At 230 V it carries 7.5 hp, which is the typical rating for a moderate pump or fan motor on a 230 V three-phase supply. Switching frequency varies by duty: 1 200 cycles/hour for AC-1 resistive loads, 1 000 for AC-3 motor duty, and 300 for AC-4 (plugging/reversing). If your application involves frequent jogging or reversing, the AC-4 limit is the one that governs contact life — plan around 300 ops/hour max.
Dimensions: 114 mm high, 55 mm wide, 130 mm deep. The S2 frame size is the mid-range in the SIRIUS contactor family — larger than the S0 (3RT2015/3RT2016) but smaller than the S3. That 6 mm side gap is tighter than the vertical clearances, so when ganging contactors side-by-side on DIN rail, maintain that minimum for arc-flash venting and heat dissipation.
DC switching capability — not just an AC contactor
While primarily an AC motor contactor, the 3RT2035-3AL20-1AA0 carries DC switching ratings that make it usable for DC load circuits in the same panel: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, and 0.6 A at 440 V (–). These are resistive DC ratings — inductive DC loads (relays, solenoids) need a diode or RC snubber across the load to avoid contact welding.