Rated continuous current is 40 A at 40 °C, with an adjustable thermal-magnetic trip range from 60 A minimum to 480 A maximum — so it protects feeders and branch circuits where the load current stays under 40 A but the fault-clearing requirement is high. The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V — this breaker is sized for high-fault-current installations where upstream transformer capacity is large.
The 1.2 W maximum power loss is negligible for panel thermal budgeting.