What this MCCB carries on the nameplate
The Siemens SENTRON 3VA2440-6HN32-0BH0 is a 3-pole molded case circuit breaker rated for 400 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm panel. Breaking capacity hits 242 kA at 240 V AC, drops to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 9 kA at 690 V.
The 138 mm width for a 3-pole frame is typical for this class; check your existing busbar or lug kit spacing. No communication module onboard (no Modbus, no PROFIBUS), so trip status comes through the auxiliary switch wiring only. The undervoltage release (UVR) will trip the breaker if control voltage drops — plan the control power supply accordingly.
At 415 V it's still 187 kA — that's enough for most industrial distribution boards downstream of a transformer. The 400 A continuous rating is flat across the 40-70 °C range, which is unusual — most MCCBs derate above 40 °C. That means you can load it to 400 A even in a hot enclosure without recalculating.