prEN 3682-002

• Abstract:

  This document specifies the common conditions for plug and receptacle, rack to panel with interchangeable insulators and continuous temperature rating 150 °C.

• Status: Not Published
• Publication Date: 22-Feb-2028
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2/S 3 - Elements of Connection (Connectors, Contacts, rear accessories, crimping tools
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 01-Oct-2026
• Completion Date: 01-Oct-2026
• Ref Project: oSIST prEN 3682-002:2026 - Aerospace series - Connectors, plug and receptacle, electrical, rectangular, interchangeable insert type, rack to panel, operating temperature 150 °C continuous - Part 002: Specification of performance and contact arrangements

• Referred By: EN ISO 734:2023 - Oilseed meals - Determination of oil content - Extraction method with hexane (or light petroleum) (ISO 734:2023)
• Effective Date: 28-Jan-2026
• Referred By: EN 17462:2021 - Animal feeding stuffs: Methods of sampling and analysis - Determination of the radionuclides Iodine-131, Caesium-134 and Caesium-137 in feed
• Effective Date: 28-Jan-2026
• Revises: EN 3682-002:2013 - Aerospace series - Connectors, plug and receptacle, electrical, rectangular, interchangeable insert type, rack to panel, operating temperature 150 °C continuous - Part 002: Specification of performance and contact arrangements
• Effective Date: 03-May-2023

prEN 3682-002 is a draft European Standard from CEN for aerospace electrical connectors, specifically rectangular plug and receptacle connectors with interchangeable inserts for rack-to-panel use and a continuous operating temperature of 150 °C. It specifies the common conditions, performance data, contact arrangements, and related interface details for engineers, manufacturers, and buyers working with this connector family.

What does prEN 3682-002 specify?

prEN 3682-002 sets the common requirements for plug and receptacle connectors with interchangeable insulators, designed for rack-to-panel applications at 150 °C continuous operating temperature. It is organized into clauses on scope, normative references, terms and definitions, model description, operating conditions, product standards, polarization, contact arrangements and insert combinations, contacts, sealing plugs, tooling, and assembly and wiring instructions.

The introduction states that this connector family is derived from MIL-DTL-83527 and is intermateable with it. That matters in practice because interface compatibility can affect interchangeability during design, procurement, and maintenance planning.

What are the key requirements of prEN 3682-002?

prEN 3682-002 focuses on the connector envelope, electrical performance, environmental capability, and the allowed contact layouts. The most important points are the model range, cable compatibility, operating limits, polarization system, and the approved insert combinations.

Model and construction

Clause 4 describes electrical rectangular rack-panel connectors with environmental resistance, shell sizes 2, 3, and 4, and crimp contact class R. In practice, this tells the reader which connector body sizes and contact style are covered by the standard.

Permissible cables and wiring basis

Clause 5.1 gives the cable dimensions that support the connector performance, including conductor sizes and outer cable diameters. It also ties performance to the specified accessories and wiring tools. This matters because the connector is qualified as a system with defined cable ranges, not as a free-choice interface.

Electrical operating conditions

Clause 5.2.1 sets the electrical conditions, including rated current according to the contact standards, insulation resistance of 5 000 MΩ at ambient temperature, and withstand voltage values for sea level and for 33 000 m. Different values are given for 22 AWG contacts, thicker gauge contacts, and triaxial, coaxial, and quadrax contacts. For users, this is the key data for insulation coordination, test planning, and selecting the right contact type for the application.

Climatic and mechanical performance

Clause 5.2.2 defines the operating temperature range from -65 °C to 150 °C, and requires corrosion resistance and fluid resistance in accordance with EN 3682-001. Clause 5.2.3 sets mechanical endurance at 500 mating and unmating operations. These requirements matter when checking whether the connector suits the aircraft environment and the intended maintenance cycle.

Product family links

Clause 6 connects the part to the rest of the EN 3682 series. Inserts are covered by EN 3682-003, and shell sizes 2, 3, and 4 are split into separate plug and receptacle product standards. This helps purchasers and designers choose the correct companion parts instead of treating the connector as a single standalone item.

Polarization and keying

Clause 7 defines the coding key positions and states that they provide 99 standard locating codes. Figures 1 and 2, together with Tables 3 and 4, show the key positions from the front of the connector. In practice, this prevents incorrect mating between similar connectors and supports controlled polarization during installation.

