EN 50377-4-3:2022

SLOVENSKI STANDARD
01-oktober-2022
Konektorski sestavi in povezovalne komponente za uporabo v optičnih
komunikacijskih sistemih - Specifikacije izdelka - 4-3. del: Tip SC/APC, simpleksni
9°, zaključen z enorodnim vlaknom tipa B-652.D in B-657.A po standardu EN 60793
-2-50, s polno cirkonijevo tulko, kategorija OP
Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications - Part 4-3: Type SC/APC simplex 9° terminated on EN
60793-2-50 of type B-652.D and B-657.A singlemode fibre with full zirconia ferrule,
category OP
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-
Datenübertragungssysteme - Produktnormen - Teil 4-3: Bauart SC-APC-Simplex, 9°,
zum Anschluss an Einmodenfasern der Typen B-652.D und B-657.A nach EN 60793-2-
50 mit Zirkoniumdioxid-Ferrule für die Kategorie OP
Jeux de connecteurs et composants d’interconnexion à utiliser dans les systèmes de
communication par fibres optiques - Spécifications de produit - Partie 4-3: Type SC/APC
simplex 9° raccordé sur fibres unimodales de types B-652.D et B-657.A de l’EN 60793-2-
50 avec une férule en zircone pleine, catégorie OP
Ta slovenski standard je istoveten z: EN 50377-4-3:2022
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50377-4-3

NORME EUROPÉENNE
EUROPÄISCHE NORM July 2022
ICS 33.180.20
English Version
Connector sets and interconnect components to be used in
optical fibre communication systems - Product specifications -
Part 4-3: Type SC/APC simplex 9° terminated on EN 60793-2-50
of type B-652.D and B-657.A singlemode fibre with full zirconia
ferrule, category OP
Jeux de connecteurs et composants d'interconnexion à Steckverbindersätze und Verbindungsbauelemente für
utiliser dans les systèmes de communication par fibres Lichtwellenleiter- Datenübertragungssysteme -
optiques - Spécifications de produit - Partie 4-3: Type Produktnormen - Teil 4-3: Bauart SC-APC-Simplex, 9°, zum
SC/APC simplex 9° raccordé sur fibres unimodales de Anschluss an Einmodenfasern der Typen B-652.D und B-
types B-652.D et B-657.A de l'EN 60793-2-50 avec une 657.A nach EN 60793-2-50 mit Zirkoniumdioxid-Ferrule für
férule en zircone pleine, catégorie OP die Kategorie OP
This European Standard was approved by CENELEC on 2022-06-06. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50377-4-3:2022 E
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
1.1 Product definition . 7
1.2 Intermateability . 7
1.3 Operating environment . 7
1.4 Reliability . 7
1.5 Quality assurance . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Description . 9
4.1 General . 9
4.2 Plug . 9
4.3 Adaptor . 9
4.4 Materials . 9
4.5 Dimensions . 9
4.6 Colour and marking . 9
5 Variants .10
5.1 Terminated plug .10
5.2 Adaptor .10
6 Dimensional requirements .11
6.1 Outline dimensions .11
6.1.1 Plug .11
6.1.2 Adaptor .11
6.2 Mating face and other limit dimensions .13
6.2.1 Plug .13
6.2.2 Adaptor .15
6.2.3 Ferrule end face geometry after termination .17
6.2.4 Pin gauge for adaptor .20
7 Tests .20
7.1 Sample size .20
7.2 Test and measurement methods .20
7.3 Test sequence .21
7.4 Pass/fail criteria .21
8 Test report .21
9 Product qualification requirements .21
9.1 Dimensional and marking requirements .21
9.2 Optical Requirements .21
9.3 Mechanical performance requirements .23
9.4 Environmental performance requirements .27
Annex A (informative) Attenuation against reference .30
A.1 Test details .30
Reference connector details . 30
A.2
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
D.1 Maximum allowed spherical fibre undercut . 33
Annex E (informative) Estimation of average fibre core eccentricity limits as a function of batch
size . 34
Bibliography . 36

European foreword
This document (EN 50377-4-3:2022) has been prepared by CLC/TC 86BXA “Fibre optic interconnect, passive
and connectorised components”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-06-06
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-06-06
conflicting with this document have to be
withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.
Introduction
Connector sets and interconnect components to be used in optical fibre communication systems —
Product specifications
Part 4-3: Type SC/APC simplex 9° terminated on EN 60793-2-50 of type B-652.D and B-657.A
singlemode fibre with full zirconia ferrule, category OP
Description Performance
Coupling mechanism: Push-pull Application: For use in EN
Category OP (outdoor
protected
environment)
Configuration: Plug/adaptor/plug Attenuation B: ≤ 0,12 dB mean
grade: ≤ 0,25 dB for 97 %
(random mate) of measurements
Fibre category: EN 60793-2-50
Types — B-652.D and
B-657.A
Cable type: See Table 3 Return loss 1: ≥ 60 dB mated
grade: ≥ 55 dB unmated
(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 IEC 61753-1:2018 Fibre optic interconnecting devices and passive components performance
standard — Part 1: General and guidance (IEC 61753-1:2018)
EN IEC 61754-4 Fibre optic interconnecting devices and passive components — 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)
ETSI EN 300 019 series Environmental Engineering (EE); Environmental conditions and environmental
tests for telecommunications equipment
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:

