EN 2495:1990
(Main)Aerospace series - Single-pole circuit breakers temperature compensated rated currents up to 25 A - Product standard
Aerospace series - Single-pole circuit breakers temperature compensated rated currents up to 25 A - Product standard
This standard specifies the required characteristics for single-pole temperaturecompensated circuit breakers of current ratings from(0,5 to 25)A. These circuit breakers are operated by a single push-pull button with trip-free release, delayed tripping and are explosion proof. Their operation is ensured up to shortcircuit current.
Luft- und Raumfahrt - Temperaturkompensierte einpolige Schutzschalter - Nennströme bis 25 A - Produktnorm
Die vorliegende Norm legt die Anforderungen an temperaturkompensierte, einpolige Schutzschalter mit Nennströmen von (0,5 bis 25) A fest. Diese Schutzschalter sind mit Druck-Zug-Betätigung durch Druckknopf, mit Freiauslösung, verzögerter Auslösefunktion und explosionsdicht. Sie sind kurzschlusssicher und ihr Temperaturbereich liegt zwischen -55°C und 125°C, bei einer Betriebshöhe bis Z = 22000 m max. Diese Norm ist in Verbindung mit EN 2350 anzuwenden.
Série aérospatiale - Disjoncteurs unipolaires compensés en température d'intensité nominale jusqu'à 25 A - Norme de produit
La présente norme spécifie les caractéristiques requises des disjoncteurs unipolaires compensés en température, d'intensité nominale(0,5 à 25)A. Ces disjoncteurs sont à commande par bouton poussoir unique à déclenchement libre, temporisés, anti-déflagrants. Leur fonctionnement est assuré jusqu'au courant de court-circuit
Aerospace series - Single-pole circuit breakers temperature compensated rated currents up to 25 A - Product standard
General Information
- Status
- Published
- Publication Date
- 04-Sep-1990
- Withdrawal Date
- 04-Mar-1991
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2 - Electrical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 05-Sep-1990
- Completion Date
- 05-Sep-1990
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 2495:1990 is a CEN aerospace product standard that defines the required characteristics for single-pole temperature‑compensated circuit breakers with rated currents from 0.5 A to 25 A. Intended for aerospace electric equipment and systems, the standard covers design and performance features for circuit breakers that use a single push‑pull actuator, provide trip‑free release, include delayed tripping, are rated as explosion‑proof, and are required to operate up to short‑circuit current conditions. The document was originally published as EN 2495:1990 and later adopted nationally (e.g., SIST EN 2495:2001).
Key Topics and Requirements
- Rated current range: Specification covers circuit breakers with rated currents from 0.5 A to 25 A.
- Single‑pole design: Focus on single-pole circuit breaker construction suitable for aerospace installations.
- Temperature compensation: Performance parameters and characteristics that ensure reliable operation across specified temperature ranges.
- Actuation and release: Use of a single push‑pull button with trip‑free release to prevent mechanical restraint during fault clearing.
- Time characteristics: Inclusion of delayed tripping behaviour for inrush tolerance and coordination.
- Short‑circuit capability: Operation is specified up to short‑circuit current levels to ensure protective function under fault conditions.
- Explosion‑proof construction: Requirements for safe use in potentially explosive atmospheres encountered in certain aerospace environments.
- Product standard scope: Defines essential performance and safety attributes rather than detailed installation practice.
Applications
EN 2495 is applicable wherever compact, reliable overcurrent protection is required in aircraft and aerospace systems:
- Protection of avionics circuits, instrumentation and control systems
- Circuit protection in environmental control, lighting, and power distribution panels
- Use in aerospace component manufacturing and design where certified, temperature-compensated breakers are required
- Situations demanding explosion‑proof protection (specific environmental or fuel-system locations)
Who Uses This Standard
- Aerospace manufacturers and OEMs specifying component requirements
- Avionics and electrical systems engineers designing aircraft power and protection schemes
- Component suppliers and circuit breaker manufacturers developing to EN 2495 product criteria
- Maintenance, certification, and procurement teams seeking compliance with European aerospace product standards
Related Standards
EN 2495 sits within the broader body of aerospace electrical equipment standards. Users should consult other relevant aerospace electrical and safety standards (national adoptions and CEN/EN series) for installation, testing, and system‑level requirements.
Keywords: EN 2495, aerospace circuit breakers, temperature compensated circuit breakers, single‑pole circuit breakers, rated currents up to 25 A, CEN product standard, trip‑free release, explosion proof.
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National Aerospace and Defense Contractors Accreditation Program (NADCAP)
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NSF-ISR
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Frequently Asked Questions
EN 2495:1990 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Single-pole circuit breakers temperature compensated rated currents up to 25 A - Product standard". This standard covers: This standard specifies the required characteristics for single-pole temperaturecompensated circuit breakers of current ratings from(0,5 to 25)A. These circuit breakers are operated by a single push-pull button with trip-free release, delayed tripping and are explosion proof. Their operation is ensured up to shortcircuit current.
This standard specifies the required characteristics for single-pole temperaturecompensated circuit breakers of current ratings from(0,5 to 25)A. These circuit breakers are operated by a single push-pull button with trip-free release, delayed tripping and are explosion proof. Their operation is ensured up to shortcircuit current.
EN 2495:1990 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.
EN 2495:1990 has the following relationships with other standards: It is inter standard links to EN ISO 9680:2014, EN ISO 6875:2011, EN ISO 7494-1:2011, EN ISO 14457:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 2495:1990 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.Aerospace series - Single-pole circuit breakers temperature compensated rated currents up to 25 A - Product standardLuft- und Raumfahrt - Temperaturkompensierte einpolige Schutzschalter - Nennströme bis 25 A - ProduktnormSérie aérospatiale - Disjoncteurs unipolaires compensés en température d'intensité nominale jusqu'a 25 A - Norme de produitAerospace series - S
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