The Siemens SENTRON 3VA2225-6KP32-0AJ0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a breaking capacity of 242 kA at 240 V AC and 187 kA at 415 V AC — enough to handle high-fault utility feeds or large motor branch circuits without cascading upstream. It holds the full 250 A rating up to 50 °C ambient; above that it derates to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — so if your panel runs hot, size the load accordingly.
The 3-pole footprint matches the 3VA family, so it drops into existing mounting rails without re-drilling. Maximum power loss is 48 W — account for that heat in your enclosure ventilation calculation, especially if the breaker is fully loaded at 250 A in a sealed cabinet.