1 Scope
1.1 Product definition
This document contains the initial, start of life dimensional, optical, mechanical and environmental performance
requirements which a connector terminated with cylindrical zirconia 9° angled PC ferrule and assembled
singlemode resilient alignment sleeve SC-APC simplex connector set (plug/adaptor/plug), adaptor and
patchcord meet in order for it to be categorized as an EN standard product. This document is intended to replace
CECC 86 265-803.
Since different variants are permitted, product marking details are given in 4.6.
1.2 Intermateability
Products conforming to the requirements of this document are intended to intermate, and it is expected that the
specified level of random attenuation performance will be met. The intention is that this will be true irrespective
of the manufacturing source(s) of the product.
1.3 Operating environment
The tests selected, combined with the severities and durations, are representative of a category OP
environment described in EN IEC 61753-1.
1.4 Reliability
Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with
this document does not guarantee the reliability of the product. This is expected to be predicted using a
recognized reliability assessment programme.
1.5 Quality assurance
Compliance with this document does not guarantee the manufacturing consistency of the product. This is
expected to be maintained using a recognized quality assurance programme.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 61300-2-1, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-1: Tests - Vibration (sinusoidal) (IEC 61300-2-1)
EN 61300-2-2, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-2: Tests - Mating durability (IEC 61300-2-2)
EN IEC 61300-2-4, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-4: Tests - Fibre/cable retention (IEC 61300-2-4)
EN 61300-2-5, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-5: Tests – Torsion (IEC 61300-2-5)
EN 61300-2-6, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-6: Tests - Tensile strength of coupling mechanism (IEC 61300-2-6)
EN 61300-2-7, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-7: Tests - Bending moment (IEC 61300-2-7)
EN 61300-2-12, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-12: Tests - Impact (IEC 61300-2-12)
EN 61300-2-17, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-17: Tests – Cold (IEC 61300-2-17)
EN 61300-2-18, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-18: Tests - Dry heat - High temperature endurance (IEC 61300-2-18)
EN 61300-2-22, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-22: Tests - Change of temperature (IEC 61300-2-22)
EN 61300-2-26, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-26: Tests - Salt mist (IEC 61300-2-26)
EN 61300-2-27, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-27: Tests - Dust - Laminar flow (IEC 61300-2-27)
EN 61300-2-42, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-42: Tests - Static side load for strain relief (IEC 61300-2-42)
EN 61300-2-44, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-44: Tests - Flexing of the strain relief of fibre optic devices (IEC 61300-2-44)
EN IEC 61300-2-46, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-46: Tests - Damp heat cyclic (IEC 61300-2-46)
EN 61300-2-50, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 2-50: Tests - Fibre optic connector proof test with static load - Singlemode and multimode
(IEC 61300-2-50)
EN 61300-3-6, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-6: Examinations and measurements - Return loss (IEC 61300-3-6)
EN 61300-3-10, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-10: Examinations and measurements - Gauge retention force (IEC 61300-3-10)
EN 61300-3-34, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-34: Examinations and measurements - Attenuation of random mated connectors
(IEC 61300-3-34)
EN 61300-3-42, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-42: Examinations and measurements - Attenuation of single mode alignment sleeves and
or adaptors with resilient alignment sleeves (IEC 61300-3-42)
EN 61300-3-47, Fibre optic interconnecting devices and passive components - Basic test and measurement
procedures - Part 3-47: Examinations and measurements - End face geometry of PC/APC spherically polished
ferrules using interferometry (IEC 61300-3-47)
ISO 8015, Geometrical product specifications (GPS) - Fundamentals - Concepts, principles and rules
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Description
4.1 General
The SC-APC connector is a single position plug connector set of plug/adaptor/plug configuration characterized
by a cylindrical, spring loaded butting ferrule of 2,5 mm nominal diameter and a latched push-pull coupling
mechanism. The optical alignment mechanism of the connectors is of a resilient sleeve style.
4.2 Plug
The plug features a cylindrical zirconia ceramic ferrule and a push-pull coupling mechanism. The plug housing
has a single male key, which is used to limit the relative rotation between mated plugs. A cover (dust cap) shall
be provided to protect the ferrule end face when the connector is in the unmated condition.
4.3 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.
4.4 Materials
Materials which are not specified or which are not specifically described are left to the discretion of the
manufacturer.
4.5 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 IEC Interface Standard this is clearly stated.
4.6 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 1.
Table 1 — Preferred colour scheme
Delatch housing SC-APC plug Adaptor
Green, RAL 6029 Green, RAL 6029
5 Variants
5.1 Terminated plug
The defined fibre/cable variants are given in Table 2.
Table 2 — Plug variants
E N 5 0 3 7 7 - 4 - 3 - * * - B 1

