What this 250 A MCCB delivers
The Siemens SENTRON 3VA2225-5KP32-0AH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C through 50 °C, with no derating needed across that band. Above 50 °C it steps down: 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 ambient runs hot, that 250 A nameplate drops to 200 A at the top of the operating range. Breaking capacity is 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.
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard MCCB footprint for this current class. The base switch variant is 3VA2225-5KP32-0AA0.