The Siemens SENTRON 3VA2340-5HN42-0KC0 is a 4-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with the ETU350 electronic trip unit handling overcurrent protection. At 415 V and 440 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 7.5 kA at 690 V, so the voltage class drives the real SCCR headroom you design around. Rated current holds flat at 400 A from 40 °C through 50 °C, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C.
The breaker measures 184 mm wide, 248 mm high, and 110 mm deep. That 184 mm width for a 4-pole frame is standard for SENTRON 3VA2 breakers — it'll drop into existing panel layouts designed for that footprint. No communication function onboard; this is a standalone protection device, not a networked power monitor.