SIST EN 4604-009:2026
(Main)Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard
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
Ta dokument določa zahtevane lastnosti lahkega koaksialnega kabla, 50 Ω, tipa KW, za uporabo v električnih sistemih letal pri obratovalnih temperaturah med −55 °C in 180 °C, posebej za visoke frekvence do 6 GHz. Kljub temu je, če je potrebno, sprejemljiva tudi temperatura −65 °C, kar je dokazano s preskusom hitre spremembe temperature.
General Information
- Status
- Published
- Public Enquiry End Date
- 21-May-2024
- Publication Date
- 07-May-2026
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 04-May-2026
- Due Date
- 09-Jul-2026
- Completion Date
- 08-May-2026
Relations
- Effective Date
- 22-Apr-2026
- Effective Date
- 22-Apr-2026
- 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.
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Frequently Asked Questions
SIST EN 4604-009:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Cable, electrical, for signal transmission - Part 009 : Cable, coaxial, light weight, 50 ohms, 180 °C, type KW (light WN) - Product standard". This standard covers: 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.
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.
SIST EN 4604-009:2026 is classified under the following ICS (International Classification for Standards) categories: 33.120.10 - Coaxial cables. Waveguides; 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 4604-009:2026 has the following relationships with other standards: It is inter standard links to SIST EN 4604-002:2010, SIST EN 4604-001:2019, SIST EN 4604-009:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 4604-009:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2026
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: EN 4604-009:2026
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 4604-009
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 49.060 Supersedes 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 European Standard was approved by CEN on 24 November 2025.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4604-009:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 6
4 Required characteristics . 6
4.1 Material, construction, dimensions and mass . 6
4.1.1 Material . 6
4.1.2 Construction, dimensions and mass . 7
4.2 General characteristics . 7
4.3 Electrical characteristics . 7
4.4 Tests . 10
5 Quality assurance . 15
6 Designation . 16
7 Identification and marking . 16
8 Colours of components and jacket . 16
9 Packaging, labelling and delivery lengths . 16
9.1 Packaging and labelling . 16
9.2 Delivery lengths. 16
10 Technical specification . 16
Bibliography . 17
European foreword
This document (EN 4604-009:2026) 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 shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by October 2026, and conflicting national standards shall be withdrawn
at the latest by October 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 4604-009:2017.
EN 4604-009:2017:
— editorial improvements and update of 4.3 to modify Table 3 and add Figure 2.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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 the
United Kingdom.
1 Scope
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.
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 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection
systems
EN 3475-201, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 201: Visual
examination
EN 3475-202, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 202: Mass
EN 3475-203, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 203: Dimensions
EN 3475-301, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 301: Ohmic
resistance per unit length
EN 3475-302, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 302: Voltage proof
test
EN 3475-303, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 303: Insulation
resistance
EN 3475-306, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 306: Continuity of
conductors
EN 3475-407, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 407: Flammability
EN 3475-411, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 411: Resistance to
fluids
EN 3475-415, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 415: Rapid change
of temperature
EN 3475-416, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 416: Thermal
stability
EN 3475-418, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 418: Thermal
endurance for conductors
EN 3475-502, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 502: Notch
propagation
EN 3475-503, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 503: Scrape
abrasion
EN 3475-505, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 505: Tensile test
on conductors and strands
EN 3475-506, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 506: Plating
continuity
EN 3475-507, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 507: Adherence of
plating
EN 3475-508, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 508: Plating
thickness
EN 3475-512, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 512: Flexure
endurance
EN 3475-513, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 513: Deformation
resistance (installation with plastic cable ties)
EN 3475-514, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 514: Porosity of
copper cladding on aluminium strands
EN 3475-515, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 515: Crush
resistance
EN 3475-601, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 601: Smoke
density
EN 3475-602, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 602: Toxicity
EN 3475-701, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 701: Strippability
and adherence of insulation to the conductor
EN 3475-702, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 702: Screen
pushback capability
EN 3475-703, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 703: Permanence
of manufacturer’s marking
EN 3475-704, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 704: Flexibility
EN 3475-804, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 804: Velocity of
propagation
EN 3475-805, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 805:
Characteristic impedance
EN 3475-806, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 806: Attenuation
EN 3475-807, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 807: Transfer
impedance
EN 3475-812, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 812: Return loss
(VSWR)
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
ASTM B566, Standard Specification for Copper-Clad Aluminium Wire
IEC 60096-0-1, Radio frequency cables — Part 0-1: Guide to the design of detail specifications — Coaxial
cables
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3475-100 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/
4 Required characteristics
4.1 Material, construction, dimensions and mass
4.1.1 Material
Material shall be as described in Table 1.
Table 1 — Material
Material Finish Colour
Single-strand (copper clad aluminium
Conductor 1 µm silver plated —
according to ASTM B566 class 15 A)
Dielectric Fluorocarbon dielectric with low epsilon — —
Screen (foil) Foil, silver plated copper or silver alloy — —
Reinforced braid made of a mix of strands in:
— copper or copper alloy according to
EN 4434;
Shiel
...




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