Siemens 3TF4010-0BB4 Contactor

Siemens 3TF4010-0BB4 Contactor is a size 0, three‑pole motor-controlling device designed for AC‑3 duty. It is rated to switch loads up to 4 kW at 400/380 V three‑phase, making it suitable for small to mid‑size motors in applications such as conveyors, pumps, and fans in industrial automation. The coil is a DC 24 V solenoid system, enabling control from standard low‑voltage control circuits. This unit includes one auxiliary contact (normally open) to support control signaling or interlock logic alongside the three main contacts used to switch the motor load. As part of Siemens’ 3TF family, the 3TF4010‑0BB4 provides a compact, robust solution for reliable motor starting and stopping in environments where straightforward wiring and quick integration with existing Siemens control gear are advantageous. The 400/380 V rating aligns with common European and regional industrial power systems, while the AC‑3 rating reflects typical starting and running of motors within the specified power range. This cont actor is positioned for easy incorporation into simple control schemes that require a dedicated motor switch with a built‑in auxiliary contact for feedback or sequencing tasks, helping engineers implement clear, dependable control logic in automation panels.