The Siemens SENTRON 3VA2440-5HN32-0CH0 is a 3-pole molded case circuit breaker rated for 400 A continuous at 40 °C through 70 °C — no derating needed across that full ambient span, which simplifies panel design in warm enclosures or near heat sources. Interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V — figures that cover most industrial service-entrance and distribution applications, though the 690 V number means this frame is not a primary choice for 690 V switchgear.
Maximum power loss is 66 W; account for that in enclosure thermal calculations if the breaker is in a sealed, non-ventilated cabinet alongside other heat sources.