The Siemens SENTRON 3VA1112-4EF36-0BA0 is a 3-pole molded case circuit breaker rated for 125 A continuous current (Iu) at up to 50 °C ambient, with a TM240 thermal-magnetic overcurrent release. The interrupting ratings are 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V, so it handles high-fault utility feeds without cascading upstream. The 70 mm depth and 76.2 mm width fit standard Siemens 3VA panel footprints; the undervoltage release (UVR) is integrated, and the auxiliary trip accessory (3VA9608-0BB11) can be added for shunt-trip or remote-trip applications.
Above that, it derates: 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C.
What's not on this breaker
No trip indicator, no voltage-trip function, no communication module, no phase-failure detection, no ground-fault monitoring, and no auxiliary contact built in. The undervoltage release is the only integrated auxiliary. If you need remote status or shunt-trip capability, the separate 3VA9608-0BB11 auxiliary trip must be ordered alongside.