Siemens SIRIUS 3RT1046-3AN20 — Power Contactor, Size S3
Rated operational current for AC-3 duty is the key selection figure: at 400 V it carries 3 A, at 690 V it carries 25.4 kW. The mechanical life is typical 10,000,000 operations, and the maximum switching rate varies by duty — 850 cycles per hour in AC-3, 250 in AC-4. These ratings define the motor load it can handle in a standard industrial control panel.
Mounts on 35 mm or 75 mm DIN rail with screw or snap-on fastening. Main circuit wiring accepts solid conductors 2x (0.25 to 2.5 mm²) or stranded 2x (10 to 50 mm²). The screw terminals are IP00 at the connection point, while the front face with cover/box terminal achieves IP20 — adequate for finger-safe touch protection inside an enclosed panel.
Duty Cycle and Thermal Limits
Maximum switching rates: 900 cycles/hour in AC-1 (resistive), 850 in AC-3 (motor starting), 350 in AC-2, and 250 in AC-4 (plugging/inching). Rated control supply voltage is 220 V at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated at 50 Hz and 0.85 to 1.1 at 60 Hz. The contactor draws 37 W at 1000 V rated value. Coil ratings for DC control: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V.