Siemens 3TB41 17-0B Three-Phase Motor Starter Contactor

Siemens 3TB41 17-0B is a three-pole motor starter contactor rated for 18 A at up to 600 VAC, designed for direct switching of three-phase motors in industrial control panels. As a member of Siemens’ 3TB contactor family, it provides four auxiliary contacts—two normally open and two normally closed—to support interlocking and signaling within the control circuit. This motor starter is listed for IEC 158 and is intended for AC-3 duty in motor circuits up to 600 VAC, making it suitable for panel-mounted control of machines such as conveyors, pumps, and fans where compact, integrated switching is desirable. By combining the main power contacts with multiple auxiliary contacts in one compact unit, the 3TB41 17-0B helps simplify wiring and reduce panel space while maintaining compatibility with standard Siemens control gear in industrial automation setups.