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Schneider Electric A9CR8440 — Residual Current Breakers (RCCB/RCBO)

Schneider Electric A9CR8440 Acti9 REDm RCCB, 40 A, 30 mA, 4P

MPNA9CR8440
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Schneider Electric Acti9 REDm, 4P RCCB, 40 A, 30 mA, 50 Hz, DIN rail, grey.

Schneider Electric A9CR8440 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

A9CR8440 — Residual Current Protection
ParameterValue
Earth-leakage sensitivity (IΔn)30 mA
Earth-leakage protection class / typeType A
Earth-leakage trip time delayInstantaneous
Residual-current tripping technologyVoltage independent
Local signalling / indication1 LED Residual current device : ON/OFF indication green
A9CR8440 — Electrical Ratings
ParameterValue
Rated current (In)40 A
Rated operational voltage (Ue)400 V AC 50 Hz
Poles description4P
Neutral pole positionRight
Network typeAC
Network frequency50 Hz
Rated insulation voltage (Ui)500 V AC 50 Hz conforming to EN 50557
Rated impulse withstand voltage (Uimp)4 kV
Device location in systemOutgoer
Electrical durability4000 cycles 230 V AC 50 Hz open-close conforming to EN 50557
Mechanical durability (operating cycles)4000 cycles open-close
A9CR8440 — Identification
ParameterValue
Product nameActi9 REDm
Product / component typeResidual current circuit breaker (RCCB)
A9CR8440 — Mechanical
ParameterValue
Mounting supportDIN rail
Control typeToggle
Width in 9 mm modules14
Terminal connectionsGuard tunnel terminal 35 mm² rigid Guard tunnel terminal 35 mm² flexible Guard tunnel terminal 35 mm² flexible with ferrule
Wire stripping lengthPower circuit: 12 mm Signaling: 5 mm
Terminal tightening torquePower circuit: 3 N.m Signaling: 0.5 N.m
Width126 mm
Height106 mm
Depth81 mm
A9CR8440 — Environmental
ParameterValue
Operating ambient temperature-25...60 °C
Storage ambient temperature-40...70 °C
IP degree of protectionIP20 conforming to EN/IEC 60529
Pollution degree2 conforming to EN 50557
Relative humidity95 % at 55 °C
Operating altitude0...2000 m
Tropicalisation2 conforming to IEC 61008
A9CR8440 — Approvals
ParameterValue
StandardsEN/IEC 61008-1

Product details

The Schneider Electric A9CR8440 is a 4-pole (4P) residual current circuit breaker (RCCB) from the Acti9 REDm series, rated at 40 A with 30 mA earth-leakage sensitivity on a 50 Hz AC network. The 30 mA sensitivity is the standard threshold for personal protection against indirect contact in TN-S and TT earthing systems — it trips before leakage current reaches a level that could cause ventricular fibrillation.

Autotest and diagnostics

This RCCB includes an automatic self-test feature that runs every 10 seconds when line voltage exceeds 195 V. If a fault is detected, the device re-checks every 2 minutes — the insulation fault diagnosis logic identifies persistent leakage and distinguishes it from a transient event. A green LED provides local ON/OFF indication for the RCCB status. Manual test is also available via the toggle control.

Pollution degree 2 per EN 50557, tropicalisation class 2 per IEC 61008. IP20 rated (finger-safe terminals), IK05 impact resistance.

Frequently asked questions

How do I get current pricing and availability for A9CR8440?

The A9CR8440 is sourced and quoted to order against an RFQ through independent distribution — availability and current pricing confirmed at quote time.

What is A9CR8440's listed depth?

The A9CR8440 has a product depth of 81 mm.

What is the reset type for A9CR8440?

The A9CR8440 uses a fault reset for earth leakage — the toggle must be manually reset after a trip caused by residual current.

What compliance documentation does the A9CR8440 carry?

The A9CR8440 is designed to EN/IEC 61008-1, with pollution degree 2 per EN 50557 and tropicalisation class 2 per IEC 61008.

MPN
A9CR8440