Siemens SIRIUS 3RT2028-1AL24-3MA0 — Size S0 Power Contactor, DIN-Rail Mount
It is a current-production part (lifecycle stage: current). The contactor measures 85 mm high by 45 mm wide by 141 mm deep, with a mounting position that allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward.
Switching Performance and Contact Configuration
Main contacts are configured as 16... 8 (NO/NC). No auxiliary switch is fitted on this variant — auxiliary contacts must be added separately if needed. Maximum switching frequency varies by duty: 1 000 1/h at AC-1, 750 1/h at AC-2, AC-3, and AC-3e, and 250 1/h at AC-4. Arcing time is 10... 10 ms; at AC 4... 16 ms.
Auxiliary Contact Ratings and Wiring
Auxiliary contact ratings are specified across multiple voltages: 6 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. At 230 V the rating is 5 hp. The magnet coil uses screw-type terminals. Main circuit wiring accepts solid or stranded conductors from 1 to 10 mm²; auxiliary circuits accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²).