SIST EN 50377-8-12:2010

Connector sets and interconnect components to be used in optical fibre communication systems - Product specifications - Part 8-12: Type LSH-APC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 single mode fibre with titanium composite ferrule for Category U

This standard contains the initial,  start of life dimensional, optical,  mechanical and environmental  performance requirements which a  terminated and assembled  singlemode resilient alignment sleeve  LSH-APC 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  3.5.

Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-Datenübertragungssysteme - Produktnormen - Teil 8-12: Bauart LSH-APC-Simplex zum Anschluss an Einmodenfasern der Typen B1.1 und B1.3 nach IEC 60793-2-50 mit Titanium-Komposit-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 8-12: Type LSH-APC simplex raccordé sur des fibres unimodales de catégorie B1.1 et B1.3 de la CEI 60793-2-50, avec férule en composite de titane, pour utilisation en catégorie U

Konektorski sestavi in povezovalne komponente za optične komunikacijske sisteme - Specifikacije izdelka - 8-12. del: Simpleks LSH-APC, zaključen na enorodnem optičnem kablu po IEC 60793-2-50 kategorij B1.1 in B1.3 s tulko iz titanovega kompozita kategorije U

Ta standard vsebuje začetne zahteve za dimenzije, optične in mehanske zahteve ter zahteve za okoljsko učinkovitost, ki jim morajo ustrezati zaključeni in sestavljeni enorodni prožni (z obojko) konektorski sestav simpleks LSH-APC (priključek-adapter-priključek), adapter in priključni kabel, da bi bili opredeljeni kot proizvod EN standarda. Ker so dovoljene različne različice in stopnje zmogljivosti, so podrobnosti o označevanju proizvoda navedene v točki 3.5.

General Information

• Status: Published
• Public Enquiry End Date: 14-May-2009
• Publication Date: 08-Jul-2010
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: iTEL - Communication cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Jun-2010
• Due Date: 27-Aug-2010
• Completion Date: 09-Jul-2010
• Ref Project: EN 50377-8-12:2010 - Connector sets and interconnect components to be used in optical fibre communication systems - Product specifications - Part 8-12: Type LSH-APC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3 singlemode fibre with titanium composite ferrule for category U

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50377-8-12:2010
01-september-2010
.RQHNWRUVNLVHVWDYLLQSRYH]RYDOQHNRPSRQHQWH]DRSWLþQHNRPXQLNDFLMVNH
VLVWHPH6SHFLILNDFLMHL]GHONDGHO6LPSOHNV/6+$3&]DNOMXþHQQD
HQRURGQHPRSWLþQHPNDEOXSR,(&NDWHJRULM%LQ%VWXONRL]
WLWDQRYHJDNRPSR]LWDNDWHJRULMH8
Connector sets and interconnect components to be used in optical fibre communication
systems - Product specifications - Part 8-12: Type LSH-APC simplex terminated on IEC
60793-2-50 category B1.1 and B1.3 single mode fibre with titanium composite ferrule for
Category U
Steckverbindersätze und Verbindungsbauelemente für Lichtwellenleiter-
Datenübertragungssysteme - Produktnormen - Teil 8-12: Bauart LSH-APC-Simplex zum
Anschluss an Einmodenfasern der Typen B1.1 und B1.3 nach IEC 60793-2-50 mit
Titanium-Komposit-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 8-12: Type LSH-
APC simplex raccordé sur des fibres unimodales de catégorie B1.1 et B1.3 de la CEI
60793-2-50, avec férule en composite de titane, pour utilisation en catégorie U
Ta slovenski standard je istoveten z: EN 50377-8-12:2010
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 50377-8-12:2010 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 50377-8-12:2010

---------------------- Page: 2 ----------------------

SIST EN 50377-8-12:2010

EUROPEAN STANDARD
EN 50377-8-12

NORME EUROPÉENNE
April 2010
EUROPÄISCHE NORM

ICS 33.180.20


English version


Connector sets and interconnect components to be used in optical fibre
communication systems - Product specifications -
Part 8-12: Type LSH-APC simplex terminated on IEC 60793-2-50
category B1.1 and B1.3 singlemode fibre
with titanium composite ferrule for category U


