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ABB 4P 63A 300mA ELCB (FW204 63A-300mA) – Home

The ABB FW204 63A-300mA is a 4P voltage-operated ELCB rated for 63A current and 300mA residual sensitivity for residential applications.Installed at the main incomer, this 400V device provides critical earth leakage and undervoltage protection.

Quick Answer

Yes, the ABB FW204 63A-300mA ELCB is an excellent choice for robust residential electrical protection. It delivers critical fire safety with its 300mA sensitivity and undervoltage safeguards, ideally suited for the main incomer in Indian homes. This 4P device, compliant with IS 12640, trips fast to prevent arcing, ensuring superior safety for your household distribution board.

✓Mitigates residential fire risks — 300mA residual current sensitivity detects tracking currents early.
✓Trips in ≤40ms at 5× Idn to provide instantaneous disconnection during high-magnitude earth faults.
✓Long-term operational reliability — mechanical endurance rated for 10,000 cycles.
✓Compact 4-module width of 72mm fits easily into standard DIN rail distribution boards.
✓Withstands transient surges — 4kV impulse withstand rating prevents component damage.
✓Supports heavy-duty wiring — screw terminals accommodate rigid cables up to 25 mm².

Choose the ABB FW204 63A-300mA ELCB for superior fire and undervoltage protection at your home's main incomer. It’s not for direct human contact protection; for those specific circuits, integrate a separate 30mA RCCB.

Product Overview
The ABB FW204 63A-300mA is a 4P voltage-operated ELCB rated for 63A current and 300mA residual sensitivity for residential applications. Installed at the main incomer, this 400V device provides critical earth leakage and undervoltage protection. It is manufactured in Italy and compliant with IS 12640 and IEC 61008-1 standards to ensure rigorous safety for household distribution boards.

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Engineering Analysis
The 300mA sensitivity is specifically engineered for fire protection, tripping in ≤300ms to eliminate arcing risks in home wiring. A 10kA breaking capacity allows the device to handle severe fault levels at the main incomer when coordinated with a backup MCB. With 4,000 electrical endurance cycles, the unit maintains its instantaneous tripping class performance even after repeated fault events.

Technical Support & FAQs