Three-pole, rated 100 A continuous at 40 °C, it carries a 75.6 kA breaking capacity at 240 V AC — that's the fault current it can safely interrupt without welding contacts or rupturing the case.
Breaking capacity and derating — the real numbers
Breaking capacity drops with system voltage: 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 500 V and 690 V (–). If your fault current at the panel is 50 kA at 480 V, this breaker holds — at 500 V you need to check coordination. The thermal derating curve is flat to 50 °C (100 A), then drops to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C (–). Mount it in a ventilated enclosure; the 27.5 W max power loss adds heat inside the cabinet.
The trip indicator gives local mechanical flag status.
The 70 mm depth is shallower than many older MCCB designs, which helps in tight enclosures.