Jeux de connecteurs et composants Steckverbindersätze und
d'interconnexion à utiliser dans Verbindungsbauelemente
les systèmes de communication par fibres für Lichtwellenleiter-
optiques - Spécifications de produits - Datenübertragungssysteme -
Partie 8-12: Type LSH-APC simplex Produktnormen -
raccordé sur des fibres unimodales Teil 8-12: Bauart LSH-APC-Simplex zum
de catégorie B1.1 et B1.3 Anschluss an Einmodenfasern der Typen
de la CEI 60793-2-50, avec férule B1.1 und B1.3 nach IEC 60793-2-50 mit
en composite de titane, pour utilisation Titanium-Komposit-Stift für die Kategorie U
en catégorie U


This European Standard was approved by CENELEC on 2010-04-01. 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


© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50377-8-12:2010 E

---------------------- Page: 3 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 2 -
Foreword

This European Standard was prepared by the Technical Committee CENELEC TC 86BXA, Fibre optic
interconnect, passive and connectorised components. It was submitted to the formal vote and approved
by CENELEC as EN 50377-8-12 on 2010-04-01.

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) 2011-04-01

– latest date by which the national standards conflicting
(dow) 2013-04-01
with the EN have to be withdrawn

__________

---------------------- Page: 4 ----------------------

R 30 min.
SIST EN 50377-8-12:2010
- 3 - EN 50377-8-12:2010
Connector sets and interconnect components
to be used in optical fibre communication systems - Product specifications
Part 8-12: Type LSH-APC simplex terminated on IEC 60793-2-50 category B1.1 and B1.3
single mode fibre with titanium composite ferrule for Category U
Description Performance
Coupling mechanism: latched push-pull Application: For use in Category U
 (uncontrolled environment)

Configuration: plug/adaptor/plug Attenuation B: ≤ 0,12 dB mean
grades: ≤ 0,25 dB for > 97 % of
(random mate) measurements
Fibre category: EN 60793-2-50 C: ≤ 0,25 dB mean
type B1.1 and ≤ 0,50 dB for > 97 % of
B1.3 measurements

Return loss 1: ≥ 60 dB (mated)
Cable type: see Table 3 grades:   ≥ 55 dB (unmated)

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 61754-15 Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 15: Type LSH connector family (IEC 61754-15)
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 61755-3-8 Fibre optic interconnecting devices and passive components – Fibre optic
connector optical interfaces – Part 3-8: Optical interface, 2,5 mm and 1,25 mm
diameter cylindrical 8 degrees angled-APC composite ferrule using titanium as
fibre surrounding material, single mode fibre (IEC 61755-3-8)
Outline and maximum dimensions:

60 66
34 38





Ref. Ref.
max. max.
R 30 min.

---------------------- Page: 5 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 4 -
Contents
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 . 6
3 Description . 7
3.1 Plug . 7
3.2 Adaptor . 8
3.3 Materials . 8
3.4 Dimensions . 8
3.5 Colour and marking . 8
4 Variants . 9
4.1 Terminated plug . 9
4.2 Adaptor . 10
5 Dimensional requirements . 11
5.1 Outline dimensions . 11
5.1.1 Plug variants . 11
5.1.2 Adaptor variants . 12
5.2 Mating face and other limit dimensions . 15
5.2.1 Plug . 15
5.2.2 Ferrule endface geometry and fibre core position after termination. 17
5.2.3 Control of fibre core position and axis . 20
5.2.4 Adaptor . 21
5.2.5 Pin gauge for adaptor . 23
6 Tests . 24
6.1 Sample size . 24
6.2 Test and measurement methods . 24
6.3 Test sequence. 24
6.4 Pass/fail criteria . 24
7 Test report . 24
8 Product qualification requirements . 25
8.1 Dimensional and marking requirements . 25
8.2 Optical performance requirements. 25
8.3 Mechanical performance requirements. 27
Annex A (normative) Adaptor matched reference plug details . 35
Annex B (normative) Sample size and product sourcing requirements . 36
Annex C (informative) Reference connector details . 37
C.1 Reference plug . 37
C.2 Test details . 37
Bibliography . 38

