FprEN 4529-003

Aerospace series - Elements of electrical and optical connection - Sealing plugs - Part 003: Class T - Product standard

This document specifies the required characteristics of sealing plugs, class T, for use in elements of electrical and optical connection containing cable (wire) sealing grommets, according to EN 4529-002. It is used together with EN 4529-001.

Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Verschluss-Stopfen - Teil 003: Klasse T - Produktnorm

Dieses Dokument legt die Anforderungen an Verschluss Stopfen der Klasse T zur Verwendung in elektrischen und optischen Verbindungselementen mit Durchführungsdichtungen nach EN 4529 002 fest. Es ist in Verbindung mit EN 4529 001 anzuwenden.

Série aérospatiale - Organes de connexion électrique et optique - Obturateurs d’étanchéité - Partie 003 : Classe T - Norme de produit

Le présent document spécifie les caractéristiques requises des obturateurs d'étanchéité, de classe T, utilisés dans les organes de connexion électrique et optique contenant des passe-fils étanches, conformément à l’EN 4529-002. Il est utilisé conjointement avec l’EN 4529-001.

Aeronavtika - Elementi električnih in optičnih povezav - Tesnilni čepi - 003. del: Razred T - Standard za proizvod

General Information

• Status: Not Published
• Publication Date: 04-Oct-2026
• ICS: 49.060 - Aerospace electric equipment and systems
• ICS: 49.090 - On-board equipment and instruments
• 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: 11-Mar-2026
• Completion Date: 11-Mar-2026
• Ref Project: oSIST prEN 4529-003:2025 - Aerospace series - Elements of electrical and optical connection - Sealing plugs - Part 003: Class T - Product standard

Relations

• Revises: EN 4529-003:2006 - Aerospace series - Elements of electrical and optical connection - Sealing plugs - Part 003: Class T - Product standard
• Effective Date: 02-Oct-2024

Overview

FprEN 4529-003:2025 is a draft European Standard developed by the European Committee for Standardization (CEN), specifically within the aerospace sector. This standard is part of the aerospace series covering elements of electrical and optical connection, focusing on sealing plugs (Class T) for use with cable (wire) sealing grommets. Applicable primarily in the aerospace industry, this product standard is to be used in conjunction with EN 4529-001 and referenced in accordance with EN 4529-002.

The standard supersedes EN 4529-003:2006, reflecting key updates such as the introduction of new size codes, and aligns with the requirements for high-performance connection technology in aerospace electrical systems.

Key Topics

• Scope and Purpose: Specifies the characteristics of Class T sealing plugs for aerospace electrical and optical connectors with cable sealing grommets.
• Temperature Range: Class T sealing plugs are rated for operation between −65 °C and 260 °C, supporting demanding thermal environments.
• Material Requirements: Sealing plugs must be manufactured from polytetrafluoroethylene (PTFE), in line with EN ISO 13000-2 Type E specifications or equivalent.
• Physical Characteristics: Includes requirements for dimensions, mass, and color codes corresponding to plug sizes, which enhance compatibility and installation accuracy.
• Testing Procedures: Details visual, dimensional, and performance tests such as insulation resistance, temperature endurance, rapid temperature changes, mold growth, fluid resistance, flammability, and hydrolytic stability.
• Designation System: Provides a standardized method for designating sealing plugs, ensuring traceability within procurement and maintenance documentation.

Applications

Sealing plugs conforming to FprEN 4529-003 are utilized in a wide range of aerospace electrical and optical connection systems where secure and reliable cable sealing is critical. Typical use cases include:

• Aircraft Wiring Harness Assemblies: Preventing ingress of fluids and contaminants in connectors and junction boxes.
• Fiber Optic Connection Sealing: Protecting optical pathways in avionic systems from environmental hazards.
• Maintenance and Repair Operations: Standardized sealing plugs support consistency in replacement, reducing errors and downtime.
• High-Reliability Environments: Suitable for applications requiring stable performance across a broad temperature range and under exposure to vibration, humidity, and aggressive fluids.

Related Standards

For comprehensive compliance and effective implementation in aerospace applications, the following related standards should be considered:

• EN 4529-001: Technical specification for sealing plugs.
• EN 4529-002: Index of product standards for sealing plugs.
• EN 2591 Series: Test methods for aerospace electrical and optical connections (including visual inspection, dimensional testing, insulation resistance, temperature endurance, rapid temperature change, mold growth, fluid resistance, flammability, and hydrolytic stability).
• EN ISO 13000-2: Requirements for PTFE material used in plug manufacturing.
• EN 2997-001 / EN 3155-001: General specifications for aerospace connectors and contacts.

By adhering to FprEN 4529-003 and its referenced standards, aerospace manufacturers and suppliers ensure that sealing plugs meet stringent reliability, safety, and compatibility requirements essential for critical electrical and optical connection systems.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2025
Aeronavtika - Elementi električnih in optičnih povezav - Tesnilni čepi - 003. del:
Razred T - Standard za proizvod
Aerospace series - Elements of electrical and optical connection - Sealing plugs - Part
003: Class T - Product standard
Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Verschluss-
Stopfen - Teil 003: Klasse T - Produktnorm
Série aérospatiale - Organes de connexion électrique et optique - Obturateurs
d’étanchéité - Partie 003 : Classe T - Norme de produit
Ta slovenski standard je istoveten z: prEN 4529-003
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
prEN 4529-003
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2025
ICS 49.060 Will supersede EN 4529-003:2006
English Version
Aerospace series - Elements of electrical and optical
connection - Sealing plugs - Part 003: Class T - Product
standard
Série aérospatiale - Organes de connexion électrique et Luft- und Raumfahrt - Elektrische und optische
optique - Obturateurs d'étanchéité - Partie 003 : Classe Verbindungselemente - Verschluss-Stopfen - Teil 003:
T - Norme de produit Klasse T - 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4529-003:2025 E
worldwide for CEN national Members.

prEN 4529-003:2025 (E)
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 – Mass, colours . 6
4.3 Material . 6
4.4 Dimensions and mass . 6
4.5 Tests . 9
5 Designation . 9
6 Marking . 10
7 Technical specification . 10
Annex A (informative) Standard evolution form . 11
Bibliography . 12

prEN 4529-003:2025 (E)
European foreword
This document (prEN 4529-003:2025) 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 4529-003:2006.
This document includes the following significant technical changes with respect to EN 4529-003:2006:
— Introduction of sealing plugs size code 10.
— The main changes between this edition and the previous edition are listed in Table A.1.
prEN 4529-003:2025 (E)
Introduction
The sealing plug specified in this document is derived from MS27488.
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