The coil pulls in on 110 V AC at 50 Hz or 60 Hz, with a spring-type terminal block on the coil side that accepts 2x (0.5... 2.5 mm²) solid or stranded wire — no ring lugs needed, which saves time on the wireman's bench. Size S0 is the mid-range footprint in the SIRIUS family: 60 mm wide, 102 mm tall, 97 mm deep.
Mounting position is standing on a horizontal surface. The main contact terminals accept 1... 10 mm² stranded wire; the auxiliary and coil terminals take 2x (0.5... 2.5 mm²) solid or stranded. That's enough for most motor branch circuits up through the contactor's rating, but if you're paralleling feeds you'll want to land a single larger conductor rather than double up.
The auxiliary contact block carries a full set of switched-current ratings across common control voltages. At 24 V AC it's rated 10 A; at 230 V AC it's still 10 A; at 400 V AC it drops to 3 A. That tells you the contact set is designed for general-purpose pilot duty, not for switching heavy motor loads directly — it's the signal side, not the power side.