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
- 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
- 22-Nov-2027
- Technical Committee
- ASD-STAN - Aerospace
- Current Stage
- 4060 - Closure of enquiry - Enquiry
- Start Date
- 24-Sep-2026
- Completion Date
- 24-Sep-2026
prEN 3155-066 is a CEN draft European Standard in the Aerospace series for female electrical contacts, type A, crimp, class S, size 8. It specifies the required characteristics, tests and tooling for these contacts when used in elements of connection in accordance with EN 3155-002. The document is meant for manufacturers, test laboratories and users of these contacts, and it is used together with EN 3155-001; the associated male contacts are covered by EN 3155-065.
What does prEN 3155-066 specify?
prEN 3155-066 covers one product type: female electrical contacts, type A, crimp, class S, size 8. Its scope links the contacts to the EN 3155 family of elements of connection, so the standard is about a specific contact design rather than a whole connector system.
The document is organized into seven clauses plus a bibliography:
| Clause | Subject |
|---|---|
| 1 | Scope |
| 2 | Normative references |
| 3 | Terms and definitions |
| 4 | Required characteristics |
| 5 | Designation |
| 6 | Marking |
| 7 | Technical specification |
Clause 4 is the core of the document. It groups the design data, cable compatibility, tooling, preparation, test methods and gauges that are needed to make, inspect and qualify the contacts.
What are the key requirements of prEN 3155-066?
prEN 3155-066 sets out the product definition, the allowed cable interfaces, the tooling to be used and the verification tests. In practice, this is the information a manufacturer or buyer needs to check whether a contact can be made, crimped, installed and qualified for aerospace use.
Product characteristics and dimensions
Clause 4.1 states that type A contacts are for general application and that class S covers an operating temperature range from -65 °C to 200 °C. Clause 4.2 ties the dimensions and mass to Figure 1 and Table 1, with dimensions given after surface treatment. That matters because fit, mating and interchangeability depend on the finished contact dimensions.
Identification and materials
Clause 4.3 requires colour-code marking using two bands in accordance with ISO 8843. Clause 4.4 specifies a copper alloy body with gold on an appropriate undercoat. In practice, the colour bands help identify the size/version quickly, while the material and plating define the contact interface expected in service.
Cable, stripping and tooling
Clause 4.5 lists the permissible cables for each contact/barrel combination. Clause 4.6 requires crimping tools to conform to MIL-DTL-22520 and insertion/extraction tools to conform to MIL-I-81969, with the detailed tool selections given in Tables 4 and 5. Clause 4.7 gives the stripping length for the cable before crimping. This is the part of the standard that drives shop-floor setup: the wrong cable, tool or strip length can affect crimp quality and retention.
Verification tests
Clause 4.8 gives the required test programme by reference to EN 2591 methods. It includes visual examination, dimensions and mass, contact resistance, discontinuity, electrical overload, temperature endurance, rapid temperature change, salt mist, shock, vibration, mechanical endurance, probe damage, crimped-connection tensile strength, gauge insertion/extraction forces, coating thickness, coating adhesion and magnetic permeability. Several tests also include conditions or limits, such as endurance at 200 °C, temperature cycling between 200 °C and -65 °C, tensile strength values for the two sizes, recorded coating thickness and magnetic permeability at or below 2. This is the qualification and inspection backbone of the standard.
Designation, marking and gauges
Clause 5 explains the designation code, including contact type, contact size, barrel size and delivery code, with delivery options linked to sealing sleeves in EN 4530-004. Clause 6 requires marking in accordance with EN 3155-001, and clause 7 sends technical specification requirements to EN 3155-001. Clause 4.9 also points users to EN 3155-001 for gauges.
What terms does prEN 3155-066 define?
- Type A - The contact style covered by this standard; here it is the general-application female contact.
- Class S - The contact class associated with the operating temperature range from -65 °C to 200 °C.
- Crimp - The contact is joined to the conductor by crimping rather than soldering.
- Barrel size - The size code for the wire-crimping part of the contact, used in designation and tool selection.
- American Wire Gauge (AWG) - A wire-size system used in the tables to identify the closest conductor size.
- Delivery code - The part of the designation that states whether a sealing sleeve is supplied and which EN 4530-004 sleeve applies.
- Sealing sleeve - An optional sleeve supplied with the contact under the delivery codes in clause 5.
Who uses prEN 3155-066?
prEN 3155-066 is used by aerospace contact manufacturers, cable harness makers, inspection laboratories, quality teams and procurement staff. They use it to choose compatible conductors, set up crimping and insertion/extraction tooling, prepare stripped wires, verify finished contacts and write product designations for ordering and traceability.
Which standards are used with prEN 3155-066?
| Standard | What it contributes |
|---|---|
| EN 3155-001 | Technical specification, terms, marking and gauges for the EN 3155 contact family |
| EN 3155-002 | List and utilization of contacts |
| EN 3155-065 | Associated male contacts |
| EN 2083 | Copper or copper alloy conductors for electrical cables |
| EN 2591 series | Test methods used for visual, dimensional, electrical, environmental, mechanical and coating verification |
| ISO 8843 | Identification system used for the colour-code marking |
| MIL-DTL-22520 | Crimping tools |
| MIL-I-81969 | Insertion/extraction tools |
| EN 4530-004 | Sealing sleeves referenced by the delivery code |
What does the prEN 3155-066 document contain?
prEN 3155-066 contains a dimensional figure, tables for dimensions and mass, colour-code marking, permissible cable sizes, tool selections, stripping lengths and a test matrix. It also contains a designation example showing how contact type, size, barrel size and delivery code are combined. The document is structured so users can move from identification to manufacture, then to verification and marking without needing to assemble the information from separate sources.
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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
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
...