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Legrand 4P 40A 30mA RCCB (DX3) – Residential

The Legrand DX3 RCCB FP 40A 30mA is a four-pole (4P) residual current circuit breaker designed for 230V residential applications. Installed as a main incomer, it provides dedicated earth leakage protection by monitoring the balance between phase and neutral currents. This 350g device is essential for modern distribution boards to prevent shock hazards.

Quick Answer

Yes, you should absolutely buy the Legrand DX3 4P 40A 30mA RCCB if you're upgrading or installing a new residential distribution board in India. Its 30mA sensitivity is specifically engineered to protect against fatal electric shocks, a crucial safety standard for homes. As a 4-pole device, it provides comprehensive protection for 230V systems, ensuring peace of mind against earth leakage faults. This makes it an indispensable safety component for any modern Indian household.

✓Immediate shock protection for residents — 30mA sensitivity trips in less than 300ms at 1x Idn.
✓10kA breaking capacity provides robust structural resilience during severe electrical faults.
✓Safeguards against high-temperature fire risks — housing passes the 850°C glow wire test.
✓400A making and breaking capacity allows the device to handle significant switching surges.
✓Durable internal components ensure longevity — rated for 4,000 electrical endurance cycles.
✓4P (4 Pole) configuration with switched neutral ensures complete isolation of all conductors.

Perfect for Indian homeowners and electricians seeking robust 230V residential earth leakage protection, the Legrand DX3 4P 40A 30mA RCCB excels as a main incomer. This device is not suitable for industrial or commercial applications needing higher current thresholds. Choose it for paramount household electrical safety.

Product Overview
The Legrand DX3 RCCB FP 40A 30mA is a four-pole (4P) residual current circuit breaker designed for 230V residential applications. Installed as a main incomer, it provides dedicated earth leakage protection by monitoring the balance between phase and neutral currents. This 350g device is essential for modern distribution boards to prevent shock hazards.

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Engineering Analysis
A 30mA sensitivity rating is specifically chosen for residential safety because it trips before leakage current reaches levels that cause cardiac arrest. The 10kA breaking capacity ensures the device maintains structural integrity during high-fault events when paired with a backup MCB. Its 4-module width of 72mm allows for standard integration into 35mm DIN rail setups while managing a 40A continuous load.

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