SIST EN 2996-005:2025
(Main)Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A - Part 005: With polarized signal contact - Product standard
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A - Part 005: With polarized signal contact - Product standard
This document specifies the characteristics of three-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 for ratings ≤ 15 A and −55 °C and 90 °C for ratings > 15 A 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 polarized 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, dreipolig, temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 005: Mit polarisiertem Signalkontakt - Produktnorm
Dieses Dokument legt die Eigenschaften von dreipoligen, temperaturkompensierten Schutzschaltern mit Nennströmen von 1 A bis 25 A fest, die in Luftfahrzeug-Bordnetzen im Temperaturbereich zwischen −55 °C und 125 °C für Nennströme ≤ 15 A und zwischen −55 °C und 90 °C für Nennströme > 15 A sowie bei einer Höhenlage von höchstens 22 000 m verwendet werden.
Diese Schutzschalter besitzen einen Druckknopf (Betätigungsknopf) mit Druck-Zug-Betätigung mit Freiauslösung und verzögerter Auslösefunktion und einen polarisierten Signalkontakt, der bei geschlossenen Hauptkontakten geöffnet ist und umgekehrt.
Ihre Funktion ist bis zum Kurzschlussstrom sichergestellt.
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 1 A à 25 A - Partie 005 : Avec contact de signalisation polarisé - Norme de produit
No Scope available
Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, nazivni tok od 1 A do 25 A - 005. del: S polariziranim signalnim kontaktom - Standard za proizvod
Ta dokument določa značilnosti tripolnih odklopnikov, temperaturno kompenziranih, z nazivnim tokom od 1 A do 25 A, ki se uporabljajo v letalskih vezjih pri temperaturi od –55 °C do 125 °C za nazivne vrednosti ≤ 15 A in od –55 °C do 90 °C za nazivne vrednosti > 15 A ter na največji višini 22.000 m. Ti odklopniki se upravljajo z enim gumbom (sprožilom) vrste potisni-povleci, z zakasnjenim proženjem brez sprožila s polariziranim signalnim kontaktom, ki se odpre, ko so glavni kontakti zaprti in obratno. Delovali bodo do kratkega stika.
General Information
Relations
Overview
EN 2996-005:2025 is a CEN product standard in the Aerospace series that defines requirements for three‑pole, temperature‑compensated circuit breakers with rated currents from 1 A to 25 A. It covers devices intended for aircraft on‑board circuits operating across defined environmental envelopes (temperatures from −55 °C up to 125 °C for ≤15 A; up to 90 °C for >15 A) and up to 22 000 m altitude. These breakers use a push‑pull single push‑button actuator, provide delayed action “trip‑free” tripping and incorporate a polarized signal contact (open when main contacts are closed). The standard supersedes EN 2996‑005:2006 and references EN 2996‑001:2023 for technical specifications.
Key topics and technical requirements
- Rated currents: 1 A to 25 A (main contacts) with specific voltage options including 28 V DC, 26 V AC (360–800 Hz) and 115/200 V AC (360–800 Hz).
- Environmental limits: Temperature ranges and max altitude (22 000 m) for performance and dielectric tests.
- Signal contact: Polarized auxiliary contact behavior and diode characteristics (e.g., max 0.5 A at 125 °C; peak repetitive reverse voltage ≥ 800 V).
- Mechanical & electrical performance:
- Mass: max 64 g (delivery code A with hardware).
- Mechanical endurance: 5 000 no‑load and 2 500 load operations.
- Short‑circuit capability: prospective currents up to 1 800 A RMS (test conditions defined).
- Dielectric rigidity, insulation resistance, voltage drop tables and overload/short‑circuit trip thresholds with ambient‑temperature considerations.
- Installation details: Panel cut‑out, recommended tightening torques ((4.75 ± 0.25) Nm for attaching nut; (1.6 ± 0.1) Nm for connection hardware) and recommended insertion/extraction tools for auxiliary contacts.
- Vibration & shock: Defined sinusoidal/random/low‑frequency vibration levels and shock resistance (50 g) per referenced mechanical tests.
- Marking, designation and delivery codes: Requirements for identification and product information.
Applications
- Specification for selection, design, procurement and quality assurance of circuit breakers used in:
- Commercial and military aircraft electrical distribution systems
- Avionics and power distribution panels
- Replacement and aftermarket components for aircraft maintenance and overhaul
- Useful for system integrators, harness designers and certification teams to ensure component compatibility with aircraft environmental and safety requirements.