Variant No. Fibre/cable Structure Note
mm
01 0,9 ± 0,2 Buffered fibre 9 degrees
02 1,8 ± 0,2 Reinforced cabl 9 degrees
e
03 2,0 ± 0,2 Reinforced 9 degrees
cable
04 2,4 ± 0,2 Reinforced 9 degrees
cable
05 3,0 ± 0,2 Reinforced 9 degrees
cable
Variant Attenuation grade
B B
Code Return loss grade
1 1
5.2 Adaptor
The defined adaptor variants are given in Table 3.
Table 3 — Adaptor variants
E N 5 0 3 7 7 - 4 - 3 - * * *
Variant number Format
A01 Rectangular flange - simplex
6 Dimensional requirements
6.1 Outline dimensions
6.1.1 Plug
Figure 1 gives the outline dimensions of plugs.

Variant No. 01
Variant No. 02 - 06
Reference Dimensions Note
min. mm max.
BH  58
BF  60
Figure 1 — Outline dimensions — Plug
6.1.2 Adaptor
Figure 2 gives the outline dimensions of adaptors.
Variant No. A01
a) Adaptor
b) Panel cut out
Reference Dimensions Note
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
a
AO 1,7 2,0 See
W 2,4 2,6 Diameter
X 13,1 13,5
Y 17,9 18,1
Z 9,5 10,0
a
Panel thickness should be between 1,0 mm and 1,5 mm.
Figure 2 — Adaptor outline dimensions
6.2 Mating face and other limit dimensions
6.2.1 Plug
Figure 3 gives the limit dimensions for plug mating faces.

Key
1 mechanical reference plane 4 plane B
2 coupling sleeve 5 plane A
3 guide key 6 ferrule
NOTE See following page.
References Dimensions Note
Min. mm max.
d e
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
β 89,5 90,5 Degree
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
f
EA 90 Degree
a
Ferrule compression force shall be from 7,8 N to 11,8 N when the ferrule is compressed to a point where H is
(7,00 ± 0,10) mm.
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.
e
Surface roughness R ≤ 0,1 µm.
a
f
The dimension EA is defined as an angle between two planes: One plane, plane A, through the axis of the ferrule
and the axis of symmetry of the guide key. The other plane, plane B, passes through the axis of the ferrule and
the normal to the angle PC reference plane.
Figure 3 — Plug mating face and other limit dimensions
6.2.2 Adaptor
Figure 4 gives the limit dimensions for adaptor mating faces.

Key
1 mechanical reference plane
2 guide groove
NOTE See following page.
References Dimensions Note
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 have directly compatible materials properties with zirconia. 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 2,9 N to 5,9 N, for
the extraction of one gauge pin. 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
6.2.3 Ferrule end face geometry after termination

Key
1 no sharp edge
2 fibre axis
3 ferrule axis
4 angled-PC reference plane
Figure 5 — Ferrule end face geometry after termination
Table 4 — Optical interface parameter values for APC ferrules
References Parameter values Note
min. max.
J 0,8 1,7 Diameter, mm
K N/A 1,8 mm
Figure 6 — Geometric requirements for fibre core location
Table 5 — Optical interface parameter values for APC ferrules
Dimensions (Grade B)
References Note
min. max.
b c
a
A −100 , nm
b
B 5 12 Radius , mm
C 0 50 dome offset µm
D 2,498 5 2,499 5 Diameter, mm
E 0 0,2 Degrees
d
F 0 0,001 0 Radius, mm
G 0 0,000 3 Radius, mm
H 0 50 Degrees
I 9 Degrees
J 0,8 1,7 Diameter, mm
K - 1,8 mm
NOTE The core location (F,G) and tilt angle (E) values specified in this document have been calculated to ensure that the
attenuation values for Grade B are met under all circumstances.
a
Contact force 4,9 N minimum. The given end face conditions are for 3 mol % Yttria stabilized Zirconia ZrO ferrule with grain
size < 0,35 µm, a Young’s modulus between (200 ± 20) GPa and a Poisson ratio between 0,30 to 0,31 which is normative for this
specification. The relationship between the 3 end face parameters A,B,C is graphically presented in Annex D.

(,−0 795) 2
6 62 3
A = 1988×B −B×+10 B×−10 C× 10− 60

Maximum


b
The radius and fi
...