SIST EN 61076-2-107:2010

• Abstract:

  IEC 61076-2-107:2010 describes circular M12 connectors typically used for industrial process measurement and control. These connectors consist of fixed and free connectors with screw-locking as well as adaptors. The connectors are suitable to connect two optic fibres and two electrical wires intended for power transmission to the optionally integrated transmitter and receiver, not specified in this standard.

• Status: Published
• Publication Date: 12-Jul-2010
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 28-Jun-2010
• Due Date: 02-Sep-2010
• Completion Date: 13-Jul-2010
• Ref Project: EN 61076-2-107:2010 - Connectors for electronic equipment - Product requirements - Part 2-107: Detail specification for circular hybrid connectors M12 with electrical and fibre-optic contacts with screw locking

• Refers: SIST EN IEC 61300-2-2:2026 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-2: Tests - Mating durability (IEC 61300-2-2:2026)
• Effective Date: 15-Sep-2026
• Refers: SIST EN ISO 1302:2004 - Geometrical Product Specifications (GPS) - Indication of surface texture in technical product documentation (ISO 1302:2002)
• Effective Date: 09-Feb-2026
• Refers: SIST EN 60793-2-40:2011 - Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres (IEC 60793-2-40:2009)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 61984:2009 - Connectors - Safety requirements and tests (IEC 61984:2008)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 61300-2-1:2023 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-1: Tests - Vibration (sinusoidal) (IEC 61300-2-1:2023)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 61755-2-1:2007 - Fibre optic connector optical interfaces -- Part 2-1: Optical interface standard single mode non-angled physically contacting fibres
• Effective Date: 03-Feb-2026
• Refers: SIST EN 61300-3-6:2009 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-6: Examinations and measurements - Return loss (IEC 61300-3-6:2008)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60664-1:2007 - Insulation coordination for equipment within low-voltage systems -- Part 1: Principles, requirements and tests
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 61300-2-26:2023 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-26: Tests - Salt mist (IEC 61300-2-26:2023)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60352-5:2002/A1:2004 - Solderless connections -- Part 5: Press-in connections - General requirements, test methods and practical guidance
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 61300-2-27:2024 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-27: Tests - Dust (laminar flow) (IEC 61300-2-27:2024)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60999-1:2001 - Connecting devices - Electrical copper conductors - Safety requirements for screw-type and screwless-type clamping units -- Part 1: General requirements and particular requirements for clamping units for conductors from 0,2 mm² up to 35 mm² (included)
• Effective Date: 03-Feb-2026
• Refers: SIST EN IEC 61300-2-5:2022 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 2-5: Tests - Torsion (IEC 61300-2-5:2022)
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60068-1:2014 - Environmental testing - Part 1: General and guidance
• Effective Date: 03-Feb-2026
• Refers: SIST EN 61755-3-1:2009 - 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 61755-3-1:2006 (MOD) + corrigendum Jan. 2009)
• Effective Date: 03-Feb-2026

SIST EN 61076-2-107:2010 is the Slovenian adoption of EN 61076-2-107:2010, based on IEC 61076-2-107:2010. It specifies product requirements for circular hybrid M12 connectors with electrical and fibre-optic contacts and screw locking, mainly for industrial process measurement and control. It is useful for connector manufacturers, equipment designers, test labs, and buyers who need the connector interface, ratings, dimensions, and verification tests in one document.

What does SIST EN 61076-2-107:2010 specify?

SIST EN 61076-2-107:2010 covers circular M12 hybrid connectors made up of fixed connectors, free connectors, and adaptors. The connectors are intended to link two optical fibres and two electrical wires for power transmission to an optionally integrated transmitter and receiver.

The document organizes the subject into general information, technical information, dimensions, characteristics, and a test schedule. Annex ZA gives the normative references to the corresponding European publications.

Annex	What it covers
ZA	Normative references to international publications and their corresponding European publications

The scope also fixes the basic connector concept: male connectors use 1.0 mm round electrical contacts and 1.25 mm round optical ferrules, with singlemode and multimode fibre types identified in the document. Dimensions are given in millimetres throughout.

What are the key requirements of SIST EN 61076-2-107:2010?

The standard ties together the connector design, the performance limits, and the test methods. In practice, that means a manufacturer has to match the interface dimensions, choose approved terminations, and pass the electrical, optical, mechanical, and environmental checks.

Connector types, termination, and marking

Clause 1.4 lists the permitted electrical termination types: screw, crimp, insulation piercing, insulation displacement, press-in, or solder. Optical termination is agreed between manufacturer and user. This matters because the standard does not leave the electrical side open-ended, but it gives flexibility for the optical side.

Clause 1.6 requires connector and package marking to follow IEC 61076-1. Clause 1.7 points to IEC 61984 for safety aspects. For a user, this means the marking and safety basis are not left to individual practice.

