Siemens 3TB40 17-0A Contactor

Siemens 3TB40 17-0A Contactor is a compact three‑pole AC motor starter from the Siemens 3TB family, designed to safely switch motors and other inductive loads in automation panels. It uses a 115V AC coil rated for 50/60 Hz operation, enabling direct interfacing with standard control circuits and protective devices. The 17-0A designation identifies the 115V control‑coil variant within this line, offering compatibility with common plant control schematics that rely on 115 VAC control signals. Built for reliability in industrial environments, the 3TB40 family is designed for controlling motors in equipment such as conveyors, pumps, and fans, with Siemens accessories available for expanding the starter to match specific control schemes (auxiliary contacts, interlocks, and mounting options) as needed in panel installations. This contactor is intended for typical 50/60 Hz operation in industrial control panels, pairing with other Siemens control components to deliver a cohesive motor control solution.