This one is in the S2 frame size, so it's built for the mid-range motor currents — not the smallest, not the largest. It's a 3-pole relay (covers three-phase motors) with screw-type terminals on both the main circuit and the auxiliary/control circuit.
This relay mounts directly to the contactor — no DIN rail needed, no extra bracket. The fastening method is "contactor mounting", so it clips onto the front of the corresponding SIRIUS contactor (typically the 3RT2 or 3RT5 series in the S2 frame). That saves panel space and keeps the wiring tidy. The dimensions are 55 mm wide, 105 mm tall, and 118 mm deep. It's not a small part — that 118 mm depth means you need clearance behind the contactor for the relay body. That gives you options in a tight enclosure. Clearance requirements: 0 mm upwards, forwards, backwards, and downwards — so it can butt up against other components in those directions. But you need 6 mm at the side for airflow and arc clearance.
Main circuit terminals accept solid wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). Stranded wire: 2x (0.75 to 25 mm²) or single 0.75 to 35 mm². That's a wide range — covers everything from control wiring up to fairly heavy motor leads. Auxiliary contact terminals take 2x (20 to 16 AWG) or 2x (18 to 14 AWG). All screw-type, so you'll need a screwdriver, not a ferrule crimper.
Relative humidity up to 100% during operation — it can handle condensation inside the panel. Shock resistance is 8g for 10 ms, which is typical for industrial control panels. It carries ATEX protection type DMT 98 ATEX G 001, so it's approved for use in potentially explosive atmospheres (gas, not dust). Surge voltage resistance rated at 6 kV.