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

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.

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

1.1 Définition du produit Le présent document contient les exigences de performances initiales, dimensionnelles de début de vie, optiques, mécaniques et environnementales auxquelles un connecteur raccordé à une férule PC cylindrique en zircone à angle de 9° et un jeu de connecteurs (fiche-raccord-fiche) de type SC-APC simplex à manchon d’alignement élastique unimodal assemblé, un raccord et un cordon de brassage satisfont afin d’être classés comme produits entrant dans une norme EN de produit. Le présent document est destiné à remplacer la CECC 86 265-803. Dans la mesure où différentes variantes sont autorisées, les détails de marquage des produits sont donnés en 4.6. 1.2 Compatibilité d’accouplement Les produits conformes aux exigences du présent document sont prévus pour s’accoupler entre eux et il est attendu que le niveau spécifié de performance de dispersion d’affaiblissement soit atteint. Le but est que cela se vérifie indépendamment des sources de fabrication du produit. 1.3 Environnement de fonctionnement Les essais choisis, combinés avec leurs sévérités et leurs durées, sont représentatifs d’un environnement de catégorie OP décrit dans l’EN IEC 61753-1. 1.4 Fiabilité Alors que l’espérance de vie du produit prévue dans cet environnement est de 20 ans, la conformité au présent document ne garantit pas la fiabilité du produit. Il est attendu que celle-ci soit estimée en utilisant un programme reconnu d’évaluation de la fiabilité. 1.5 Assurance de la qualité La conformité au présent document ne garantit pas l’uniformité de fabrication du produit. Il est prévu qu’elle soit suivie en utilisant un programme reconnu d’assurance de la qualité.

Konektorski sestavi in povezovalne komponente za uporabo v optičnih komunikacijskih sistemih - Specifikacije proizvoda - 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

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SLOVENSKI STANDARD
oSIST prEN 50377-4-3:2020
01-julij-2020
Konektorski sestavi in povezovalne komponente za uporabo v optičnih
komunikacijskih sistemih - Specifikacije proizvoda - 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
Ta slovenski standard je istoveten z: prEN 50377-4-3
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
oSIST prEN 50377-4-3:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 50377-4-3:2020
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oSIST prEN 50377-4-3:2020
EUROPEAN STANDARD DRAFT
prEN 50377-4-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020
ICS
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
To be completed To be completed
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2020-06-12.
It has been drawn up by CLC/TC 86BXA.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to

provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and

shall not be referred to as a European Standard.
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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Project: 68976 Ref. No. prEN 50377-4-3 E
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oSIST prEN 50377-4-3:2020
prEN 50377-4-3:2020 (E)
1 Contents Page

2 Contents ............................................................................................................................................................ 2

3 European foreword ........................................................................................................................................... 3

4 Introduction ....................................................................................................................................................... 4

5 1 Scope .......................................................................................................................................................... 5

6 1.1 Product definition............................................................................................................................... 5

7 1.2 Intermateability .................................................................................................................................. 5

8 1.3 Operating environment ...................................................................................................................... 5

9 1.4 Reliability ........................................................................................................................................... 5

10 1.5 Quality assurance.............................................................................................................................. 5

11 2 Normative references ................................................................................................................................ 5

12 3 Terms and definitions ............................................................................................................................... 6

13 4 Description ................................................................................................................................................. 7

14 4.1 General .............................................................................................................................................. 7

15 4.2 Plug ................................................................................................................................................... 7

16 4.3 Adaptor .............................................................................................................................................. 7

17 4.4 Materials ............................................................................................................................................ 7

18 4.5 Dimensions ........................................................................................................................................ 7

19 4.6 Colour and marking ........................................................................................................................... 7

20 5 Variants....................................................................................................................................................... 7

21 5.1 Terminated plug ................................................................................................................................ 7

22 5.2 Adaptor .............................................................................................................................................. 8

23 6 Dimensional requirements ....................................................................................................................... 8

24 6.1 Outline dimensions ............................................................................................................................ 8

25 6.2 Mating face and other limit dimensions ........................................................................................... 11

26 7 Tests ......................................................................................................................................................... 17

27 7.1 Sample size ..................................................................................................................................... 17

28 7.2 Test and measurement methods .................................................................................................... 17

29 7.3 Test sequence ................................................................................................................................. 18

30 7.4 Pass/fail criteria ............................................................................................................................... 18

31 8 Test report ................................................................................................................................................ 18

32 9 Product qualification requirements ....................................................................................................... 18

