EN 4626-001:2008

Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures -65 °C to 125 °C (cable dependent) - Flush contacts - Part 001: Technical specification

This standard specifies the general characteristics, the conditions for qualification, acceptance and quality assurance, as well as the test programs and groups for fibre sub-assembly contact in rack and panel connectors, intended for use in a temperature range from  65 °C to 125 °C continuous (cable dependent).
This standard specifies a pair of adaptors to fit with standard Quadrax cavities and EN 4531-101 optical contact.

Luft- und Raumfahrt - Optische Rechtecksteckverbinder, Mehrfachkontakt, Einschub, Quadrax-Kontaktkammer, Ferrulendurchmesser 2,5 mm - Betriebstemperaturen -65 °C bis 125 °C (vom Kabel abhängig) - Bündige Kontakte - Teil 001: Technische Lieferbedingungen

Série aérospatiale - Connecteurs, optique, rectangulaire, à contacts multiples, rackables, cavité Quadrax, ferrule diamètre 2,5 mm - Température d'utilisation -65 °C à 125 °C (selon câble) - Contacts affleurants - Partie 001: Spécification technique

Aeronavtika - Konektorji, optični, pravokotni, večkontaktni, s stojalom in ploščo, vdolbina Quadrax, s premerom kapice 2,5 mm - Delovna temperatura - 65 °C do 125 °C (odvisna od kabla) - Izravnani kontakti - 1. del: Tehnična specifikacija

General Information

• Status: Published
• Publication Date: 12-Aug-2008
• Withdrawal Date: 27-Feb-2009
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2 - Electrical
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 21-Jan-2024
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 4626-001:2008 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 001: Technical specification

Relations

• Refers: EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: EN 4626-002:2008 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 002: Specification of performance and contact arrangements
• Effective Date: 28-Jan-2026
• Refers: EN 4531-101:2016 - Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 101: Optical contact for EN 4641 multimode cable -55 °C to 125 °C - Product standard
• Effective Date: 28-Jan-2026
• Refers: EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Refers: EN 3197:2010 - Aerospace series - Design and installation of aircraft electrical and optical interconnection systems
• Effective Date: 28-Jan-2026
• Referred By: EN 4626-201:2009 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 201: Optical contact (sub-assembly) for receptacle - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 4626-003:2008 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 003: Adaptor for plug
• Effective Date: 28-Jan-2026
• Referred By: EN 4626-101:2008 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 101: Optical contact (sub-assembly) for plug - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 4626-004:2008 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 004: Adaptor for receptacle
• Effective Date: 28-Jan-2026
• Referred By: EN 4626-202:2009 - Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C (cable dependent) - Flush contacts - Part 202: Optical contact assembly for 900 µm buffered fibre receptacle - Product standard
• Effective Date: 28-Jan-2026
• Referred By: CEN ISO/TS 11133-2:2003 - Microbiology of food and animal feeding stuffs - Guidelines on preparation and production of culture media - Part 2: Practical guidelines on performance testing of culture media (ISO/TS 11133-2:2003)
• Effective Date: 28-Jan-2026

Overview

EN 4626-001:2008 is a European Standard developed by CEN as part of the aerospace series, focusing on the technical specification for optical, rectangular, multicontact rack and panel connectors with a Quadrax cavity and 2.5 mm diameter ferrule. This standard applies to fibre optic contact sub-assemblies designed for use in environments with continuous operating temperatures ranging from -65 °C to 125 °C (cable dependent), commonly found in aerospace electric equipment and systems. It defines the general characteristics, requirements for qualification, acceptance, and quality assurance, as well as testing protocols for ensuring product reliability and conformity.

Key Topics

• Connector Design and Sub-assemblies:
  EN 4626-001 covers the technical parameters for fibre optic connectors, including mating interfaces, Quadrax cavity arrangements, and the integration of EN 4531-101 optical contacts within ARINC 600 housing.

• Temperature and Environmental Resistance:
  The standard specifies the use of optical contacts and adaptors designed to withstand a broad temperature range, making them suitable for harsh aerospace conditions.

