Siemens 3RT1017-1AF01 is a 3-pole power contactor in the SIRIUS family designed for AC-3 motor control with a 110 V AC control coil. The unit provides three main normally open contacts for the load circuit and four normally open auxiliary contacts, all housed in a compact S00 frame with screw terminals and IP20 front protection. Coil voltage is 110 VAC (50/60 Hz), and it is rated for up to 5.5 kW at 400 V in AC-3 service. Mechanical life is specified at tens of millions of cycles, underscoring its durability for frequent switching. It is commonly used to start and stop motors in automation applications such as conveyors, presses, and general machine control.
