The Siemens SENTRON 3VA2225-5JQ32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 250 A at 40 °C through 50 °C without derating. Above that, the thermal curve drops to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — so if this lives in a hot panel, size the load against the 70 °C figure, not the nameplate 250 A. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V.
Verify the bus-bar spacing against the 86 mm depth when routing behind the panel door. Maximum power loss is 48 W at rated current. That's moderate for a 250 A frame; account for it in the enclosure thermal calculation if the breaker is in a sealed cabinet with other heat sources.