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Schneider 2P 40A 30mA RCBO (A9D55640) – Residential

The Schneider Electric A9D55640 is a high-performance 40A 2P (1P+N) RCBO specifically engineered for residential safety. This Type AC device functions at 230V and combines earth leakage, short circuit, and overload protection into a compact 1-module form factor. It is designed for installation in final circuits to provide instantaneous tripping during fault conditions.

Quick Answer

Should you buy the Schneider A9D55640? Absolutely, if you're prioritizing comprehensive electrical safety for your Indian home. Its vital 30mA sensitivity prevents fatal shocks, while the 40A overload and 6kA short-circuit protection safeguards your appliances and wiring. This compact 2P RCBO is ideal for modern residential setups, offering superior protection over standard MCBs and RCCBs alone.

✓Stops leakage hazards instantly — 30mA sensitivity trips in less than 300ms.
✓Rated Current 40A — handles modern residential loads including multiple AC units.
✓Occupies 50% less space — 18mm width fits standard 35mm DIN rails.
✓6kA Breaking Capacity — robustly manages short circuit events in domestic grids.
✓Long-term hardware durability — 10,000 electrical cycles ensures lifespan over 15 years.
✓Halogen-free construction — 960°C glow wire test compliance reduces toxic fire risks.

The Schneider A9D55640 is ideal for Indian homeowners and electricians prioritizing superior residential safety, offering 30mA shock protection and robust 40A overload/short-circuit defense. It's an indispensable upgrade for new or existing distribution boards. Avoid if seeking only basic circuit protection without critical earth leakage.

Product Overview
The Schneider Electric A9D55640 is a high-performance 40A 2P (1P+N) RCBO specifically engineered for residential safety. This Type AC device functions at 230V and combines earth leakage, short circuit, and overload protection into a compact 1-module form factor. It is designed for installation in final circuits to provide instantaneous tripping during fault conditions.

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Engineering Analysis
The 30mA sensitivity rating is critical for residential environments as it trips in ≤40ms at 5× Idn to prevent cardiac arrest from direct contact. A 6kA breaking capacity ensures the device can safely interrupt faults at the distribution board without catastrophic failure. The 2P configuration with a switched neutral provides complete electrical isolation, which is safer than 1P protection for home maintenance.

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