Its interrupting capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — meaning it can safely clear faults up to those levels depending on the system voltage, which is the spec that decides whether it holds coordination with upstream gear.
Rated 400 A continuous up to 50 °C ambient. Above that it derates: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. Maximum power loss is 96 W, which adds to the enclosure heat budget. Factor that into your thermal calculation if the breaker is in a sealed cabinet.
That depth is the body depth behind the panel face — check your gland plate clearance and door swing before cutting the mounting hole. The storage range is wider because it's not dissipating heat when shelved.