What the ratings mean for fit
The Siemens SENTRON 3VA2225-6HL32-0DL0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, and it holds that full rating through 50 °C before it begins to derate — at 55 °C it carries 241 A, at 60 °C it carries 232 A, at 65 °C it carries 222 A, and at 70 °C it carries 213 A. That means for a panel running at 50 °C ambient, you get the full 250 A without oversizing the frame; above that, the thermal curve governs the real load you can protect. The interrupting ratings are what decide whether this breaker clears a fault without cascading upstream: 242 kA at 240 V, 187 kA at 415 V and at 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. At 690 V the 4.5 kA figure is a hard limit — if your fault current at that voltage exceeds it, you need a higher-rated frame or a current-limiting upstream device.
Deployment context
This MCCB is designed for line protection in distribution panels, with a footprint of 105 mm wide by 181 mm tall by 86 mm deep — standard for a 250 A frame that mounts on a DIN rail or panel plate. The built-in undervoltage release (UVR) and the auxiliary switch configuration (2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ) mean it can be wired into a safety circuit that drops the breaker on loss of control voltage, and the trip indicator gives a local visual flag for maintenance rounds.