The Siemens SIRIUS 3RT2024-1AC20-1AA0 is an S0-frame power contactor sized for a 45 mm wide DIN-rail footprint, mounting via screw or snap-on onto 35 mm rail per DIN EN 60715. Standing on a horizontal mounting surface, it draws 0.25 A at 50 Hz and 0.28 A at 60 Hz for the magnet coil, which uses screw-type terminals. The contactor includes an auxiliary switch and is rated for AC-3 switching at up to 1000 operations per hour, with AC-4 limited to 300 1/h. Mechanical life is typical 10,000,000 cycles.
At 230 V the contactor handles 2 hp motor loads; at 400 V it switches 3 A. The AC-3 rating of 1000 1/h covers typical motor starting duty — the contactor can cycle a conveyor or pump motor once per 3.6 seconds continuously. AC-4 at 300 1/h handles plugging or inching duty, but at a lower rate. The S0 frame and 45 mm width mean it fits standard 8-inch deep enclosures with 10 mm clearance needed above, below, and forward, and 6 mm at the sides.
Mounting position is standing on a horizontal surface. Clearances: 10 mm upwards, downwards, and forwards; 6 mm at the sides.