33 9.1 Dimensional and marking requirements ......................................................................................... 18

34 9.2 Optical Requirements ...................................................................................................................... 18

35 9.3 Mechanical performance requirements ........................................................................................... 20

36 9.4 Environmental performance requirements ...................................................................................... 24

37 Annex A (informative) Attenuation against reference ................................................................................. 27

38 Annex B (normative) Adaptor matched reference plug details .................................................................. 28

39 Annex C (normative) Sample size and product sourcing requirements ................................................... 29

40 Annex D (informative) Zirconia ferrule response surface ........................................................................... 30

41 Bibliography .................................................................................................................................................... 31

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42 European foreword

43 This document (prEN 50377-4-3:2020) has been prepared by CLC/TC 86BXA “Fibre optic interconnect, passive

44 and connectorised components“.
45 This document is currently submitted to the Enquiry.
46 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
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oSIST prEN 50377-4-3:2020
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47 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 grade: B: ≤ 0,12 dB
(random mate) mean ≤ 0,25 dB for
97 %
of measurements
Fibre category: EN 60793-2-50
Types — B-652.D and B-
657.A
Cable type: See Table 3 Return loss grade: 1: ≥ 60 dB
(random mate) mated ≥ 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 IEC 61753-1:2018 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 singlemode

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:
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48 1 Scope
49 1.1 Product definition

50 This document contains the initial, start of life dimensional, optical, mechanical and environmental performance

51 requirements which a connector terminated with cylindrical zirconia 9° angled PC ferrule and assembled singlemode

52 resilient alignment sleeve SC-APC simplex connector set (plug/adaptor/plug), adaptor and patchcord meet in order

53 for it to be categorized as an EN standard product. This document is intended to replace CECC 86 265-803.

54 Since different variants are permitted, product marking details are given in 4.6.

55 1.2 Intermateability

56 Products conforming to the requirements of this document are intended to intermate, and it is expected that the

57 specified level of random attenuation performance will be met. The intention is that this will be true irrespective of

58 the manufacturing source(s) of the product.
59 1.3 Operating environment

60 The tests selected, combined with the severities and durations, are representative of a category OP environment

61 described in EN IEC 61753-1.
62 1.4 Reliability

63 Whilst the anticipated service life expectancy of the product in this environment is 20 years, compliance with this

64 document does not guarantee the reliability of the product. This is expected to be predicted using a recognized

65 reliability assessment programme.
66 1.5 Quality assurance

67 Compliance with this document does not guarantee the manufacturing consistency of the product. This is expected

68 to be maintained using a recognized quality assurance programme.
69 2 Normative references

70 The following documents are referred to in the text in such a way that some or all of their content constitutes

71 requirements of this document. For dated references, only the edition cited applies. For undated references, the

72 latest edition of the referenced document (including any amendments) applies.

73 EN 61300-2-1, Fibre optic interconnecting devices and passive components - Basic test and measurement

74 procedures - Part 2-1: Tests - Vibration (sinusoidal) (IEC 61300-2-1)

75 EN 61300-2-2, Fibre optic interconnecting devices and passive components - Basic test and measurement

76 procedures - Part 2-2: Tests - Mating durability (IEC 61300-2-2)

77 EN 61300-2-4, Fibre optic interconnecting devices and passive components - Basic test and measurement

78 procedures - Part 2-4: Tests - Fibre/cable retention (IEC 61300-2-4)

79 EN 61300-2-5, Fibre optic interconnecting devices and passive components - Basic test and measurement

80 procedures - Part 2-5: Tests - Torsion (IEC 61300-2-5)

81 EN 61300-2-6, Fibre optic interconnecting devices and passive components - Basic test and measurement

82 procedures - Part 2-6: Tests - Tensile strength of coupling mechanism (IEC 61300-2-6)

83 EN 61300-2-7, Fibre optic interconnecting devices and passive components - Basic test and measurement

84 procedures - Part 2-7: Tests - Bending moment (IEC 61300-2-7)

85 EN 61300-2-12, Fibre optic interconnecting devices and passive components - Basic test and measurement

86 procedures - Part 2-12: Tests - Impact (IEC 61300-2-12)
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87 EN 61300-2-17, Fibre optic interconnecting devices and passive components - Basic test and measurement

88 procedures - Part 2-17: Tests - Cold (IEC 61300-2-17)

89 EN 61300-2-18, Fibre optic interconnecting devices and passive components - Basic test and measurement

90 procedures - Part 2-18: Tests - Dry heat - High temperature endurance (IEC 61300-2-18)

