EN 3375-005:2007

Overview

EN 3375-005:2007 is a European Standard developed by the Aerospace and Defence Industries Association of Europe (ASD-STAN) under CEN. This standard defines the product requirements for a high immunity electrical cable, specifically designed for digital data transmission in aerospace applications. The cable type is WV, featuring a double braid plus metallic layer shielding with an impedance of 77 Ohms and conductor size 24 (AWG 24). It ensures high-performance, reliability, and electromagnetic compatibility essential for aerospace electrical systems.

This standard complements EN 3375-001 and EN 3375-002, which cover technical specifications and general guidelines for aerospace digital data transmission cables.

Key Topics

• Cable Construction
  The cable features two size 24 AWG conductors insulated with fluorocarbon, surrounded by a silver-plated copper double braid shield and an additional metallic layer for enhanced electromagnetic interference (EMI) immunity. The outer jacket is fluorocarbon-based, promoting durability and resistance in harsh aerospace environments.

• Electrical Characteristics

  • Characteristic impedance: (77 ± 7) Ω at 1 MHz
  • Capacitance: maximum 78 pF/m
  • Attenuation: maximum 3.6 dB/100 m at 1 MHz
  • Maximum voltage rating: 600 V AC
  • Transfer impedance values detailed across frequency ranges for shielding effectiveness.

• Mechanical and Environmental Properties
  The cable supports operating temperatures from -65 °C to 200 °C, with a minimum bend radius of 40 mm. It is UV laser markable to enable traceability and easy identification. The cable’s twisting pitch is controlled to optimize signal integrity.

• Test Requirements
  EN 3375-005 aligns testing with EN 3375-001 and EN 3475-100 series, including electrical, mechanical, thermal, and environmental tests. These tests validate dimensional accuracy, electrical resistance, insulation integrity, abrasion resistance, and chemical resistance to ensure compliance with aerospace operational standards.

• Marking and Identification
  The cable is marked as per EN 3375-002 and TR 6058 requirements, using codes for braid type and jacket color. Components are color-coded for easy installation and maintenance (e.g., white and light blue cores, white jacket).

Applications

• Aerospace Digital Data Systems
  Designed primarily for avionics and aircraft digital communication networks requiring robust electrical cables with excellent immunity to electromagnetic interference.

• High-Immunity Cabling Solutions
  Suitable in environments with high electrical noise and where cable shielding performance is critical, including military and commercial aerospace platforms.

• Harsh Operating Environments
  Can withstand wide temperature ranges, mechanical stress, UV exposure, and fluid resistance, making it ideal for integration into aircraft electrical harnesses exposed to extreme conditions.

• Standard Compliance in Aerospace Manufacturing
  Acts as a standardized component in aerospace cable assemblies, reducing variability and improving reliability in aerospace wiring systems.

Related Standards

• EN 3375-001: Technical specifications for aerospace cables for digital data transmission, providing detailed performance criteria.
• EN 3375-002: General requirements and guidelines for aerospace digital data transmission cables.
• EN 2083: Product standard for copper or copper alloy conductors used in electrical cables.
• EN 3475-100: Test methods for aerospace electrical cables ensuring consistent quality and functionality.
• EN 9133: Quality management system guidelines for aerospace standard part qualification.
• TR 6058: Aerospace cable code identification list aiding standard marking and traceability.

By following the EN 3375-005:2007 standard, aerospace industry stakeholders ensure the use of high-quality, reliable electrical cables optimized for critical digital data transmission tasks. This standard supports compliance, safety, and performance in advanced aerospace electrical systems.