SIST EN 4165-012:2008

Overview

SIST EN 4165-012:2008 is a European standard developed by CEN that specifies the requirements for flange mounting receptacles with 2 and 4 modules in the aerospace series of rectangular, modular electrical connectors. Designed for continuous operation at temperatures up to 175 °C, this standard ensures high reliability and durability in harsh aerospace environments. It forms part 012 of the EN 4165 series, complementing EN 4165-002 for matching plugs and EN 4165-018 for protective covers.

This product standard addresses the design, materials, performance characteristics, and marking requirements for flange mounting receptacles in series 3, catering to aerospace electrical systems where connector performance under extreme temperature and environmental conditions is critical.

Key Topics

• Scope and Applicability
  Defines flange mounting receptacles with 2 and 4 modules, series 3, used in modular rectangular connectors for aerospace electrical applications. Intended for continuous use up to 175 °C.

• Connector Classes
  The standard specifies three classes of flange mounting receptacles:

  • Class W: Olive drab cadmium plated aluminum alloy with conducting finish, 500 hours salt mist resistance.
  • Class F: Black nickel plated aluminum alloy, 96 hours salt mist resistance.
  • Class A: Black anodized aluminum alloy, non-conducting finish, 48 hours salt mist resistance.

• Design and Dimensions
  Detailed mechanical outlines for 2 and 4 module flange mounting receptacles including groove positioning, flange form, and dimensional tolerances to facilitate interchangeability and robust mounting.

• Marking Requirements
  Connectors must be marked according to EN 2424 category P unless contractual agreements specify otherwise, ensuring traceability and compliance in aerospace manufacturing and maintenance.

• Designation System
  A structured alphanumeric code defines key attributes such as the standard number, class, receptacle type, series, module count, and keying configuration to identify connectors precisely and avoid application errors.

Applications

The SIST EN 4165-012:2008 standard is essential for aerospace manufacturers, suppliers, and engineers involved in:

• Electrical system design and assembly for aircraft and spacecraft requiring modular, reliable rectangular connectors capable of enduring high temperatures.
• Maintenance, repair, and overhaul (MRO) operations ensuring compliance with standardized connector interfaces and performance criteria.
• Aerospace component manufacturing where environmental resistance-including salt mist and temperature stability-is critical for long-term operational integrity.
• Integration of electrical connectors in avionics, propulsion control systems, and other aerospace electrical architectures demanding high durability and precision fit.

Related Standards

• EN 4165-001: Technical specifications for aerospace series rectangular modular electrical connectors operating at 175 °C continuous service temperature.
• EN 4165-002: Defines the plugs corresponding to the flange mounting receptacles described in EN 4165-012.
• EN 4165-018: Specifies protective covers for 2 and 4 module flange mounting receptacles, enhancing environmental protection.
• EN 4165-020: Provides the coupling system keyway specifications to ensure secure connection and correct engagement of receptacles.
• EN 2424: Aerospace series marking requirements, specifying marking categorization and traceability protocols for aerospace products.

By adhering to SIST EN 4165-012:2008, aerospace stakeholders guarantee high-performance electrical connections that meet rigorous environmental and operational demands, supporting safety, compatibility, and efficiency within aerospace applications.