Siemens 3RT1024-1K Three Phase Motor Starter Contactor

Siemens 3RT1024-1K is a three-pole Sirius motor starter/contactor designed for reliable 3‑phase motor switching in industrial control panels. It is rated for AC‑3 duty at 12 A and up to 5.5 kW at 400 V, with a compact frame size of S0 and screw-terminal connections that support upright mounting for straightforward installation in enclosure‑based systems. Some variant configurations within the 3RT1024 family include a plug‑in varistor for surge protection and an auxiliary contact block (1 NO + 1 NC) to support signaling or interlocking in automation circuits. The 3RT1024 family also offers 24 V coil variants, aligning with the 24 V coil configuration of this model to enable control via standard PLC outputs and Siemens Sirius control logic. With its robust main contacts and simple wiring, this unit is suitable for switching small to medium‑sized motors, pumps, fans, or conveyors in industrial environments where reliable isolation and fast actuation are required.