SIST EN 3733-007:2008

Overview

SIST EN 3733-007:2008 is a European standard developed by CEN that specifies the characteristics of ferrules (optical contacts) for aerospace series optical connectors. These connectors are circular, single channel, and coupled by a self-locking ring, designed to operate continuously at temperatures up to 150 °C. This part focuses specifically on the ferrule component used with EN 4532 cables containing 200 µm/280 µm single core optical fibre.

This standard supports high-reliability optical interconnect systems used in aerospace applications, emphasizing precision, durability, and compatibility with relevant product families.

Key Topics

• Ferrule Characteristics: Defines dimensional tolerances, mass limits (max 0.7 g), and materials used such as zirconia ceramic and nickel-copper alloy to ensure durability and performance in demanding aerospace environments.

• Operating Environment: Supports continuous operating temperatures up to 150 °C, meeting the thermal requirements typical in aerospace applications.

• Compatibility: Integrates with connector assemblies adhering to related product standards (EN 3733-003 to EN 3733-006, EN 3733-008, EN 3733-009), ensuring design uniformity and interchangeability.

• Design and Dimensions: Includes detailed component design with specifications for features like chamfers and keyways to assure proper alignment and secure mating within connector assemblies.

• Qualification and Testing: Although this document does not cover tests directly, qualification follows EN 3733-001, which outlines interface dimensions, testing protocols, and approval processes, guaranteeing standardized performance and reliability.

Applications

EN 3733-007 ferrules are critical components for single channel optical fibre connectors used extensively in aerospace systems where reliable high-speed data transmission is essential. Typical applications include:

• Avionics communication systems requiring high temperature-resistant optical connections
• Aircraft and spacecraft harnesses demanding precision optical interconnections
• Military and defense aerospace systems where environmental robustness and signal integrity are mandatory
• High-performance optical sensor interfaces operating within thermal extremes

These ferrules facilitate consistent fiber alignment and mechanical protection within circular optical connectors, supporting data transmission in critical aerospace communication and control systems.

Related Standards

For comprehensive implementation and design compatibility, EN 3733-007 should be used in conjunction with the following standards:

• EN 4532: Technical specification for aerospace series single core 200 µm/280 µm fibre optical cables, which the ferrule interfaces with.
• EN 3733-001: Technical specification covering connector interface dimensions, testing methods, and qualification approval essential for full connector system certification.
• EN 3733-002: Catalog of product standards, codification, and applicable combinations related to the aerospace series optical connectors.
• EN 3733-003 to EN 3733-006, EN 3733-008, EN 3733-009: Product standards covering plug connectors, various receptacle configurations, and sub-assemblies for the full connector assembly.

These interconnected standards collectively ensure a harmonized approach to design, manufacturing, testing, and application of optical circular connectors in aerospace environments.

SIST EN 3733-007:2008 provides a critical specification for ferrule components within high-performance aerospace optical connectors, enabling engineers and manufacturers to meet stringent thermal and mechanical demands while achieving interoperability in advanced aerospace communication systems. Use this standard to ensure compliance, quality, and long-term reliability in optical connector ferrules designed for operation at elevated temperatures up to 150 °C.