The interrupting ratings are 75.6 kA at 240 V, 52.5 kA at 415 V, and 11.9 kA at 690 V, so it handles high fault currents on 400 V class systems without cascading upstream. The supplied basic switch is order code 3VA11403EF360AA0.
The 3-pole width (76.2 mm) is a common 3-module form factor, so it slots into a standard distribution board without extra adapters.
Thermal derating and power loss
Rated current holds at 40 A from 40 °C up to 50 °C, then derates to 39 A at 55–60 °C and 38 A at 65 °C, and 37 A at 70 °C. Maximum power loss is 10.8 W. If the breaker is enclosed in a small, uncooled panel, account for the derating above 50 °C to avoid nuisance tripping.