---------------------- Page: 6 ----------------------

SIST EN 50377-8-12:2010
- 5 - EN 50377-8-12:2010
Figures
Figure 1 – Outline dimensions – Plug . 11
Figure 2 – Outline dimensions – Adaptor . 12
Figure 3 – Mating face and other limit dimensions – Plug . 15
Figure 4 – Ferrule end face geometry – After termination . 17
Figure 5 – Positioning of fibre core . 18
Figure 6 – Ferrule end face geometry – Allowable undercut . 19
Figure 7 – Requirements for the attenuation grades for the plug fibre core connected
to the ideal reference . 20
Figure 8 – Mating face and other dimensions – Adaptor . 21
Figure 9 – Pin gauge for adaptor . 23

Tables
Table 1 – Ensured level of random attenuation . 6
Table 2 – Preferred colour scheme . 8
Table 3 – Plug variants . 9
Table 4 – Adaptor variants . 10
Table 5 – Geometrical parameters . 18
Table 6 – Optical performance requirements . 25
Table 7 – Mechanical performance requirements . 27
Table 8 – Environmental performance requirements . 32
Table A.1 . 35
Table B.1 . 36
Table C.1 . 37
Table C.2 . 37

---------------------- Page: 7 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 6 -
1 Scope

1.1 Product definition

This standard contains the initial, start of life dimensional, optical, mechanical and environmental
performance requirements which a terminated and assembled singlemode resilient alignment sleeve LSH-
APC 8° 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 3.5.

1.2 Intermateability

Although all products conforming to the requirements of this 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 can
not 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 variant/Attenuation grade C B
C C C
B C B

1.3 Operating environment

The tests selected combined with the severities and durations are representative of a Category U
environment as defined 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 standard 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 standard does not guarantee the manufacturing consistency of the product. This
should be maintained using a recognised quality assurance programme.

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 61300-2-1 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 Part 2-2: Tests – Mating durability (IEC 61300-2-2)

---------------------- Page: 8 ----------------------

SIST EN 50377-8-12:2010
- 7 - EN 50377-8-12:2010
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 61300-2-42 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 61300-3-4 Part 3-4: Examinations and measurements – Attenuation (IEC 61300-3-4)
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 61755-1 Fibre optic connector optical interfaces –
Part 1: Optical interfaces for single mode non-dispersion shifted fibres – General
and guidance (IEC 61755-1)
ISO 8015 Technical drawings – Fundamental tolerancing principle

3 Description

The LSH-APC connector is a single position plug connector set of plug-adaptor-plug configuration
characterised 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.

3.1 Plug

The plug features a cylindrical composite ferrule using titanium as fibre surrounding material and a push-
pull mechanism. It has a single male key which is used to limit and may be used to orientate, the relative
rotation between mated connectors. The plug has mechanical and colour coding.

---------------------- Page: 9 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 8 -
3.2 Adaptor

The adaptor has a zirconia ceramic resilient alignment sleeve. The mounting style can be:
- square flange – 2 hole fixing;
- square flange – side clip fixing;
- square flange – top bottom clip fixing.

Covers (dust caps) shall be provided to protect each port of the adaptor. The adaptor has a mechanical
colour coding.

3.3 Materials

Materials which are not specified or which are not specifically described are left to the discretion of the
manufacturer.

3.4 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.

