SIST EN 2995-004:2009
(Main)Aerospace series - Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A - Part 004: With signal contact - Product standard
Aerospace series - Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A - Part 004: With signal contact - Product standard
This standard specifies the characteristics of single-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between – 55 °C and 125 °C and at an altitude of 22 000 m max.
These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping with a signal contact which is open when main contacts are closed, and inversely.
They will continue to function up to the short-circuit current.
Luft- und Raumfahrt - Schutzschalter, einpolig, Temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 004: Mit Signalkontakt - Produktnorm
Diese Norm legt die Eigenschaften von einpoligen, temperaturkompensierten Schutzschaltern mit Nennströmen von 1 A bis 25 A fest, die in Luftfahrzeug Bordnetzen im Temperaturbereich zwischen –55 °C und 125 °C und bei einer maximalen Höhenlage von 22 000 m verwendet werden.
Diese Schutzschalter besitzen einen Druckknopf (Betätigungsknopf) mit Druck Zug Betätigung mit Freiaus¬lösung und verzögerter Auslösefunktion und einen Signalkontakt, der bei geschlossenen Hauptkontakten geöffnet ist und umgekehrt.
Ihre Funktion ist bis zum Kurzschlussstrom sichergestellt.
Série aérospatiale - Disjoncteurs unipolaires compensés en température, intensités nominales 1 A à 25 A - Partie 004 : Avec contact de signalisation - Norme de produit
Aeronavtika - Odklopniki, enopolni, temperaturno kompenzirani, nazivni tok od 1 A do 25 A - 004. del: S signalnim kontaktom - Standard za proizvod
General Information
- Status
- Published
- Publication Date
- 19-Apr-2009
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 07-Apr-2009
- Due Date
- 12-Jun-2009
- Completion Date
- 20-Apr-2009
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
SIST EN 2995-004:2009 is a European standard that specifies requirements for single-pole, temperature compensated circuit breakers with rated currents from 1 A to 25 A, specifically designed for aerospace applications. These circuit breakers are intended for use in aircraft on-board electrical circuits, operating in harsh environments with temperatures ranging from –55 °C to 125 °C and altitudes up to 22,000 meters. A distinguishing feature of these circuit breakers is the inclusion of a signal contact that monitors the status of the primary contacts, enhancing circuit monitoring and safety in demanding aerospace environments.
Key Topics
- Single-pole, temperature compensated design: Provides consistent circuit protection across a broad temperature range, maintaining reliability at extreme altitudes and temperatures common in aerospace applications.
- Push-pull actuator with trip-free mechanism: The manual actuator features a delayed action "trip-free" design, ensuring the breaker can trip independently of actuator manipulation, even under overload conditions.
- Signal contact integration: Signal contact is open when the main contacts are closed, and vice versa, facilitating advanced circuit status monitoring.
- Voltage ratings: Supports typical aerospace voltages, including 28 V DC and up to 115 V AC (360 Hz to 800 Hz), suitable for a wide range of aircraft electrical systems.
- Mechanical and environmental endurance: Designed for high resistance to vibration (up to 10 gn), shock (up to 50 gn), humidity, corrosion, and exposure to contaminating liquids, as referenced in associated standards.
- Standardized mounting and marking: Ensures ease of installation, identification, and compatibility with common aerospace hardware and marking protocols.
Applications
SIST EN 2995-004:2009 circuit breakers are crucial components in the following aerospace and high-reliability fields:
- Aircraft electrical systems: Used in critical on-board circuits where robust, reliable circuit protection is essential for safety and equipment longevity.
- Avionics and control panels: Trusted in control and instrumentation systems requiring signal feedback for main and auxiliary circuit status.
- Environmental extremes: Suitable for platforms exposed to severe cold, heat, and reduced atmospheric pressure, such as commercial jets, military aircraft, and specialized aerospace vehicles.
- Maintenance and diagnostics: The integrated signal contact enables efficient system monitoring and troubleshooting, simplifying fault detection and maintenance operations.
