prEN 3646-001

SLOVENSKI STANDARD
01-maj-2024
Aeronavtika - Konektorji, električni, okrogli, bajonetno sklapljanje, stalna delovna
temperatura 175 °C ali 200 °C - 001. del: Tehnična specifikacija
Aerospace series - Connectors, electrical, circular, bayonet coupling, operating
temperature 175 °C or 200 °C continuous - Part 001: Technical specification
Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Bajonettkupplung,
Betriebstemperatur 175 °C oder 200 °C konstant - Teil 001: Technische
Lieferbedingungen
Série aérospatiale - Connecteurs électriques circulaires à accouplement par baïonnettes,
température d' utilisation 175 °C ou 200 °C continu - Partie 001: Spécification technique
Ta slovenski standard je istoveten z: prEN 3646-001
ICS:
31.220.10 Vtiči in vtičnice, konektorji Plug-and-socket devices.
Connectors
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
March 2024
ICS 49.060 Will supersede EN 3646-001:2015
English Version
Aerospace series - Connectors, electrical, circular, bayonet
coupling, operating temperature 175 °C or 200 °C
continuous - Part 001: Technical specification
Série aérospatiale - Connecteurs électriques circulaires Luft- und Raumfahrt - Elektrische Rundsteckverbinder
à accouplement par baïonnettes, température d' mit Bajonettkupplung, Betriebstemperatur 175 °C oder
utilisation 175 °C ou 200 °C continu - Partie 001: 200 °C konstant - Teil 001: Technische
Spécification 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3646-001:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 6
4.1 General . 6
4.2 Receptacle . 6
4.3 Plug . 6
4.4 Materials and surface treatment . 6
5 Design . 7
5.1 Housings . 7
5.2 Inserts . 7
6 Definition drawings and masses . 8
6.1 General . 8
6.2 Receptacle mating dimensions . 8
6.3 Plug mating dimensions . 11
6.4 Receptacle and plug polarization . 12
6.5 Dimensions of the rear part . 15
6.6 Contact arrangements . 17
6.7 Dimensions of contacts . 34
7 Tests . 34
7.1 General . 34
7.2 Gauges to test the holding force of the grounding spring system of the housing . 44
7.3 Gauges to test the stability of male contacts in insert . 46
8 Quality assurance. 46
8.1 General . 46
8.2 Qualification . 47
8.3 Maintenance of qualification . 52
8.4 Routing test during production . 53
8.5 Quality control . 53
9 Designation and marking . 53
9.1 General principle of designation . 53
9.2 Marking . 53
10 Delivery conditions . 53
11 Packaging . 54
12 Storage . 54
Bibliography. 55

European foreword
This document (prEN 3646-001:2024) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 3646-001:2015.
The main changes compared to the previous edition are as follows:
— normative references updated;
— key and keyway quotation replaced in Figure 3;
— editorial revision of the document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.

Introduction
This family of connectors is derived from MIL-DTL-26482, series 2, the NAS 1599 bayonet connector with
which it is intermateable and which uses AS-39029 for the contacts. It is particularly suitable for use on
aircraft applying EN 2282.
These connectors are distinguishable from MIL-DTL-26482 and NAS 1599 by:
— being of a lower mass;
— having reduced dimensions;
— accepting smaller cables.
1 Scope
This document specifies the general characteristics, the conditions for qualification, acceptance and
quality assurance, as well as the test programmes and groups for bayonet coupling circular connectors,
intended for use in an operating temperature range of –65 °C to 175 °C or 200 °C continuous according
to the class and models.
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 2266-002, Aerospace series - Cables, electrical, for general purpose - Operating temperatures between -
55 °C and 200 °C - Part 002: General
EN 2591, Aerospace series — Elements of electrical and optical connection — Test methods
EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 100: General
EN 3197, Aerospace series - Design and installation of aircraft electrical and optical interconnection systems
EN 3646-002, Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature
175 °C or 200 °C continuous - Part 002: Specification of performance and contact arrangements
EN 9133, Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard
Products
ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range
0,06 to 6 in
ISO 27874, Metallic and other inorganic coatings — Electrodeposited gold and gold alloy coatings for
electrical, electronic and engineering purposes — Specification and test methods
MIL-HDBK-454, General guidelines for electronic equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 2591-100 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/

All parts quoted in this standard.
Published by: Published by: DEFENSE LOGISTICS AGENCY DLA Land and Maritime (US),
https://landandmaritimeapps.dla.mil/Programs/MilSpec/DocSearch.aspx.
4 Description
4.1 General
Different variants of materials, housings and contact arrangements are provided according to the models
depending on the service conditions.
These connectors use crimp or solder contacts of size 20, size 16 and size 12.
The receptacles and plugs contain either male contacts or female contacts.
The contacts fitted in the model Y receptacles are exclusively of the male non-removable solder type.
The connectors are polarized by means of keyways and keys. When all the male contacts are in place,
polarization is obtained by different angular positions of the insulator in relation to the main slot or
locking key and shall occur before the coupling ring can carry out its function.
The visual check of coupling is obtained by viewing the locking pins through the inspection holes in the
coupling ring of the plug.
4.2 Receptacle
The receptacle may be attached by:
— square flange;
— nut, with sealing by O-ring at the attachment;
— round soldered or brazed flange for model Y connectors.
The receptacle contains five keyways in which the keys of the plug engage. The main keyway is fixed and
is wider than the others. Polarization is ensured by the different an
...