The Siemens 3VA2440-7MQ32-0KH0 is a 3-pole IEC frame 630 circuit breaker with a class C breaking capacity of 110 kA at 415 V. It's built around the ETU860m trip unit for motor protection, providing LSIG (long-time, short-time, instantaneous, ground-fault) protection curves. Rated In of 400 A, with overload protection adjustable from 160 to 400 A and short-circuit protection from 1.2 to 15 times In. Ground-fault is switchable from 0.2 to 1 times In with a time delay of 0.05 to 0.8 seconds.
Designed for busbar connection in panel or enclosure builds. The integrated shunt trip (STL) operates on 208-277 V AC (50/60 Hz) or 220-250 V DC, allowing remote tripping from a safety circuit or emergency-stop chain. The ETU860m unit supports communication-ready accessories for integration into higher-level control systems.