EN 3733-104:2008

Overview

EN 3733-104:2008 is a European standard developed by CEN under the Aerospace series. It specifies the product standard for a receptacle connector dummy with four holes fixing, designed for optical circular single-channel connectors used in aerospace applications. The connectors are coupled by a self-locking ring and rated for operating temperatures up to 150 °C continuous.

The standard defines the essential characteristics, dimensions, materials, and mounting requirements for this specific dummy receptacle connector type. It provides consistency and interchangeability in aerospace fibre optic cabling, contributing to reliable electrical and optical system integration in aerospace and defense sectors.

Key Topics

• Scope and Purpose
  EN 3733-104:2008 focuses on the mechanical and design specifications for a dummy receptacle connector with four holes fixing, compatible with single-channel fibre optic plug connectors. The dummy connector serves as a placeholder or protective element in fibre optic installations.

• Operating Temperature
  The dummy receptacle is designed to withstand continuous operation at temperatures up to 150 °C, supporting high-temperature aerospace environments.

• Physical Dimensions
  The connector interface dimensions are standardized as per detailed figures in the document. These include precise measurements for panel cut-outs, mounting hole sizes (typical Ø 3.10 ± 0.05 mm for fixing holes), and maximum panel thickness for rear mounting (3.0 mm).

• Materials
  The shell is made of nickel-copper, ensuring robustness and corrosion resistance. It incorporates a fluorosilicone seal for environmental protection and sealing performance.

• Compatibility and Interchangeability
  This dummy receptacle supports universal keying to accommodate any plug connector keyway orientation, promoting ease of use and broad interoperability with connectors specified in EN 3733-003 and accessory listings in EN 3733-002.

• Designation and Marking
  A structured designation system is used to identify product types and classes, ensuring clear product coding and traceability in line with EN 3733-002 and EN 3733-001 standards.

• Test and Qualification
  The dummy receptacle connectors are qualified by referencing the qualification requirements of EN 3733-004 (receptacle connector with four holes fixing), ensuring rigorous performance standards are met.

Applications

• Aerospace Fibre Optic Systems
  Ideal for use in aerospace environments where robust, high-temperature capable optical connectors are required for fiber optic data transmission and signaling.

• Defence Electronics
  Suitable for military-grade optical interconnects requiring durability under demanding thermal and mechanical stresses.

• Optical Connector Testing and Maintenance
  Use as a protective dummy connector during fiber optic system assembly, testing, or maintenance to safeguard connector interfaces.

• Environmental Protection
  Provides a secure closure and environmental seal for unused receptacle interfaces to prevent contamination and damage.

Related Standards

• EN 3733-001 – Technical Specification
  Details connector interface dimensions, test tables, and qualification criteria essential for applying EN 3733-104.

• EN 3733-002 – List of Product Standards
  Includes codification, product type listings, and combinations relevant for aerospace optical connectors.

• EN 3733-003 – Plug Connector Standard
  Covers the plug connectors designed for cable termination that mate with receptacles covered in EN 3733-104.

• EN 3733-004 – Receptacle Connector with Four Hole Fixing
  Defines product standards and qualification criteria for active receptacle connectors that also apply in a read-across manner for dummy counterparts.

• EN 2591-100 – Test Methods for Electrical and Optical Connections
  Provides general test methods applicable to aerospace electrical and optical connectors referenced in the EN 3733 series for quality assurance.

Keywords: aerospace optical connectors, fibre optic dummy receptacle, circular connector, self-locking ring, high-temperature connectors, EN 3733-104 standard, fibre optic panel mount, aerospace standard, connector four holes fixing, military optical connectors.