FprEN 3545-003

Aerospace series - Connectors, electrical, rectangular, with sealed and non-sealed rear, plastic housing, locking device, operating temperatures -55 °C to 175 °C - Part 003: Connectors with female contacts - Product standard

This document specifies connectors with female contacts in the family of rectangular electrical connectors with sealed and non-sealed rear, plastic housing, locking device, for operating temperatures from −55 °C to 175 °C.
These connectors may be used as receptacles (fixed housings) or plugs (free housings) in conjunction with the following coding and attachment system:
-   male coding and attachment system for mounting on a fixed housing;
-   female coding and attachment system for mounting on a free housing.

Luft- und Raumfahrt - Elektrische Rechtecksteckverbinder mit und ohne hintere Abdichtung, Plastikgehäuse, Verriegelungssystem, Betriebstemperaturen von -55 °C bis 175 °C - Teil 003: Steckverbinder mit Buchsenkontakten - Produktnorm

Série aérospatiale - Connecteurs électriques, rectangulaires, étanches et non étanches à l’arrière, à boîtier en plastique, à verrouillage, températures d’utilisation -55 °C à 175 °C - Partie 003 : Connecteurs à contacts femelles - Norme de produit

Aeronavtika - Konektorji, električni, pravokotni, s tesnilno kapo ali brez nje, plastičnim ohišjem, zapornim mehanizmom, z delovno temperaturo med –55 °C in 175 °C - 003. del: Konektorji z ženskim kontaktom - Standard za proizvod

General Information

• Status: Not Published
• Publication Date: 29-Nov-2026
• 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: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 24-Apr-2026
• Completion Date: 24-Apr-2026
• Ref Project: oSIST prEN 3545-003:2025 - Aerospace series - Connectors, electrical, rectangular, with sealed and non-sealed rear, plastic housing, locking device, operating temperatures -55 °C to 175 °C - Part 003: Connectors with female contacts - Product standard

Relations

• Revises: EN 3545-003:2005 - Aerospace series - Connectors, electrical, rectangular, with sealed and non-sealed rear, plastic housing, locking device, operating temperatures - 55 °C to 175 °C - Part 003: Connectors with female contacts - Product standard
• Effective Date: 19-Jun-2024

Overview

FprEN 3545-003 is a draft European Standard developed by CEN for the aerospace sector. It specifies the requirements for rectangular electrical connectors with female contacts, featuring sealed or non-sealed rear ends, plastic housings, and a locking device. Designed for robust performance, these connectors are suitable for operating temperature ranges from -55 °C to 175 °C, crucial for demanding aerospace environments. The standard bolts directly into modern aerospace systems, ensuring electrical integrity and reliable locking even in challenging conditions.

Key Topics

• Connector Types: Details the construction of rectangular electrical connectors with female contacts, addressing both sealed (with grommets) and non-sealed rear options.
• Housing Materials: Focuses on lightweight plastic housings ideal for aerospace mass and durability requirements.
• Locking Device: Specifies integrated locking mechanisms to secure connections and prevent unintended disconnection.
• Contact Arrangements: Covers multiple contact arragements per EN 3545-002, enabling flexible electrical design.
• Coding and Attachment Systems: Supports both male and female coding systems for mounting on fixed or free housings, helping prevent mismating.
• Temperature Performance: Assures operability in harsh environments with an extended range from -55 °C up to 175 °C.
• Designation System: Introduces clear and consistent part identification, including options for plating (cadmium or zinc-nickel), sealing, contact type, and delivery conditions.
• Marking Requirements: Defines required labeling, including date of manufacture and manufacturer information for traceability.

Applications

The connectors covered by FprEN 3545-003 are widely used in aerospace electrical equipment and systems, offering:

• Receptacle and Plug Functions: Suitable for both fixed (receptacle) and free (plug) housing configurations, ensuring compatibility with diverse aircraft and spacecraft installations.
• Enhanced Environmental Sealing: The optional sealed rear design prevents ingress of dust and fluids, supporting usage in pressurized and non-pressurized zones.
• Easy Maintenance and Replacement: Standardized dimensions and marking facilitate quick identification and interchangeability, reducing downtime and supporting streamlined logistics.
• Flexible Integration: Support for various contact arrangements and coding systems allows customization to specific system architectures and safety interlocks.
• Reliable Performance: The standard ensures robust electrical connections throughout extended temperature cycles commonly encountered in aerospace missions, ensuring safety and mission assurance.

