The 45 mm width means it occupies one standard 45 mm module slot — plan your gland plate fill factor accordingly. Depth is 97 mm, so a 120 mm deep enclosure leaves 23 mm clearance behind the door for wiring. Clearance requirements: 50 mm above and below, 30 mm to the side, zero forward or backward. Any mounting position is allowed, so vertical or horizontal rail orientation is fine as long as those clearances are respected.
Trip Class 10 means the bimetal overload releases within 10 seconds at 7.2× the thermal setting — standard for general-purpose motor starting where the acceleration time is under 10 seconds. For longer ramp times (centrifuges, high-inertia loads), you'd step up to Class 20 or 30. The 100 kA breaking capacity at 400 V and 500 V covers most industrial service-entrance fault levels; at 690 V it drops to 4 kA, so verify the available fault current on 690 V systems. The 15 operations per hour maximum at AC-3 and AC-3e is the switching frequency limit — fine for a conveyor start/stop cycle, not for a jogging application.