Ratings and electrical performance

Clause 1.5.1 gives the basic electrical rating: 250 V d.c. or a.c., 4 A, and the related contact-spacing and climatic-category requirements. Clause 4.2 then turns those ratings into testable limits.

The electrical tests include voltage proof at 1.4 kV between contacts and between contacts and metal housing, current-carrying capacity at 4 A at 40 °C, contact resistance, and insulation resistance with a 500 V d.c. test. In practice, this tells a designer or buyer what the connector can support and what must be checked during qualification.

Optical performance

Clause 1.5.2 and Clause 4.3 define the optical side. The ferrule and end-face dimensions follow IEC 61754-20, with grade 1 for singlemode fibre and grade 2 for multimode fibre. Optical performance is specified through insertion loss and return loss, including random-mate values.

This matters because optical connectors are not only a mechanical fit problem - the document also sets the optical quality that the mating pair must deliver. The ferrule compression force is given as 5-6 N, so assembly and test setups need to respect that load.

Dimensions, styles, and mating interface

Clause 2 identifies the styles: AF and BF fixed connectors, CM free connector, and DF adaptor. Clause 3 gives the interface dimensions, gauge dimensions, and engagement information, including the front view plug connector and mated-position dimensions.

For a user, this is the part that controls interchangeability. It shows which styles can mate, how they polarize, and what envelope dimensions to expect on a panel or cable assembly.

Mechanical and environmental performance

Clause 4.4 sets the mechanical and ingress protection requirements. The mated and locked connector is rated IP65 and IP67 to IEC 60529, with IP68 only by agreement between manufacturer and user. Mechanical operation, insertion and withdrawal forces, polarization, and sinusoidal vibration are all specified.

The number of mechanical operations depends on contact finish: gold, silver, tin, or other finishes are treated differently. In practice, that means life testing depends on the selected contact material, so procurement needs to match the finish to the expected duty cycle.

Verification by test schedule

Clause 5 organizes the verification into test groups: preliminary, dynamic/climatic, mechanical endurance, electrical load, chemical resistivity, and connection method tests. The schedule also defines specimen numbers, contact-resistance measurement arrangements, and vibration fixtures.

This is important for qualification and conformity assessment because it shows not only what to test, but the order in which the tests are performed and which specimens are used.

What terms does SIST EN 61076-2-107:2010 define?

• Fixed connector - the panel- or equipment-mounted connector style used as the stationary half of the mating pair.
• Free connector - the cable-side connector that mates with the fixed connector and includes the locking nut.
• Adaptor - a straight connector interface piece without a locking nut, used in the mating arrangement defined by the standard.
• M12 - the 12 mm thread size used for the screw-locking mechanism of these circular connectors.
• IP65 / IP67 - ingress protection ratings used for the mated and locked connector in this standard.
• SELV/PELV - safety extra-low voltage / protective extra-low voltage; the standard reduces the accessible rated voltage to 50 V SELV/PELV for the male contacts in the relevant condition.
• Pollution degree - the environmental contamination class used with voltage coordination in Clause 4.2.1.

Who uses SIST EN 61076-2-107:2010?

The standard is used by connector manufacturers who design and verify M12 hybrid products, and by cable assembly suppliers who need to build compliant fixed and free connector sets. It is also used by equipment designers in industrial process measurement and control when selecting a connector interface for mixed electrical and optical transmission.

Quality managers and test laboratories use it to plan qualification tests, check dimensions, and confirm electrical, optical, and mechanical performance. Buyers and specifiers use it to compare products on the same interface, ratings, and test basis.

What changed in SIST EN 61076-2-107:2010 from the previous edition?

SIST EN 61076-2-107:2010 cancels and replaces IEC/PAS 61076-2-107 issued in 2007. For the European standard, CENELEC added Annex ZA and approved the IEC text without modification.

Which standards are used with SIST EN 61076-2-107:2010?

Reference	What it contributes
IEC 61076-1	Generic product requirements for connectors for electronic equipment
IEC 61984	Safety requirements and tests for connectors
IEC 60529	IP Code for ingress protection
IEC 60664-1	Insulation coordination for low-voltage systems
IEC 60512-1-100	General publication for connector tests and measurements
IEC 60068-1	Environmental testing conditions
IEC 60352, IEC 60998-2-1, IEC 60999-1	Permitted connection and clamping methods
IEC 61300-2-1, -2-2, -2-4, -2-5, -2-26, -2-27, -3-4, -3-6, -3-10, -3-34	Fibre-optic test methods used in the schedule
IEC 61754-20, IEC 61755-2-1, IEC 61755-3-1	Optical interface and ferrule definitions
IEC 60793-2-40, IEC 60793-2-50	Multimode and singlemode fibre specifications
EN 50377-7-4	Singlemode return-loss references used in the optical tests

What does the SIST EN 61076-2-107:2010 document contain?

