The Siemens SENTRON 3VA1440-5MH32-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated at 400 A continuous, with a maximum breaking capacity of 187 kA at 240 VAC — that's the short-circuit current it can safely interrupt at that voltage without welding contacts or rupturing the case. At 415 VAC the interrupting rating drops to 121 kA, and at 690 VAC it's 11.9 kA, so the voltage at the fault point determines whether this breaker clears a high-fault event or needs an upstream device to take over. The 400 A rating holds from 40 °C up to 50 °C; above that it derates to 392 A at 55 °C and 367 A at 70 °C, which matters when the breaker sits in a crowded enclosure with other heat sources. This MCCB is designed specifically for starter protection — meaning it's built to coordinate with motor starters and contactors, providing both overload and short-circuit protection for motor branch circuits.
Built-in auxiliaries and releases — what's inside the case
No communication function is built in, so remote trip monitoring requires wiring the aux contacts to an I/O module.
The 3-pole design with 400 A frame means it occupies the same mounting space as other 400 A SENTRON breakers; no special adapter plate needed for a typical MCC bucket or distribution panel.