What this MCCB delivers
The SENTRON 3VA1225-6GF42-0DB0 is a 4-pole molded case circuit breaker rated at 250 A continuous, with a robust interrupting capacity that scales with system voltage — 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. Thermal derating is mild up to 50 °C — still 250 A — then drops to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.
The 4-pole design covers three-phase plus neutral, common for main disconnects or feeder breakers in North American and European distribution panels. That covers most indoor and sheltered outdoor enclosures.