SIST EN 4644-024:2016

Overview

SIST EN 4644-024:2016 is a European standard from the Aerospace series that defines requirements for size 2 receptacles used in modular, rectangular electrical and optical connectors with rectangular inserts. These connectors are designed for continuous operation at temperatures up to 175 °C (or 125 °C), making them suitable for the demanding environments of the aerospace industry. This standard provides guidance for receptacles in classes A, C, and E, and is intended specifically for disconnect applications. It ensures interoperability and performance consistency across aerospace electrical and optical connector systems.

Key Topics

• Receptacle Specifications: Focuses on the design and characteristics of size 2 receptacles intended for modular, rectangular connector systems.
• Temperature Performance: Defines operating temperature requirements of 175 °C (or 125 °C) continuous, ensuring suitability for aerospace conditions.
• Standardized Insert Types: Covers connectors with rectangular inserts, facilitating modularity and customization in aerospace equipment.
• Compatibility: Specifies the compatible plugs through references to EN 4644-021, EN 4644-022, and EN 4644-023, supporting flexible integration.
• Mechanical Features: Includes recommended panel cut-out dimensions, hole types (clear or threaded), and maximum mass requirements to support standardized assembly and installation.
• Product Classes: Applies to classes A, C, and E, allowing users to select receptacles according to specific environmental and mechanical demands.

Applications

The SIST EN 4644-024:2016 standard is essential for organizations and engineers involved in the design, specification, and maintenance of aerospace systems requiring robust, modular electrical and optical connectivity. Key applications include:

• Aircraft Electrical Systems: Used in onboard wiring solutions, avionics, power distribution, and data transmission, ensuring reliable connections under extreme operating temperatures.
• Aerospace Equipment Manufacturing: Facilitates consistent integration of modular connectors in various aerospace equipment, from commercial airliners to military and unmanned aerial vehicles.
• Maintenance and Upgrades: Supports replacement and upgrading of connector systems in aircraft, thanks to standardized dimensions and interoperability with companion plug standards.
• Critical Signal and Power Links: Essential for applications where secure, high-quality signal or power transfer is needed, such as flight control systems or instrumentation panels.

By adhering to the standard, manufacturers and operators achieve improved systems reliability, simplified logistical support, and compliance with European aerospace connector requirements.

Related Standards

Adoption and use of SIST EN 4644-024:2016 often involve referencing additional related standards that cover different connector components, performance criteria, and assemblies:

• EN 4644-001 – General technical specification for the aerospace modular connectors family.
• EN 4644-002 – Performance specifications and contact arrangements for modular aerospace connectors.
• EN 4644-021 – Defines plug, size 2, without mounting holes, class A, C, and E.
• EN 4644-022 – Defines plug, size 2, with mounting holes, class A, C, and E.
• EN 4644-023 – Defines plug, size 2, with ground block, class B and F.

These standards together form a cohesive basis for the design, manufacture, and management of rectangular modular connectors in the aerospace sector, further supporting the reliability and efficiency of electrical and optical systems in aviation applications.