SIRIUS S0 power contactor — 3RT2028-2AL20-1AA0
It carries a 5 hp motor rating at 230 V and is rated for AC-3 switching at up to 750 operating cycles per hour.
At 45 mm wide, 102 mm tall, and 97 mm deep, this S0-frame contactor fits standard 45 mm-wide DIN-rail slots. Mounting position is standing on a horizontal surface.
The auxiliary contact block (18...8 configuration — 1 N/O + 1 N/C) accepts 2x (0.5 to 2.5 mm²) solid or stranded. Coil connection uses spring-type terminals — no screw torque to verify, just strip and push.
Auxiliary switch is rated for switching: 10 A at 24 V, 2 A at 48 V, 2 A at 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 the make/break capacities for the built-in auxiliary contacts.
Operating conditions and life
Maximum switching frequency varies by duty: 1000 cycles/h for AC-1 (resistive), 750 cycles/h for AC-2 and AC-3 (motor starting), 250 cycles/h for AC-4 (plugging/inching). Coil power consumption is 0.25 VA at 50 Hz, 0.28 VA at 60 Hz. Operating times: 4 to 16 ms at AC, arcing time 10 ms.