The 24 VDC coil draws 3.3 W during both closing and holding, which is a steady-state load you can budget for in your 24 VDC supply — no inrush spike to size around. Spring-loaded terminals on both the main and auxiliary/control circuits accept 2x (0.25 to 2.5 mm²) solid or stranded wire, or 2x (24 to 14 AWG). That means no screw torque checks during commissioning — strip, insert, and the cage holds.
In AC-4 duty (plugging, inching, reversing), the rated operational current is 8.5 A at 400 V. That's the figure to use for frequent jogging or reversing applications — the AC-3 or AC-1 numbers aren't the limiting factor here. For type of coordination 2 (short-circuit protection with minimal damage to the contactor), Siemens specifies a gL/gG fuse of 20 A. For type 1 coordination (contactor replacement after fault), a 35 A fuse is allowed. This guides your upstream protective device selection.
That suits most industrial control cabinets without derating for typical factory floor conditions. IP20 on the front and at the terminals — finger-safe but not washdown-rated. Mount inside an enclosure if the environment sees dust or moisture.