Aerospace series - Modular interconnection systems - Terminal junction systems - Part 001: Technical specification

This standard specifies the general characteristics of terminal junction systems for modular interconnection systems as well as test conditions, test programme and groups for quality assurance.
It applies to products specially adapted to provide connections within a very reduced space for variable extendable, divisible, transformable and interchangeable combinations of equipment within a temperature range from - 55 °C to 175 °C, and for altitudes up to 21 000 m for sealed modules or up to 13 700 m for unsealed modules. The conditions of use shall be in accordance with EN 2282.
It also applies to interconnections incorporating components.

Luft- und Raumfahrt - Verteilersysteme in modularer Bauweise - Verteilermodule - Teil 001: Technische Lieferbedingungen

Diese Norm legt die allgemeinen Eigenschaften für Verteilersysteme in modularer Bauweise sowie die Prüfbe¬dingungen, Prüfprogramm und -gruppe für die Qualitätssicherung fest.
Sie gilt für besonders anpassungsfähige Erzeugnisse zur Herstellung von Verbindungen von variablen, ausbaufähigen, teilbaren, umwandlungsfähigen und austauschbaren Aufbaus auf sehr engem Raum innerhalb eines Temperaturbereiches von – 55 °C bis 175 °C und für Flughöhen bis 21 000 m bei abgedich¬teten Modulen oder 13 700 m bei nicht abgedichteten Modulen. Die Einsatzbedingungen müssen in Überein¬stimmung mit EN 2282 sein.
Sie gilt auch für Verbindungen mit eingebauten Bauelementen.

Série aérospatiale - Systèmes d'interconnexions modulaires - Barrettes de raccordement - Partie 001 : Spécification technique

Aeronavtika - Modularni medsebojno povezljivi sistemi - Razdelilni moduli - 001. del: Tehnična specifikacija

General Information

Status
Published
Publication Date
16-May-2006
Withdrawal Date
29-Nov-2006
ICS
49.060 - Aerospace electric equipment and systems
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 2 - Electrical
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
01-Jun-2017
Completion Date
21-Jan-2026
Ref Project
SIST EN 3708-001:2009 - Aerospace series - Modular interconnection systems - Terminal junction systems - Part 001: Technical specification

Relations

Refers
EN 2266-002:2005 - Aerospace series - Cables, electrical, for general purpose - Operating temperatures between - 55 °C and 200 °C - Part 002: General
Effective Date
28-Jan-2026
Refers
EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
Effective Date
28-Jan-2026
Refers
EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
Effective Date
28-Jan-2026
Referred By
EN 4529-002:2006 - Aerospace series - Elements of electrical and optical connection - Sealing plugs - Part 002: Index of product standards
Effective Date
28-Jan-2026
Referred By
EN 3708-005:2006 - Aerospace series - Modular interconnection systems - Terminal junction systems - Part 005: Frames with accessories for feedback modules version, sealed and unsealed - Product standard
Effective Date
28-Jan-2026
Referred By
EN 3155-016:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 016: Contacts, electrical, male, type A, crimp, class S - Product standard
Effective Date
28-Jan-2026
Referred By
EN 3155-016:2025 - Aerospace series - Electrical contacts used in elements of connection - Part 016: Contacts, electrical, male, type A, crimp, class S - Product standard
Effective Date
28-Jan-2026
Referred By
EN 3708-004:2006 - Aerospace series - Modular interconnection systems - Terminal junction systems - Part 004: Removable feedback modules version, unsealed - Product standard
Effective Date
28-Jan-2026
Referred By
EN 3708-003:2006 - Aerospace series - Modular interconnection systems - Terminal junction systems - Part 003: Removable feedback modules version, sealed - Product standard
Effective Date
28-Jan-2026
Referred By
EN 3708-002:2006 - Aerospace series - Modular interconnection systems - Terminal junction systems - Part 002: Performance specification
Effective Date
28-Jan-2026
Referred By
EN 3155-002:2011 - Aerospace series - Electrical contacts used in elements of connection - Part 002: List and utilization of contacts
Effective Date
28-Jan-2026

Overview

EN 3708-001:2006 - published by CEN - is the technical specification for aerospace modular interconnection systems, specifically terminal junction systems. The standard defines general characteristics, test conditions, test programmes and quality assurance groups for modular connectors and removable modules used in tight-space aerospace applications. It covers products and interconnections designed to operate from −55 °C to 175 °C and at altitudes up to 21 000 m (sealed modules) or 13 700 m (unsealed modules). Use conditions reference EN 2282.