The document includes drawings and tables for fixed connectors, free connectors, and adaptors, plus mating information and gauge dimensions. It also provides the electrical and optical characteristic tables that set the ratings, voltage proof, current capacity, insertion loss, return loss, IP degree, and force limits.

Clause 5 adds the practical test sequence, with arrangements for contact-resistance measurement and vibration testing, and test groups P, AP, BP, CP, DP, and EP. The figures and tables are meant for design checks, qualification testing, and conformity work rather than for general theory.

SLOVENSKI STANDARD
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Connectors for electronic equipment - Product requirements - Part 2-107: Detail
specification for circular hybrid connectors M12 with electrical and fibre-optic contacts
with screw locking (IEC 61076-2-107:2010)
Steckverbinder für elektronische Einrichtungen - Produktanforderungen -Teil 2-107:
Bauartspezifikation für hybride Rundsteckverbinder M12 mit elektrischen und LWL-
Kontakten und mit Schraubverriegelung (IEC 61076-2-107:2010)
Connecteurs pour équipements électroniques - Exigences de produit - Partie 2-107:
Spécification particulière relative aux connecteurs circulaires hybrides M12 à contacts
électriques et à fibres optiques, à verrouillage par vis (CEI 61076-2-107:2010)
Ta slovenski standard je istoveten z: EN 61076-2-107:2010
ICS:
31.220.10 9WLþLLQYWLþQLFHNRQHNWRUML Plug-and-socket devices.
Connectors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61076-2-107
NORME EUROPÉENNE
June 2010
EUROPÄISCHE NORM
ICS 31.220.10
English version
Connectors for electronic equipment -
Product requirements -
Part 2-107: Detail specification for circular hybrid connectors M12 with
electrical and fibre-optic contacts with screw locking
(IEC 61076-2-107:2010)
Connecteurs pour équipements Steckverbinder für elektronische
électroniques - Einrichtungen – Produktanforderungen --
Exigences de produit - Teil 2-107: Bauartspezifikation für hybride
Partie 2-107: Spécification particulière Rundsteckverbinder M12 mit elektrischen
relative aux connecteurs circulaires und LWL-Kontakten
hybrides M12 à contacts électriques und mit Schraubverriegelung
et à fibres optiques, à verrouillage par vis (IEC 61076-2-107:2010)
(CEI 61076-2-107:2010)
This European Standard was approved by CENELEC on 2010-06-01. 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 61076-2-107:2010 E

Foreword
The text of document 48B/2141/FDIS, future edition 1 of IEC 61076-2-107, prepared by SC 48B,
Connectors, of IEC TC 48, Electromechanical components and mechanical structures for electronic
equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61076-2-107 on 2010-06-01.
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) 2011-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61076-2-107:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61076-2-001:2001 NOTE  Harmonized as EN 61076-2-001:2001 (not modified).
IEC 61076-2-101:2008 NOTE  Harmonized as EN 61076-2-101:2008 (not modified).
IEC 61300-2-12:2009 NOTE  Harmonized as EN 61300-2-12:2009 (not modified).
IEC 61300-2-17:2003 NOTE  Harmonized as EN 61300-2-17:2003 (not modified).
IEC 61300-2-18:2005 NOTE  Harmonized as EN 61300-20-18:2005 (not modified).
IEC 61300-2-42:2005 NOTE  Harmonized as EN 61300-2-42:2005 (not modified).
__________
- 3 - EN 61076-2-107:2010
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

- - Connector sets and interconnect components EN 50377-7-4 -
to be used in optical fibre communication
systems - Product specifications - Part 7-4:
LC-PC simplex terminated on IEC 60793-2
category B1.1 singlemode fibre

IEC 60050-581 2008 International Electrotechnical Vocabulary - - -
Part 581: Electromechanical components for
electronic equipment
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
1)
+ A1 1992 Part 1: General and guidance - -

IEC 60352 Series Solderless connections EN 60352 Series

IEC 60512-1-100 - Connectors for electronic equipment - Tests EN 60512-1-100 -
and measurements -
Part 1-100: General - Applicable publications

IEC 60529 2001 Degrees of protection provided by enclosures - -
(IP Code)
IEC 60664-1 - Insulation coordination for equipment within EN 60664-1 -
low-voltage systems -
Part 1: Principles, requirements and tests

IEC 60793-2-40 - Optical fibres - EN 60793-2-40 -
Part 40: Product specifications - Sectional
specification for categroy A4 multimode fibres

IEC 60793-2-50 - Optical fibres - EN 60793-2-50 -
Part 2-50: Product specifications - Sectional
specification for class B single-mode fibres

