The Siemens SIRIUS 3RT1034-1AL24-ZW96 is a Size S2 power contactor with screw-type main terminals, rated for motor switching at 18.5 kW at 500 V AC-2 and 15 kW at 400 V AC-2. It mounts on a 35 mm DIN rail per EN 50022, either snapped on or screwed, and supports side-by-side mounting for panel density. The contactor's front face carries IP20 protection; the terminal area is IP00, so the wiring zone expects enclosure protection from the panel. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.
Wire sizing: solid conductors accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), max 2x (0.75...4 mm²); stranded accepts 2x (0.75...25 mm²) for the main circuit. The auxiliary contact block (24 V rated 10 A, 60 V rated 2 A, 110 V rated 1 A, 220 V rated 0.3 A, 230 V rated 6 A, 400 V rated 3 A) shares the same screw-terminal cage. Mechanical life is typical 10 million operations. Switching frequency limits: AC-1 maximum 1 200 cycles/h, AC-2 maximum 750 cycles/h, AC-3 maximum 1 000 cycles/h, AC-4 maximum 250 cycles/h. Arcing time is 10...15 ms; operate time at AC is 7...20 ms. Rated control supply voltage at 50 Hz is 0.8...1.1 × Us, at 60 Hz 0.85...1.1 × Us.