Breaking capacity varies sharply with system voltage: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA figure at 240 V means it handles high-fault-current utility feeds without cascading upstream; the drop to 17 kA at 690 V tells you this breaker is sized for 480 V-class systems, not 690 V industrial mains.
At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If your panel internal temperature runs above 50 °C, the breaker still delivers 96-98 A — not a hard limit for most 100 A feeder circuits, but worth confirming against the connected load's actual draw.
The 4-inch width (101.6 mm) matches standard MCCB panel cutouts for a 4-pole frame. Optional motor drive available for remote tripping or re-closing schemes.