SIST EN 3375-005:2009

Overview

SIST EN 3375-005:2009 is a European Standard developed by CEN within the Aerospace series. It specifies the characteristics and requirements for high immunity electrical cables with double braid and metallic layer shielding, designed specifically for digital data transmission in aerospace applications. The standard focuses on 77 Ohm, size 24, Type WV cables that ensure optimal electrical performance and electromagnetic interference (EMI) protection for mission-critical aerospace systems. This product standard complements EN 3375-001 and EN 3375-002 and should be used in conjunction with them for comprehensive cable qualification and application.

Key Topics

• High Immunity Shielding: Features a double braid plus metallic layer, offering superior protection against EMI, which is crucial for reliable digital signal integrity in high-noise aerospace environments.

• Specified Electrical Performance:

  • Nominal impedance: 77 Ohms ±7 at 1 MHz
  • Capacitance: up to 78 pF/m
  • Attenuation: maximum 3.6 dB/100 m at 1 MHz
  • Maximum voltage rating: 600 V AC (for information)
  • Transfer impedance: specified at several frequencies for robust performance

• Material and Physical Properties:

  • Conductors: Size 24, copper or copper alloy
  • Insulation: Fluorocarbon
  • Jacket: White fluorocarbon, with marking color codes for identification
  • Operating temperature: -65°C to +200°C
  • Bend radius: minimum 40 mm
  • UV laser markable for traceability

• Testing & Assurance: Comprehensive test regimes are detailed, including visual examination, electrical tests, mechanical tests, environmental resistance, solderability, and fire and smoke assessments. Quality assurance is based on EN 9133.

Applications

SIST EN 3375-005:2009 cables are engineered for use in aerospace electrical systems where digital data transmission is critical. Their robust shielding and stable electrical performance make them ideal for:

• Aircraft avionics and control systems: Ensuring reliable communication and data integrity between electronic components and sensors
• Mission-critical data networks: Protecting high-frequency digital signals from EMI in the demanding environment of aircraft and spacecraft
• Aerospace data buses: Enabling synchronous and asynchronous data transmission for flight control, navigation, and monitoring systems
• High-reliability harnesses: Used in cable assemblies where stringent marking, traceability, and quality requirements are mandated

These cables are typically specified by OEMs and aerospace system integrators where conformance to European and international standards is essential for airworthiness and equipment interoperability.

Related Standards

For full compliance and effective use, SIST EN 3375-005:2009 should be read in conjunction with the following standards:

• EN 3375-001: Technical specification for electrical cables for digital data transmission in aerospace
• EN 3375-002: General requirements for these types of cables
• EN 2083: Specifications for copper or copper alloy conductors used in aerospace cables
• EN 9133: Aerospace quality management systems - qualification procedure for standard parts
• EN 3475-100: Test methods for electrical cables used in aircraft

By adhering to SIST EN 3375-005:2009 and related standards, manufacturers and users ensure consistent performance, safety, and reliability of data transmission cables in aerospace applications.

Keywords: EN 3375-005, aerospace cable, digital data transmission, double braid shield, 77 Ohm cable, EMI protection, Type WV, CEN standard, aerospace electrical cable, aviation data cable standard.