FprEN IEC 61009-2-1:2026/FprAA:2026

• Abstract:

  IEC 61009-1:2024, Clause 1 is applicable except for the first paragraph and the last paragraph, which are replaced by the following, respectively: This document applies to residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (hereafter referred to as RCBOs), classified according to IEC 61009-1:2024, 4.1.1. RCBOs according to this document are intended for voltages not exceeding 440 V AC with frequencies of 50 Hz, 60 Hz or 50/60 Hz and currents not exceeding 125 A and rated short-circuit capacities not exceeding 25 000 A for operation at 50 Hz or 60 Hz. This document applies in conjunction with IEC 61009-1:2024. It specifies requirements, tests and test sequences to verify compliance and is used for certification purposes.

• Status: Not Published
• Publication Date: 04-Feb-2027
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: CLC/TC 23E - Circuit breakers and similar devices for household and similar applications
• Drafting Committee: CLC/TC 23E/WG 01 - Maintenance of TC23E standards
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 03-Aug-2026
• Due Date: 12-Feb-2027
• Completion Date: 03-Aug-2026
• Ref Project: oSIST prEN IEC 61009-2-1:2026/oprAA:2026 - Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 2-1: RCBOs according to classification 4.1.1

Overview

FprEN IEC 61009-2-1:2026/FprAA:2026 defines specific requirements for residual current operated circuit-breakers with integral overcurrent protection (RCBOs) for household and similar applications, classified under IEC 61009-1:2024 clause 4.1.1. This European draft amendment by CLC/TC 23E covers RCBOs intended for voltages up to 440 V AC, frequencies of 50 Hz, 60 Hz, or 50/60 Hz, currents up to 125 A, and short-circuit capacities up to 25,000 A. The standard augments and modifies base requirements of IEC 61009-1:2024, focusing on enhanced testing, temperature performance, and sample handling. It supports industry-wide compliance, certification, and safety assurance for electrical protection devices used in residential and similar installations.

Key Topics

• RCBO Classification and Application: This document details requirements specifically for RCBOs falling under classification 4.1.1 of IEC 61009-1:2024, aligning product performance characteristics with intended end-use environments.
• Temperature Performance: New and revised sections require RCBOs to be tested and verified for reliable operation within a temperature range of -25 °C to +40 °C. The testing procedures ensure that RCBOs maintain their functionality and materials integrity under varying climatic conditions.
• Test Procedures and Sequences: The amendment revises test circuits, procedures, and tables covering:
  • Operating characteristics at low temperatures
  • Trip-free mechanism verification
  • Sample sizes for both full and simplified test procedures
  • Test sequences for RCBOs with different tripping currents and classifications
• Sample Handling and Acceptance Criteria: Updated rules on sample quantities and arrangements, ensuring comprehensive testing across device variants and ratings.
• Normative References and Special National Conditions: Inclusion of references to related international and European standards, as well as “Special National Conditions” relevant to specific countries, such as the prohibition of type AC RCBOs in Germany.

Applications

This standard is essential for manufacturers, testing laboratories, certification bodies, and regulatory authorities involved in the production, testing, and approval of RCBOs for household and similar uses. Key applications include:

• Product certification and conformity assessment for placing RCBOs on the European market.
• Specification and quality assurance for manufacturers developing RCBOs that must perform reliably under diverse voltage, frequency, and temperature conditions.
• End-user protection in residential, commercial, and analogous electrical installations, ensuring compliance with stringent safety requirements.
• Design guidance for electrical engineers and system designers seeking compliance with up-to-date RCBO testing, classification, and operational requirements.

Related Standards

• IEC 61009-1:2024 - General rules for residual current operated circuit-breakers with integral overcurrent protection (RCBOs), providing the foundational requirements referenced in this amendment.
• IEC 61543:2022 / EN IEC 61543:2023 – Electromagnetic compatibility requirements for RCDs used in households and similar environments.
• IEC 62873-2 – Vocabulary for RCBOs, supporting consistent terminology and understanding across standards.

For professionals involved in electrical safety, product development, and certification in the European market, FprEN IEC 61009-2-1:2026/FprAA:2026 is a key standard ensuring that RCBOs meet rigorous European performance and safety requirements. Its rigorous approach to temperature, testing, and harmonization with related international standards underlines its practical value in supporting high-quality, reliable, and safe electrical protection devices.

SLOVENSKI STANDARD
01-februar-2026
Odklopniki na preostali (residualni) tok brez vgrajene nadtokovne zaščite za
gospodinjsko in podobno rabo (RCBOs) - 2-1. del: RCBO v skladu s klasifikacijo
4.1.1
Residual current operated circuit-breakers with integral overcurrent protection for
household and similar uses (RCBOs) - Part 2-1: RCBOs according to classification 4.1.1
Fehlerstrom-/Differenzstrom-Schutzschalter mit eingebauten Überstromschutz für
Hausinstallationen und für ähnliche Anwendungen (RCBOs) - Teil 2-1: RCBOs nach
Klassifikation 4.1.1
Ta slovenski standard je istoveten z: prEN IEC 61009-2-1:2026/prAA:2026
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
oSIST prEN IEC 61009-2- en
1:2026/oprAA:2026
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 61009-2-1:2026
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
January 2026
ICS 29.120.50 -
English Version
Residual current operated circuit-breakers with integral
overcurrent protection for household and similar uses (RCBOs) -
Part 2-1: RCBOs according to classification 4.1.1
To be completed Fehlerstrom-/Differenzstrom-Schutzschalter mit
eingebauten Überstromschutz für Hausinstallationen und
für ähnliche Anwendungen (RCBOs) - Teil 2-1: RCBOs
nach Klassifikation 4.1.1
This draft amendment prAA, if approved, will modify the European Standard prEN IEC 61009-2-1:2026; it is submitted to CENELEC
members for enquiry.
Deadline for CENELEC: 2026-04-24.

