FprEN 4604-010

Aerospace series - Cable, electrical, for signal transmission - Part 010: Cable, coaxial, light weight, 50 ohms, 200 °C, type KX (light WD) - Product standard

This document specifies the required characteristics of a light weight coaxial cable, 50 Ω, type KX for use in aircraft electrical systems at operating temperature between −55 °C and 200 °C and specially for high frequency up to 6 GHz. Nevertheless, if needed, −65 °C is also acceptable as shown by rapid change of temperature test.

Luft- und Raumfahrt - Elektrische Leitungen für Signalübertragungen - Teil 010: Koaxialkabel, Leichtbauweise, 50 Ohm, 200 °C, Typ KX (WD Leichtbauweise) - Produktnorm

Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 010 : Câble, coaxial, allégé, 50 ohms, 200 °C, type KX (WD allégé) - Norme de produit

Le présent document spécifie les caractéristiques requises d’un câble coaxial semi-rigide allégé, 50 , de type KX, pour utilisation dans les systèmes électriques d’aéronefs à des températures de fonctionnement comprises entre 55 °C et 200 °C, et notamment à haute fréquence jusqu’à 6 GHz. Néanmoins, si nécessaire, 65 °C est également acceptable comme indiqué par l’essai de variation rapide de température.

Aeronavtika - Kabli, električni, za prenos signala - 010. del: Kabli, koaksialni, lahki, 50 ohmov, 200 °C, tip KX (lahki WD) - Standard za proizvod

General Information

• Status: Not Published
• Publication Date: 25-Jan-2026
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2/S 2 - Cables & Stripping Tools
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 24-Nov-2025
• Completion Date: 24-Nov-2025
• Ref Project: kSIST FprEN 4604-010:2025 - Aerospace series - Cable, electrical, for signal transmission - Part 010 : Cable, coaxial, light weight, 50 ohms, 200 °C, type KX (light WD) - Product standard

Relations

• Revises: EN 4604-010:2018 - Aerospace series - Cable, electrical, for signal transmission - Part 010 : Cable, coaxial, light weight, 50 Ohms, 200 °C, type KX (light WD) - Product standard
• Effective Date: 05-Apr-2023

Overview

FprEN 4604-010 is a European aerospace standard developed by CEN and ASD-STAN, focusing on high-performance electrical cables for signal transmission in aircraft. This standard specifies the characteristics and requirements for a light weight, semi-rigid coaxial cable-type KX-with a characteristic impedance of 50 ohms, designed to operate reliably in harsh environments ranging from −55 °C up to 200 °C. The cable is optimized for high-frequency applications up to 6 GHz, with provisions allowing operation down to −65 °C verified through rapid temperature change testing. As a key product standard in aerospace electrical systems, it ensures durability, electrical performance, and safety in mission-critical applications.

Key Topics

• Material and Construction
  The cable comprises single-strand copper conductors with a 1 µm silver plating, fluorocarbon dielectric and jacket materials, along with silver-plated copper or silver alloy shielding tapes and braids. The outer jacket is specified in translucent light green for visibility and identification.

• Electrical Characteristics

  • Nominal characteristic impedance: 50 ± 2 Ω at 200 MHz
  • Capacitance: maximum 88 pF/m
  • Maximum operating voltage: 1000 V RMS
  • Frequency range: DC up to 6 GHz
  • Velocity of propagation: minimum 225,000 km/s (approx. 83% of light speed)
  • Attenuation and power handling capacities are defined and tested under rigorous conditions for stable high-frequency transmission.

• Mechanical Properties
  The standard defines cable diameter tolerances, mass per meter, and bending radius requirements (minimum 30 mm static, 50 mm dynamic). This guarantees structural integrity under mechanical stress typical in aerospace environments.

• Testing and Quality Assurance
  Extensive mechanical, electrical, thermal, and environmental tests apply, including:

  • Ohmic resistance and insulation resistance tests
  • Voltage proof and corona extinction voltage tests
  • Thermal stability and rapid temperature change assessments
  • Flame resistance and smoke toxicity evaluations
  • Abrasion, crush resistance, and flexure endurance tests to ensure long-term reliability

• Identification and Marking
  Markings comply with aerospace identification standards, maintaining legibility under harsh conditions. Colours and labels are standardized for consistency.

Applications

The FprEN 4604-010 standard is critical for aerospace manufacturers and electrical system designers requiring lightweight, high-performance coaxial cables that can withstand extreme temperature ranges and high frequency signal transmission. Applications include:

• Avionic signal transmission lines
• High-frequency RF interconnects within aircraft
• Electrical systems requiring lightweight cabling solutions with rigorous environmental resistance
• Aerospace projects demanding compliance with harmonized European aerospace cable standards

This cable type’s ability to perform reliably in wide temperature ranges and high frequency makes it essential in modern aircraft designs and ensures compatibility with advanced avionics and communication systems.

