EN 2794-003:1999
(Main)Aerospace series - Circuit breakers, single-pole, temperature compensated, rated currents 20 A to 50 A - Part 003: Metric thread terminals - Product standard
General Information
- Abstract
This standard specifies the required characteristics for single-pole, temperature compensated circuit breakers, rated currents from 20 A to 50 A, metric thread terminals, for use in aircraft electrical systems, at temperatures between - 55°C and 125°C and at a maximum altitude of Z = 15 000 m. It shall be used together with EN 2794-001. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.
- Status
- Published
- Publication Date
- 22-Jun-1999
- Withdrawal Date
- 30-Dec-1999
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 2 - Electrical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 17-Sep-2026
Overview
EN 2794-003:1999 (CEN) is a product standard in the aerospace series that defines the required characteristics for single‑pole, temperature‑compensated circuit breakers with rated currents from 20 A to 50 A and metric thread terminals. It applies to circuit breakers intended for use in aircraft electrical systems operating between −55 °C and 125 °C and at a maximum altitude of 15 000 m. EN 2794-003 is intended to be used together with EN 2794-001 and for systems compliant with EN 2282 electrical supply requirements.
Key topics and requirements
- Scope and applicability: Single‑pole, temperature‑compensated circuit breakers, rated 20 A–50 A, with metric thread terminals for aerospace use.
- Environmental limits: Defined operating temperature range (−55 °C to 125 °C) and maximum service altitude (15 000 m).
- Terminal specification: Requirement for metric thread terminals to ensure compatibility with metric fastenings and aircraft electrical hardware.
- Product characteristics: Specifies the essential characteristics that manufacturers and designers must meet for aerospace use (electrical performance, temperature compensation behavior, terminal compatibility and environmental suitability).
- Integration: Must be used in conjunction with EN 2794-001 (general requirements) and is intended for aircraft following EN 2282 electrical supply standards.
- Classification: Falls under ICS 49.060 - aerospace electric equipment and systems.
Practical applications
- Aircraft electrical system design: selecting compliant circuit protection components for power distribution and subsystem protection.
- Component manufacturing: defining product features, marking, and compatibility for circuit breaker production with metric thread terminals.
- Procurement and supply chain: specifying EN 2794-003 compliance in purchase documents for aircraft components and spares.
- Maintenance, repair and overhaul (MRO): ensuring replacement circuit breakers meet the environmental and electrical requirements for certified aircraft.
- Certification and airworthiness: supporting compliance evidence for avionics and electrical installations in aircraft.
Who uses this standard
- Avionics and aerospace electrical engineers
- Aircraft component manufacturers and suppliers
- Procurement managers and quality assurance teams in aerospace
- Maintenance, repair, and overhaul organizations (MRO)
- Certification bodies and regulatory engineers
Related standards
- EN 2794-001 - General requirements for aerospace circuit breakers (use together)
- EN 2282 - Aircraft electrical supply standards (system compatibility)
- ICS reference: 49.060 (Aerospace electric equipment and systems)
Keywords: EN 2794-003, circuit breakers, temperature compensated, single‑pole, metric thread terminals, aerospace standard, aircraft electrical systems, rated currents 20 A to 50 A.
Relations
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Refers
ISO 1190-1:1982 - Copper and copper alloys — Code of designation — Part 1: Designation of materials - Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 2794-003:1999 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Circuit breakers, single-pole, temperature compensated, rated currents 20 A to 50 A - Part 003: Metric thread terminals - Product standard". This standard covers: This standard specifies the required characteristics for single-pole, temperature compensated circuit breakers, rated currents from 20 A to 50 A, metric thread terminals, for use in aircraft electrical systems, at temperatures between - 55°C and 125°C and at a maximum altitude of Z = 15 000 m. It shall be used together with EN 2794-001. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.
This standard specifies the required characteristics for single-pole, temperature compensated circuit breakers, rated currents from 20 A to 50 A, metric thread terminals, for use in aircraft electrical systems, at temperatures between - 55°C and 125°C and at a maximum altitude of Z = 15 000 m. It shall be used together with EN 2794-001. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.
EN 2794-003:1999 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 2794-003:1999 has the following relationships with other standards: It is inter standard links to ISO 7045:1994, ISO 965-2:1998, ISO 1190-1:1982, EN ISO 9013:2002/A1:2003, EN 2282:1992, EN 2350:2024, EN 2794-001:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 2794-003:1999 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 - Circuit breakers, single-pole, temperature compensated, rated currents 20 A to 50 A - Part 003: Metric thread terminals - Product standardLuft- und Raumfahrt - Schutzschalter, einpolig, temperaturkompensiert, Nennströme von 20 A bis 50 A - Teil 003: Metrisches Klemmengewinde - ProduktnormSérie aérospatiale - Disjoncteurs unipolaires compensés en température, intensités nominales 20 A a 50 A - Partie 003: Bornes a f
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