It's the Size S3 frame, which means it's sized for the larger end of the SIRIUS relay range, handling motor power up to 45 kW at 400 V rated value. That's the standard for most general-purpose motor starting — pumps, fans, compressors — where you need fast protection but enough time for the motor to accelerate past locked-rotor current.
The relay's power ratings scale with line voltage: 45 kW at 400 V, 55 kW at 500 V, and 90 kW at 690 V. At 480 V the continuous current rating is 96 A; at 600 V it's 99 A. That tells you the relay is current-limited at the lower voltages and voltage-limited at the top end. Auxiliary contact ratings cover the control circuit: 2 A at 24 V and at 230 V, 3 A at 120 V, 1 A at 400 V, and 0.75 A at 690 V. The 0.22 A at 125 V and 0.11 A at 220 V are for DC control circuits. That's enough to signal a PLC input or drop out a contactor coil, but verify your specific control voltage against the table. The relay is temperature-compensated from -40 to +60 °C, so the trip characteristic stays stable across a hot panel or a cold warehouse.
Fastening method is stand-alone installation — it mounts directly to the mounting plate, not ganged to a contactor. Main circuit terminals are screw-type, M8, accepting solid conductors 2x (2.5 to 16 mm²) and stranded 2x (6 to 16 mm²), 2x (10 to 50 mm²), or 1x (10 to 70 mm²). Auxiliary/control terminals accept 2x (0.5 to 2.5 mm²) solid or stranded. The screwdriver tip required is a 4 mm hexagon socket. Dimensions are 70 mm wide, 120 mm high, 140 mm deep — that's the envelope for panel cutout and clearance. The S3 frame is the largest of the SIRIUS relay sizes, so check your enclosure depth before committing the BOM line.
For the substance compliance documentation: the evidence lists a substance prohibitance date of 03/01/2017, which aligns with RoHS and REACH compliance timelines. The part carries the SIRIUS brand and is designed to IEC/EN 60947-4-1 standards for motor protection.