The Siemens SENTRON 3VA2440-5KP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 400 A continuous current across its full operating temperature range of -25 °C to 70 °C, with no derating needed from 40 °C through 70 °C. It carries the ETU850 electronic trip unit for adjustable overload and short-circuit protection, including N-conductor protection configurable from OFF to 20%–160% of the phase rating.
Breaking capacity and selectivity
This MCCB delivers 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. That 187 kA at 240 V is a high-end figure for a 400 A frame — it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 9 kA at 690 V still clears most industrial motor-circuit faults. The ETU850 trip unit supports adjustable short-time delay for selective coordination downstream.
Mounting and panel fit
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard 3-pole MCCB footprint for Siemens SENTRON 3VA2 frames. The IP40 front protection means it's suited for enclosed panel mounting where splash or tool contact on the front face is the concern, not washdown. Power loss is 63.5 W maximum, so account for that heat in the enclosure thermal budget.