IEC 60998-2-1 2002 Connecting devices for low-voltage circuits EN 60998-2-1 2004
(mod) for household and similar purposes -
Part 2-1: Particular requirements for
connecting devices as separate entities with
screw-type clamping units
1)
EN 60068-1 includes A1 to IEC 60068-1
+ corr. October .
Publication Year Title EN/HD Year

IEC 60999-1 1999 Connecting devices - Electrical copper EN 60999-1 2000
conductors - Safety requirements for screw-
type and screwless-type clamping units -
Part 1: General requirements and particular
requirements for clamping units for conductors
from 0,2 mm² up to 35 mm² (included)

IEC 61076-1 2006 Connectors for electronic equipment - EN 61076-1 2006
Product requirements -
Part 1: Generic specification
IEC 61300-2-1 2009 Fibre optic interconnecting devices and EN 61300-2-1 2009
passive components - Basic test and
measurement procedures -
Part 2-1: Tests - Vibration (sinusoidal)

IEC 61300-2-2 2009 Fibre optic interconnecting devices and EN 61300-2-2 2009
passive components - Basic test and + corr. May 2009
measurement procedures -
Part 2-2: Tests - Mating durability

IEC 61300-2-4 1995 Fibre optic interconnecting devices and EN 61300-2-4 1997
passive components - Basic test and
measurement procedures -
Part 2-4: Tests - Fibre/cable retention

IEC 61300-2-5 2009 Fibre optic interconnecting devices and FprEN 61300-2-5 2008
passive components - Basic test and
measurement procedures -
Part 2-5: Tests - Torsion
IEC 61300-2-26 2006 Fibre optic interconnecting devices and EN 61300-2-26 2007
passive components - Basic test and
measurement procedures -
Part 2-26: Tests - Salt mist
IEC 61300-2-27 1995 Fibre optic interconnecting devices and EN 61300-2-27 1997
passive components - Basic test and
measurement procedures -
Part 2-27: Tests - Dust - Laminar flow

IEC 61300-3-4 2001 Fibre optic interconnecting devices and EN 61300-3-4 2001
passive components - Basic test and
measurement procedures -
Part 3-4: Examinations and measurements -
Attenuation
IEC 61300-3-6 2008 Fibre optic interconnecting devices and EN 61300-3-6 2009
passive components - Basic test and
measurement procedures -
Part 3-6: Examinations and measurements -
Return loss
IEC 61300-3-10 2006 Fibre optic interconnecting devices and EN 61300-3-10 2007
passive components - Basic test and
measurement procedures -
Part 3-10: Examinations and measurements -
Gauge retention force
IEC 61300-3-34 2009 Fibre optic interconnecting devices and EN 61300-3-34 2009
passive components - Basic test and
measurement procedures -
Part 3-34: Examinations and measurements -
Attenuation of random mated connectors

- 5 - EN 61076-2-107:2010
Publication Year Title EN/HD Year

IEC 61753-022-2 - Fibre optic interconnecting devices and EN 61753-022-2 -
passive components performance standard -
Part 022-2: Fibre optic connectors terminated
on multimode fibre for category C - Controlled
environment
IEC 61754-20 2002 Fibre optic connector interfaces - EN 61754-20 2002
Part 20: Type LC connector family

IEC 61755-2-1 - Fibre optic connector optical interfaces - EN 61755-2-1 -
Part 2-1: Optical interface standard single
mode non-angled physically contacting fibres

IEC 61755-3-1 - Fibre optic connector optical interfaces - EN 61755-3-1 -
Part 3-1: Optical interface, 2,5 mm and
1,25 mm diameter cylindrical full zirconia PC
ferrule, single mode fibre
IEC 61984 2008 Connectors - Safety requirements and tests EN 61984 2009

ISO 1302 - Geometrical Product Specifications (GPS) - EN ISO 1302 -
Indication of surface texture in technical
product documentation
IEC 61076-2-107 ®
Edition 1.0 2010-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Product requirements –
Part 2–107: Detail specification for circular hybrid connectors M12 with
electrical and fibre-optic contacts with screw locking

Connecteurs pour équipements électroniques – Exigences de produit –
Partie 2–107: Spécification particulière relative aux connecteurs circulaires
hybrides M12 à contacts électriques et à fibres optiques, à verrouillage par vis

