The Siemens 3VA2440-5MP32-0AA0 is a SENTRON 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, rated at 400 A continuous current with no derating across the full 40 °C to 70 °C ambient range — that means the same 400 A rating holds in a hot panel or a conditioned room, no compensation factor to apply. Interrupting capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 9 kA at 690 V — the 187 kA figure at 240 V is the headline number for high-fault panelboards; the 121 kA at 415 V is what matters for most European 400 V industrial distribution. Built-in phase failure detection and communication function are onboard, so it can report status to a PLC or BMS without an add-on module.
Sizing and SCCR fit
The 400 A frame is the largest in the 3VA2 family before stepping to the 3VA3 series — verify the mounting footprint matches your existing busbar layout if swapping from a different brand. Maximum power loss of 63.5 W means ventilation in the enclosure matters at full load; the breaker itself runs warm but within spec.
Lifecycle and procurement
This is the standard catalog part for new panel builds, not a sunset line.