SIST EN 4644-022:2016

Overview

SIST EN 4644-022:2016 defines the requirements for size 2 plugs within the family of modular, rectangular electrical and optical connectors used in aerospace applications. This product standard specifies plugs with mounting holes suitable for disconnect applications, operating at continuous temperatures of 175 °C or 125 °C. The standard applies to Class A, C, and E connectors and is closely aligned with the corresponding receptacles detailed in EN 4644-024, EN 4644-025, and EN 4644-026. This ensures compatibility and consistent performance in demanding aerospace environments, where reliability and modularity are crucial.

Key Topics

• Connector Features:

  • Size 2 plug configuration for modular connector systems
  • Designed for both electrical and optical connections
  • Rectangular inserts for efficient space use and secure mating

• Mounting and Installation:

  • Includes mounting holes for secure panel installation
  • Supports various thread options for mounting hardware

• Environmental Performance:

  • Rated for continuous operation at up to 175 °C, supporting higher-temperature aerospace environments
  • Maximum mass of 40 grams, contributing to overall system weight optimization

• Classification:

  • Available in Class A, C, and E, enabling appropriate selection according to environmental and performance needs
  • Compliant with modularity and configuration requirements for series-wide interoperability

Applications

The standard's connectors are widely utilized in the aerospace industry, addressing electrical and optical interconnect needs in harsh, high-temperature environments. Typical applications include:

• Avionics Systems: Securely connecting navigation, communication, and control equipment
• Aircraft Wiring Harnesses: Modular connections for ease of installation, maintenance, and future upgrades
• Electrical Distribution: Robust and reliable interconnects for power and signal routing in aircraft interiors and exteriors
• Optical Data Transmission: Supporting data systems requiring high-speed, low-loss optical links
• Military and Defense Equipment: Use in specialized mission-critical applications needing high reliability and environmental resistance

By meeting stringent mechanical, thermal, and electrical requirements, this connector standard helps ensure safety, performance, and maintainability in critical aerospace systems. Modular rectangular connectors defined by this standard are also suitable for use in other sectors requiring comparable performance, such as rail, marine, or industrial automation.

Related Standards

When designing systems compliant with SIST EN 4644-022:2016, it is important to reference related standards for complete integration and system compatibility:

• EN 4644-001: Technical specification for modular rectangular connectors (electrical and optical), including general requirements and definitions.
• EN 4644-002: Specification of performance and contact arrangements for the connector series.
• EN 4644-024: Receptacle (size 2, class A, C, E) product standard, directly mated with the plugs defined in this standard.
• EN 4644-025: Size 2 receptacle with flange, relevant for mounting variations.
• EN 4644-026: Receptacle with ground block (size 2, class B and F), supporting grounding requirements in complex systems.

Compliance with SIST EN 4644-022:2016 and its related standards ensures reliable, standardized interconnections in aerospace and advanced engineered systems. For complete details, always refer to the latest official documentation and referenced normative standards.