SIST EN 3733-103:2008

• Abstract:

  This standard specifies the characteristics of protective covers for single channel fibre optic jam nut receptacle connectors, operating temperature up to 150 °C.; Connector interface dimensions, table of tests and qualification approval requirements, are contained in the Technical Specification EN 3733-001. EN 3733-002, List of product standards, includes the listings of product types, codification and applicable combinations of product types.

• Status: Published
• Publication Date: 27-May-2008
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-May-2008
• Due Date: 14-Jul-2008
• Completion Date: 28-May-2008
• Ref Project: EN 3733-103:2008 - Aerospace series - Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature up to 150 °C continuous - Part 103: Protective cover jam nut receptacle - Product standard

• Refers: SIST EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3733-001:2009 - Aerospace series - Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature up to 150 °C continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Refers: SIST EN 3733-006:2008 - Aerospace series - Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature 150 °C continuous - Part 006: Receptacle, connector, jam nut fixing for cable according to EN 4532, product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 60695-11-10:2014 - Fire hazard testing - Part 11-10: Test flames - 50 W horizontal and vertical flame test methods
• Effective Date: 09-Feb-2026
• Referred By: SIST EN 3733-002:2008 - Aerospace series - Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature 150 °C continuous - Part 002: List of product standards
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 527-1:2012 - Plastics - Determination of tensile properties - Part 1: General principles (ISO 527-1:2012)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4533-004:2018 - Aerospace series - Fibre optic systems - Handbook - Part 004: Repair, maintenance, cleaning and inspection
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 178:2011 - Plastics - Determination of flexural properties (ISO 178:2010)
• Effective Date: 28-Jan-2026

SIST EN 3733-103:2008 is the Slovenian adoption of EN 3733-103:2008, a CEN aerospace product standard prepared by ASD-STAN. It specifies the characteristics of protective covers for single-channel fibre optic jam nut receptacle connectors used at continuous operating temperatures up to 150 °C, so manufacturers, buyers, and test labs can identify the correct cover type and how it is qualified.

What does SIST EN 3733-103:2008 specify?

SIST EN 3733-103:2008 specifies the protective cover for a specific connector family: single channel fibre optic jam nut receptacle connectors. The standard is a product standard within the EN 3733 series, and it works together with companion documents that provide the connector interface data, product listings, and test basis.

The document is organized into seven clauses:

• scope
• normative references
• terms and definitions
• required characteristics
• designation
• marking
• technical specification

Clause 4 contains the product characteristics, while the other clauses point to the standards needed to identify, mark, and qualify the part in practice.

What are the key requirements of SIST EN 3733-103:2008?

Product scope and compatibility

SIST EN 3733-103:2008 applies to protective covers for single channel fibre optic jam nut receptacle connectors intended for continuous operation up to 150 °C. In practice, this means the cover is part of an aerospace connector system and must match the receptacle type used in that family.

The standard also links compatibility to EN 3733-006 and to the product combinations listed in EN 3733-002. For a buyer or engineer, that means the cover is not selected in isolation - it must be checked against the approved connector types.

Physical characteristics

SIST EN 3733-103:2008 gives the cover dimensions in Figure 1 and states a maximum mass. That is the key fit-and-packaging information for manufacturing, inspection, and interchangeability.

Clause 4.2 specifies the material set used for the cover assembly: nickel-copper alloy for the cover, nylon cord, and a fluorosilicone seal. In practice, this tells procurement and quality teams what material family the part must be built from and what to check on incoming parts.

Application combinations

SIST EN 3733-103:2008 limits use of the protective cover to product standards conforming to EN 3733-006. The standard also points the reader to EN 3733-002 for the allowed combinations of protective covers and connectors.

This matters because the part must protect the correct receptacle interface, not just any connector in the series. The combination control helps avoid ordering a cover that fits the wrong connector variant.

Designation and identification

SIST EN 3733-103:2008 gives a designation format in clause 5. The example shows how the description block and identity block are combined, and it includes the class reference tied back to EN 3733-001.

For ordering, cataloguing, and traceability, this is the part that tells users how the item is named in the EN 3733 family. The note about code I9005 shows that an extra code may be inserted when needed.

