prEN 3155-066
(Main)Aerospace series - Electrical contacts used in elements of connection - Part 066: Contacts, electrical, female, type A, crimp, class S, size 8 - Product standard
General Information
- Abstract
This document specifies the required characteristics, tests and tooling applicable to female electrical contacts, type A, crimp, class S, size 8, used in elements of connection in accordance with EN 3155-002.
It can be used together with EN 3155-001.
The associated male contacts are specified in EN 3155-065.
- Status
- Not Published
- Publication Date
- 02-Jan-2028
- Technical Committee
- ASD-STAN - Aerospace
- Current Stage
- 4020 - Submission to enquiry - Enquiry
- Start Date
- 02-Jul-2026
- Completion Date
- 02-Jul-2026
Overview
prEN 3155-066 is a critical draft standard developed by CEN for the aerospace industry, covering female electrical contacts, type A, crimp, class S, size 8, utilized in connection elements. This standard outlines required characteristics, testing protocols, permissible cables, and tooling related to these electrical contacts. Serving as part of the broader EN 3155 series, it ensures interoperability, reliability, and safety for aerospace electrical systems. prEN 3155-066 is applicable in conjunction with EN 3155-001 and is compatible with male contacts as specified in EN 3155-065.
Key Topics
Scope and Purpose
- Specifies essential requirements and characteristics for female, type A, crimped, class S, size 8 contacts.
- Provides guidance for use within elements of connection in accordance with EN 3155-002.
- Addresses both performance and manufacturing criteria, including materials and marking.
Contact Design and Typing
- Type A: General application.
- Class S: Operating temperature range from –65 °C to 200 °C.
- Size 8: Standardized dimensions for integration.
Materials and Surface Treatment
- Body: Copper alloy for reliable conductivity.
- Surface: Gold plating on a suitable undercoat for corrosion resistance.
Cable Compatibility
- Permissible for use with specific conductor sizes (e.g., 8 AWG and 10 AWG).
- Designed for aerospace-specific copper or copper alloy conductors.
Marking and Identification
- Marked with color code bands as per ISO 8843.
- Clear designation system enables traceability and compatibility.
Tooling Requirements
- Crimping tools adhering to MIL-DTL-22520, with industry-recognized die sets and locators.
- Insertion and extraction tools in line with MIL-I-81969 specifications.
Testing and Quality Assurance
- Series of mandatory tests for endurance, contact resistance, temperature cycling, vibration, shock, and coating quality in accordance with EN 2591 series.
Applications
Aerospace Wire Harnesses
- Used extensively in aircraft and spacecraft electrical interconnections where durability and reliability are paramount.
- Supports both signal and power circuits in avionics, navigation, and environmental control systems.
Connector Manufacturing
- Serves as a reference for manufacturers producing compliant electrical contacts for aeronautical and space applications.
- Ensures product compatibility and facilitates certification procedures.
Maintenance and Upgrades
- Simplifies selection of replacement parts due to standardization.
- Provides clear guidelines for installation, crimping, and inspection, supporting maintenance engineers and technicians.
Related Standards
- EN 3155-001: Technical specifications for electrical contacts used in aerospace connectors.
- EN 3155-002: List and utilization of contacts for aerospace applications.
- EN 3155-065: Defines associated male contacts, ensuring full system compatibility.
- EN 2083: Aerospace copper/copper alloy conductors for electrical cables.
- EN 2591 Series: Test methods for elements of electrical and optical connection, including examination, endurance, resistance, vibration, and more.
- ISO 8843: Identification system for aircraft crimp-removable contacts.
- MIL-DTL-22520: Crimping tool specifications for wire termination.
- MIL-I-81969: Installation and removal tools specifications for connector electrical contacts.
By adhering to prEN 3155-066, manufacturers and maintenance providers in aerospace gain confidence in the performance, safety, and compatibility of their interconnection components, supporting the stringent demands of modern aviation and space systems.
