Breaking capacity drops to 121 kA at 415 V and 75.6 kA at 440 V, then to 17 kA at 500 V and 690 V — the same 17 kA figure at both voltages, which is unusual and worth noting if your system runs at 480/277 V or 600 V. At 690 V the 17 kA rating still covers most industrial motor branch circuits.
At 60 °C it derates to 19 A, and stays at 19 A through 70 °C. That flat derating curve simplifies panel layout — no need to oversize the frame for a warm enclosure. The 4-pole width (about 4 inches) fits standard Siemens SENTRON mounting feet.