SIST EN 2349-405:2009

• Abstract:

  This standard specifies a method for checking the capability of relays and contactors to withstand fluids. It shall be used together with EN 2349-100.This standard specifies a method for checking the capability of relays and contactors to withstand fluids. It shall be used together with EN 2349-100.

• Status: Published
• Publication Date: 31-Mar-2009
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Mar-2009
• Due Date: 25-May-2009
• Completion Date: 01-Apr-2009
• Ref Project: EN 2349-405:2006 - Aerospace series - Requirements and test procedures for relays and contactors - Part 405: Fluid resistance

• Refers: SIST EN 2349-201:2009 - Aerospace series - Requirements and test procedures for relays and contactors - Part 201: Visual inspection
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2591-315:2016 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 315: Fluid resistance
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3909:2016 - Aerospace series - Test fluids for electrical and optical components and sub-assemblies
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2593-001:2015 - Aerospace series - Bases for 10 A electromagnetic plug-in relays, two and four poles double thrown - Part 001: Technical specification
• Effective Date: 28-Jan-2026

SIST EN 2349-405:2009 is the Slovenian adoption of EN 2349-405:2006 for aerospace relays and contactors. It specifies a test method for checking whether these devices can withstand fluids, and it is used together with EN 2349-100. In practice, it is a procedure standard for manufacturers, test laboratories, and quality teams working on aerospace electrical switching equipment.

What does SIST EN 2349-405:2009 specify?

SIST EN 2349-405:2009 specifies a method for checking the capability of relays and contactors to withstand fluids. The standard is part of the aerospace series for relays and contactors, and its own scope says it shall be used together with EN 2349-100.

The document is organized into four main clauses:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Method
• Clause 4 - Requirements

This structure matters in practice because the standard gives only the fluid resistance test and the acceptance check, while the general product framework comes from the companion standards.

What are the key requirements of SIST EN 2349-405:2009?

SIST EN 2349-405:2009 gives a simple test sequence: prepare the relay or contactor, expose it according to the specified fluid resistance method, and then inspect the result. The main pass/fail point is the condition of the device after the test.

Mounting and wiring

The relay or contactor shall be wired in accordance with the product standard. For relays with a plug-socket holder, any contact positions that are not wired shall be fitted with blanking plugs.

In practice, this means the test article must be prepared in the same configuration expected for the product, so the result reflects real use rather than a special lab setup.

Test procedure

The test shall be carried out in accordance with EN 2591-315. The maximum temperature limit is taken from the product standard.

For users, this means the detailed immersion or exposure conditions are not created from scratch here - the test lab follows the referenced method and then checks any temperature limit given for the specific product.

Post-test examination

After testing, the relay or contactor shall be inspected in accordance with EN 2349-201.

This is the practical acceptance check: the device is examined visually after fluid exposure, so any surface damage can be detected and recorded.

Acceptance condition

There shall be no signs of attack or corrosion.

In practice, the device must come out of the fluid test without visible degradation of the material surfaces or protective finishes.

Relationship to the general series

The scope says SIST EN 2349-405:2009 shall be used together with EN 2349-100.

This means the fluid resistance test is not a standalone product specification. Users need the general requirements in EN 2349-100 to apply the test correctly.

What terms does SIST EN 2349-405:2009 use?

• Relay - an aerospace switching device covered by the series, tested here for resistance to fluids.
• Contactor - a switching device in the same product family as relays, also subject to the fluid resistance test.
• Fluid resistance - the ability of the device to withstand contact with fluids without damage that matters to serviceability.
• Product standard - the document that sets the wiring arrangement and the maximum temperature limit for the specific relay or contactor.
• Blanking plugs - plugs used to close unused contact positions on relays with a plug-socket holder during test preparation.
• Attack - visible harmful effect on the device after fluid exposure.
• Corrosion - material deterioration caused by the fluid test conditions.

Who uses SIST EN 2349-405:2009?

SIST EN 2349-405:2009 is used by aerospace manufacturers of relays and contactors, test laboratories, and quality assurance teams. It is also relevant to buyers and technical evaluators who need evidence that a relay or contactor has been checked for fluid resistance.

In practice, users apply it when they need to:

• prepare test samples correctly
• run a standardized fluid resistance test
• inspect the part after exposure
• document whether the part shows attack or corrosion

What changed in SIST EN 2349-405:2009 from the previous edition?

SIST EN 2349-405:2009 is the Slovenian standard identical to EN 2349-405:2006. The available text does not state technical changes from an earlier edition.

Which standards are used with SIST EN 2349-405:2009?

• EN 2349-100 - gives the general requirements for the relays and contactors series and is required for applying this part.
• EN 2349-201 - provides the visual inspection used after the fluid resistance test.
• EN 2591-315 - gives the fluid resistance test method that Clause 3 uses.

What does the SIST EN 2349-405:2009 document contain?

SIST EN 2349-405:2009 is a short procedural standard. It contains the scope, the referenced standards, the mounting instructions, the test procedure, and the acceptance requirement that there be no signs of attack or corrosion.

It tells the user how to prepare a relay or contactor for the test, including how to treat unused contact positions on a plug-socket holder. It also points the user to the companion standards for the general product rules, the detailed fluid resistance method, and the visual inspection step.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Anforderungen und Prüfverfahren für Relais und Schaltschütze - Teil 405: Beständigkeit gegen FlüssigkeitenSérie aérospatiale - Exigences et méthodes d'essais des relais et contacteurs - Partie 405 : Résistance aux fluidesAerospace series - Requirements and test procedures for relays and contactors - Part 405: Fluid resistance49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2349-405:2006SIST EN 2349-405:2009en,de01-maj-2009SIST EN 2349-405:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2349-405October 2006ICS 49.060 English VersionAerospace series - Requirements and test procedures for relaysand contactors - Part 405: Fluid resistanceSérie aérospatiale - Exigences et méthodes d'essais desrelais et contacteurs - Partie 405 : Résistance aux fluidesLuft- und Raumfahrt - Anforderungen und Prüfverfahren fürRelais und Schaltschütze - Teil 405: Beständigkeit gegenFlüssigkeitenThis European Standard was approved by CEN on 19 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2349-405:2006: ESIST EN 2349-405:2009
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