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 31.220.10 ISBN 978-2-88910-405-5
– 2 – 61076-2-107 © IEC:2010
CONTENTS
FOREWORD.4
1 General information.7
1.1 Scope.7
1.2 Normative references .7
1.3 Terms and definitions .9
1.4 Recommended method of termination .9
1.5 Ratings and characteristics .9
1.5.1 Electrical contacts .9
1.5.2 Optical contacts.9
1.6 Marking .10
1.7 Safety aspects.10
2 Technical information .10
2.1 Mounting orientation.10
2.2 Survey of styles and variants.10
2.2.1 Fixed connectors .10
2.2.2 Free connectors .12
2.2.3 Adaptor .12
3 Dimensions .13
3.1 General .13
3.2 Interface dimensions .14
3.2.1 Pin front view plug connector.14
3.3 Engagement (mating) information.15
3.4 Gauges for electric contacts .16
4 Characteristics .16
4.1 Climatic category.16
4.2 Electrical characteristics (only electrical contacts).17
4.2.1 Rated voltage – Impulse voltage – Pollution degree.17
4.2.2 Voltage proof.17
4.2.3 Current-carrying capacity.17
4.2.4 Contact resistance.18
4.2.5 Insulation resistance.18
4.3 Optical characteristics (only optical contacts) .18
4.3.1 Dimensions for ferrule and end face .18
4.3.2 Insertion loss (reference).18
4.3.3 Insertion loss (random mate) .18
4.3.4 Return loss (random mate) .18
4.4 Mechanical.19
4.4.1 IP degree of protection .19
4.4.2 Mechanical operation .19
4.4.3 Insertion and withdrawal forces .19
4.4.4 Contact retention of electrical contacts in insert.20
4.4.5 Polarizing method.20
4.4.6 Vibration (sinusoidal).20
5 Test schedule.20
5.1 General .20
5.1.1 Arrangement for contact resistance measurements.21

61076-2-107 © IEC:2010 – 3 –
5.1.2 Arrangement for dynamic stress tests (vibration) .21
5.2 Test schedule.22
5.2.1 Test group P – Preliminary .22
5.2.2 Test group AP – Dynamic/ Climatic.24
5.2.3 Test group BP – Mechanical endurance.28
5.2.4 Test group CP – Electrical load .31
5.2.5 Test group DP – Chemical resistivity .32
5.2.6 Test group EP – Connection method tests .33
Bibliography.34

Figure 1 – Fixed connector, electrical female contacts, single hole mounting thread
M16 × 1,5, mounting orientation.10
Figure 2 – Fixed connector, electrical female contacts, for feed through, single hole
mounting thread M16 × 1,5 .11
Figure 3 – Free connector, straight version, with locking nut, male contacts .12
Figure 4 – Adaptor, straight version, without locking nut .13
Figure 5 – Pin front view plug connector .14
Figure 6 – Engagement (mating) information .15
Figure 7 – Gauge dimensions .16
Figure 8 – Contact resistance arrangement.21
Figure 9 – Dynamic stress test arrangement A.22
Figure 10 – Dynamic stress test arrangement B.22

Table 1 – Styles of fixed connectors .10
Table 2 – Dimensions for connector style AF .11
Table 3 – Dimensions for connector style BF .11
Table 4 – Styles of free connectors.12
Table 5 – Dimensions for connector style CM .12
Table 6 – Styles of adaptors .12
Table 7 – Dimensions for adaptor style DF.13
Table 8 – Dimensions for front view plug connector .15
Table 9 – Dimensions for connectors type D in mated position.16
Table 10 – Gauges .16
Table 11 – Climatic Category.16
Table 12 – Rated voltage – Impulse voltage – Pollution degree .17
Table 13 – Voltage proof.17
Table 14 – Number of mechanical operations .19
Table 15 – Insertion and withdrawal forces .20
Table 16 – Number of test specimens .21
Table 17 – Test group P .23
Table 18 – Test group AP .24
Table 19 – Test group BP .28
Table 20 – Test group CP .31
Table 21 – Test group DP .32
Table 22 – Test group EP .33

– 4 – 61076-2-107 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2–107: Detail specification for circular hybrid connectors M12
with electrical and fibre-optic contacts with screw locking

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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services carried out by independent certification bodies.
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7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61076-2-107 has been prepared by subcommittee 48B:
Connectors, of IEC technical committee 48: Electromechanical components and mechanical
structures for electronic equipment, in cooperation with subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
IEC 61076-2-107 cancels and replaces IEC/PAS 61076-2-107 issued in 2007.

