Its breaking capacity reaches 52.5 kA at 240 V and 32 kA at 415 V, so it clears high-fault currents without cascading upstream — critical for a main or feeder breaker in a 400 V industrial supply.
Rated current holds 40 A from 40 °C up to 50 °C, then derates to 38.4 A at 55 °C and 36 A at 70 °C. For a panel running at 50 °C ambient, you get full 40 A; above that, size the load accordingly. Maximum power loss is 10.8 W per pole — negligible for most enclosures but worth factoring into a sealed, high-density cabinet's thermal budget.
Breaking capacity is voltage-dependent: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That covers most industrial motor control centers and secondary distribution.
The supplied basic switch is 3VA10402ED320AA0.