Siemens 3RT1054-1AF36 Three Phase AC Contactor

Siem ens 3RT1054-1AF36 SIRIUS three‑pole power contactor is designed for AC‑3e motor control duty, delivering up to 115 A in the main circuit and 55 kW at 400 V with a 50/60 Hz supply. It carries a coil that accepts 110 V AC or 127 V DC (coil range 110–127 V), and provides four auxiliary contacts (2 normally open and 2 normally closed) for interlocking and control wiring. The main circuit terminals are box type, while the control and auxiliary circuits terminate on screw terminals for flexible panel wiring. Its footprint measures roughly 172 mm high by 120 mm wide by 170 mm deep, and it is categorized as Siemens Sirius size S6. Typical applications include starting and stopping large motors in pumps, conveyors, compressors, and HVAC fans in industrial environments.