The Siemens SENTRON 3VA2225-6KP32-0DH0 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 and 187 kA at 415 V. That kind of short-circuit rating means it can sit upstream of a whole subpanel or a big motor control center and still clear a bolted fault without the main breaker tripping — selectivity stays intact.
Real-world interrupting and thermal performance
At 500 V the breaker still interrupts 121 kA, and at 690 V it drops to 4.5 kA — that's the arc-extinction limit at higher voltage, so if you're on a 690 V system, you need to verify the available fault current stays under that number. The continuous current derates as the ambient rises: 250 A holds steady up to 50 °C, then steps down to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. In a tightly packed panel, you'll want to account for that in your thermal budget, especially if the breaker is running near its 70 °C operating limit.
The auxiliary switch block includes 2 auxiliary switches plus a trip alarm switch (HQ), and the undervoltage release is built in. No ground-fault monitoring on this version.