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Legrand 4P 25A 300mA RCCB (DX3) – residential

The Legrand DX3 RCCB FP 25A 300mA is a four-pole residual current circuit breaker designed for residential main incomer applications. Operating at 400V with a 25A rated current, this Type AC device provides dedicated earth leakage protection without integrated overload or short circuit functions.

Quick Answer

Yes, invest in the Legrand DX3 4P 25A 300mA RCCB if your residential main incomer requires dedicated high-sensitivity fire protection. This 300mA device is crucial for preventing electrical fires in Indian homes by detecting hazardous earth leakages. Remember to pair it with separate MCBs for complete short-circuit and overload protection.

✓Rapidly disconnects power to prevent fire — 300mA sensitivity trips the circuit in less than 300ms at 1x Idn.
✓10kA conditional short circuit rating ensures the unit withstands high-fault currents when paired with an MCB.
✓Enhanced safety for family and property — Instantaneous tripping class reacts immediately to leakage faults.
✓850°C glow wire test rating ensures the housing remains fire-retardant under extreme thermal stress.
✓Saves energy through efficient design — 1.5W power loss per pole reduces heat buildup in your distribution board.
✓BIS certified safety compliance — Meets IS 12640 1 and IS 12640 2 standards for Indian homes.

This Legrand DX3 4P 25A 300mA RCCB is essential for homeowners and electricians prioritizing superior fire safety at the main incomer in Indian residences. However, avoid if your application demands integrated overload or short-circuit protection, as this unit provides specialized earth leakage detection only.

Product Overview
The Legrand DX3 RCCB FP 25A 300mA is a four-pole residual current circuit breaker designed for residential main incomer applications. Operating at 400V with a 25A rated current, this Type AC device provides dedicated earth leakage protection without integrated overload or short circuit functions.

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Engineering Analysis
A 300mA sensitivity level is specifically chosen for fire protection in residential distribution boards where lower sensitivity might cause nuisance tripping. The 500A making and breaking capacity ensures the device can safely manage operational surges, while the 4P configuration provides complete isolation of three phases and the neutral line.

Technical Support & FAQs