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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 buy the Legrand DX3 RCCB if you need robust, reliable earth leakage protection as a main incomer for your 230V residential setup in India. Its crucial 30mA sensitivity ensures immediate tripping, proactively preventing fatal electrical shocks. Coupled with a 40A 4-pole configuration, it’s an ideal safety upgrade for modern Indian homes, ensuring compliance and peace of mind.

✓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.

This Legrand DX3 4P 40A 30mA RCCB is crucial for Indian homeowners prioritising safety, acting as a reliable main incomer for earth leakage protection. Avoid if your application demands industrial-grade current ratings or requires a device with integrated overcurrent protection like an RCBO.

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.

Technical Support & FAQs