91 EN 61300-2-22, Fibre optic interconnecting devices and passive components - Basic test and measurement

92 procedures - Part 2-22: Tests - Change of temperature (IEC 61300-2-22)

93 EN 61300-2-26, Fibre optic interconnecting devices and passive components - Basic test and measurement

94 procedures - Part 2-26: Tests - Salt mist (IEC 61300-2-26)

95 EN 61300-2-27, Fibre optic interconnecting devices and passive components - Basic test and measurement

96 procedures - Part 2-27: Tests - Dust - Laminar flow (IEC 61300-2-27)

97 EN 61300-2-42, Fibre optic interconnecting devices and passive components - Basic test and measurement

98 procedures - Part 2-42: Tests - Static side load for strain relief (IEC 61300-2-42)

99 EN 61300-2-44, Fibre optic interconnecting devices and passive components - Basic test and measurement

100 procedures - Part 2-44: Tests - Flexing of the strain relief of fibre optic devices (IEC 61300-2-44)

101 EN 61300-2-46, Fibre optic interconnecting devices and passive components - Basic test and measurement

102 procedures - Part 2-46: Tests - Damp heat cyclic (IEC 61300-2-46)

103 EN 61300-2-50, Fibre optic interconnecting devices and passive components - Basic test and measurement

104 procedures - Part 2-50: Tests - Fibre optic connector proof test with static load - Singlemode and multimode

105 (IEC 61300-2-50)

106 EN 61300-3-6, Fibre optic interconnecting devices and passive components - Basic test and measurement

107 procedures - Part 3-6: Examinations and measurements - Return loss (IEC 61300-3-6)

108 EN 61300-3-10, Fibre optic interconnecting devices and passive components - Basic test and measurement

109 procedures - Part 3-10: Examinations and measurements - Gauge retention force (IEC 61300-3-10)

110 EN 61300-3-34, Fibre optic interconnecting devices and passive components - Basic test and measurement

111 procedures - Part 3-34: Examinations and measurements - Attenuation of random mated connectors

112 (IEC 61300-3-34)

113 EN 61300-3-42, Fibre optic interconnecting devices and passive components - Basic test and measurement

114 procedures - Part 3-42: Examinations and measurements - Attenuation of single mode alignment sleeves and or

115 adaptors with resilient alignment sleeves (IEC 61300-3-42)

116 EN 61300-3-47, Fibre optic interconnecting devices and passive components - Basic test and measurement

117 procedures - Part 3-47: Examinations and measurements - End face geometry of PC/APC spherically polished

118 ferrules using interferometry (IEC 61300-3-47)
119 3 Terms and definitions
120 No terms and definitions are listed in this document.

121 ISO and IEC maintain terminological databases for use in standardization at the following addresses:

122 • IEC Electropedia: available at http://www.electropedia.org/
123 • ISO Online browsing platform: available at http://www.iso.org/obp
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124 4 Description
125 4.1 General

126 The SC-APC connector is a single position plug connector set of plug/adaptor/plug configuration characterized by

127 a cylindrical, spring loaded butting ferrule of 2,5 mm nominal diameter and a latched push-pull coupling mechanism.

128 The optical alignment mechanism of the connectors is of a resilient sleeve style.

129 4.2 Plug

130 The plug features a cylindrical zirconia ceramic ferrule and a push-pull coupling mechanism. The plug housing has

131 a single male key, which is used to limit the relative rotation between mated plugs. A cover (dust cap) shall be

132 provided to protect the ferrule end face when the connector is in the unmated condition.

133 4.3 Adaptor

134 The adaptor has a zirconia ceramic resilient alignment sleeve. The mounting style is a rectangular flange - simplex.

135 Covers (dust caps) are provided to protect each port of the adaptor.
136 4.4 Materials

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

138 4.5 Dimensions

139 Outline dimensions and other dimensions necessary to ensure intermateability or which affect performance are

140 specified. All other dimensions are left to the discretion of the manufacturer. Where the mating face limit dimensions

