Siemens 3RT1026-1B170 Contactor

Siemens 3RT1026-1B170 Contactor is a 3-pole SIRIUS power contactor (Size S0) with a 24 V DC control coil, designed to switch 3-phase motors in industrial control panels. It carries three main contacts rated for AC-3 duty at 25 A, delivering up to 11 kW of motor power at 400 V. The unit also includes an auxiliary contact pair (1 NO + 1 NC) for signaling or interlock tasks. The 24 V DC coil draws about 5.4 W for energizing and holding, a common spec in this family. Mounting is DIN-rail compatible (35 mm standard) with screw-terminal connections for straightforward panel wiring. Typical applications include starting and stopping medium-power motors in conveyors, pumps, fans, and machine tools, where compact size and a DC-controlled coil are advantageous. This model belongs to Siemens’ Sirius 3RT1026 series, widely used in industrial drives for reliable performance and straightforward integration into control schemes.