ABB FW202 40A-300mA Specifications, Features & Compatibility Guide

Selecting a 300mA sensitivity is vital for fire prevention at the main incomer where lower sensitivities might cause nuisance tripping from cumulative leakage across multiple sub-circuits. The 10kA conditional short circuit rating ensures the device maintains integrity during high-fault events, while the 4kV impulse withstand voltage protects against atmospheric surges. Its 2P configuration with solid neutral is essential for safely isolating residential 230V systems during a trip event.