Siemens 3TF43 22-0AK6 Three-Phase AC Contactor

Siemens 3TF43 22-0AK6 is a three-pole AC motor starter (contactor) from Siemens’ World Series, designed to energize and disconnect three-phase motors in control circuits. It uses a 110/120 V AC coil (50/60 Hz) to pull in the main contacts and is rated for AC-3 duty up to 600 V, with a continuous current rating of 22 A. The unit includes a factory-installed auxiliary contact set of 2 normally open and 2 normally closed contacts, enabling basic interlocking and control signaling without needing separate relays. In typical configurations, distributors report motor power compatibility around 7.5 HP at 230 V, 15 HP at 460 V, and 20 HP at 575 V, illustrating its suitability for moderate-load three-phase applications. The 3TF43 model is designed to be integrated into Siemens motor control systems and works with other World Series components such as overload relays and auxiliary blocks, providing a compact, reliable solution for starting and stopping three-phase motors in industrial settings.