ABB FW204 40A-30mA Specifications, Features & Compatibility Guide

The 30 mA sensitivity level is essential for domestic safety as it responds to leakage current levels well below the threshold of cardiac fibrillation. A 10 kA breaking capacity provides robust protection at the main distribution point when coordinated with a backup MCB, while the 4P solid neutral design ensures total isolation of all active conductors across its 72mm width.