SIST EN 4604-010:2026

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

Ta dokument določa zahtevane značilnosti lahkega koaksialnega kabla, 50 Ω, tip KX, za uporabo v električnih sistemih letal pri obratovalnih temperaturah med −55 °C in 200 °C, posebej pa za visoke frekvence do 6 GHz. Kljub temu je, če je potrebno, sprejemljiva tudi temperatura −65 °C, kar je prikazano s preskusom hitre spremembe temperature.

General Information

• Status: Published
• Public Enquiry End Date: 28-May-2024
• Publication Date: 06-May-2026
• 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
• Completion Date: 07-May-2026
• Ref Project: EN 4604-010:2026 - Aerospace series - Cable, electrical, for signal transmission - Part 010: Cable, coaxial, light weight, 50 ohms, 200 °C, type KX (light WD) - 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
• Revises: SIST 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

SIST EN 4604-010:2026 is a European product standard developed by SIST, focusing on aerospace electrical cables specifically designed for signal transmission. This part of the standard details the requirements for a lightweight coaxial cable, 50 ohms, type KX (light WD), with exceptional thermal and electrical performance for use in aircraft electric systems. The cables addressed by this standard are intended for operations across a wide temperature range from −55 °C to 200 °C and for signal transmission at high frequencies up to 6 GHz. The standard is essential for designing reliable and efficient cable systems in demanding aerospace applications.

Key Topics

• Cable Construction & Materials
  The standard specifies cable construction involving a silver-plated copper conductor, fluorocarbon dielectric and jacket, and additional shielding consisting of tapes and braids. Lightweight design is emphasized for aircraft applications.

• Performance Characteristics

  • Impedance: 50 Ω ±2 Ω at 200 MHz
  • Maximum attenuation and defined power handling over frequency bands up to 6 GHz
  • Operating voltage up to 1,000 V RMS
  • VSWR and transfer impedance requirements support high-frequency transmission integrity
  • Designed minimum bend radius ensures installation flexibility per EN 3197

• Environmental & Mechanical Endurance
  The cable is tested for performance under rapid temperature changes, with endurance from −55 °C up to 200 °C, and acceptability demonstrated down to −65 °C.
  It is also subject to tests for flammability, resistance to fluids, abrasion, crush resistance, flexure, and other critical mechanical stresses common in aerospace settings.

• Testing and Quality Assurance
  Extensive qualification and acceptance testing are specified, referencing the EN 3475 series for:

  • Visual and dimensional examinations
  • Electrical inspections (e.g., ohmic resistance, insulation resistance, voltage proof)
  • Environmental tests (e.g., thermal stability, rapid temperature cycle)
  • Durability (e.g., abrasion, tensile strength, flexure endurance) Quality assurance provisions rely on EN 4604-001 and EN 4604-002 for consistent identification, marking, packaging, and delivery.

Applications

SIST EN 4604-010:2026 is directly applicable to:

• Aircraft Electrical Systems
  Ensures reliable high-frequency signal transmission in avionic equipment, communication systems, navigation, and control units.
• Aerospace Platform Integration
  Suitable for both military and commercial aircraft, this cable type meets the strict weight, performance, and safety demands of aerospace platforms.
• Harsh Environments
  With robust resistance to extreme temperatures, chemical exposure, and physical stress, this cable is ideal for use where long service life and reliability are critical.

Utilizing cables compliant with this standard supports system safety, electromagnetic compatibility, and efficient transmission performance, helping organizations achieve certification and regulatory compliance for aerospace products.

Related Standards

The following standards are closely associated with SIST EN 4604-010:2026 and should be consulted for comprehensive system integration and testing:

• 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
• EN 3475 Series: Various parts covering test methods for visual inspection, dimensions, resistance, voltage, fluids, flammability, flexure, attenuation, transfer impedance, etc.
• IEC 60096-0-1: Guide to the design of detail specifications – Coaxial cables
• ASTM B298: Silver-coated soft or annealed copper wire specifications

Keywords

aerospace cables, lightweight coaxial cable, 50 ohm cable, high-frequency signal transmission, aircraft electrical systems, temperature resistant cable, EN 4604-010, SIST standards, aviation cable standards

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Adopting SIST EN 4604-010:2026 ensures compliance with international aerospace cable standards, supporting the reliability and performance necessary in modern aircraft and aerospace systems.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2026
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: EN 4604-010:2026
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 4604-010
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 49.060 Supersedes 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 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 4604-010:2026 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, constructions, 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 4604-010:2026) 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 4604-010:2018.
EN 4604-010:2018:
 editorial improvements and update of 4.3 to modify Table 3 and add Figure 2 and Figure 3.
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 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 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 3475-307, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 307: Corona
extinction voltage
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 3475-502, 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 3475-515, 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 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 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
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, constructions, dimensions and mass
4.1.1 Material
Material shall be as described in Table 1.
Table 1 — Material
Material Finish Colour
Single-strands copper in accordance with
Conductor 1 µm silver plated —
ASTM B298-07
Dielectric Fluorocarbon — —
Screen (foil) Tape, silver plated copper or silver alloy — —
Braid, copper in accordance with
Shield 1 µm silver plated —
ASTM B298-12
Jacket Fluorocarbon — Light green

Published by: ASTM International (US), available at: https:
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