SIRIUS 3RT1045-1AU00 — Power Contactor, Size S3
For AC-3 squirrel-cage motor switching, the 500 V rating is 45 kW, and at 690 V it is 21.1 kW. The contactor mounts on 35 mm or 75 mm DIN rail via screw and snap-on fastening. Side-by-side mounting is permitted, which simplifies panel layout for multi-contactor groups. The enclosure provides IP20 on the front with the cover or box terminal fitted; the terminal area itself is IP00, so it expects a panel environment where the busbars and wiring are behind a deadfront.
The AC-4 rating of 66 A at 400 V covers plugging and inching, where the contactor breaks full motor current. The AC-3 rating at 500 V is 45 kW, suitable for standard squirrel-cage motors on pumps or fans. The coil is rated for 50 Hz at 240 V, with an operating range of 0.8 to 1.1 times the rated voltage. The auxiliary contact ratings are: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V. These are the switching capacities for the built-in auxiliary contacts, not the main poles.
Wiring and Terminal Data
Solid wire connections: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded wire: 2x (10 to 50 mm²). For the auxiliary and control circuit, solid or stranded wire: 2x (2.5 to 16 mm²).