EN 4644-131:2015

Overview

EN 4644-131:2015 is a European standard developed by CEN that specifies the size 3 plug for rack and panel applications within the aerospace series of modular rectangular connectors. These connectors, used for electrical and optical signals, are designed with rectangular inserts and can operate continuously at high temperatures of 175 °C or 125 °C. The standard ensures interoperability, quality, and reliability for connectors used in aerospace and defense electrical systems.

The corresponding receptacle for this plug is defined in EN 4644-133. Together, these standards form part of a comprehensive framework for modular rectangular connectors suited for harsh environments and demanding aerospace applications.

Key Topics

• Connector Type: Size 3 plug designed specifically for rack and panel applications.
• Modular Design: Part of a family of modular rectangular electrical and optical connectors, enabling flexible configurations.
• Operating Temperature: Continuous operation at high temperatures – 175 °C or 125 °C – suitable for aerospace environments.
• Mechanical Features:
  • Self-locking threads for secure mounting: options include M3 × 0.5 or 4-40 UNC threads.
  • Polarization hardware options to ensure correct mating and prevent misconnection.
• Specifications:
  • Maximum mass of 40 grams for lightweight applications.
  • Dimensions and mechanical details standardized for compatibility.
• Marking and Identification:
  • Housing marked with date of manufacture, manufacturer name or trademark.
  • Clear designation of shell class and housing type for traceability.

Applications

EN 4644-131:2015 connectors are widely employed in the aerospace industry and related military defense systems where electrical and optical signal integrity is critical under extreme conditions. Typical applications include:

• Rack and Panel Installations: Facilitates robust and modular connections on aerospace equipment racks and control panels.
• Electrical and Optical Data Transmission: Ensures reliable signal transmission in avionics, sensors, and communication systems.
• High-Temperature Environments: Suitable for use in engine compartments or other locations within aerospace vehicles where elevated temperature operation is required.
• Interoperability in Aerospace Systems: Enables standardized plug and receptacle interfaces, reducing customization and allowing easier maintenance and replacement.

These connectors support critical aerospace missions by delivering reliable connectivity, ease of integration, and compliance with stringent aerospace quality standards.

Related Standards

This standard is closely linked to several other documents within the EN 4644 series that collectively govern aerospace modular rectangular connectors:

• EN 4644-001: Technical specifications applicable to the connector family, providing foundational terminology and general requirements.
• EN 4644-002: Specifies performance criteria and contact arrangements for electrical and optical connectors in this series.
• EN 4644-133: Defines the size 3 receptacle intended to complement the size 3 plug outlined in EN 4644-131 for rack and panel applications.

Together, these standards ensure a consistent approach to the design, performance, testing, and marking of aerospace electrical and optical connectors.

Keywords: EN 4644-131:2015, aerospace connector standard, modular rectangular connector, size 3 plug, electrical and optical connector, rack and panel applications, high-temperature connector, self-locking thread, aerospace electrical systems, CEN standards.