What this 3VA2 MCCB carries
The Siemens SENTRON 3VA2340-5HN32-0JL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current — no derating needed up to 50 °C, where it still holds the full 400 A. Above that, it steps down in 15 °C increments: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. That thermal curve is what you use for panel sizing, not the nameplate number. Interrupting capacity runs 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 7.5 kA at 690 V.
It's a standard SENTRON 3VA2 footprint, so if you've got a 3VA2 frame in the panel already, this drops into the same mounting pattern.
As a SENTRON 3VA2 series MCCB, it carries the usual Siemens compliance package — UL 489, IEC 60947-2, CSA C22.2 No. 5. RoHS and REACH declarations are available with the product documentation. The basic switch variant is 3VA2340-5HN32-0AA0 if you need the core breaker without the auxiliary switch package.