Key Topics and Requirements

  • Product scope: removable feedback and feed‑through modules, frames, mounting carriers, connectors/extension pieces, individual terminals, earth modules and modules with components.
  • Environmental limits: temperature range −55 °C to 175 °C; sealed vs. unsealed altitude limits as above.
  • Contact sizes: sizes 22, 20, 16, 12 (unsealed modules exclude sizes 16 and 12).
  • Design principles: lightweight materials where unspecified, corrosion protection when dissimilar metals contact (EMF ≤ 0.25 V), accessible contact insertion/extraction without impairing function.
  • Electrical tests:
    • Low‑level contact resistance limits (per contact): 22 → 5 mΩ, 20 → 4 mΩ, 16 → 3 mΩ, 12 → 2 mΩ (values divided by two for single contact in paired measurements).
    • Contact resistance at rated current and electrical overload procedures (specified currents/durations per contact size, e.g., size 22 overload conditions: 10.5 A for 15 s, 75 A for 3 600 s, etc.).
    • Insulation resistance: 5 000 MΩ ambient for fully wired specimens; post‑test minima for various sequences.
    • Voltage proof: up to 1 500 V r.m.s. (normal pressure) and reduced voltages for low‑pressure tests with max leakage 2 mA.
  • Climatic and environmental tests: damp heat, cold/low pressure, rapid temperature change, salt mist, fluid and ozone resistance, fungus testing and more.
  • Quality assurance: qualification, initial qualification conditions, maintenance of qualification, acceptance/inspection, marking, packaging and storage requirements.

Applications and Users

EN 3708-001:2006 is directly relevant to:

  • Aerospace electrical system designers and avionics engineers specifying modular junctions for cockpits, equipment bays and compact harnesses.
  • Connector and module manufacturers producing removable modules, extension pieces, earth modules and componentized connectors.
  • Test laboratories performing qualification and environmental testing of aerospace interconnects.
  • Quality, procurement and certification teams ensuring components meet aerospace temperature, altitude and reliability requirements.

Typical applications include modular avionics racks, removable terminal panels, compact interconnection systems for variable or interchangeable equipment, and sealed modules for high‑altitude aircraft/space systems.

Related Standards (select)

  • EN 3708-002 - Performance specification for modular interconnection systems
  • EN 2282 - Characteristics of aircraft electrical supplies
  • EN 2591-100 - Elements of connection - Test methods (general)
  • EN 3155-016 - Electrical contacts, crimp type (product standard)
  • EN 2266-002, EN 9133 and relevant MIL / SAE documents referenced for fluids, lubricants and cleaning

Keywords: EN 3708-001:2006, modular interconnection systems, terminal junction systems, aerospace standard, sealed modules, unsealed modules, contact resistance, quality assurance, environmental testing.

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Frequently Asked Questions

EN 3708-001:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Modular interconnection systems - Terminal junction systems - Part 001: Technical specification". This standard covers: This standard specifies the general characteristics of terminal junction systems for modular interconnection systems as well as test conditions, test programme and groups for quality assurance. It applies to products specially adapted to provide connections within a very reduced space for variable extendable, divisible, transformable and interchangeable combinations of equipment within a temperature range from - 55 °C to 175 °C, and for altitudes up to 21 000 m for sealed modules or up to 13 700 m for unsealed modules. The conditions of use shall be in accordance with EN 2282. It also applies to interconnections incorporating components.

