FprEN 4604-009

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
• 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 4604-009:2025 - Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard

Relations

• Revises: EN 4604-008:2009 - Aerospace series - Cable, electrical, for signal transmission - Part 008: Cable, coaxial, 50 ohms, 200°C., Type WD - Product standard
• Effective Date: 05-Apr-2023
• Revises: 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

prEN 4604-009:2024 (draft) is a CEN/ASD‑STAN product standard for a lightweight aerospace coaxial cable: 50 Ω, type KW (light WN). It defines materials, construction, electrical performance and qualification tests for semi‑rigid coaxial cable intended for aircraft electrical systems with an operating temperature range of −55 °C to 180 °C (−65 °C acceptable under rapid temperature‑change test) and guaranteed performance for high‑frequency use up to 6 GHz.

Key topics and requirements

• Construction and materials
  • Single‑strand conductor: copper‑clad aluminium (ASTM‑B566 class 15 A), 1 µm silver plated.
  • Dielectric: fluorocarbon with low dielectric constant.
  • Screen: silver‑plated copper or silver alloy foil; reinforced braid of copper/copper‑alloy and copper‑clad aluminium strands.
  • Jacket: fluorocarbon, turquoise colour.
• Mechanical dimensions and mass
  • Detailed conductor/dielectric/shield diameters and mass per metre are specified (nominal mass ~85–95 g/m).
  • Semi‑rigid minimum bend radius: static 80 mm, dynamic 120 mm (per EN 3197).
• Electrical performance
  • Characteristic impedance: 50 ± 3 Ω (measured at 200 MHz).
  • Capacitance: ≤ 88 pF/m.
  • Transfer impedance (≤ 400 MHz): ≤ 20 mΩ/m.
  • Operating voltage: 1 000 V RMS max.
  • Velocity of propagation: ≥ 243 000 km/s (Vr = 83 ± 2 %).
  • Attenuation and power handling curve specified up to 6 GHz (examples from Table 3: attenuation 3.5 dB/100 m at 50 MHz, 41 dB/100 m at 6 GHz; power handling at 40 °C: 8 000 W at 50 MHz, down to 700 W at 6 GHz).
  • VSWR limits specified across frequency bands.
• Qualification and tests
  • Full test suite referenced to the EN 3475 series (visual, electrical, dielectric, thermal endurance, rapid temperature change, flexure, tensile, plating, smoke/toxicity, etc.).
  • Thermal endurance examples: 10 000 h at 180 °C (or equivalent time/temperature alternatives).
• Delivery and marking
  • Delivery on drums (~175 m); minimum piece 50 m.
  • Identification and marking per EN 4604‑002; quality assurance per EN 4604‑001.

Applications and users

This standard is targeted at:

• Aerospace cable manufacturers and suppliers specifying or producing lightweight 50 Ω coaxial cable for avionics and RF systems.
• Aircraft OEMs, systems engineers and procurement teams defining cable performance for telemetry, navigation, communications and radar harnesses operating up to 6 GHz.
• Test labs and qualification engineers performing acceptance and environmental testing to EN 3475 test methods.
• Maintenance and installation technicians who require specified bend radii, marking and handling instructions.

Related standards

• EN 4604‑001 (technical specification), EN 4604‑002 (general/marking)
• EN 3475 series (cable test methods)
• EN 4434 (lightweight copper conductors)
• EN 3197 (design and installation of aircraft interconnection systems)
• IEC 60096‑0‑1, ASTM‑B566

Keywords: EN 4604‑009, aerospace coaxial cable, 50 ohm coax, lightweight coax, 180 °C rated cable, high frequency up to 6 GHz, CEN, ASD‑STAN.

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
...