The Siemens SENTRON 3VA2340-5HL32-0HC0 is a 3-pole molded case circuit breaker rated for 400 A continuous at 40 °C, with a breaking capacity of 187 kA at 240 V AC. At 415 V and 440 V it still holds 121 kA, and at 500 V it's 75.6 kA. This is a line-protection device — meaning it's designed for feeder and main breaker duty, not motor branch-circuit protection. The continuous 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 max power loss is 96 W — account for that in your panel thermal budget if the breaker is enclosed in a small cabinet with other heat sources.
Built-in accessories and what they do for commissioning
No undervoltage release is fitted; if you need UVR protection, that's a different variant. The breaker has a voltage trigger (shunt trip) but no trip indicator and no communication function. It's a standalone device — no Modbus or PROFIBUS module inside. For remote monitoring you'd add an external I/O block reading the auxiliary contacts.
That's a standard SENTRON 3VA2 frame size.