The Siemens SENTRON 3VA2340-5HL32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C, with an ETU320 electronic trip unit configured for line protection. That 400 A holds flat through 50 °C — at 55 °C it derates to 385 A, at 70 °C to 340 A, so the real-world ampacity depends on your enclosure ambient. The breaking capacity is the headline number: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 17 kA at 690 V.
Integration and footprint
The ETU320 is a basic electronic trip unit with LSI protection curves (long-time, short-time, instantaneous); no communication module or ground-fault detection on this variant, so if you need Modbus or ground-fault monitoring, you'd step up to the ETU350 or ETU600 variants in the same frame.