Siemens 3TD43 22-7E 2S2O 2NO2NC Reversing Contactor

The Siemens 3TD43 22-7E 2S2O 2NO2NC reversing contactor is a three‑pole motor control device designed to swap motor direction in forward/reverse applications within three‑phase circuits. It is coil‑driven by 110/120 VAC, enabling straightforward integration with standard control panels and relay logic. The unit includes two normally open and two normally closed auxiliary contacts (2NO2NC), providing signaling and interlock capability separate from the main power contacts. As a reversing contactor, it is used to energize opposite winding configurations to change rotation without manual rewiring, making it suitable for equipment such as conveyors, hoists, and machine tools where reversible operation is required. The 22‑7E designation identifies this specific coil/auxiliary configuration within the 3TD43 family, delivering Siemens build quality and compatibility with common control hardware while requiring appropriate interlocking and safety practices to avoid simultaneous energization of opposing paths.