Related Standards

• EN 4604-001 & EN 4604-002 - General technical specifications and marking requirements for aerospace electrical cables
• EN 3475 Series - Aerospace electrical cable test methods ensuring reliability and safety
• EN 3197 - Design and installation of aircraft electrical and optical interconnection systems
• IEC 60096-0-1 - Guidelines on radio frequency coaxial cable specifications
• ASTM B298-07 / B298-12 - Specifications for silver-coated copper wire used in aerospace cables
• EN 4434 - Aerospace standard for lightweight copper conductors used in cable manufacturing

Adherence to FprEN 4604-010 and related standards ensures that aerospace cables meet critical performance, safety, and quality demands, forming an integrated framework for reliable electrical interconnections in aviation.

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Keywords: aerospace cable standard, coaxial cable type KX, 50 ohms, high frequency cable, lightweight aerospace cable, aircraft electrical system, cable thermal resistance, cable testing aerospace, aviation signal transmission cable, aerospace wiring standards.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4604-010:2024
01-maj-2024
Aeronavtika - Kabli, električni, za prenos signala - 010. del: Kabli, koaksialni, lahki,
50 ohmov, 200 °C, tip KX (lahki WD) - Standard za proizvod
Aerospace series - Cable, electrical, for signal transmission - Part 010 : Cable, coaxial,
light weight, 50 ohms, 200 °C, type KX (light WD) - Product standard
Luft- und Raumfahrt - Elektrische Leitungen für Signalübertragungen - Teil 010:
Koaxialkabel, Leichtbauweise, 50 Ohm, 200 °C, Typ KX (WD Leichtbauweise) -
Produktnorm
Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 010 :
Câble, coaxial, allégé, 50 ohms, 200 °C, type KX (WD allégé) - Norme de produit
Ta slovenski standard je istoveten z: prEN 4604-010
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
oSIST prEN 4604-010:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4604-010:2024
oSIST prEN 4604-010:2024
DRAFT
EUROPEAN STANDARD
prEN 4604-010
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS 49.060 Will supersede EN 4604-010:2018
English Version
Aerospace series - Cable, electrical, for signal transmission
- Part 010 : Cable, coaxial, light weight, 50 ohms, 200 °C,
type KX (light WD) - Product standard
Série aérospatiale - Câbles électriques pour Luft- und Raumfahrt - Elektrische Leitungen für
transmission de signaux - Partie 010 : Câble, coaxial, Signalübertragungen - Teil 010: Koaxialkabel,
allégé, 50 ohms, 200 °C, type KX (WD allégé) - Norme Leichtbauweise, 50 Ohm, 200 °C, Typ KX (WD
de produit Leichtbauweise) - Produktnorm
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4604-010:2024 E
worldwide for CEN national Members.

oSIST prEN 4604-010:2024
prEN 4604-010:2024 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
4.1 Material, constructions, dimensions and mass . 5
4.1.1 Material . 5
4.1.2 Construction, dimensions and mass . 5
4.2 General characteristics . 6
4.3 Electrical characteristics . 6
4.4 Tests . 8
5 Quality assurance . 12
6 Designation . 12
7 Identification and marking . 12
8 Colours of components and jacket . 12
9 Packaging, labelling and delivery lengths . 12
9.1 Packaging and labelling . 12
9.2 Delivery lengths. 13
10 Technical specification . 13
Bibliography . 14

oSIST prEN 4604-010:2024
prEN 4604-010:2024 (E)
European foreword
This document (prEN 4604-010:2024) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 4604-009:2018.
prEN 4604-010:2024 includes the following significant technical changes with respect to
EN 4604-009:2018:
— EN 4604-010 (P4), 08/2018 — Editorial improvements and update of subclause 4.3 to modify
Table 3 and add Figure 2.
oSIST prEN 4604-010:2024
prEN 4604-010:2024 (E)
1 Scope
This document specifies the required characteristics of a semi-rigid light weight coaxial cable, 50 Ω,
type KX for use in aircraft electrical systems at operating temperature between −55 °C and 200 °C and
specially for high frequency up to 6 GHz. Nevertheless, if needed, −65 °C is also acceptable as shown by
rapid change of temperature test.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3475 (all parts), Aerospace series — Cables, electrical, aircraft use — Test methods
EN 4604-001, Aerospace series — Cable, electrical, for signal transmission — Part 001: Technical
specification
EN 4604-002, Aerospace series — Cable, electrical, for signal transmission — Part 002 : General
EN 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection
systems
IEC 60096-0-1:2012+AMD1:2017, CSV, Radio frequency cables — Part 0-1: Guidelines to the design of
detail specifications — Coaxial cables
ASTM-B298-07, Standard specification for silver-coated soft or annealed copper wire
ASTM-B298-12, Standard specification for silver-coated soft or annealed copper wire
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3475-100 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
epsilon
(ε)
value of dielectric constant
Note 1 to entry: Refer to EN 4604-001.

Published as ASD-STAN Standard at th
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