1SYF204015R2400

The ABB 1SYF204015R2400 (FB204 AC-40/0.1) is a 4-pole Residual Current Circuit Breaker (RCCB) belonging to the FB200 series, designed to safeguard three-phase and neutral electrical networks against earth fault currents. Featuring a $100text{ mA}$ ($0.1text{ A}$) residual operating sensitivity, it functions efficiently as an upstream fire-protection and sub-main fault protection device, mitigating fire risks caused by persistent insulation breakdown. Built in compliance with IEC 61008 and IS 12640-1 standards, it is widely integrated into commercial, industrial, and heavy residential distribution switchboards.