It has been drawn up by CLC/TC 23E.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

This draft amendment was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 82334 Ref. No. prEN IEC 61009-2-1:2026/prAA:2026 E

prEN IEC 61009-2-1:2026/prAA:2026 (E)
1 Contents Page
2 European foreword . 3
3 1 Modification to 9.9.1.1, “Test circuit and test procedure” . 4
4 2 Modification to 9.15.1, “General test conditions” . 4
5 3 Addition of 9.Z1, “Verification of the correct operation at low ambient air temperatures for
6 RCBOs for use at temperatures between −25 °C and +40 °C” . 4
7 4 Modification to Figure 2, “Test circuit for the verification of operating characteristics, and
8 trip-free mechanism for RCBOs classified according to 4.1.1” . 5
9 5 Addition of Figure Z6, “Test cycle for low temperature test (9.Z1)”. 5
10 6 Modification to Table A.1, “Test sequences” . 5
11 7 Modification to A.2, “Number of samples to be submitted for full test procedure” . 6
12 8 Modification to Table A.2, “Number of samples for full test procedure” . 6
13 9 Modification to Table A.3, “Number of samples for simplified test procedure” . 6
14 10 Modification to Table A.4, “Test sequences for RCBOs having different instantaneous
15 tripping currents” . 7
16 11 Modification to Table A.5, “Test sequences for RCBOs of different classification
17 according to 4.3 of IEC 61009-1:2024” . 7
18 12 Addition of Annex ZA, “Normative references to international publications with their
19 corresponding European publications” . 7
20 13 Addition of Annex ZB, “Special National Conditions” . 8
prEN IEC 61009-2-1:2026/prAA:2026 (E)
21 European foreword
22 This document (prEN IEC 61009-2-1:2026/prAA:2026) has been prepared by CLC/TC 23E “Circuit breakers
23 and similar devices for household and similar applications”.
24 This document is currently submitted to the Enquiry.
25 The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 60 months (to
conflicting with this document have to be be confirmed or
withdrawn modified when voting)
26 This document is read in conjunction with prEN IEC 61009-2-1:2026.
27 This document includes the following significant technical modifications with respect to
28 prEN IEC 61009-2-1:2026:
29 — Only the essential common changes existing in EN 61009-2-1:1994 and all of its amendments and
30 corrigenda (if any) are maintained in this document.
prEN IEC 61009-2-1:2026/prAA:2026 (E)
32 1 Modification to 9.9.1.1, “Test circuit and test procedure”
33 Delete the last paragraph
34 2 Modification to 9.15.1, “General test conditions”
35 Delete the 2nd paragraph.
36 3 Addition of 9.Z1, “Verification of the correct operation at low ambient air
37 temperatures for RCBOs for use at temperatures between −25 °C and +40 °C”
38 Add the following subclause:
39 “9.Z1 Verification of the correct operation at low ambient air temperatures for RCBOs for use at
40 temperatures between −25 °C and +40 °C
41 Enclosed-type RCBOs are tested in their enclosure, unenclosed-type RCBOs are mounted in an individual
42 enclosure with a degree of protection IP55, and are connected as for normal use (see Figure 2).
43 No drain hole in the enclosure shall be opened for this test.
44 NOTE RCBOs tested in enclosures IP55 are suitable to be used in enclosures of a degree of protection other than
45 IP55 within the temperature range of –25 °C to +40 °C.
46 The RCBO (including the enclosure) is brought into a suitable test chamber with an ambient air temperature of
47 (23 ± 2) °C and a relative humidity of (93 ± 3) %. The volume ratio of the test chamber to the test samples
48 (including enclosures) shall be greater than 50.
49 The RCBO is in the ON-position without load and shall be subjected to the following cycle (see Figure Z6).
50 For the first 6 h (stabilization period) the temperature is kept at (23 ± 2) °C and the humidity at (93 ± 3) %.
51 Within the next 6 h the ambient air temperature is decreased to (−25 ± 2) °C without any supply of humidity.
52 This temperature of (−25 ± 2) °C is kept for 6 h. Within the next 6 h the temperature is increased to (+
53 23 ± 2) °C and the relative humidity is increased to (93 ± 3) % (end of the first cycle). This cycle is performed
54 five times.
55 During these cycles the RCBO shall not trip.
56 During the fifth cycle, at the end of the period at (−25 ± 2) °C, an AC residual current is passed through one
57 pole of the RCBO (see Figure 2)
58 — for RCB
...