EN 3645-003:2015
(Main)Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous - Part 003: Receptacle square flange mounting - Product standard
Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous - Part 003: Receptacle square flange mounting - Product standard
This European Standard specifies the characteristics of square flange mounted receptacles in the family of circular electrical connectors with triple start threaded coupling.
It applies to models in Table 3.
For contacts, sealing plugs and cable outlet accessories associated with this receptacle see EN 3645-002. For plugs and protective covers, see EN 3645-008, EN 3645-011, EN 3645-012 and EN 3645-006 respectively.
These connectors are derived from and are interchangeable with those in standard MIL-DTL-38999/20.
Luft- und Raumfahrt - Elektrische Rundsteckverbinder, kontaktgeschützt, dreigängige Gewinde-Schnellkupplung, Betriebstemperatur 175 °C oder 200 °C konstant - Teil 003: Fester Steckverbinder mit quadratischem Montageflansch - Produktnorm
Série aérospatiale - Connecteurs électriques circulaires à contacts protégés, à accouplement par filetage à pas rapide à trois filets, températures d'utilisation 175 °C ou 200 °C continu - Partie 003: Embase à fixation par collerette carrée - Norme de produit
Aeronavtika - Konektorji, električni, okrogli, zaščiteni kontakt, hitra spojka z navojem, stalna delovna temperatura 175 °C ali 200 °C - 003. del: Spojnik s kvadratno montažno prirobnico - Standard za proizvod
Ta evropski standard določa značilnosti spojnikov s kvadratno montažno prirobnico iz družine okroglih električnih konektorjev s hitro spojko z navojem.
Uporablja se za modele iz preglednice 3.
Za kontakte, tesnilne čepe in priključke izhodov kablov, povezane s tem spojnikom, glej standard EN 3645-002. Za čepe in zaščitna prekrivala glej ustrezne standarde EN 3645-008, EN 3645-011, EN 3645-012 in EN 3645-006. Ti konektorji izhajajo iz konektorjev v standardu MIL-DTL-38999/20 in so medsebojno zamenljivi z njimi.
General Information
- Status
- Published
- Publication Date
- 17-Feb-2015
- Withdrawal Date
- 30-Aug-2015
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2 - Electrical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 18-Feb-2015
- Completion Date
- 18-Feb-2015
Relations
- Effective Date
- 10-Sep-2014
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 15-Apr-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3645-003:2015 is a European Standard developed by CEN (European Committee for Standardization) for the aerospace industry. It specifies the characteristics of square flange mounted receptacles, which are part of the family of circular electrical connectors designed for high-reliability and demanding environments. These connectors feature a scoop-proof design and a triple start threaded coupling for fast and secure mating. They are built to operate continuously at 175 °C or 200 °C, making them suitable for challenging aerospace applications. This standard ensures interoperability and interchangeability, as these connectors are derived from and compatible with those outlined in MIL-DTL-38999/20.
Key Topics
- Connector Configuration: The standard focuses on receptacles with a square flange mounting, providing secure and robust installation in aerospace panels and housings.
- Triple Start Threaded Coupling: This mechanism increases speed and reliability during connector mating and unmating, reducing cross-threading risks and assembly time.
- Scoop-Proof Design: Ensures contact protection, minimizing the chance of accidental damage or misalignment during connection.
- High-Temperature Performance: Supports continuous operations at 175 °C or 200 °C, critical for environments exposed to engine compartments or external aerospace conditions.
- Material Options & Durability: Receptacles are available in various materials and finishes (such as cadmium-plated or nickel-plated alloys, composite materials, and stainless steel) to resist corrosion, fluids, and environmental factors.
- Coding & Identification: Provides a clear designation system for model, size, contact arrangement, and specialty features such as grounding and fluid resistance.
- Interchangeability: These receptacles are fully interchangeable with MIL-DTL-38999/20 products, supporting global aerospace supply chains.
Applications
The EN 3645-003:2015 standard is widely applicable in the aerospace sector, particularly where reliable, high-performance electrical interconnects are essential:
- Aircraft Systems: Used for power and signal distribution in avionic systems, control modules, lighting, and instrumentation.
- Spacecraft and Defense: Suitable for defense electronics, communication modules, satellite systems, and other spaces where failure-resilient electrical connections are required.
- Harsh Environment Vehicle Platforms: The connector's resistance to vibration, high temperatures, and corrosive agents supports use in military vehicles and unmanned aerial vehicles (UAVs).
- Maintenance and Upgrades: Standardization facilitates easier maintenance, replacement, and upgrades in both new assemblies and legacy aerospace programs.
Related Standards
To fully apply EN 3645-003:2015 and ensure compatibility with mating parts and accessories, consider the following related documents in the EN 3645 series:
- EN 3645-001: Technical specification for the overall connector family.
- EN 3645-002: Performance specification and contact arrangements for these connectors, including details on sealing plugs and cable outlet accessories.
- EN 3645-006: Standards for protective covers for the receptacles.