Who should use this standard
- Aerospace component manufacturers and designers
- Aircraft electrical engineers and system integrators
- MRO organizations, procurement specialists and certification bodies (airworthiness authorities)
- Test labs validating breaker performance to aerospace environmental and electrical criteria
Related standards
- EN 2996‑001:2023 (technical specification for the same series)
- EN 6113 (connecting and attachment hardware)
- Applicable military/industry references cited (e.g., MIL‑PRF‑19500, AMS‑STD‑595)
Keywords: EN 2996‑005:2025, three‑pole circuit breakers, temperature compensated, polarized signal contact, aerospace, aircraft on‑board circuits, rated current 1 A to 25 A, trip‑free, push‑pull actuator.
Frequently Asked Questions
SIST EN 2996-005:2025 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A - Part 005: With polarized signal contact - Product standard". This standard covers: This document specifies the characteristics of three-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 for ratings ≤ 15 A and −55 °C and 90 °C for ratings > 15 A 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 polarized signal contact which is open when main contacts are closed, and inversely. They will continue to function up to the short-circuit current.
This document specifies the characteristics of three-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 for ratings ≤ 15 A and −55 °C and 90 °C for ratings > 15 A 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 polarized 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 2996-005:2025 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 2996-005:2025 has the following relationships with other standards: It is inter standard links to SIST EN 2996-005:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 2996-005:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, nazivni tok od 1 A
do 25 A - 005. del: S polariziranim signalnim kontaktom - Standard za proizvod
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current
1 A to 25 A - Part 005: With polarized signal contact - Product standard
Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme
von 1 A bis 25 A - Teil 005: Mit polarisiertem Signalkontakt - Produktnorm
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités
nominales 1 A à 25 A - Partie 005 : Avec contact de signalisation polarisé - Norme de
produit
Ta slovenski standard je istoveten z: EN 2996-005:2025
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.
EN 2996-005
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2025
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2996-005:2006
English Version
Aerospace series - Circuit breakers, three-pole,
temperature compensated, rated currents 1 A to 25 A -
Part 005: With polarized signal contact - Product standard
Série aérospatiale - Disjoncteurs tripolaires compensés Luft- und Raumfahrt - Schutzschalter, dreipolig,
en température, intensités nominales 1 A à 25 A - temperaturkompensiert, Nennströme von 1 A bis 25 A
Partie 005 : Avec contact de signalisation polarisé - - Teil 005: Mit polarisiertem Signalkontakt -
Norme de produit Produktnorm
This European Standard was approved by CEN on 14 April 2025.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
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. EN 2996-005:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Dimensions and mass . 4
4.1 Dimensional characteristics . 4
4.2 Electrical diagram . 6
4.3 Mass . 6
4.4 Panel mounting . 6
5 Characteristics . 6
5.1 Material, surface treatment . 6
5.2 Material characteristics . 6
5.2.1 Fasteners . 6
5.2.2 Recommended tightening torque of attaching nut for installation . 6
5.2.3 Recommended tightening torque of connection hardware for installation . 6
5.2.4 Recommended tools for contacts of auxiliary contact insertion and extraction . 7
5.2.5 Resistance to vibrations . 7
5.2.6 Resistance to shocks . 7
5.2.7 Mechanical endurance . 7
5.3 Environment characteristics . 7
5.3.1 Humidity . 7
5.3.2 Corrosion . 7
5.3.3 Contaminating liquids . 7
5.3.4 Overvoltage caused by lightning . 7
5.4 Electrical characteristics . 7
6 Designation . 12
7 Rated current code . 12
8 Delivery codes . 12
9 Marking . 13
10 Technical specification . 13
Bibliography . 14
European foreword
This document (EN 2996-005:2025) 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 shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by December 2025, and conflicting national standards shall be
withdrawn at the latest by December 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document will supersede EN 2996-005:2006.
EN 2996-005:2006:
— EN 2996-005 (P3), 08/2006:
o update of Clause 2 “Normative references”;
o addition of Clause 3 “Terms and definitions”;
o update of Table 1 and Table 6 to add 28 V DC and 26 V AC, 360 Hz to 800 Hz as
a nominal voltage.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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 the
United Kingdom.
1 Scope
This document specifies the characteristics of three-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 for ratings ≤ 15 A and −55 °C and 90 °C for ratings > 15 A 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 polarized signal contact which is open when main contacts are closed,
and inversely.
They will continue to function up to the short-circuit current.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2996-001:2023, Aerospace series — Circuit breakers, three-pole, temperature compensated,
...
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