What this breaker does on a motor circuit
The Siemens 3VA2440-5MP32-0AF0 is a 3-pole IEC frame 630 motor protection circuit breaker rated 400 A continuous, with a breaking capacity of 55 kA at 415 V (class M). That 55 kA interrupting rating means it can safely clear a bolted fault on a 415 V line without upstream fuses or a larger breaker — it's sized for high-fault-capacity industrial distribution, not light commercial panels. The ETU550M electronic trip unit gives you LSI protection: long-time (overload) adjustable from 160 A to 400 A, short-time (short-circuit) from 1.2x to 15x In, and instantaneous from 3x to 15x In. That range covers most medium motor loads — pumps, conveyors, compressors — where you need thermal memory and selective coordination downstream.
What's on the nameplate
Built into the 3VA2 IEC frame 630 platform with busbar connection. Includes one auxiliary switch changeover (H) and one trip alarm switch changeover — enough for a remote status and fault indication back to a PLC or annunciator panel.