SIST EN 4604-009:2026

Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard

This document specifies the required characteristics of a light weight coaxial cable, 50 Ω, type KW for use in aircraft electrical systems at operating temperature between −55 °C and 180 °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 009: Koaxialkabel, Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN Leichtbauweise) - Produktnorm

Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 009 : Câble, coaxial, allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme de produit

Le présent document spécifie les caractéristiques requises d’un câble coaxial semi-rigide allégé, 50 , de type KW, pour utilisation dans les systèmes électriques d’aéronefs à des températures de fonctionnement comprises entre 55 °C et 180 °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 - 009. del: Kabli, koaksialni, lahki, 50 ohmov, 180 °C, tip KW (lahki WN) - Standard za proizvod

General Information

• Status: Not Published
• Public Enquiry End Date: 21-May-2024
• ICS: 33.120.10 - Coaxial cables. Waveguides
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-May-2026
• Due Date: 09-Jul-2026
• Ref Project: EN 4604-009:2026 - Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard

Relations

• Referred By: SIST EN 4604-002:2010 - Aerospace series - Cable, electrical, for signal transmission - Part 002 : General
• Effective Date: 22-Apr-2026
• Referred By: SIST EN 4604-001:2019 - Aerospace series - Cable, electrical, for signal transmission - Part 001: Technical specification
• Effective Date: 22-Apr-2026
• Revises: SIST EN 4604-009:2017 - Aerospace series - Cable, electrical, for signal transmission - Part 009: Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
• Effective Date: 05-Apr-2023

Overview

kSIST FprEN 4604-009:2025 is a key standard from CEN covering lightweight, semi-rigid coaxial cables designed for aerospace applications. Specifically, it defines the characteristics, testing, and quality requirements for 50-ohm, type KW (light WN) coaxial cables intended for signal transmission in aircraft electrical systems. These cables are optimized for operation within a temperature range from −55 °C to 180 °C and are particularly suited for high-frequency applications up to 6 GHz, meeting strict requirements for reliability, weight, and performance in challenging aerospace environments.

Key Topics

• Cable Construction & Materials:

  • Semi-rigid design with lightweight materials
  • Conductor: Silver-plated, copper-clad aluminium
  • Dielectric: Fluorocarbon with low dielectric constant
  • Shields: Silver-plated copper foil and reinforced braid
  • Jacket: Fluorocarbon, typically turquoise in color

• Electrical Characteristics:

  • Characteristic impedance: 50 Ω (±3 Ω at 200 MHz)
  • High-frequency performance up to 6 GHz
  • Capacitance: 88 pF/m maximum
  • Transfer impedance: 20 mΩ/m maximum up to 400 MHz
  • Operating voltage: up to 1,000 V RMS

• Mechanical & Environmental Performance:

  • Temperature operation range: −55 °C to 180 °C (with −65 °C exceptional cases)
  • Minimum bend radius: 80 mm (static), 120 mm (dynamic)
  • Flammability, mechanical strength, and rapid temperature change resistance

• Testing & Quality Assurance:

  • Conformance with EN 3475 test methods for aerospace cables
  • Routine checks include dielectric testing, resistance, capacitance, attenuation, VSWR, mechanical durability, and marking legibility
  • Quality assurance practices referencing EN 4604-001

Applications

kSIST FprEN 4604-009:2025 cables are essential components in aerospace electrical and signal transmission systems, providing lightweight and robust solutions for high-frequency data and signal transfer. Common applications include:

• Aircraft Avionics and Signal Systems: For reliable, low-loss signal transmission in navigation, communication, and control circuits.
• High-Frequency Data Links: Suited for radar, sensor, and other high-bandwidth systems needing cables rated up to 6 GHz.
• Weight-Critical Installations: The lightweight design helps reduce overall aircraft mass, improving efficiency and payload capacity.
• Harsh Environment Deployments: Withstanding wide temperature ranges and environmental extremes, the cable is ideal for mission-critical aerospace applications.

