The SENTRON 3VA2225-6HN32-0KL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a maximum interrupting capacity of 242 kA at 240 V AC.
Interrupting capacity and thermal derating
At 415 V and 440 V the breaker holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V — the steep roll-off above 500 V means this frame is sized for low-voltage distribution, not 690 V motor circuits. Thermal derating begins at 55 °C: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C.
Maximum power loss is 48 W, so account for that heat in enclosure sizing if the breaker is enclosed with other high-current devices.