The Siemens SENTRON 3VA2340-6HL32-0DA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a maximum breaking capacity of 242 kA at 240 V and 187 kA at 415 V. At 690 V the breaking capacity drops to 7.5 kA, so keep that in mind if your line runs at higher voltage. 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. This is a straight line-protection breaker, not a multifunction unit.
The 110 mm depth means it clears shallow backpanels without a gland-plate extension. No DIN-rail mount; this is a bolt-on frame for fixed or draw-out chassis. Power loss at full rated current is 98.5 W — account for that in enclosure thermal calculations, especially if the panel is sealed or has limited ventilation.