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Legrand 4P 16A 300mA RCBO (DX3) – [Residential]

The Legrand DX3 RCBO AC Type FP 16A 300mA is a four-pole integrated safety device designed for residential final circuit protection.It provides combined protection against earth leakage, 16A overloads, and 6kA short circuits within a compact 4-module DIN rail footprint.

Quick Answer

Absolutely, if you need superior fire protection in your Indian residential main distribution board. The Legrand DX3 4P 16A 300mA RCBO specifically addresses nuisance tripping often associated with more sensitive devices in local conditions, while providing robust 4-pole earth leakage, overload, and short-circuit protection. It's a critical upgrade for enhanced home safety.

✓Prevents electrical fires by detecting 300mA residual currents and tripping in ≤300ms.
✓High-performance short circuit protection is guaranteed by the 6kA breaking capacity rating.
✓Reduces installation complexity as it requires no backup MCB for residential loads up to 16A.
✓Mechanical longevity is ensured for over 10,000 cycles for sustained reliability in Indian homes.
✓Halogen-free and RoHS compliant construction ensures no toxic fumes are released at 850°C.
✓Visual status monitoring is simplified by the grey test button and dedicated trip indicator.

Invest in this Legrand DX3 RCBO for robust fire protection across your Indian residential main distribution board, particularly to avoid nuisance tripping from 30mA devices. It’s perfect for upstream circuit safety, but not for individual appliance protection requiring 30mA sensitivity.

Product Overview
The Legrand DX3 RCBO AC Type FP 16A 300mA is a four-pole integrated safety device designed for residential final circuit protection. It provides combined protection against earth leakage, 16A overloads, and 6kA short circuits within a compact 4-module DIN rail footprint. This current-operated device ensures isolation of all four poles during a fault, meeting IS 12640 1 standards.

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Engineering Analysis
The 300mA sensitivity is optimized specifically for fire protection in residential distribution boards where 30mA devices might cause nuisance tripping. A 16A rated current paired with a B-curve trip characteristic ensures rapid disconnection during low-level short circuits, while the 4P switched neutral prevents potential differences in the return path. The 10,000-cycle mechanical endurance ensures long-term reliability for Indian households with fluctuating power conditions.

Technical Support & FAQs