The Siemens SENTRON 3VA1112-4EF32-0JH0 is a 3-pole molded case circuit breaker rated 125 A continuous at 40 °C, with an interrupting capacity of 121 kA at 240 V AC. That interrupting figure drops to 75.6 kA at 415 V and 52.5 kA at 440 V — still enough headroom for most industrial service-entrance or feeder applications where fault current runs high.
Continuous current holds at 125 A from 40 °C up to 50 °C, then steps down: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Maximum power loss is 28.1 W, which matters for enclosure heat rise calculations when grouping multiple breakers.
Built-in auxiliaries and release options
The shunt trip lets a safety PLC or E-stop circuit kill power without a separate contactor; just verify the STL coil voltage matches your control supply.