61076-2-107 © IEC:2010 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
48B/2141/FDIS 48B/2181/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of IEC 61076 series, under the general title Connectors for electronic
equipment – Product requirements, can be found on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 61076-2-107 © IEC:2010
IEC SC 48B – Connectors IEC 61076-2-107, Ed. 1.0

Specification available from:
IEC General secretariat
or from the addresses shown on the inside cover.
ELECTRONIC COMPONENTS
DETAIL SPECIFICATION in accordance with IEC 61076-1

Circular hybrid connectors with M12

screw locking, with 2 electrical

contacts with Ø 1,0 male contacts

and with 2 fibre optic contacts

Ø 1,25 mm ferrule in accordance

with IEC 61755-3-1 grade 1
Free cable connectors
Straight connectors
Fixed connectors
Flange mounting
IEC  731/10
Single hole mounting
Adapters
Feed-through
61076-2-107 © IEC:2010 – 7 –
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2–107: Detail specification for circular hybrid connectors M12
with electrical and fibre-optic contacts with screw locking

1 General information
1.1 Scope
This standard describes circular M12 connectors typically used for industrial process
measurement and control. These connectors consist of fixed and free connectors with screw-
locking as well as adaptors.
The connectors are suitable to connect two optic fibres and two electrical wires intended for
power transmission to the optionally integrated transmitter and receiver, not specified in this
standard.
Male connectors have round electrical contacts Ø 1,0 mm and round optical contacts with the
ferrule Ø 1,25 mm according to IEC 61754-20, grade 1 for
All-silica optical fibre cables
single mode fibre 9/125 μm
multimode fibre 50/125 μm or 62,5/125 μm
NOTE M12 is the dimension of the thread of the screw locking mechanism of these circular connectors.
Throughout this standard dimensions are in mm.
1.2 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.
IEC 60050 (581): 2008, International Electrotechnical Vocabulary (IEV): Part 581:
Electromechanical components for electronic equipment
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
Amendment 1 (1992)
IEC 60352 (all parts), Solderless connections
IEC 60512-1-100: Connectors for electronic equipment – Tests and measurements – Part 1-
100: General – Applicable publications
IEC 60529:2001, Degrees of protection provided by enclosures (IP code)
IEC 60664-1: Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60793-2-40, Optical fibres – Part 2-40: Product specifications – Sectional specification for
category A4 multimode fibres
– 8 – 61076-2-107 © IEC:2010
IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres
IEC 60998-2-1:2002, Connecting devices for low-voltage circuits for household and similar
purposes – Part 2-1: Particular requirements for connecting devices as separate entities with
screw-type clamping units
IEC 60999-1:1999, Connecting devices – Electrical copper conductors - Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and
2 2
particular requirements for clamping units for conductors from 0,2 mm up to 35 mm
(included)
IEC 61076-1:2006, Connectors for electronic equipment – Product requirements – Part 1:
Generic Specification
IEC 61300-2-1:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-2:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-2: Tests – Mating durability
IEC 61300-2-4:1995, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-5:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-5: Tests – Torsion
IEC 61300-2-26:2006, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-26: Tests – Salt mist
IEC 61300-2-27:1995, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 2-27: Tests – Dust – Laminar flow
IEC 61300-3-4:2001, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-4: Examinations and measurements – Attenuation
IEC 61300-3-6:2008 Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-10:2006, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-10: Examinations and measurements – Gauge
retention force
IEC 61300-3-34:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-34: Examinations and measurements –
Attenuation of random mated connectors
IEC 61753-022-2, Fibre optic interconnecting devices and passive components performance
standard – Part 022-2: Fibre optic connectors terminated on multimode fibre for category C –
Controlled environment
IEC 61754-20:2002, Fibre optic connector interfaces – Part 20: Type LC connector family
IEC 61755-2-1, Fibre optic connector optical interfaces – Part 2-1: Optical interface standard
single mode non-angled physically contacting fibres

61076-2-107 © IEC:2010 – 9 –
IEC 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 61984: 2008, Connectors – Safety requirements and tests
EN 50377-7-4, Connector sets and interconnect components to be used in optical fibre
communication systems – Product specifications – Part 7-4: Type LC-PC simplex terminated
on IEC 60793-2 category B1.1 singlemode fibre
ISO 1302: Geometrical Product Specifications (GPS) – Indication of surface texture in
technical product documentation
1.3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050 (581) apply.
1.4 Recommended method of termination
The electrical contact terminations shall be of the following types: screw, crimp, insulation
piercing, insulation displacement, press-in or solder.
The optical contact terminations shall be defined between manufacturer and user.
1.5 Ratings and characteristics
1.5.1 Electrical contacts
Rated voltage : 250 V d.c. or a.c.
Rated current : 4 A
Insulation resistance : min. 10 Ω
Climatic category : see 4.1 Table 11
Contact spacing : see Clause 3
1.5.2 Optical contacts
Dimensions for ferrule and end face:
– for singlemode fibre according to ferrule grade 1 of IEC 61754-20;
– for multimode fibre according to ferrule grade 2 of IEC 61754-20.
Insertion loss: see 4.3.2
Return Loss: see 4.3.4
Contact force: ferrule compression force shall be 5-6 N
Climatic category: see 4.1, Table 11
Contact spacing: not applicable

