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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, consider the ABB FW204 63A-300mA ELCB if you need robust main incomer protection for your home. Its 300mA sensitivity is purpose-built for fire safety in Indian residential wiring, quickly mitigating arcing risks. Additionally, it safeguards against undervoltage conditions, ensuring comprehensive protection 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.

Opt for this ABB ELCB if your primary need is robust 300mA fire protection and undervoltage safeguarding at your home's main incomer. However, avoid it if you require higher sensitivity (like 30mA for direct human shock protection) or prefer a current-operated RCCB for your specific application.

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