• Testing Methodologies:
  It refers to test programs laid out in EN 2591-100 and related standards, ensuring connectors meet critical criteria such as mechanical endurance, vibration, shock resistance, insertion and return loss, and cleaning capability of optical faces.

• Quality Assurance and Qualification:
  Outlines procedures for type approval, ongoing quality control, and product marking in line with EN 9133 and EN 4626-002 for manufacturing consistency and traceability.

Applications

EN 4626-001:2008 is primarily intended for:

• Aerospace on-board optical interconnects:
  Used in rack and panel equipment, ensuring reliable data transmission and system integration across aircraft cabins, avionics racks, and control systems.

• High-performance industrial environments:
  The rigorous test requirements and broad temperature suitability make these connectors ideal for use in defense, transportation, and other industries requiring robust fibre optic solutions.

• Integration with existing standards:
  Adapters designed per EN 4626-001 interface standard Quadrax cavities and EN 4531-101 contacts, facilitating streamlined maintenance and interchangeability with established ARINC 600 connectors.

Practical Value:

• Enhanced Reliability:
  Compliance with EN 4626-001 ensures connectors perform dependably under demanding vibration, shock, and temperature cycling typical of aerospace environments.

• Efficient Maintenance:
  Sub-assemblies offer features such as flush contacts and keyed adaptors for precise alignment and streamlined cleaning or replacement, minimizing maintenance time and costs.

• Quality Control:
  The standard mandates systematic inspection, rigorous documentation, and traceability, bolstering confidence for manufacturers and integrators.

Related Standards

EN 4626-001:2008 references and is closely associated with several key standards:

• EN 2591-100: Methods for testing electrical and optical connection elements in aerospace.
• EN 4531-101: Product standard for optical contacts used in these connectors.
• EN 4626-002: Extension covering performance and contact arrangements.
• EN 9133: Aerospace standard for quality management and qualification procedures.
• ARINC 600: Specification for equipment interfaces in air transport avionics.
• EN 3197: Installation guidance for electrical and optical interconnections in aircraft.

These related standards ensure a harmonized framework for selecting, testing, and deploying optical connectors in aerospace and other critical sectors.

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Keywords: EN 4626-001:2008, aerospace series, optical connectors, Quadrax cavity, multicontact connectors, fibre optic sub-assemblies, rack and panel connectors, ARINC 600, EN 4531-101, test methods, aerospace quality assurance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2008
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Aerospace series - Connectors, optical, rectangular, multicontact, rack and panel,
Quadrax cavity, 2,5 mm diameter ferrule - Operating temperatures - 65 °C to 125 °C
(cable dependent) - Flush contacts - Part 001: Technical specification
Luft- und Raumfahrt - Optische Rechtecksteckverbinder, Quadrax-Kontaktkammer,
Durchmesser 2,5 mm Ferrule - Betriebstemperaturen - 65 °C bis 125 °C (vom Kabel
abhängig) - Bündige Kontakte - Teil 001: Technische Lieferbedingungen
Série aérospatiale - Connecteurs, optique, rectangulaire, à contacts multiples, rackables,
cavité Quadrax, ferrule diamètre 2,5 mm - Température d'utilisation - 65 °C à 125 °C
(selon câble) - Contacts affleurants - Partie 001: Spécification technique
Ta slovenski standard je istoveten z: EN 4626-001:2008
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 4626-001
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2008
ICS 49.060
English Version
Aerospace series - Connectors, optical, rectangular,
multicontact, rack and panel, Quadrax cavity, 2,5 mm diameter
ferrule - Operating temperatures - 65 °C to 125 °C (cable
dependent) - Flush contacts - Part 001: Technical specification
Série aérospatiale - Connecteurs, optique, rectangulaire, à Luft- und Raumfahrt - Optische Rechtecksteckverbinder,
contacts multiples, rackables, cavité Quadrax, ferrule
Quadrax-Kontaktkammer, Durchmesser 2,5 mm Ferrule -
diamètre 2,5 mm - Température d'utilisation - 65 °C à 125 Betriebstemperaturen - 65 °C bis 125 °C (vom Kabel
°C (selon câble) - Contacts affleurants - Partie 001: abhängig) - Bündige Kontakte - Teil 001: Technische
Spécification technique Lieferbedingungen
This European Standard was approved by CEN on 28 December 2007.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN 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 CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4626-001:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction .4
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Description .5
5 Design .5
6 Drawings.6
7 Tests.9
8 Quality assurance.12
9 Designation and marking.15

