SIST EN 3155-074:2009

Overview

SIST EN 3155-074:2009 is a European standard published by CEN that defines the product specifications for male electrical quadrax contacts used in aerospace connector systems. These contacts are shielded, size 8, type E, crimp style, and classified under class R, which supports an operating temperature range from -65 °C to 150 °C. This standard complements EN 3155-001 and EN 3155-002 and pairs with the female counterpart defined in EN 3155-075.

Developed by the Aerospace and Defence Industries Association of Europe (ASD-STAN), SIST EN 3155-074:2009 ensures that quadrax contacts meet critical performance, quality, and reliability requirements essential for aerospace electrical connections.

Key Topics

• Product Characteristics: Defines dimensions, materials, and electrical properties for male quadrax contacts with screening features suitable for high-frequency aerospace applications.
• Materials and Coating: Uses copper alloy bodies with gold plating over an undercoat and PTFE dielectric insulation to ensure durability and superior electrical contact.
• Dimensional Specifications: Precise component measurements and tolerances in millimeters are specified to guarantee interchangeability and performance.
• Crimping and Wiring Instructions: Detailed procedures for cable preparation, crimping sequence, and assembly to ensure robust and consistent connections.
• Tooling Requirements: Specifies crimping and extraction tools necessary for installation and maintenance, improving repeatability and reliability of connections.
• Testing Protocols: Comprehensive testing requirements include electrical resistance, insulation, voltage withstand, mechanical endurance, shock and vibration resistance, fluid resistance, and temperature cycling to validate contact performance.
• Marking and Identification: Standardizes contact designation and labeling for traceability and compatibility verification.

Applications

SIST EN 3155-074:2009 applies primarily to the aerospace industry where high-reliability electrical connections are critical. Typical applications include:

• Avionics equipment interconnections requiring quadrax contacts for improved signal integrity and electromagnetic compatibility.
• Aerospace control systems using shielded multi-conductor cables to reduce interference.
• Harsh environment aerospace systems where contacts must maintain performance in wide temperature ranges and withstand mechanical and environmental stresses.
• Assemblies where reliable, reproducible crimp connections contribute to aircraft safety and operational readiness.

Related Standards

• EN 3155-001: Technical specifications for electrical contacts used in connection elements.
• EN 3155-002: List and utilization guide for electrical contacts in aerospace connectors.
• EN 3155-075: Defines the female counterpart quadrax contacts compatible with EN 3155-074 male contacts.
• EN 2591-100: Aerospace test methods used to verify electrical and mechanical properties.
• EN 3909: Specifies test fluids and methods for assessing electric component resistance to various aerospace fluids.
• EN 4530-002: Details sealing sleeves used in electrical connectors for aerospace applications.
• TR 6058: Aerospace cable code identification list for compatible cables.

Keywords: EN 3155-074, aerospace electrical contacts, quadrax contacts, male electrical contacts, crimp contacts, aerospace connector standards, shielded quadrax, electrical connection elements, aerospace cable assembly, ASD-STAN standards, crimp tooling aerospace, aerospace connector testing, electrical contact specifications.

This standard is essential for aerospace engineers, quality assurance teams, and manufacturers designing or validating quadrax electrical contacts to ensure compliance with European aerospace industry requirements.