Contact arrangements and insert combinations

Clause 8 is the main selection section. Table 5 and Figures 3 to 24 define the approved contact arrangements by insulator type, number of contacts, and contact size, including mixed arrangements with coaxial, triaxial, and quadrax contacts. Table 6 then assigns insert combination codes by shell size and cavity population. This is the data engineers use to define the exact connector variant for a wiring layout.

Contacts, sealing plugs, tooling, and assembly

Clause 9 lists the usable contact types and their EN 3155 part references. Clause 10 requires sealing plugs from EN 4529-002 in grommet cavities that correspond to unwired contacts. Clause 11 points to the EN 3155 series for crimping, installation, and extraction tooling, and clause 12 requires assembly and wiring in accordance with EN 3197. These clauses matter because the connector is only valid when assembled with the right contacts, blanks, tools, and installation method.

What terms does prEN 3682-002 define?

• LRU - line replaceable unit, a replaceable aircraft unit used in the connector context.
• Polarization - the coded key position system that controls how mating connectors are oriented and matched.
• Contact arrangement - the defined mix of contacts in an insert, including size and quantity.
• Insert combination - the coded combination of insert layouts used on a shell for the cavities A to F.
• Shell size - the connector body size class, here 2, 3, or 4.
• Crimp contact class R - the contact style identified for this connector family in the model description.
• Rack to panel - the mounting style intended for equipment rack and panel interfaces.
• Interchangeable insulators - inserts that can be selected in different approved combinations within the connector family.

Who uses prEN 3682-002?

prEN 3682-002 is used by aerospace connector designers, harness and wiring engineers, test laboratories, and suppliers of aircraft electrical interconnection hardware. It is also relevant to quality managers and buyers who need to verify connector performance, contact layouts, and compatibility with the rest of the EN 3682 family.

The standard is especially useful where equipment uses rack-panel connectors, mixed signal and power contacts, or maintenance-oriented designs that must match approved insert combinations and tooling. Because the document is linked to EN 3197, it also supports installation and assembly work on aircraft electrical and optical interconnection systems.

What changed in prEN 3682-002 from the previous edition?

prEN 3682-002 will supersede EN 3682-002:2013. The foreword states two technical changes with respect to that edition:

• Table 6 insert combinations now introduces codes 288 to 292.
• The contact arrangements have been updated.

Which standards are used with prEN 3682-002?

• EN 2591-100 - provides the general test methods for electrical and optical connection elements used when verifying connector performance.
• EN 3197 - gives the assembly and wiring instruction framework for aircraft electrical and optical interconnection systems.
• EN 3682-001 - provides the technical specification used for corrosion resistance and fluid resistance.
• EN 4529-002 - identifies the sealing plugs to use in unwired grommet cavities.
• EN 3682-003 to EN 3682-009 - define the inserts, receptacles, and plugs that make up the product family for shell sizes 2, 3, and 4.
• EN 3155 series parts - define the contact types and the related tooling used with the connector, including crimp, solder, coaxial, triaxial, and quadrax contacts.

What does the prEN 3682-002 document contain?

Clause 5 contains the operating-condition data, including a cable table and the electrical, climatic, and mechanical conditions used for qualification and selection. Clause 7 contains the polarization system, supported by two figures and two tables of key positions. Clause 8 contains the detailed contact-arrangement tables and the insert-combination codes, including the shell-size and cavity layouts used for product definition.

The document also includes a contact table in clause 9, a sealing-plug rule in clause 10, tooling guidance in clause 11, and an assembly-and-wiring requirement in clause 12. Together, these sections provide the technical basis for specifying, building, and installing the connector family without reproducing the underlying design tables here.