– 10 – 61076-2-107 © IEC:2010
1.6 Marking
The marking of the connector and the package shall be in accordance with 2.6 of
IEC 61076-1.
1.7 Safety aspects
For safety aspects IEC 61984 shall be considered unless otherwise specified.
2 Technical information
All dimensions in mm.
2.1 Mounting orientation
Circular mounting position of the connector in relation to the polarization of the mating
interface.
2.2 Survey of styles and variants
For all connector styles with cables the length L of the cable shall be agreed between
manufacturer and user.
For interface dimensions see 3.2.
The interface dimensions of the female styles shall be chosen according to the common
characteristics of the male styles.
2.2.1 Fixed connectors
Table 1 – Styles of fixed connectors
Style Description
AF Fixed connector, electrical female contacts, single hole mounting thread M16 × 1,5, mounting orientation
BF
Fixed connector, electrical female contacts, for feed through, single hole mounting thread M16 × 1,5
2.2.1.1 Style AF
A
Sealing
Optical reference plane
IEC  732/10
Figure 1 – Fixed connector, electrical female contacts,
single hole mounting thread M16 × 1,5, mounting orientation
B
61076-2-107 © IEC:2010 – 11 –
Table 2 – Dimensions for connector style AF
All dimensions in mm
Symbol Value
A 8,9
B
mounting thread M16 × 1,5
2.2.1.2 Style BF
A
(B)
Optical reference plane
C
D
Position free
to flange
F
IEC  733/10
Figure 2 – Fixed connector, electrical female contacts, for feed through,
single hole mounting thread M16 × 1,5
Table 3 – Dimensions for connector style BF
All dimensions in mm
Value
Symbol
Min. Nominal Max.
A  20,5
B 10,25
C 8,55 8,85 9,15
D 2,75 2,85 2,95
E --
M16 × 1,5 -6g
a
F SW 21
G  Ø 23,2
a
SW has the meaning of a wrench size across flats.

E
∅G
– 12 – 61076-2-107 © IEC:2010
2.2.2 Free connectors
Table 4 – Styles of free connectors
Style Description
CM Free connector, straight version, with locking nut, male contacts

2.2.2.1 Style CM
1)
B
IEC  734/10
Key
1)
Cable outlet diameter upon agreement.
Figure 3 – Free connector, straight version, with locking nut, male contacts
Table 5 – Dimensions for connector style CM
All dimensions in mm
Value
Symbol
Min. Nominal Max.
A  Ø 21
B  82
2.2.3 Adaptor
Table 6 – Styles of adaptors
Style Description
DF Adaptor, straight version, without locking nut

∅A
61076-2-107 © IEC:2010 – 13 –
2.2.3.1 Style DF
A
(B)
Optical reference plane
C D
Keying
∅F
∅E
IEC  735/10
Figure 4 – Adaptor, straight version, without locking nut
Table 7 – Dimensions for adaptor style DF
All dimensions in mm
Value
Symbol
Min. Nominal Max.
A  20,5
B 10,25
C 5,775 6,05 6,425
D 5,775 6,05 6,425
E  Ø 16,2
F  Ø 16,2
3 Dimensions
3.1 General
All dimensions in millimetres are original. Drawings are shown in the first angle projection.
The shape of the connectors may deviate from those given in the following drawings as long
as the specified dimensions are not influenced.
For connector dimensions and interface dimensions see 2.2.

– 14 – 61076-2-107 © IEC:2010
Missing dimensions shall be chosen according to common characteristics and intended use.
The contact marking shall be on the termination side of the connector insert as long as the
size of the component allows the placement there.
3.2 Interface dimensions
3.2.1 Pin front view plug connector

K
L
B
G
M
F H
J
∅0,1
A
D
A
Q
E
IEC  736/10
Figure 5 – Pin front view plug connector
∅A
C
I
∅N
∅O
P
61076-2-107 © IEC:2010 – 15 –
Table 8 – Dimensions for front view plug connector
All dimensions in mm, except angles for H
Value
Symbol in Figure 5
Min. Nominal Max.
a
A
B 5,25 5,3 --
C  2,8
D 8,7 8,9 --
b
E mated 8,6
b
E unmated 10,38 11,18
F -- 7,1 7,25
G 5,2
H 52° 52,5° 53°
I 5
J Ø 0,97 Ø 1 Ø 1,03
K 10
L  3
M 0 0,5 --
N -- Ø 8,3 Ø 8,45
O Ø 10,2 Ø 10,5 --
P
M12 × 1
Q 6,7 6,9 7,1
a
Dimensions Ø A and shape of ferrules in accordance with IEC 61754-20, detail Aa to Figure 1 and Table
1b (grade 1 for singlemode, grade 2 for multimode).
b
Dimension E unmated is given for a plug end face when not mated. The ferrule is movable by a certain
axial compression force, with direct contacting end face, and therefore dimension E is variable.