Related Standards

For comprehensive compliance and integration of kSIST FprEN 4604-009:2025 cables in aerospace systems, consider referencing the following related standards:

• EN 3475 Series: General test methods for electrical aircraft cables, underpinning many of the test requirements cited in EN 4604-009.
• EN 4434: Standards for lightweight copper or copper alloy conductors used in electrical aerospace cables.
• EN 4604-001: Technical specification for aerospace signal transmission cables, defining overall requirements and quality assurance.
• EN 3197: Guidelines for the design and installation of aircraft electrical and optical interconnection systems.
• ASTM B566: Standards for copper-clad aluminium wire, relevant for conductor specifications.
• IEC 60096-0-1: International guidelines for radio-frequency coaxial cables.

By following kSIST FprEN 4604-009:2025 and its related standards, aerospace manufacturers and system integrators ensure reliable, safe, and high-performance electrical signal transmission, maximizing system integrity and compliance with current European aerospace requirements.

Keywords: kSIST FprEN 4604-009:2025, aerospace coaxial cable, lightweight cable, 50 ohm, high frequency, signal transmission, CEN standard, aircraft cable, temperature resistant cable, aviation wiring standard, quality assurance, European standard.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4604-009:2024
01-maj-2024
Aeronavtika - Kabli, električni, za prenos signala - 009. del: Kabli, koaksialni, lahki,
50 ohmov, 180 °C, tip KW (lahki WN) - Standard za proizvod
Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial,
light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
Luft- und Raumfahrt - Elektrische Leitungen für Signalübertragungen - Teil 009:
Koaxialkabel, Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN Leichtbauweise) -
Produktnorm
Série aérospatiale - Câbles électriques pour transmission de signaux - Partie 009 :
Câble, coaxial, allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme de produit
Ta slovenski standard je istoveten z: prEN 4604-009
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 4604-009:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4604-009:2024
oSIST prEN 4604-009:2024
DRAFT
EUROPEAN STANDARD
prEN 4604-009
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2024
ICS 49.060 Will supersede EN 4604-009:2017
English Version
Aerospace series - Cable, electrical, for signal transmission
- Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C,
type KW (light WN) - Product standard
Série aérospatiale - Câbles électriques pour Luft- und Raumfahrt - Elektrische Leitungen für
transmission de signaux - Partie 009 : Câble, coaxial, Signalübertragungen - Teil 009: Koaxialkabel,
allégé 50 ohms, 180 °C, type KW (WN allégé) - Norme Leichtbauweise, 50 Ohm, 180 °C, Typ KW (WN
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 4604-009:2024 E
worldwide for CEN national Members.

oSIST prEN 4604-009:2024
prEN 4604-009:2024 (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
4.2 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 . 13
9 Packaging, labelling and delivery lengths . 13
9.1 Packaging and labelling . 13
9.2 Delivery lengths. 13
10 Technical specification . 13
Bibliography . 14

oSIST prEN 4604-009:2024
prEN 4604-009:2024 (E)
European foreword
This document (prEN 4604-009:2024) 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 4604-009:2017.
prEN 4604-009:2024 includes the following significant technical changes with respect to
EN 4604-009:2017:
— EN 4604-009 (P4), 03/2017 — Editorial improvements and update of subclause 4.3 to modify
Table 3 and add Figure 2.
oSIST prEN 4604-009:2024
prEN 4604-009:2024 (E)
1 Scope
This document specifies the required characteristics of a semi-rigid light weight coaxial cable, 50 Ω,
type KW for use in aircraft electrical systems at operating temperature between −55 °C and 180 °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 4434, Aerospace series — Copper or copper alloy lightweight conductors for electrical cables —
Product standard (Normal and tight tolerances)
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
ASTM-B566, Standard specification for copper-clad aluminium wire
IEC 60096-0-1:2012+AMD1:2017 CSV, 3 Radio Frequency Cables — Part 0-1: Guidelines for the Design of
Detailed Specifications — Coaxial Cables
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 the date of publication of this document by ASD-STAN, https://www.asd-
stan.org/.
Published by: ASTM National (US) American Socie
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