SLOVENSKI STANDARD
01-december-2026
Aeronavtika - Konektorji, vtič in vtičnica, električni, pravokotni, zamenljivi tip, s
stojalom in ploščo, s stalno delovno temperaturo do 150 °C - 002. del:
Specifikacija lastnosti in razporeditev kontaktov
Aerospace series - Connectors, plug and receptacle, electrical, rectangular,
interchangeable insert type, rack to panel, operating temperature 150 °C continuous -
Part 002: Specification of performance and contact arrangements
Luft- und Raumfahrt - Elektrischer Rechtecksteckverbinder, freie und feste Bauform,
auswechselbare Isolierkörper, Gestell-Einschubsteckverbinder, Betriebstemperatur 150
°C konstant - Teil 002: Leistungsdaten und Kontaktanordnungen
Série aérospatiale - Connecteurs électriques rectangulaires rackables, fiches et
embases, à inserts interchangeables, temperature d’utilisation 150 °C continu - Partie
002 : Spécification de performances et arrangements de contacts
Ta slovenski standard je istoveten z: prEN 3682-002
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
September 2026
ICS Will supersede EN 3682-002:2013
English Version
Aerospace series - Connectors, plug and receptacle,
electrical, rectangular, interchangeable insert type, rack to
panel, operating temperature 150 °C continuous - Part
002: Specification of performance and contact
arrangements
Série aérospatiale - Connecteurs électriques Luft- und Raumfahrt - Elektrischer
rectangulaires rackables, fiches et embases, à inserts Rechtecksteckverbinder, freie und feste Bauform,
interchangeables, temperature d'utilisation 150 °C auswechselbare Isolierkörper, Gestell-
continu - Partie 002 : Spécification de performances et Einschubsteckverbinder, Betriebstemperatur 150 °C
arrangements de contacts konstant - Teil 002: Leistungsdaten und
Kontaktanordnungen
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 3682-002:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description of models . 5
5 Operating conditions . 5
5.1 Permissible cables . 5
5.2 Operating characteristics . 6
5.2.1 Electrical conditions . 6
5.2.2 Climatic conditions . 7
5.2.3 Mechanical conditions . 7
6 Product standards . 7
7 Polarization . 7
8 Contact arrangements and insert combinations . 13
8.1 Contact arrangements . 13
8.2 Insert combinations . 25
9 Contacts . 28
10 Sealing plugs . 28
11 Tooling . 28
12 Assembly and wiring instruction . 28
Bibliography . 29

European foreword
This document (prEN 3682-002:2026) 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 3682-002:2013.
EN 3682-002:2013:
— Table 6 insert combinations: introduction of codes 288 to 292 and update of code 263;
— update of contact arrangements.
Introduction
This family of connectors is derived from MIL-DTL-83527 with which it is intermateable.
1 Scope
This document specifies the common conditions for plug and receptacle, rack to panel with
interchangeable insulators and continuous temperature rating 150 °C.
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 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 3682-001, Aerospace series — Connectors, plug and receptacle, electrical, rectangular, interchangeable
insert type, rack to panel, operating temperature 150 °C continuous — Part 001: Technical specification
EN 4529-002, Aerospace series — Elements of electrical and optical connection — Sealing plugs —
Part 002: Index of product standards
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 2591-100 and the following
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/
3.1
LRU
line replaceable unit
4 Description of models
Electrical rectangular rack panel connectors, environmental resisting with 3 shell sizes 2, 3 and 4, crimp
contact class R.
5 Operating conditions
5.1 Permissible cables
The performance of these connectors is achieved with the cables of the dimensions in accordance with
Table 1 and using the accessories and wiring tools specified.
Table 1
Size Size of conductors Outer diameter of cables
Standard cables
mm
a
Contact Barrel AWG min. max.
22 22 24 0,76 1,32
20 20 22 0,89 1,52
16 16 18 1,21 2,03
12 12 2,31 2,90
Cavity #8 — 3,69 6,86
Cavity #5 — 4,85 5,49
Cavity #1 — 10,62 10,97
a
AWG: Closest American Wire Gauge.
5.2 Operating characteristics
5.2.1 Electrical conditions
The electrical conditions shall be the following:
— rated current: according to standards for contacts;
— insulation resistance at ambient temperature: 5 000 MΩ;
— withstand voltage at sea level:
— 22 AWG contacts: 1 300 V r.m.s;
— thicker gauge contacts: 1 500 V r.m.s;
— triaxial contacts: 500 V r.m.s;
— coaxial contacts: 500 V r.m.s;
— quadrax contacts : 500 V r.m.s;
— withstand voltage at 33 000 m:
— connectors mated together: 750 V r.m.s;
— connectors unmated: 200 V r.m.s.
5.2.2 Climatic conditions
The climatic conditions shall be the following:
— operating temperatures:
— minimum temperature: −65 °C;
— maximum temperature: 150 °C;
— corrosion resistance and fluid resistance shall be in accordance with EN 3682-001.
5.2.3 Mechanical conditions
Mechanical endurance shall be: 500 mating and unmating operations.
6 Product standards
Associated product standards are given in Table 2.
Table 2 — Components and associated product standards
Component Part of the EN 3682 series
Inserts EN 3682-003
Receptacle size 2 EN 3682-004
Plug size 2 EN 3682-005
Receptacle size 3 EN 3682-006
Plug size 3 EN 3682-007
Receptacle size 4 EN 3682-008
Plug size 4 EN 3682-009
7 Polarization
Figure 1 and Figure 2 and Table 3 and Table 4 show the various positions of the coding keys, which
provide 99 standard different locating codes.
The shaded area indicates the male key and the lighted area corresponds to the female key. Keys are
viewed from the front of the connector, and the top of the connector is facing upwards.