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
prEN 3155-066 is a draft published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Electrical contacts used in elements of connection - Part 066: Contacts, electrical, female, type A, crimp, class S, size 8 - Product standard". This standard covers: This document specifies the required characteristics, tests and tooling applicable to female electrical contacts, type A, crimp, class S, size 8, used in elements of connection in accordance with EN 3155-002. It can be used together with EN 3155-001. The associated male contacts are specified in EN 3155-065.
This document specifies the required characteristics, tests and tooling applicable to female electrical contacts, type A, crimp, class S, size 8, used in elements of connection in accordance with EN 3155-002. It can be used together with EN 3155-001. The associated male contacts are specified in EN 3155-065.
prEN 3155-066 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.
prEN 3155-066 has the following relationships with other standards: It is inter standard links to EN IEC 61400-8:2024, EN ISO/ASTM 52909:2022, EN 17533:2020, EN ISO/ASTM 52909:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN 3155-066 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-september-2026
Aeronavtika - Električni kontakti za uporabo v veznih elementih - 066. del:
Kontakti, električni, ženski, tip A, nagubani, razred S, velikost 8 - Standard za
proizvod
Aerospace series - Electrical contacts used in elements of connection - Part 066:
Contacts, electrical, female, type A, crimp, class S, size 8 - Product standard
Luft- und Raumfahrt - Elektrische Kontakte zur Verwendung in Verbindungselementen -
Teil 066: Elektrische Buchsenkontakte, Typ A, crimpbar, Klasse S, Größe 8 -
Produktnorm
Série aérospatiale - Contacts électriques utilisés dans les organes de connexion - Partie
066 : Contacts électriques, femelles, type A, à sertir, classe S, taille 8 - Norme de produit
Ta slovenski standard je istoveten z: prEN 3155-066
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
July 2026
ICS 49.060
English Version
Aerospace series - Electrical contacts used in elements of
connection - Part 066: Contacts, electrical, female, type A,
crimp, class S, size 8 - Product standard
Luft- und Raumfahrt - Elektrische Kontakte zur
Verwendung in Verbindungselementen - Teil 066:
Elektrische Buchsenkontakte, Typ A, crimpbar, Klasse
S, Größe 8 - Produktnorm
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 3155-066:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Required characteristics . 6
4.1 Specific characteristics . 6
4.2 Dimensions and mass . 6
4.3 Marking by colour code . 7
4.4 Material, surface treatment . 8
4.5 Permissible cables . 8
4.6 Tooling . 8
4.6.1 Crimping tools . 8
4.6.2 Insertion/Extraction tools . 9
4.7 Cable stripping . 9
4.8 Tests . 9
4.9 Gauges . 11
5 Designation . 11
6 Marking . 11
7 Technical specification . 11
Bibliography . 12
European foreword
This document (prEN 3155-066:2026) has been prepared 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.
Introduction
This document specifies the characteristics of female crimp contacts.
1 Scope
This document specifies the required characteristics, tests and tooling applicable to female electrical
contacts, type A, crimp, class S, size 8, used in elements of connection in accordance with EN 3155-002.
It can be used together with EN 3155-001.
The associated male contacts are specified in EN 3155-065.
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 2083, Aerospace series — Copper or copper alloy conductors for electrical cables — Product standard
EN 2591-101, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 101: Visual examination
EN 2591-102, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 102: Examination of dimensions and mass
EN 2591-202, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 202: Contact resistance at rated current
EN 2591-204, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 204: Discontinuity of contacts in the microsecond range
EN 2591-210, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 210: Electrical overload
EN 2591-301, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 301: Endurance at temperature
EN 2591-305, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 305: Rapid change of temperature
EN 2591-307, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 307: Salt mist
EN 2591-402, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 402: Shock
EN 2591-403, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 403: Sinusoidal and random vibration
EN 2591-406, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 406: Mechanical endurance
EN 2591-415, Aerospace series — Elements of electrical and optical connections — Test methods —
Part 415: Test probe damage (female contacts)
EN 2591-417, Aerospace series — E
...