This standard specifies the general characteristics of terminal junction systems for modular interconnection systems as well as test conditions, test programme and groups for quality assurance. It applies to products specially adapted to provide connections within a very reduced space for variable extendable, divisible, transformable and interchangeable combinations of equipment within a temperature range from - 55 °C to 175 °C, and for altitudes up to 21 000 m for sealed modules or up to 13 700 m for unsealed modules. The conditions of use shall be in accordance with EN 2282. It also applies to interconnections incorporating components.

EN 3708-001:2006 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 3708-001:2006 has the following relationships with other standards: It is inter standard links to EN 2266-002:2005, EN 9133:2018, EN 2591-100:2024, EN 4529-002:2006, EN 3708-005:2006, EN 3155-016:2019, EN 3155-016:2025, EN 3708-004:2006, EN 3708-003:2006, EN 3708-002:2006, EN 3155-002:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 3708-001:2006 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)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Verteilersysteme in modularer Bauweise - Verteilermodule - Teil 001: Technische LieferbedingungenSérie aérospatiale - Systèmes d'interconnexions modulaires - Barrettes de raccordement - Partie 001 : Spécification techniqueAerospace series - Modular interconnection systems - Terminal junction systems - Part 001: Technical specification49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3708-001:2006SIST EN 3708-001:2009en,de01-september-2009SIST EN 3708-001:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3708-001May 2006ICS 49.060 English VersionAerospace series - Modular interconnection systems - Terminaljunction systems - Part 001: Technical specificationSérie aérospatiale - Systèmes d'interconnexionsmodulaires - Barrettes de raccordement - Partie 001 :Spécification techniqueLuft- und Raumfahrt - Verteilersystem in modularerBauweise - Verteilermodule - Teil 001: TechnischeLieferbedingungenThis European Standard was approved by CEN on 9 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3708-001:2006: ESIST EN 3708-001:2009

EN 2282, Aerospace series — Characteristics of aircraft electrical supplies. EN 2591-100*, Aerospace series — Elements of electrical and optical connection — Test methods — Part 100: General. EN 3155-016, Aerospace series — Electrical contacts used in elements of connection — Part 016: Contacts, electrical, male, type A, crimp, class S — Product standard. 1) EN 3708-002, Aerospace series — Modular interconnection systems — Terminal junction systems — Part 002: Performance specification.
EN 9133, Aerospace series — Quality management systems — Qualification Procedure for aerospace standard parts. MIL-PRF-7870C, Lubricating oil, general purpose, low temperature. 2) MIL-PRF-23699F, Lubricating oil, aircraft turbine engine, synthetic base, nato code number O-156. 2) MIL-PRF-87937D, Cleaning compound, aerospace equipment. 2)
MIL-HDBK-454A, General guidelines for electronic equipment (Guideline 4: Fungus - Inert materials). 2) AMS 1424, Deicing/anti-icing fluid, aircraft — SAE Type I. 3)
AS 1241C, Fire resistant phosphate ester hydraulic fluid for aircraft. 3)
* Including all its parts quoted. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published by: Department of Defense (DOD), the Pentagon, Washington, D.C. 20301 USA. 3) Published by: Society of Automotive Engineers, Inc. (SAE) 400 Commonwealth Drive, Warrendale, PA 15096-001 USA. SIST EN 3708-001:2009

Contact size Contact resistance mΩ
22 5
20 4
16 3
12 2
202 Contact resistance at rated current See Figures 1 and 2. The contact resistance shall not exceed the value shown in the table below. The values recorded shall be divided by two to give the contact resistance of one contact.
Contact size Contact resistance mΩ Rated current
A
22 5 5
20 4 7,5
16 3 13
12 2 23
continued SIST EN 3708-001:2009

Key 1 Maximum section 2 Feedback module Figure 1 — Resistance test for feedback module
Key 1 Feed-through module Figure 2 — Resistance test for feed-through module continued SIST EN 3708-001:2009

205 Housing (shell) electrical continuity Not applicable 206 Measurement of insulation resistance Method C Fully wired specimens. Insulation resistance at ambient temperature: 5 000 MΩ min. During test EN 2591-303 and after test EN 2591-304: 100 MΩ min. During test EN 2591-301 and
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