3.3 Engagement (mating) information
Arrows in Figure 6 indicate mating direction.
l l
IEC  737/10 IEC  738/10
Figure 6a – Housing variant 1 Figure 6b – Housing variant 2
Figure 6 – Engagement (mating) information
∅d
∅d1
∅d
– 16 – 61076-2-107 © IEC:2010
Table 9 – Dimensions for connectors type D in mated position
All dimensions in mm
Figure Combination of styles d max. d1 l* max.
6a AF-CM Ø 21 Ø 26,2 65
6a BF-CM Ø 21 Ø 26,2 65
6b CM-DF-CM Ø 21 --- 130
* Dimensions in mated position, additional space for insertion: 15 mm.

3.4 Gauges for electric contacts
Sizing gauges and retention force gauges
Material: tool steel, hardened

= Surface (clean and free of grease)
roughness according to ISO 1302: Ra = 0,25 μm max, 0,15 μm min

R
l
IEC  739/10
Figure 7 – Gauge dimensions
Table 10 – Gauges
Mass l min
∅ a Nom pin ∅
Gauge Application
g mm
mm mm
P11 - Sizing 1,03 10
± 0,03
1,0
P12 20 Retention 0,97 10
force
4 Characteristics
4.1 Climatic category
Conditions: IEC 60068-1
Table 11 – Climatic category
Category temperature Damp heat, steady state
Climatic
Days
Lower Upper Temperature Rel. humidity
category
°C °C °C %
25/85/21 -25 [phone]
∅a
61076-2-107 © IEC:2010 – 17 –
4.2 Electrical characteristics (only electrical contacts)
4.2.1 Rated voltage – Impulse voltage – Pollution degree
Conditions: IEC 60664-1
The permissible rated voltage depends on the application or specified safety requirement.
Reductions in creepage or clearance distances may occur due to the printed board or wiring
used and shall be duly taken into account.
Table 12 – Rated voltage – Impulse voltage – Pollution degree
Rated voltage Rated impulse voltage Pollution
V kV degree
250 2,5 3
NOTE Only in mated and locked condition.
Due to the accessibility of the male contacts the rated voltage shall be
reduced to 50 V SELV/PELV.
4.2.2 Voltage proof
Conditions: IEC 60512, Test 4a
Standard atmospheric conditions
Mated connectors
Table 13 – Voltage proof
Between contacts Between contacts and metal
r.m.s. withstand voltage housing
Fixed Free Fixed Free
connectors connectors connectors connectors
kV kV kV kV
1,4 1,4 1,4 1,4
4.2.3 Current-carrying capacity
Conditions: IEC 60512, Test 5b
All contacts
Values at 40 °C 4 A
– 18 – 61076-2-107 © IEC:2010
4.2.4 Contact resistance
Conditions: IEC 60512, Test 2a
Standard atmospheric conditions
Connecting points see 5.1.1
4.2.5 Insulation resistance
Conditions: IEC 60512, Test 3a, Method A
Standard atmospheric conditions

Test voltage 500 V ± 15 V d.c.

4.3 Optical characteristics (only optical contacts)
4.3.1 Dimensions for ferrule and end face
– for singlemode optical fibre according to IEC 60793-2-50, B1.1;
– for multimode optical fibre according to IEC 60793-2-40.
4.3.2 Insertion loss (reference)
Singlemode optical fibre in accordance with IEC 61755-2-1, Grade C
max. 0,5 dB
Multimode optical fibre in accordance with IEC 61753-022-2
max. 0,3 dB
4.3.3 Insertion loss (random mate)
Singlemode optical fibre in accordance with IEC 61755-2-1, Grade C

mean 0,25 dB
max. 0,5 dB (for > 97 % of measurements)
Multimode optical fibre in accordance with IEC 61753-022-2 class M
mean 0,35 dB
max. 0,5 dB (for >95 % of
measurements)
4.3.4 Return loss (random mate)
Singlemode fibre contacts according to EN 50377-7-4, Table 8:

61076-2-107 © IEC:2010 – 19 –
Grade 2: min. 45 dB
Grade 3: min. 30 dB
Grade 4: min. 26 dB
Multimode optical fibre in accordance with IEC 61753-022-2 class M
min. 20 dB
4.4 Mechanical
4.4.1 IP degree of protection
IP65 and IP67 according to IEC 60529 connectors in mated and locked position.
IP68 as agreed between manufacturer and user.
4.4.2 Mechanical operation
Conditions: IEC 60512, Test 9a and
IEC 61300-2-2 (optical fibre contacts)
Standard atmospheric conditions
Max. speed of operations = 10 mm/s
Rest: 30 s, unmated
Table 14 – Number of mechanical operations
Contact finish Mechanical operations
Gold 100
Silver 50
Tin 20
a
Other types
a
other ma
...