What the 250 A continuous rating means for your panel
That 250 A holds steady all the way up to 50 °C — only starts to taper above 55 °C, where it drops to 241 A, then 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Breaking capacity is 242 kA at 240 V AC and 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 4.5 kA at 690 V. The 4.5 kA at 690 V tells you this breaker is at home on 400 V class systems, not 690 V drives.
Ground-fault monitoring built in
This version includes summation-current ground-fault monitoring on the L + N conductors. That means it measures the vector sum of phase and neutral currents — catches ground faults without needing a separate core-balance CT or external relay. It's a line-protection design, not a motor-protection or generator breaker, so the trip curve is shaped for cable and busbar protection.
That's a standard SENTRON 3VA frame footprint — fits existing 3VA panel layouts and busbar systems.