Figure 1
Table 3 — Polarization
Position left centre right
00 Keys not assembled
01 1 1 1
02 2 1 1
03 3 1 1
04 4 1 1
05 5 1 1
06 6 1 1
07 1 1 6
08 2 1 6
09 3 1 6
10 4 1 6
11 5 1 6
12 6 1 6
13 1 1 5
14 2 1 5
15 3 1 5
16 4 1 5
17 5 1 5
18 6 1 5
19 1 1 4
20 2 1 4
21 3 1 4
22 4 1 4
23 5 1 4
24 6 1 4
25 1 1 3
26 2 1 3
27 3 1 3
28 4 1 3
29 5 1 3
30 6 1 3
31 1 1 2
32 2 1 2
33 3 1 2
34 4 1 2
35 5 1 2
36 6 1 2
Position left centre right
37 1 1 1
38 2 2 1
39 3 2 1
40 4 2 1
41 5 2 1
42 6 2 1
43 1 2 6
44 2 2 6
45 3 2 6
46 4 2 6
47 5 2 6
48 6 2 6
49 1 2 5
50 2 2 5
51 3 2 5
52 4 2 5
53 5 2 5
54 6 2 5
55 1 2 4
56 2 2 4
57 3 2 4
58 4 2 4
59 5 2 4
60 6 2 4
61 1 2 3
62 2 2 3
63 3 2 3
64 4 2 3
65 5 2 3
66 6 2 3
67 1 2 2
68 2 2 2
69 3 2 2
70 4 2 2
71 5 2 2
72 6 2 2
73 1 3 1
74 2 3 1
Position left centre right
75 3 3 1
76 4 3 1
77 5 3 1
78 6 3 1
79 1 3 6
80 2 3 6
81 3 3 6
82 4 3 6
83 5 3 6
84 6 3 6
85 1 3 5
86 2 3 5
87 3 3 5
88 4 3 5
89 5 3 5
90 6 3 5
91 1 3 4
92 2 3 4
93 3 3 4
94 4 3 4
95 5 3 4
96 6 3 4
97 1 3 3
98 2 3 3
99 3 3 3
Figure 2
Table 4 — Polarization
Position left centre right
00 Keys not assembled
01 4 4 4
02 4 4 3
03 4 4 2
04 4 4 1
05 4 4 6
06 4 4 5
07 5 4 4
08 5 4 3
09 5 4 2
10 5 4 1
11 5 4 6
12 5 4 5
13 6 4 4
14 6 4 3
15 6 4 2
16 6 4 1
17 6 4 6
18 6 4 5
19 1 4 4
20 1 4 3
21 1 4 2
22 1 4 1
23 1 4 6
24 1 4 5
25 2 4 4
26 2 4 3
27 2 4 2
28 2 4 1
29 2 4 6
30 2 4 5
31 3 4 4
32 3 4 3
33 3 4 2
34 3 4 1
35 3 4 6
36 3 4 5
Position left centre right
37 4 3 4
38 4 3 3
39 4 3 2
40 4 3 1
41 4 3 6
42 4 3 5
43 5 3 4
44 5 3 3
45 5 3 2
46 5 3 1
47 5 3 6
48 5 3 5
49 6 3 4
50 6 3 3
51 6 3 2
52 6 3 1
53 6 3 6
54 6 3 5
55 1 3 4
56 1 3 3
57 1 3 2
58 1 3 1
59 1 3 6
60 1 3 5
61 2 3 4
62 2 3 3
63 2 3 2
64 2 3 1
65 2 3 6
66 2 3 5
67 3 3 4
68 3 3 3
69 3 3 2
70 3 3 1
71 3 3 6
72 3 3 5
73 4 2 4
74 4 2 3
Positi
...