Schneider ACTI9 RCCB 40A 4P 300mA – Fire-Safety & Earth Leakage Protection for Three-Phase Installations (A9KR14440)
The Schneider ACTI9 RCCB 40A 4P 300mA – A9KR14440 is a superior residual current circuit breaker designed to protect three-phase electrical installations against earth leakage faults, insulation breakdown and electrical fire hazards. Featuring Schneider’s trusted ACTI9 technology, this RCCB ensures dependable protection for people, equipment and building infrastructure across residential, commercial and industrial applications.
Rated at 40 amps, this RCCB is suitable for medium-to-heavy duty load circuits, including motors, lighting systems, AHUs, HVAC units, distribution feeders, pumps, industrial machinery and commercial DB outputs. The 4-pole configuration (L1, L2, L3 + Neutral) ensures complete circuit isolation during leakage faults for maximum safety.
With 300mA leakage sensitivity, this RCCB is specially designed for fire protection and installation safety, detecting leakage currents large enough to cause overheating and potential electrical fire — especially important in high-load and long-cable installations.
The RCCB delivers quick fault detection and stable trip behavior, maintaining reliable protection even in fluctuating industrial power environments. Designed for DIN-rail mounting, it fits effortlessly into 4-pole distribution boards, control panels and industrial switchboards.
Compact, rugged, and maintenance-free, the Schneider A9KR14440 is the ideal solution for organisations and electricians that prioritize long-term safety, compliance, and performance in their electrical networks.
Key Features
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Model: A9KR14440
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40A RCCB – 4 Pole (L1, L2, L3 + N) for three-phase systems
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300mA leakage sensitivity – optimized for fire-safety and insulation monitoring
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Prevents hazards arising from earth faults, insulation breakdown and overheating
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Fast-acting trip mechanism ensures protection for equipment and wiring
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DIN-rail mounting design – plug-and-play installation in DBs and control panels
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Suitable for commercial, industrial and heavy-duty residential three-phase circuits
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High mechanical and electrical endurance for long-life performance
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