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ABB 40A 4P 100mA RCCB (FW204) – Residential

The ABB FW204 40A-100mA is a four-pole Residual Current Circuit Breaker (RCCB) engineered specifically for the main incomer of residential electrical systems.

Quick Answer

Yes, invest in the ABB FW204 40A 4P 100mA RCCB for superior residential safety. Its 100mA sensitivity specifically targets fire prevention by detecting hazardous earth leakage currents before they escalate. This Italian-made, 4-pole device is a critical addition for any 400V Indian home's main incomer, offering robust protection far beyond standard MCBs and adhering to IS 12640.

✓Reduces fire risk in old or complex wiring — 100mA sensitivity trips the circuit in ≤300ms.
✓10kA breaking capacity — engineered to survive and interrupt high fault currents at the distribution board.
✓Provides immediate disconnection during leakage — instantaneous tripping class prevents thermal buildup.
✓4kV impulse withstand rating — protects internal components from sudden electrical surges and grid spikes.
✓Durable Italian engineering — tested for 10,000 mechanical and 4,000 electrical endurance cycles.
✓Wide operational range — maintains consistent safety across temperatures from -25°C to +55°C.

This ABB FW204 is essential for Indian residential main incomers requiring robust 100mA earth leakage fire protection. It’s ideal if you prioritize preventing thermal ignition at 400V. Avoid if your application demands direct human contact protection (30mA) or a Type A RCCB for pulsating DC faults.

Product Overview
The ABB FW204 40A-100mA is a four-pole Residual Current Circuit Breaker (RCCB) engineered specifically for the main incomer of residential electrical systems. This Type AC safety device provides critical earth leakage protection at 400V, ensuring current imbalances are detected before they cause harm. Manufactured in Italy, it adheres to international IEC 61008-1 and Indian IS 12640 standards for high-reliability circuit interruption.

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Engineering Analysis
The 100mA sensitivity is the industry standard for fire protection, as it detects leakage currents that are too low to trip an MCB but high enough to cause thermal ignition. With a 10kA breaking capacity and a Class 3 energy limiting designation, this device manages high-energy fault conditions far better than standard residential components. The 4P configuration with solid neutral protection ensures that all three phases and the neutral are isolated simultaneously during a fault, preventing dangerous neutral-to-earth potential differences.

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