The Siemens SENTRON 3VA2325-5HL32-0KH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting. Its interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 500 V; at 690 V it still holds 7.5 kA.
The shunt trip and auxiliary switch wiring exits through the front face, so leave clearance for the cable bend radius. Maximum power dissipation is 37.5 W at full load — account for that heat in the enclosure ventilation, especially if multiple breakers are ganged.