prEN 2593-001

• Abstract:

  The present document specifies the characteristics, installation and mounting dimensions for plug-in relay bases for use with two and four poles double throw relays in accordance with EN 2548-001.; Relay bases in accordance with this document shall be used at ambient temperatures between −70 °C and 125 °C and at altitudes up to 25 000 m.

• Status: Not Published
• Publication Date: 21-Feb-2028
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2/WG 4 - Relays, Switches, Push-Buttons
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 27-Aug-2026
• Completion Date: 27-Aug-2026
• Ref Project: oSIST prEN 2593-001:2026 - Aerospace series - Bases for 10 A electromagnetic plug-in relays, two and four poles double thrown - Part 001: Technical specification

• Revises: EN 2593-001:2014 - Aerospace series - Bases for 10 A electromagnetic plug-in relays, two and four poles double thrown - Part 001: Technical specification
• Effective Date: 12-Mar-2025

Overview

prEN 2593-001:2026 establishes the technical specifications for bases used with 10 A electromagnetic plug-in relays featuring two and four poles double thrown, in aerospace applications. Developed by the European Committee for Standardization (CEN), this draft European Standard defines the essential characteristics, installation guidelines, and mounting dimensions necessary to ensure reliable interoperability and high performance of relay bases within demanding environments, such as aircraft and aerospace systems. The standard applies to relay bases compatible with EN 2548-001 relays and is suitable for operation at ambient temperatures from −70 °C to 125 °C, and at altitudes up to 25,000 meters.

Key Topics

• Scope and Compatibility:

  • Specifies requirements for bases used with two and four pole double throw electromagnetic relays, per EN 2548-001.
  • Applicable for relay bases intended for use in extreme aerospace environments.

• Design Features:

  • Relay bases must ensure permanent retention of crimp contacts and cannot separate during normal operation.
  • Includes polarizing holes to guarantee correct relay installation and prevent misapplication.
  • Sealed interfaces using silicon rubber provide environmental and electrical insulation.
  • All hardware uses non-magnetic, corrosion-resistant steel.

• Qualification and Quality Assurance:

  • Relay bases are subject to rigorous testing for mechanical, electrical, and environmental characteristics, as outlined in EN 2349-100.
  • Quality assurance procedures include initial type qualification, periodic verification every three years, and consistent product batch inspection.
  • Marking requirements ensure traceability, including EN reference, date of manufacture, and manufacturer identification.

• Materials and Construction:

  • Relay bases use non-flammable thermoplastics and silicone rubber, per EN 2349-100.
  • Electrical crimp contacts are in accordance with EN 3155-017, suitable for various cable types.

Applications

The prEN 2593-001 standard is vital in the aerospace electrical equipment and systems sector, ensuring robust and dependable connections for relay-based control circuits used in aircraft, satellites, and related platforms. Practical application areas include:

• Aircraft power management: Reliable relay bases enable control and switching of critical on-board systems operating at 10 A.
• Satellite and spacecraft systems: The high altitude and temperature capabilities address the unique challenges of space operations.
• Avionics modules: Standardized relay bases simplify maintenance, reduce potential for mismatching, and streamline system integration throughout the service life of aerospace equipment.

By enforcing these standardized requirements, the document supports the safety, interoperability, and maintainability of aerospace power distribution and switching assemblies.

Related Standards

• EN 2548-001: Aerospace series - Relays, electromagnetic, 10 A, plug-in type, two and four poles double throw - Technical specification.
• EN 2349 (all parts): Aerospace series - Requirements and test procedures for switching devices.
• EN 2593-003, EN 2593-004, EN 2593-005: Product standards for relay bases with various fixation studs and configurations.
• EN 3155-017: Aerospace series - Electrical contacts for relay bases - Product standard.

Professionals in the aerospace sector utilize prEN 2593-001 alongside these related standards to ensure full compliance with regulatory and technical requirements for electrical components and systems used in high-risk, high-reliability applications.

