The 154 mm depth and 45 mm width mean it occupies one standard S0 slot in a panel — no extra side clearance needed beyond the 6 mm at the side and 10 mm fore/aft/up/down called out for ventilation.
The main contacts carry 18 A as the minimum rated operational current and 8 A as the maximum under AC-3 duty — that's the motor-switching curve, so it handles a 4 kW three-phase motor at 400 V without derating. The coil holds at 24 VDC nominal and draws 6 A at rated value; the drop-out threshold is 0.8 x rated voltage, so below about 19.2 V the contactor drops cleanly. Switching frequency hits 1 000 cycles per hour under AC-1, AC-2, AC-3, and AC-3e loads, and 300 cycles per hour under the heavier AC-4 duty (plugging/reversing). Arcing time runs 10 to 10 ms — tight enough for coordinated short-circuit protection with a gG fuse or circuit breaker sized to the load.