Siemens 3RT1024-1AG20 4P AC Contactor Relay 400V

Siemens 3RT1024-1AG20 is a 3-pole Sirius power contactor designed for AC-3 motor starting, rated at 5.5 kW at 400 V with a 110 V AC coil. It carries a nominal AC-3 current of 12 A and operates at 50/60 Hz, packaged in the compact Size S0 form factor with screw-terminal connections for straightforward field wiring. This 3-pole device is intended to switch three-phase motors and other AC loads in industrial automation, providing reliable isolation and switching in panel-mounted control circuits. The model specifies AC-3 duty, three poles, and a 110 V coil, and Siemens notes this part as phased-out, with the recommended successor being 3RT2024-1AG20. Front protection is listed as IP20 while the terminals are IP00, aligning with common enclosure-based installations. Typical applications include starting and stopping small to medium three-phase motors in conveyors, pumps, fans, and other automation lines where a 110 V control circuit is employed.