At 120 mm wide and 172 mm tall, it takes up a standard S6 footprint on the gland plate. The 170 mm depth means you need that clearance behind the door for the arc chamber and main pole connections.
The coil pulls in at 0.8 of rated voltage and holds with a 1.1 full-scale factor, so on a 110 VAC control bus it picks up cleanly at 88 V and stays sealed through 121 V. The MTBF is listed at 75 a — that is a mean time between failures of 75 years under stated conditions, a reliability figure that supports long-life BOM planning. For load wiring, the main poles accept stranded cable from 25 to 120 mm², sized for the full current capability of the S6 frame. Auxiliary contacts are present, so you can wire status feedback without an add-on block.
Screw fixing on a vertical surface is standard. The coil terminals are screw-type, which a panel wireman can torque to a known value — no spring clips to second-guess. If you are packing multiple S6 contactors side by side, that 10 mm side gap is the minimum for heat dissipation and arc clearance. The main power connections accept stranded 25-120 mm²; auxiliary wiring takes 0.5-1.5 mm² solid or stranded, with a maximum of 4 mm² on the larger terminals. Wire it with ferrules for a clean termination.