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ABB 4P 40A 30mA RCCB (FW204 40A-30mA) – Residential

The ABB FW204 40A-30mA is a 4-pole (4P) Residual Current Circuit Breaker specifically engineered for 400V residential electrical systems. Functioning as a main incomer, this 40A rated device monitors the 50 Hz current balance to provide dedicated earth leakage protection against sinusoidal alternating currents (Type AC).

Quick Answer

Yes, invest in the ABB FW204 40A-30mA RCCB if you need robust 4-pole earth leakage protection for your 400V residential main incomer. Its 30mA sensitivity is crucial for protecting against life-threatening electrical shocks in Indian homes. This device ensures superior safety and compliance, particularly for new installations or upgrades requiring reliable sinusoidal AC fault detection.

✓Protects residents from cardiac arrest — 30mA sensitivity trips the power in ≤300ms during a leakage event.
✓10kA conditional short circuit rating — provides high-level resilience against massive grid-side faults at the incomer.
✓Decades of reliable operation — rated for 10,000 mechanical endurance cycles to ensure the safety mechanism never sticks.
✓4kV impulse withstand capability — protects sensitive internal components from atmospheric voltage surges and spikes.
✓Low heat generation in panels — minimizes energy waste with a low power loss of only 1.5W per pole.
✓Compliance with Indian safety codes — certified to IS 12640 1 and IS 12640 2 standards for residential building use.

This ABB FW204 40A-30mA RCCB is ideal for Indian homeowners seeking advanced 4-pole earth leakage protection for their main 400V supply. Avoid if your system requires Type A/B protection or a lower sensitivity for specific individual circuits. It’s perfect for ensuring critical safety at the residential incomer.

Product Overview
The ABB FW204 40A-30mA is a 4-pole (4P) Residual Current Circuit Breaker specifically engineered for 400V residential electrical systems. Functioning as a main incomer, this 40A rated device monitors the 50 Hz current balance to provide dedicated earth leakage protection against sinusoidal alternating currents (Type AC).

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Engineering Analysis
The 30 mA sensitivity level is essential for domestic safety as it responds to leakage current levels well below the threshold of cardiac fibrillation. A 10 kA breaking capacity provides robust protection at the main distribution point when coordinated with a backup MCB, while the 4P solid neutral design ensures total isolation of all active conductors across its 72mm width.

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