3.5 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 following colour scheme is preferred:

Table 2 – Preferred colour scheme
Adaptor Delatch housing
Green Green
Preferred RAL number 6018

---------------------- Page: 10 ----------------------

SIST EN 50377-8-12:2010
- 9 - EN 50377-8-12:2010
4 Variants

4.1 Terminated plug

The following variants are permitted:

Table 3 – Plug variants
E N 5 0 3 7 7 - 8 - 12 - * * * - * 1




No. Fibre/Cable Structure
∅ mm
01 0,6 - 1,4 Buffered fibre
02 Reinforced Cable
2,0 ± 0,2
03 2,5 ± 0,2 Reinforced Cable
04 Reinforced Cable
2,8 ± 0,2
05 3,0 ± 0,2 Reinforced Cable
06 Reinforced Cable
3,2 ± 0,2



Mechanical Colour code for Note
code the latch
0 Green See NOTE, not
coded
1 Red, RAL 3020
2 Brown, RAL 8004
3 Yellow, RAL 1016
4 Orange, RAL 2003
5 Violet, RAL 4008
6 White, RAL 9010
NOTE Universal, intermatable to all mechanical and colour coded adaptors.





Code Attenuation grade
B B
C C



Code Return loss grade
1 1

---------------------- Page: 11 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 10 -
4.2 Adaptor

The following variants are permitted:

Table 4 – Adaptor variants
E N 50377 -8 - 12 - D * **





No. Format
01 Square flange 2 hole screw
fixing
02 Square flange side clip fixing
03 Square flange top-bottom clip
fixing




Mechanical Colour code for the frame Note
code
0 Green See NOTE, not coded
1 Red, RAL 3020
2 Brown, RAL 8004
3 Yellow, RAL 1016
4 Orange, RAL 2003
5 Violet, RAL 4008
6 White, RAL 9010
NOTE Universal, intermatable to all mechanical and colour coded plugs.

---------------------- Page: 12 ----------------------

SIST EN 50377-8-12:2010
- 11 - EN 50377-8-12:2010
5 Dimensional requirements

5.1 Outline dimensions

5.1.1 Plug variants

Variant No. 01* (*, third digit related to mechanical coding)




Ref. Dimensions Note
mm
min. max.
A  - 34 See NOTE
B  - 60
C 0,7 1,4
D  - 13,05
E 5,95 5,98
NOTE  Rigid length.

Variant No. 02*/03*/04*/05*/06*







Ref. Dimensions Note
min. mm max.
A  - 38 See NOTE
B  - 60
C 1,8 3,5
D  - 13,05
E 5,95 5,98
NOTE  Rigid length.


Figure 1 – Outline dimensions – Plug

---------------------- Page: 13 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 12 -
5.1.2 Adaptor variants

Variant No. D01*(*, fourth character related to mechanical coding)
Ref. Dimensions Note
mm
min. max.
A 41,7 42,5
B 19,0 19,4
C - 9
D - 22,1
E - 13,05
G 13,1 13,5
H 9,6 10,0
I 17,9 18,1
L 2,2 2,4 Diameter

Figure 2 – Outline dimensions – Adaptor

---------------------- Page: 14 ----------------------

SIST EN 50377-8-12:2010
- 13 - EN 50377-8-12:2010
Variant No. D02*
Ref. Dimensions Note
min. mm max.
A 41,7 42,5
B 19,0 19,4
C - 9
D - 22,2
E - 13,1
F 1,3 1,6
G 13,1 13,5
H 9,6 10,0
K - 9,6

Figure 2 – Outline dimensions – Adaptor (continued)

---------------------- Page: 15 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 14 -
Variant No. D03*
Ref. Dimensions Note
min. mm max.
A 41,7 42,5
B 19,0 21,4
C - 9
D - 22,2
E - 13,1
F 1,3 1,6
G 13,1 13,5
H 9,6 10,0

Figure 2 – Outline dimensions – Adaptor (continued)

---------------------- Page: 16 ----------------------

SIST EN 50377-8-12:2010
- 15 - EN 50377-8-12:2010
5.2 Mating face and other limit dimensions

5.2.1 Plug


Universal




View from direction B (mechanical color coding according to Table 2) only latch


Figure 3 – Mating face and other limit dimensions – Plug

---------------------- Page: 17 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 16 -

