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Legrand 4P 63A 30mA RCBO (DX3) – residential

The Legrand DX3 RCBO AC Type FP is a 63A rated safety device with 30mA sensitivity designed for residential protection.It serves as a comprehensive four-pole (4P) solution that integrates earth leakage, overload, and short circuit protection into a single 72mm wide module.

Quick Answer

Yes, you should buy the Legrand DX3 4P 63A 30mA RCBO if you prioritize ultimate electrical safety for your Indian home's main incomer. Its 30mA sensitivity offers critical life protection, detecting faults within milliseconds, while the 10kA breaking capacity secures your main supply from severe overcurrents. Ideal for residential installations needing robust, integrated protection.

✓Stops lethal shocks by detecting 30mA leakages — trips in ≤300ms at 1x rated residual current.
✓Engineered with a 10kA short circuit breaking capacity to prevent electrical fires during major faults.
✓Simplifies your distribution board — requires no backup MCB due to integrated overload protection.
✓Built for extreme durability with 10,000 mechanical cycles and 4,000 electrical endurance cycles.
✓Reduces heat buildup in the panel — features a low power loss of just 1.5W per pole.
✓Complies with rigorous safety standards — BIS marked and passes the 850°C glow wire test.

Opt for this Legrand RCBO for premium Indian residential installations that demand robust, integrated protection at the main incomer. Avoid if a lower current rating is sufficient, or if extreme budget constraints dictate separate MCB/RCCB units over the convenience and superior safety of this all-in-one 4P solution.

Product Overview
The Legrand DX3 RCBO AC Type FP is a 63A rated safety device with 30mA sensitivity designed for residential protection. It serves as a comprehensive four-pole (4P) solution that integrates earth leakage, overload, and short circuit protection into a single 72mm wide module. Installed at the final circuit or incomer, it monitors 415V systems to disconnect power the moment a fault is detected.

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Engineering Analysis
The 30mA sensitivity is critical for life safety as it triggers an instantaneous trip within 40ms at 5x Idn, well before muscle contraction occurs. Its 10kA breaking capacity is essential for residential incomers to safely quench high-energy faults without the device self-destructing. The 4P design ensures a switched neutral, providing full isolation of all conductors which is a vital safety requirement in modern Indian homes.

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