It carries a continuous rating of 125 A at 40 °C, meaning it handles that load continuously without tripping — the rating that governs the main feeder or large branch circuit it protects. Rated interrupting capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — figures that tell you it can clear a bolted fault at those levels without welding contacts or rupturing the case. This is a 3-pole unit, so it switches all three phases simultaneously. The design is line protection — no ground-fault monitoring or communication module built in, just a straight thermal-magnetic trip for overcurrent and short-circuit events.
The trip indicator gives visual confirmation of a fault trip versus a manual off, which speeds troubleshooting on a down line.