Ref. Dimensions Note
min. mm max.
A - - Diameter
See NOTES 2 and 3
Table in Figure 5
B 4,45 4,55 Diameter
C 6,25 6,29
D 8,82 8,9
E 2,75 2,79
F 2,95 2,99
G 0,67 1,0
H 5,95 5,98
I 4,93 4,98
J 4,13 4,18
K 45 60 Angle in degrees
L 6,1 6,5
M (free) 12,05 - See NOTE 1
M (mated) 11,9 - See NOTE 1
N 10,9 11,1
O 0,9 1,5
P 4,5 5,1
R 1,2 1,5
S 1,25 1,35
T 25 36 Angle in degrees
U 6,8 7,2
V 8,2 8,4
Z 3,9 4,1
AA 0,95 -
AB 2,5 2,8
AF 2,2 2,3
AG 1,15 1,2
AM 3,0 3,2
AN 0,1 0,3
AO 1,5 2,0
AR - 6,2
AS 2,8 3,5
AT 1,65 1,8
CA 0,99 1,01
CB 0,49 0,51
CC 1,49 1,51
CD 1,96 2,04
CE 0,95 1,05
NOTE 1  Dimension M (free) refers to the plug in the unmated condition. Dimension M (mated) varies
according to the axial compression generated when mated. The axial compression force shall be
between 7,8 N and 11,8 N when dimension M (mated) is between 12,0 mm and 11,9 mm.
NOTE 2  Envelope condition in accordance with ISO 8015.
NOTE 3  Surface roughness Ra ≤ 0,1 µm.
Figure 3 – Mating face and other limit dimensions – Plug (continued)

---------------------- Page: 18 ----------------------

SIST EN 50377-8-12:2010
- 17 - EN 50377-8-12:2010

5.2.2 Ferrule endface geometry and fibre core position after termination






A


J
8°
No sharp edge






K





E



Ferrule axis

Fibre axis





C

D
B














Figure 4 – Ferrule end face geometry – After termination

---------------------- Page: 19 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 18 -






F















Figure 5 – Positioning of fibre core



Table 5 – Geometrical parameters
Ref. Parameter values Notes
Grade B Grade C
min. mm max. min. mm max.
A 2,499 0 2,499 5 2,498 5 2,499 5 Diameter
B 7 20 7 20 See NOTE 4,
Radius
C 0 50 0 50 See NOTE 3, µm
D -200 see Figure 6 -200 See Figure 6 See NOTES 1
and 2, nm
E 0 0,6 0 0,8 Degrees
F 0 0,000 15 0 0,000 3 Radius
J 0,8 - 0,8 -
K - 1,8 - 1,8
NOTE 1  Contact force 4,9 N minimum. Ferrule material: titanium. Nominal material physical constant values:
Young’s Modulus, E = 105 GPa, Poisson’s Ratio, ν = 0,34.
NOTE 2  A negative value indicates fibre protrusion.
NOTE 3  The dimension C shall be measured in both extreme positions of the ferrule when the ferrule is
rotated in the connector.
NOTE 4  The radius and fibre undercut shall be measured in all directions over a diameter of 0,25 mm.

---------------------- Page: 20 ----------------------

SIST EN 50377-8-12:2010
- 19 - EN 50377-8-12:2010
300
Allowable undercut for 4,9 [N]
250
Apex offset 50 µm
200
150
100
50
0
6 8 10 12 14 16 18 20
End face radius [mm]



 
(−0,765) 6 2 6 2 3
D = 2 115 ⋅B −B ⋅10 + B ⋅10 −C ⋅10 − 80
 
Maximum
 

Figure 6 – Ferrule end face geometry – Allowable undercut


Allowable undercut [nm]

---------------------- Page: 21 ----------------------

SIST EN 50377-8-12:2010
EN 50377-8-12:2010 - 20 -
5.2.3 Control of fibre core position and axis

Figure 7 shows the relationship between the axis of the fibre and the position of the fibre core relative to
the optical datum (see 5.2.2).

1.2
Grade C
1.1
1.0
0.9
Grade B
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6
...