- Standardized fleets: Ensures interoperability and consistent performance in multinational fleets and collaborative aerospace programs through standardized dimensions, ratings, and performance criteria.
Related Standards
For broader compatibility and compliance, the following related aerospace standards should be referenced alongside SIST EN 2995-004:2009:
- EN 2995-001: General technical specifications for single-pole, temperature compensated circuit breakers (foundation document for series).
- EN 3155-016: Electrical contacts used in aerospace connectors, specifying pin configurations relevant to circuit breaker installations.
- EN 6113: Connecting and attachment hardware for aerospace circuit breakers, ensuring standardized fasteners and mounting solutions.
- TR 6083: Installation requirements for electrical components in aerospace contexts.
- MIL-I-81969/1A & MIL-I-81969/14C: Tools for installing and removing electrical contacts in aerospace connector assemblies.
- FED-STD-595B: Color standards for marking and procurement in aerospace applications.
By adhering to SIST EN 2995-004:2009, aerospace engineers, manufacturers, and maintenance providers ensure high levels of safety, reliability, and consistency in circuit protection within the rigorous operational environment of modern aircraft. This standard supports compliance, reduces risk, and facilitates seamless equipment integration across global aerospace systems.
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Frequently Asked Questions
SIST EN 2995-004:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A - Part 004: With signal contact - Product standard". This standard covers: This standard specifies the characteristics of single-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between – 55 °C and 125 °C and at an altitude of 22 000 m max. These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping with a signal contact which is open when main contacts are closed, and inversely. They will continue to function up to the short-circuit current.
This standard specifies the characteristics of single-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits at a temperature between – 55 °C and 125 °C and at an altitude of 22 000 m max. These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping with a signal contact which is open when main contacts are closed, and inversely. They will continue to function up to the short-circuit current.
SIST EN 2995-004:2009 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.
SIST EN 2995-004:2009 has the following relationships with other standards: It is inter standard links to SIST EN 3155-016:2025, SIST EN 2995-001:2024, SIST EN 4728:2015, SIST EN 3155-002:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 2995-004:2009 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)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Odklopniki, enopolni, temperaturno kompenzirani, nazivni tok od 1 A do 25 A - 004. del: S signalnim kontaktom - Standard za proizvodLuft- und Raumfahrt - Schutzschalter, einpolig, Temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 004: Mit Signalkontakt - ProduktnormSérie aérospatiale - Disjoncteurs unipolaires compensés en température, intensités nominales 1 A à 25 A - Partie 004 : Avec contact de signalisation - Norme de produitAerospace series - Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A - Part 004: With signal contact - Product standard49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2995-004:2006SIST EN 2995-004:2009en,de01-junij-2009SIST EN 2995-004:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2995-004August 2006ICS 49.060 English VersionAerospace series - Circuit breakers, single-pole, temperaturecompensated, rated current 1 A to 25 A - Part 004: With signalcontact - Product standardSérie aérospatiale - Disjoncteurs unipolaires compensés entempérature, intensités nominales 1 A à 25 A - Partie 004 :Avec contact de signalisation - Norme de produitLuft- und Raumfahrt - Schutzschalter, einpolig,Temperaturkompensiert, Nennströme von 1 A bis 25 A -Teil 004: Mit Signalkontakt - ProduktnormThis European Standard was approved by CEN on 5 June 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 2995-004:2006: ESIST EN 2995-004:2009
Aerospace series – Circuit breakers, single-pole, temperature compensated, rated current 1 A to 25 A – Part 001: Technical specification.
EN 3155-016,
Aerospace series – Electrical contacts used in elements of connection – Part 016: Contacts, electrical, male, type A, crimp, class S – Product standard.
EN 6113,
Aerospace series – Circuit breaker, connecting and attachment hardware. 1) TR 6083,
Aerospace series – Cut-outs for installation of electrical components. 2) MIL-I-81969/1A,
Installing and removal tools, connector electrical contact, type III, class 2, composition C. 3) MIL-I-81969/14C,
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