The headline breaking capacity is 220 kA at 240 V AC, dropping to 154 kA at 415 V and 75.6 kA at 440 V — still well above typical utility fault levels for most industrial services. That trip alarm signals on overcurrent or short-circuit trip, not just manual operation — useful for remote fault annunciation in a PLC-based distribution monitoring scheme.
Above that it derates: 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your panel ambient runs at 55 °C or higher, the breaker still carries the load but the trip curve shifts — account for the reduced headroom when coordinating with downstream protection.
Width is 76.2 mm (3 inches), depth 70 mm, height 130 mm. The 70 mm depth leaves clearance for rear busbar connections in a typical 200 mm deep enclosure.