Foreword
This document (EN 4626-001:2008) has been prepared by the Aerospace and Defence Industries Association
of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2009, and conflicting national standards shall be withdrawn
at the latest by February 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Introduction
This family of fibre optic contact sub-assemblies are suitable for use in ARINC 600 connectors with
size 8 Quadrax cavities in aerospace onboard applications. It provides easy access for optical contact end
face cleaning.
1 Scope
This standard specifies the general characteristics, the conditions for qualification, acceptance and quality
assurance, as well as the test programs and groups for fibre sub-assembly contact in rack and panel
connectors, intended for use in a temperature range from − 65 °C to 125 °C continuous (cable dependent).
This standard specifies a pair of adaptors to fit with standard Quadrax cavities and EN 4531-101 optical contact.
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 2591-100 , Aerospace series — Elements of electrical and optical connection — Test methods — Part 100:
General
1)
EN 3197, Aerospace series — Installation of aircraft electrical and optical interconnection systems
EN 4531-101, Aerospace series — Connectors, optical, circular, single and multipin, coupled by threaded ring —
1)
Flush contacts — Part 101: Optical contact for EN 4641-100 cable − 55 °C to 125 °C — Product standard
EN 4626-002, Aerospace series — Connectors, optical, rectangular, multicontact, rack and panel, Quadrax
cavity, 2,5 mm diameter ferrule — Operating temperatures − 65 °C to 125 °C (cable dependent) — Flush
contacts — Part 002: Specification of performance and contact arrangements
EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace
standard parts
2)
ARINC 600, Air transport avionics — Equipment interfaces
3 Terms and definitions
For the purposes of this standard, the terms, definitions and abbreviations given in EN 2591-100 apply.

*
And all its parts quoted in this standard.
1) Published as ASD Prestandard at the date of publication of this standard.
2) Published by: Aeronautical Radio, Inc. 2551 Riva road, Annapolis, Maryland 21401.
4 Description
4.1 Optical sub-assembly and adaptor
The optical sub-assembly comprises of an EN 4531-101 fibre optic contact, male and female adaptors
allowing positioning of the fibre optic contact in either a plug or receptacle Quadrax size 8 cavity or a single
part which integrates the EN 4531-101 contact and adaptor.
The female adaptor is characterised by the integral alignment sleeve providing precise alignment of the optical
ferrules.
The optical contact sub-assemblies are polarized by means of keyways in the adaptors and keys on the
contact body.
4.2 Materials and surface treatment
4.2.1 Requirements
When dissimilar metals are in close contact, adequate protection against corrosion shall be used for the
electromotive force of the cell not to exceed 0,25 V (see EN 3197).
4.2.2 Housing and inserts
The connector housing and insert arrangement information are detailed in ARINC 600 standards.
4.2.3 Optical contacts
Details of the optical contacts and alignment sleeves are detailed in EN 4531-101.
4.2.4 Adaptor
The adaptor shall be of suitable material as specified in the product standard.
5 Design
5.1 Housing
Connector housing is defined in the ARINC 600 standard. Quadrax cavity arrangements will be defined in
Technical Report in preparation.
5.2 Optical contact
See EN 4531-101.
5.3 Adaptor
The adaptor is designed to provide mechanical retention and accurate alignment of the EN 4531-101 fibre
optic contact within an ARINC 600 housing containing Quadrax size 8 cavities.
The adaptor is keyed and mechanically retained in the ARINC 600 Quadrax size 8 insert cavity.
The design permits installation of individual adaptors and contacts without removal of the connertor insert.
Fitting and removal of the adaptor will be from the rear of the connec
...