The Siemens 3VA1150-6EF42-0AA0 is a SENTRON molded case circuit breaker (MCCB) for line protection, carrying 50 A continuously at 40 °C and derating to 45 A at 70 °C. The TM240 thermal-magnetic release handles overload and short-circuit response without communication or voltage-trip options — a straightforward, non-electronic trip unit that doesn't introduce noise into the control wiring.
Rated breaking capacity hits 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that give an electrical engineer real SCCR headroom for coordinating downstream devices in a distribution panel.
The 4-pole MCCB measures 70 mm deep by 101.6 mm wide by 130 mm tall — a footprint that fits standard SENTRON panel cutouts and busbar systems.