oSIST prEN 2593-001:2026

• 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
• Public Enquiry End Date: 09-Nov-2026
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 07-Sep-2026
• Due Date: 25-Jan-2027
• Ref Project: prEN 2593-001 - Aerospace series — Bases for 10 A electromagnetic plug-in relays, two and four poles double thrown — Part 001: Technical specification

• Revises: SIST EN 2593-001:2015 - 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

oSIST prEN 2593-001:2026 is a draft European Standard developed by the Slovenian Institute for Standardization (SIST) under the CEN technical framework. This document specifies the technical requirements for bases used with 10 A electromagnetic plug-in relays featuring two and four poles, double throw configurations, in line with EN 2548-001. The standard addresses critical aspects such as design features, installation guidelines, mounting dimensions, material specifications, and operational environments for aerospace applications.

Designed for reliability in demanding conditions, relay bases conforming to this standard are suitable for operation within temperature ranges from −70 °C to 125 °C, and at altitudes up to 25,000 m. The standard ensures compatibility, safety, and quality assurance for aerospace relay base installations.

Key Topics

• Compatibility and Configuration
  Relay bases are intended for plug-in electromagnetic relays (10 A) with two or four poles, double throw. They are tailored to work with relays meeting EN 2548-001 and are available in multiple layouts.

• Environmental Performance
  Bases must perform reliably under extreme conditions:

  • Temperature: −70 °C to 125 °C
  • Altitude: up to 25,000 m

• Material and Construction

  • Socket body: non-flammable thermoplastics in compliance with EN 2349-100
  • Sealing components: non-flammable silicon rubber to provide electrical isolation and environmental sealing
  • Metals: non-magnetic, corrosion-resistant steel parts for mounting hardware
  • Crimp contacts: according to EN 3155-017

• Polarization and Keying
  Polarizing holes and pin arrangements prevent mismatched relay installation, enhancing safety and maintainability in aerospace systems.

• Installation and Mounting
  Dimensional and mechanical specifications (referencing EN 2593-003, EN 2593-004, and EN 2593-005) ensure secure and standardized installation across different relay configurations.

• Qualification and Testing Requirements
  The standard mandates rigorous quality assurance procedures, including qualification tests (vibration, shock, thermal cycling, corrosion resistance), acceptance criteria, and ongoing maintenance of qualification, referencing EN 2349-100 requirements.

Applications

• Aerospace Systems
  Used in aircraft electrical systems and avionic equipment where reliability under extreme environmental conditions is critical.

• Military and Defense Avionics
  Suitable for military-grade relay installations requiring conformity with European and NATO standards.

• Spacecraft and High-altitude Platforms
  Ensures secure relay connections for satellites and high-altitude applications, emphasizing operational performance at low pressure, extreme temperatures, and high vibration loads.

• OEM Manufacturing and Maintenance
  Relevant for manufacturers and maintainers of aircraft and related equipment, supporting standardized relay base installations and simplifying logistics and replacement.

Related Standards

• EN 2548-001: Electromagnetic relays, 10 A, plug-in type - Technical specification
• EN 2349 (all parts): Aerospace switching devices - Requirements and test procedures
• EN 2593-003/004/005: Additional parts specifying relay base types and mounting options
• EN 3155-017: Electrical contacts, relay base, female crimp, class P - Product standard
• MIL-DTL-12883/40 & /41: US military specifications for relay sockets, providing the original basis for this European standard

---

By providing clear guidelines for design, installation, and quality assurance, oSIST prEN 2593-001:2026 enables aerospace manufacturers and operators to implement safe, reliable, and standardized relay base solutions across critical systems. Compliance ensures compatibility, interchangeability, and long-term operational assurance in demanding environments, aligning with international best practices in aerospace electrical equipment.

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
...