Marking and qualification

SIST EN 3733-103:2008 sends marking requirements to EN 3733-001. It also states that protective covers are qualified when they pass the applicable qualification requirements of EN 3733-001.

In practice, this means the detailed test and approval rules are not repeated here. The engineer or quality manager must use the companion technical specification for the actual qualification program.

What terms does SIST EN 3733-103:2008 define?

Clause 3 adopts the terms and definitions from EN 2591-100. The standard therefore relies on the common EN 2591-100 vocabulary for this connector family.

• Protective cover - the cover fitted to protect the connector receptacle interface when it is not in use.
• Jam nut receptacle - the receptacle type fixed by a jam nut, used as the connector interface covered by this standard.
• Single channel - a one-channel optical connector arrangement in this EN 3733 family.
• Product standard - the part of the EN 3733 series that specifies one product type and its characteristics.
• Qualification requirements - the test and approval basis used to show that the part meets the standard.
• CEN - the European Committee for Standardization, which approved the European Standard.
• ASD-STAN - Aerospace and Defence Industries Association of Europe - Standardization, the drafting body named in the foreword.

Who uses SIST EN 3733-103:2008?

SIST EN 3733-103:2008 is used by aerospace connector manufacturers, optical interconnect suppliers, quality engineers, and test laboratories. It is also relevant to buyers and integrators who need to specify the correct protective cover for EN 3733-006 receptacles.

In practice, users apply it when selecting parts, writing product designations, checking material and dimensional conformity, and planning qualification testing. It is also useful for cataloguing and procurement because the designation and product combination rules support consistent ordering.

Which standards are used with SIST EN 3733-103:2008?

• EN 2591-100 - provides the general test methods and the terms and definitions used by this document.
• EN 3733-001 - provides the technical specification for the connector family, including interface dimensions, test table, qualification approval requirements, and marking reference.
• EN 3733-002 - lists the product standards, codification, and applicable combinations of product types.
• EN 3733-006 - covers the jam nut fixing receptacle connector that the protective cover is intended to fit.

What does the SIST EN 3733-103:2008 document contain?

SIST EN 3733-103:2008 contains a figure with the cover envelope dimensions and mass limit, a material description for the cover assembly, and a designation example showing how the part is identified. It also gives the compatibility rule for use with EN 3733-006 product standards and points to EN 3733-002 for valid combinations.

The document does not repeat the detailed test programme. Instead, it directs users to EN 3733-001 for the qualification and marking basis, which is the practical route for testing, approval, and controlled use within the series.

SLOVENSKI STANDARD
01-julij-2008
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Aerospace series - Connector, optical, circular, single channel, coupled by self-locking
ring, operating temperature up to 150 °C continuous - Part 103: Protective cover jam nut
receptacle - Product standard
Luft- und Raumfahrt - Optischer Rundsteckverbinder einpolig Schraubkupplung,
Betriebstemperatur 150 °C konstant - Teil 103: Schutzkappe, fester Steckverbinder mit
Mutternbefestigung - Produktnorm
Série aérospatiale - Connecteur optique circulaire monovoie à accouplement par bague
filetée, température d'utilisation 150 °C continu - Partie 103 : Bouchon de vol pour
embase à fixation par écrou - Norme de produit
Ta slovenski standard je istoveten z: EN 3733-103:2008
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 3733-103
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 49.060
English Version
Aerospace series - Connector, optical, circular, single channel,
coupled by self-locking ring, operating temperature up to 150 °C
continuous - Part 103: Protective cover jam nut receptacle -
Product standard
Série aérospatiale - Connecteur optique circulaire Luft- und Raumfahrt - Optischer Rundsteckverbinder
monovoie à accouplement par bague filetée, température
einpolig Schraubkupplung, Betriebstemperatur 150 °C
d'utilisation 150 °C continu - Partie 103 : Bouchon de vol konstant - Teil 103: Schutzkappe, fester Steckverbinder mit
pour embase à fixation par écrou - Norme de produit Mutternbefestigung - Produktnorm
This European Standard was approved by CEN on 19 January 2008.

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,
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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 3733-103:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Required characteristics.4
5 Designation .6
6 Marking .6
7 Technical specification .
...