- EN 3645-008, EN 3645-011, EN 3645-012: Specifications for corresponding plugs (with grounding options and release mechanisms).
- MIL-DTL-38999/20: U.S. military standard for interchangeable connectors, ensuring EN and MIL compatibility for international projects.
By adhering to EN 3645-003:2015, aerospace manufacturers and system integrators ensure reliable, high-performance electrical connections, supporting safety, maintainability, and international harmonization within aerospace and defense applications.
Get Certified
Connect with accredited certification bodies for this standard
BUREAU VERITAS Certification Germany
Bureau Veritas certification in Germany.
Element Materials Technology
Materials testing and product certification.
AQMS Ltd.
AQMS provides ISO certification to SMEs across the UK.
Sponsored listings
Frequently Asked Questions
EN 3645-003:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous - Part 003: Receptacle square flange mounting - Product standard". This standard covers: This European Standard specifies the characteristics of square flange mounted receptacles in the family of circular electrical connectors with triple start threaded coupling. It applies to models in Table 3. For contacts, sealing plugs and cable outlet accessories associated with this receptacle see EN 3645-002. For plugs and protective covers, see EN 3645-008, EN 3645-011, EN 3645-012 and EN 3645-006 respectively. These connectors are derived from and are interchangeable with those in standard MIL-DTL-38999/20.
This European Standard specifies the characteristics of square flange mounted receptacles in the family of circular electrical connectors with triple start threaded coupling. It applies to models in Table 3. For contacts, sealing plugs and cable outlet accessories associated with this receptacle see EN 3645-002. For plugs and protective covers, see EN 3645-008, EN 3645-011, EN 3645-012 and EN 3645-006 respectively. These connectors are derived from and are interchangeable with those in standard MIL-DTL-38999/20.
EN 3645-003:2015 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 3645-003:2015 has the following relationships with other standards: It is inter standard links to EN 3645-003:2006, EN 3645-008:2015, EN 3645-006:2015, EN 3645-011:2006, EN 3645-012:2006, EN 3645-001:2022, EN 3155-008:2026, EN 4531-001:2017, EN 3660-063:2015, EN 4645-003:2009, EN 4531-003:2012, EN 2591-318:2018, EN 4531-001:2012, EN 3660-002:2006, EN 3155-002:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3645-003:2015 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-april-2015
1DGRPHãþD
SIST EN 3645-003:2009
$HURQDYWLND.RQHNWRUMLHOHNWULþQLRNURJOL]DãþLWHQLNRQWDNWKLWUDVSRMND]
QDYRMHPVWDOQDGHORYQDWHPSHUDWXUDƒ&DOLƒ&GHO 6SRMQLNV
NYDGUDWQRPRQWDåQRSULUREQLFR6WDQGDUG]DSURL]YRG
Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded
coupling, operating temperature 175 °C or 200 °C continuous - Part 003: Receptacle
square flange mounting - Product standard
Luft- und Raumfahrt - Elektrische Rundsteckverbinder, kontaktgeschützt, dreigängige
Gewinde-Schnellkupplung, Betriebstemperatur 175 °C oder 200 °C konstant - Teil 003:
Fester Steckverbinder mit quadratischem Montageflansch - Produktnorm
Série aérospatiale - Connecteurs électriques circulaires à contacts protégés, à
accouplement par filetage à pas rapide à trois filets, températures d'utilisation 175 °C ou
200 °C continu - Partie 003: Embase à fixation par collerette carrée - Norme de produit
Ta slovenski standard je istoveten z: EN 3645-003:2015
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 3645-003
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 49.060 Supersedes EN 3645-003:2006
English Version
Aerospace series - Connectors, electrical, circular, scoop-proof,
triple start threaded coupling, operating temperature 175 °C or
200 °C continuous - Part 003: Receptacle square flange
mounting - Product standard
Série aérospatiale - Connecteurs électriques circulaires à Luft- und Raumfahrt - Elektrische Rundsteckverbinder,
contacts protégés, à accouplement par filetage à pas rapide kontaktgeschützt, dreigängige Gewinde-Schnellkupplung,
à trois filets, températures d'utilisation 175 °C ou 200 °C Betriebstemperatur 175 °C oder 200 °C konstant - Teil 003:
continu - Partie 003: Embase à fixation par collerette carrée Fester Steckverbinder mit quadratischem Montageflansch -
- Norme de produit Produktnorm
This European Standard was approved by CEN on 5 December 2014.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3645-003:2015 E
worldwide for CEN national Members.
Contents Page
Foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
5 Designation . 8
6 Marking . 9
7 Technical specification . 9
Foreword
This document (EN 3645-003:2015) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by August 2015, and conflicting national standards shall be withdrawn
at the latest by August 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 3645-003:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This European Standard specifies the characteristics of square flange mounted receptacles in the family of
circular electrical connectors with triple start threaded coupling.
It applies to models in Table 3.
For contacts, sealing plugs and cable outlet accessories associa
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...