Keywords: aerospace relay bases, electromagnetic relays, plug-in bases, EN 2548-001, electrical equipment, quality assurance, CEN, standardized dimensions, environmental sealing, aircraft electrical systems.

SLOVENSKI STANDARD
01-november-2026
Aeronavtika - Vtičnice za elektromagnetne vtične dvopolne in štiripolne releje za
10 A - 001. del: Tehnične specifikacije
Aerospace series - Bases for 10 A electromagnetic plug-in relays, two and four poles
double thrown - Part 001: Technical specification
Luft- und Raumfahrt - Fassungen für steckbare, elektromagnetische Relais, 10 A, zwei-
und vierpolige Wechselschalter - Teil 001: Technische Lieferbedingungen
S�rie a�rospatiale - Socles pour relais �lectromagn�tiques 10 A, embrochables, deux et
quatre p�les inverseurs - Partie 001: Sp�cification technique
Ta slovenski standard je istoveten z: prEN 2593-001
ICS:
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2026
ICS 49.060 Will supersede EN 2593-001:2014
English Version
Aerospace series - Bases for 10 A electromagnetic plug-in
relays, two and four poles double thrown - Part 001:
Technical specification
Se´rie ae´rospatiale - Socles pour relais Luft- und Raumfahrt - Fassungen für steckbare,
e´lectromagne´tiques 10 A, embrochables, deux et elektromagnetische Relais, 10 A, zwei- und vierpolige
quatre po^les inverseurs - Partie 001: Spe´cification Wechselschalter - Teil 001: Technische
technique Lieferbedingungen
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2593-001:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Design . 7
4.1 General. 7
4.2 Dimensions. 7
4.3 Crimp contacts for electrical connections . 7
4.4 Cables . 7
4.5 Mechanical characteristics . 7
4.5.1 General. 7
4.5.2 Mounting torque (hardware) . 7
4.5.3 Mass (including crimp contact and hardware) . 7
4.5.4 Insertion force. 7
4.5.5 Extraction force . 7
4.6 Sealing plug . 7
4.6.1 General. 7
4.6.2 Configurations . 7
4.6.3 Dimensions. 7
4.6.4 Quantities . 7
4.7 Insertion and extraction tools . 8
4.7.1 General. 8
4.7.2 Plastic tool . 8
4.7.3 Metal tool . 8
4.8 Metal parts. 8
5 Description . 8
5.1 Materials/features. 8
5.2 Interface seal . 8
5.3 Polarizing holes . 9
5.3.1 Two-pole bases . 9
5.3.2 Four-pole bases . 9
6 Definition drawings and mass . 9
7 Qualification tests . 9
8 Quality assurance . 11
8.1 General. 11
8.2 Qualification procedure . 11
8.2.1 General. 11
8.2.2 Test sequence . 11
8.2.3 Samples preparation . 12
8.3 Acceptance and inspection conditions . 12
8.3.1 Product acceptance tests . 12
8.3.2 Batch acceptance test . 12
8.4 Maintenance of qualification . 12
9 Designation and marking . 14
9.1 Designation . 14
9.2 Marking . 14
10 Delivery conditions . 14
11 Packaging . 14
12 Storage . 14
Bibliography . 15

European foreword
This document (prEN 2593-001:2026) 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 is currently submitted to the CEN Enquiry.
This document will supersede EN 2593-001:2014.
EN 2593-001:2014-12:
— remove the mention “The finish of the crimp contacts shall be: gold-plated — Thickness: 1,27 µm
min” in 5.1;
— add the requirement “layouts for all arrangements shall be provided” in 6;
— add the codes E, F, G, H, J and K in the designation in 9.1.
Introduction
The relay bases specified by this document are derived from MIL-DTL-12883/40 and MIL-DTL-
12883/41, latest issue.
1 Scope
The present document specifies the characteristics, installation and mounting dimensions for plug-in
relay bases for use with two and four poles double throw relays in accordance with EN 2548-001.
Relay bases in accordance with this document shall be used at ambient temperatures between −70 °C
and 125 °C and at altitudes up to 25 000 m.
2 Normative references
...