Switch disconnector for load isolation
The Siemens 3VA1110-1AA42-0CC0 is a 4-pole switch disconnector from the SENTRON 3VA1 family, rated for 100 A continuous current (Iu) and designed for IEC frames up to 160 A. It provides visible-break isolation without overload or short-circuit protection — it's a disconnect, not a breaker. Rated insulation voltage is 800 V, and the maximum operational voltage is 690 V AC (50/60 Hz) or 600 V DC. The unit accepts busbar connection on the front terminals, making it suitable for distribution panels where busbar tap-offs feed downstream loads. The IP40 front protection means it's splash-proof from the front but not sealed — mount inside an enclosure for washdown environments.
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth. The width is a standard 4-module footprint for panel-mounting on DIN rail or direct screw fixing. The 70 mm depth leaves clearance for busbar connections and auxiliary wiring behind the panel door.