Siemens 3VA2225-6JP32-0AH0 SENTRON MCCB, 250 A, 242 kA

The headline breaking capacity is 242 kA at 240 V AC, stepping down to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V — that 242 kA figure at 240 V tells you this breaker is sized for high-fault utility or transformer-fed secondary panels where the available fault current is extreme, not for a typical 480 V distribution board where the 187 kA at 415 V is the relevant number. The trip unit is field-configurable, but the base order code ships without auxiliary releases. Thermal derating is published across the operating range: full 250 A up to 50 °C, then 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C (–). If your panel ambient inside the enclosure hits 55 °C, you lose 12 A of headroom — plan the load accordingly.