Three-pole, line-protection version — meaning it's the primary feeder breaker for a distribution panel, motor control center, or heavy industrial load center, not a downstream branch device.
What the interrupting ratings mean for fit
This breaker delivers 242 kA interrupting capacity at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. If your service entrance or sub-feed has a calculated short-circuit duty of, say, 150 kA at 480 V, this breaker covers it.
The 250 A rating holds flat from 40 °C to 50 °C, then steps down: 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, 225 A at 70 °C. Mechanical endurance rated at 15 000 operations.