The Siemens 3VA2563-5MN32-0BH0 is a 3-pole IEC frame 1000 motor protection circuit breaker rated for 630 A continuous current, with a breaking capacity of 55 kA at 415 V (class M). It carries the ETU350M electronic trip unit configured for LSI protection — long-time, short-time, and instantaneous — with overload protection adjustable from 250 A to 630 A and short-circuit pickup from 3 to 15 times Ir. The instantaneous fixed pickup is 15 times In.
The 630 A frame and the ETU350M LSI trip unit make this breaker suited for large motor loads — think 300+ kW induction motors on 400 V three-phase. The undervoltage release (UVR) at 24 V DC allows a safety circuit or E-stop chain to drop the breaker open when control power is lost.