It carries screw-type terminals on the main circuit and is rated for 37 kW at 500 V AC-3, with a secondary rating of 18.6 kW at 690 V AC-3. The S3 size means a 70 mm width and 146 mm height, with a depth of 188 mm — a common footprint for 30–40 kW contactor duty.
The 37 kW at 500 V AC-3 rating is the motor-switching capability — that's the current you size the overload relay and cable for. At 690 V the same contactor handles 18.6 kW, so if your line runs 690 V motors you still have a valid rating, just at lower power. The contactor is rated for side-by-side mounting without derating, which saves panel width when you need multiple contactors in a row. Front IP20 with the cover fitted; the terminal area is IP00. That means the contactor body is touch-safe once the cover is on, but the wiring compartment is open — standard for panel-mount contactors.
We source this part to order against an RFQ. If you need a cross-reference for a BOM line that was specified around a different SIRIUS contactor, the 3RT1044-1FB46 is the closest functional peer — same S3 frame, same AC-3 power ratings, but with spring-type terminals instead of screw.