SIST EN 4644-012:2016

Overview

SIST EN 4644-012:2016 is a European Standard developed by CEN that defines the specifications for a size 1 receptacle used in aerospace electrical and optical connectors. This standard covers modular, rectangular connectors with rectangular inserts designed for continuous operation at temperatures of 175 °C (or 125 °C). The receptacle specified in this document is primarily intended for disconnect applications within aerospace systems. It is part of the EN 4644 series, which standardizes high-performance connectors for electrical and optical signal transmission in demanding aerospace environments.

The corresponding plug for this receptacle is referenced in standards EN 4644-011 and EN 4644-013, ensuring compatibility within connector families. The standard supports the aerospace industry's requirements for reliability, interchangeability, and thermal endurance.

Key Topics

• Connector Type: Modular rectangular connectors with rectangular inserts suitable for both electrical and optical applications.
• Operating Temperature: Designed for continuous use at elevated temperatures of up to 175 °C or alternatively 125 °C.
• Size and Class: Defines size 1 receptacles across classes A, C, and E, which categorize connector shell design and performance attributes.
• Mechanical Characteristics:
  • Dimensions and panel cut-outs specified for uniform mounting
  • Use of self-locking UNC threads (4-40 and 6-32) for secure attachments and accessory fixing
• Mass: Maximum receptacle weight of 50 grams to meet aerospace weight constraints.
• Compliance References: Must be used in conjunction with related parts of the EN 4644 series such as:
  • EN 4644-001 (Technical specifications)
  • EN 4644-002 (Performance and contact arrangements)
  • EN 4644-011 and EN 4644-013 (Corresponding plug standards)

Applications

• Aerospace Systems: Ideal for harsh aerospace electrical and optical interconnect requirements requiring robust modular connectors capable of withstanding extreme temperature environments.
• Disconnect Solutions: Specifically designed as receptacle connectors that allow reliable connection and disconnection in critical aerospace equipment and instrumentation.
• High-Temperature Environments: Suitable for avionics, navigation, and communication equipment operating under continuous high temperatures.
• Compact and Lightweight Designs: With low mass and small form-factor size 1 receptacles, it supports weight and space constraints typical in aircraft and spacecraft.

Related Standards

• EN 4644-001: Technical Specification for aerospace series modular connectors - defines general terms, basic design, and environmental requirements.
• EN 4644-002: Specification of performance criteria and contact arrangements for the connector family.
• EN 4644-011: Defines size 1 plug connectors compatible with the receptacles specified in EN 4644-012.
• EN 4644-013: Specifies size 1 plug connectors with ground block options, compatible with corresponding receptacles.
• ASD-STAN Standards: These standards are part of the Aerospace and Defence Industries Association of Europe’s (ASD-STAN) harmonized connectors series, facilitating cross-border aerospace standardization.

Keywords: EN 4644-012, aerospace connectors, electrical and optical connectors, modular rectangular connectors, size 1 receptacle, high-temperature connectors, aerospace disconnect connectors, EN 4644 series, CEN aerospace standards, aerospace connector specifications.