Z 9,5 10,0
b) Outline dimensions – Panel cut out
Figure 2 – Outline dimensions – Adaptor and panel cut out

5.2 Mating face and other limit dimensions
5.2.1 Plug
The mating face dimensions are in accordance with EN 61754-4. See Figure 3.
CROSS SECTION A-A'
Figure 3 – Plug mating face and other limit dimensions

– 13 – EN 50377-4-4:2011
Reference Dimensions Notes
min. mm max.
d
A 2,498 5 2,499 5 Diameter
B 4,80 4,90 Diameter
C 6,80 7,40
D 4,90 5,30
E 6,70 6,80
F 19 23 Degree
G 25 35 Degree
a b
H 7,15 7,50
89,5 90,5 Degree
β
I 0,80 1,20
J 5,30 5,50
c
K -0,10 0,05
L 2,11 2,50
M 2,00 2,80
N 6,60 6,80
O 1,60 1,80
P 8,89 8,99
Q 0,80 1,00
R 7,29 7,39
rS 0,80 0,90 Radius
T 4,05 4,15
U 5,40 5,60
V 0 0,50
cBC 0 0,50 Chamfer
a
Dimension H is given for a plug endface when not mated. The ferrule is movable by a certain axial
compression force, with direct contacting endface, and therefore dimension H is variable. Ferrule
compression force shall be 7,8 N to 11,8 N when the position of the optical datum target, dimension H is
moved to the range 7,00 mm ± 0,10mm. Forces are for buffered fibre only. For different cord constructions
allow higher forces of 7,8 to 12,8 N.
b
This value shows the dimension after the ferrule is polished and in the unmated condition.
c
The negative dimension refers to the position of the inside bottom plane in the direction towards the rear
of the connector relative to the mechanical reference plane.
d
Envelope condition in accordance with ISO 8015.

Figure 3 – Plug mating face and other limit dimensions (continued)

5.2.2 Adaptor
See Figure 4.
MECHANICAL REFERENCE PLANE
Figure 4 – Adaptor mating face and other limit dimensions

– 15 – EN 50377-4-4:2011
Reference Dimensions Notes
min. mm max.
a
A Diameter
B 4,69 4,79 Diameter
D 4,9 5,5
H 6,9 7,1
I 0,4 0,8
J 5,51 5,9
K 0,06 1
L 1,9 2,1
O 2,0 2,2
P 9,0 9,1
R 7,4 7,5
S 1,0 1,1
T 3,8 4,04
U 5,0 5,4 Degree
V 0,6 1,6
AA 27 33 Degree
AB 0,8 1,0
AC 0,4 0,6
AD 0,7 0,8
AE 0,4 0,6
BA 5,4 5,6
BB 10,8 11,2
a
The connector alignment feature is a zirconia ceramic resilient sleeve which is free to move in the
adaptor. Alternative materials may be used for the sleeve that has directly compatible materials properties
with zirconia. The gauge retention force shall be measured with 2 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 the extraction of one
gauge. The surface roughness of the inside of the alignment sleeve shall be R < 0,3 µm.
a
Figure 4 – Adaptor mating face and other limit dimensions (continued)

5.2.3 Ferrule endface geometry after termination
D
J
No sharp edge
K
C
B
A
E
Fig
...