Related Standards

FprEN 3545-003 is part of the EN 3545 series and references several related standards:

• EN 2591-100: Test methods for electrical and optical connectors, covering general quality and reliability requirements in aerospace applications.
• EN 3545-001: Technical specification for the connector series, detailing common requirements and criteria for the entire family.
• EN 3545-002: Specifications for contact arrangements and connector performance within the series.
• EN 3155-003 & EN 3155-015: Product standards for electrical female contacts, ensuring connector compatibility and performance.
• EN 3155-002: Listing and application of contacts within aerospace connectors.

Practical Value

Implementing FprEN 3545-003 ensures compliance with internationally recognized standards for aerospace electrical connectors, maximizing system compatibility, safety, and reliability. The standard streamlines procurement, maintenance, and quality assurance, offering benefits to OEMs, suppliers, and operators engaged in aircraft and spacecraft manufacture, maintenance, and upgrade projects.

By referencing this standard, stakeholders in the aerospace industry can achieve greater efficiency, minimized operational risks, and long-term cost savings through the use of proven electrical interconnect solutions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2025
Aeronavtika - Konektorji, električni, pravokotni, s tesnilno kapo ali brez nje,
plastičnim ohišjem, zapornim mehanizmom, z delovno temperaturo med –55 °C in
175 °C - 003. del: Konektorji z ženskim kontaktom - Standard za proizvod
Aerospace series - Connectors, electrical, rectangular, with sealed and non-sealed rear,
plastic housing, locking device, operating temperatures -55 °C to 175 °C - Part 003:
Connectors with female contacts - Product standard
Luft- und Raumfahrt - Elektrische Rechtecksteckverbinder mit und ohne hintere
Abdichtung, Plastikgehäuse, Verriegelungssystem, Betriebstemperaturen von -55 °C bis
175 °C - Teil 003: Steckverbinder mit Buchsenkontakten - Produktnorm
Série aérospatiale - Connecteurs électriques, rectangulaires, étanches et non étanches
à l’arrière, à boîtier en plastique, à verrouillage, températures d’utilisation -55 °C à 175
°C - Partie 003 : Connecteurs à contacts femelles - Norme de produit
Ta slovenski standard je istoveten z: prEN 3545-003
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
prEN 3545-003
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2024
ICS 49.060 Will supersede EN 3545-003:2005
English Version
Aerospace series - Connectors, electrical, rectangular, with
sealed and non-sealed rear, plastic housing, locking device,
operating temperatures -55 °C to 175 °C - Part 003:
Connectors with female contacts - Product standard
Série aérospatiale - Connecteurs électriques, Luft- und Raumfahrt - Elektrische
rectangulaires, étanches et non étanches à l'arrière, à Rechtecksteckverbinder mit und ohne hintere
boîtier en plastique, à verrouillage, températures Abdichtung, Plastikgehäuse, Verriegelungssystem,
d'utilisation -55 °C à 175 °C - Partie 003 : Connecteurs Betriebstemperaturen von -55 °C bis 175 °C - Teil 003:
à contacts femelles - Norme de produit Steckverbinder mit Buchsenkontakten - 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3545-003:2024 E
worldwide for CEN national Members.

prEN 3545-003:2024 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Dimensions, mass . 4
4.2 Recommended panel cut-out for connectors fitted with male coding and attachment
system . 7
4.3 Main general characteristics . 7
5 Designation . 8
6 Delivery conditions . 9
7 Marking . 9
8 Technical specification . 9
Bibliography . 10

prEN 3545-003:2024 (E)
European foreword
This document (prEN 3545-003:2024) 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 3545-003:2005.
This document includes the following significant technical changes with respect to EN 3545-003:2005:
— Clause 5 Designation: differentiation between cadmium plated and zinc-nickel plated connectors and
introduction of corresponding coding;
— ed
...