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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

You absolutely should consider buying the ABB FW204 40A 4P 100mA RCCB if you're upgrading or installing a new main incomer for a multi-phase Indian residential system. Its 100mA trip sensitivity is the gold standard for fire protection, detecting dangerous earth leakages before they escalate. This Italian-made Type AC device ensures superior safety and compliance with Indian standards, making it a robust choice for safeguarding your property and family from electrical hazards.

✓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.

The ABB FW204 40A 4P 100mA RCCB is perfect for Indian residential main incomers, providing essential fire protection against earth leakage in multi-phase systems. Avoid if 30mA sensitivity is required for specific socket circuits, or for single-phase installations. It ensures comprehensive whole-house safety.

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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