It occupies a single modular width of 18 mm, fitting tightly into a crowded panel without wasting rail space. Rated current holds at 40 A up to 40 °C ambient; at 60 °C it derates to 35.2 A — a useful curve to check if the breaker sits near heat sources inside the enclosure.
Snaps onto a standard mounting rail in any position. Depth is 70 mm, so it clears most shallow enclosures; the 90 mm height and 18 mm width leave room for wiring ducts alongside. IP20 with connected conductors; IP40 in the handle range.
Vibration resistance is 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz (4 sec) — the spectrum doesn't lie, and this breaker holds up under moderate machine vibration without nuisance trips.