SIST EN 4639-005:2009

Overview

EN 4639-005:2007 is a CEN product standard in the aerospace series that defines the removable alignment sleeve holder for female optical modules used in rectangular, modular, multicontact optical connectors with a 1.25 mm ferrule. The document sets out required characteristics, designation and marking rules, and refers to related product and technical specifications for materials, surface treatments and performance. It is intended for aerospace electrical and optical systems where reliable optical alignment and modularity are required.

Key topics and requirements

• Scope: Specifies characteristics of the removable alignment sleeve holder for a female optical module in rectangular modular multipin connectors (1.25 mm ferrule).
• Dimensions: Dimensional requirements and cavity layout are given (see Figure 1 of EN 4639-005). The removable sleeve holder must meet defined geometric tolerances for correct fit and floating movement.
• Assembly: The sleeve holder must be assembled into the female insert as specified in EN 4639-004.
• Materials & surface treatment: Material selection and surface treatment requirements reference EN 4644-001.
• Optical, mechanical & climatic characteristics: Performance requirements are specified by reference to EN 4639-002 and the relevant optical contact product standards - performance is dependent on optical contact and fibre technology.
• Designation & marking: Product designation format is provided (example: EN4639-005 + arrangement/material codes). Marking must include identification, manufacture date (year, week) and manufacturer name or trademark, or comply with EN 2424 (code P) where required.
• Conformance: Applies within the ASD-STAN/CEN framework; national adoption and withdrawal of conflicting standards were mandated following publication.

Practical applications and users

• Where used: Aerospace and defence optical interconnect systems in aircraft, satellites and other platforms that require modular multicontact optical connectors with precise ferrule alignment.
• Who uses it:
  • Connector designers and manufacturers specifying removable alignment sleeve holders.
  • System integrators and OEMs selecting modular optical connector components for avionics and space applications.
  • Procurement, quality and certification teams ensuring supplier compliance and traceability.
  • Test laboratories evaluating mechanical, optical and climatic performance per referenced standards.
• Value: Ensures interchangeability, reliable optical alignment, reproducible performance and standardized marking for lifecycle traceability in critical aerospace installations.

Related standards

• EN 4639-001 - Technical specification (general terms and definitions)
• EN 4639-002 - List of product standards; optical/mechanical/climatic characteristics
• EN 4639-004 - Female optical module - Product standard (assembly interface)
• EN 4644-001 - Material and surface treatment guidance
• EN 2424 - Marking of aerospace products

Keywords: EN 4639-005:2007, removable alignment sleeve holder, aerospace optical connectors, rectangular modular multicontact, 1.25 mm ferrule, connector standard.