141 are not in agreement with an IEC Interface Standard this is clearly stated.
142 4.6 Colour and marking
143 Marking of the product shall be in the following order of precedence:
144 — identification of manufacturer;
145 — manufacturing date code: year/week;
146 — manufacturers part number;
147 — variant identification number.
148 The preferred colour scheme is given in Table 1.
149 Table 1 — Preferred colour scheme
Delatch housing SC-APC plug Adaptor
Green, RAL 6029 Green, RAL 6029
150 5 Variants
151 5.1 Terminated plug
152 The defined fibre/cable variants are given in Table 2.
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153 Table 2 — Plug variants
E N 5 0 3 7 7 - 4 - 3 - * * - B 1
Variant No. Fibre/cable Structure Note
01 0,9 ± 0,2 Buffered fibre 9 degrees
02 1,8 ± 0,2 Reinforced cabl 9 degrees
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
154 5.2 Adaptor
155 The defined adaptor variants are given in Table 3.
156 Table 3 — Adaptor variants
E N 5 0 3 7 7 - 4 - 3 - * * *
Variant number Format
A01 Rectangular flange - simplex
157 6 Dimensional requirements
158 6.1 Outline dimensions
159 6.1.1 Plug
160 Figure 1 gives the outline dimensions of plugs.
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161
162 Variant No. 01
163
164 Variant No. 02 - 06
Ref. Dimensions Note
min. mm max.
BH 58
BF 60
165 Figure 1 — Outline dimensions — Plug
166 6.1.2 Adaptor
167 Figures 2 gives the outline dimensions of adaptors.
168 Variant No. A01
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169
170 a) Adaptor
171
172 b) Panel cut out
Ref. 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
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
Panel thickness should be between 1,0 mm and 1,5 mm.
173 Figure 2 — Adaptor outline dimensions
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174 6.2 Mating face and other limit dimensions
175 6.2.1 Plug
176 Figure 3 gives the limit dimensions for plug mating faces.
177
178 NOTE See following page.
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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
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
EA 90
Degree

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.

This value shows the dimension after the ferrule is polished and in the unmated condition.

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.
Envelope condition in accordance with ISO 8015.
Surface roughness R ≤ 0,1 µm.

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.
179 Figure 3 — Plug mating face and other limit dimensions
180 6.2.2 Adaptor
181 Figure 4 gives the limit dimensions for adaptor mating faces.
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182
References Dimensions Note
min. mm max.
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

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.
183 Figure 4 — Adaptor mating face and other limit dimensions
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184 6.2.3 Ferrule end face geometry after termination
185
186
187 Figure 5 — Ferrule end face geometry after termination
188 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
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189
190 Figure 6 — Geometric requirements for fibre core location
191 Table 5 — Optical interface parameter values for APC ferrules
Dimensions (Grade B)
References Note
min. max.
b c
A −100
, nm
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
F 0 Radius, mm
0,001 0
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.

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

The radius and fibre undercut shall be measured in all directions over a diameter of 0,25 mm.

The negative value refers to fibre protrusion.

Centre of ferrule to fibre core eccentricity distribution of a population of terminated plugs shall have a mean less than or equal

to 0,37 µm.
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192
193 Figure 7 — Ferrule end face geometry — Allowable undercut

194 The specified values for E, F and G in Figures 5 and 6, define the parameters that should be met by an individual

195 plug after termination in order to ensure that the specified random attenuation performance grade will be met. The

196 specified random performance however can only be met with a continuous Raleigh distribution of the F parameter.

197 The limit (1,0 µm) and mean (0,37 µm) values for parameter F, of a population of terminated plugs, are based on a

198 statistical mode field diameter mismatch (Formula 1) and are specified to achieve the stated performance.


2⋅⋅()πτN ⋅WW⋅ ⋅
2⋅a
11 2
− +
  
2 22 22
2⋅⋅WW 
λ ⋅+()WW ()WW+
12 12
 
199 (1)
Att. (dB)=−10⋅ log ⋅e
 22
WW+
 12 
200 where
W is the mode field radii (µm), i = 1, 2

(calculation for the above curve is made with statistical mode field diameter mismatch calculated over the

range: 8,9 ± 0,7µm)

N is the refractive index between the end faces (in this case it is equal with the refractive index of the core);

a is the fibre core eccentricity (µm);
is the fibre angle (radian);
λ is the wavelength (Calculation for the above curve is done with 1 310 nm)
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oSIST prEN 50377-4-3:2020
prEN 50377-4-3:2020 (E)
201 6.2.4 Pin gauge for adaptor
202
Reference Dimensions Note
min. mm max.
A 2,499 3 2,499 5 NOTE 1, diameter
B 12,5 13,5
C 1,0 1,5
D 28 32 Angle in degrees
NOTE 1 Envelope condition in accordance with ISO 8015.
NOTE 2 Surface roughness R ≤ 0,1 µm.
203 Figure 8 — Pin gauge for adaptor
204 7 Tests
205 7.1 Sample size
206 For the purpose of this specifi
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