The key motor ratings: 18.5 kW at 400 V in AC-2 duty, 22 kW at 500 V, and 11.4 kW at 690 V. AC-2 covers slip-ring motor starting and plugging — the contactor sees higher switching stress than AC-3, so the rating is lower than a straight AC-3 figure would be. For resistive loads at 400 V, it handles 3 A; at 230 V, 6 A. The coil is 42 V, 50/60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz. Switching rates vary by duty: 1200 cycles/hour at AC-1, 600 at AC-2, 1000 at AC-3, and 300 at AC-4 — the buyer should match the rate to the actual load profile, not the highest number.
The 3RT1035-1AD24 is 55 mm wide, 112 mm high, and 164 mm deep. For the main circuit, screw terminals accept solid wire 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²). The auxiliary contacts have their own ratings: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. These numbers matter when coordinating with upstream protection — the arcing time tells you how long the fault current flows before the contactor clears. Rated for 50 and 60 Hz systems.