Siemens 3TA2111-R Contactor

Siemens 3TA2111-R Contactor, supplied with the 3UA4101-OD auxiliary block, is a three‑pole power switch rated for 575 VAC and 30 A, designed to control three‑phase loads in industrial control applications. This Siemens 3TA device is intended for switching medium to heavy three‑phase motors, pumps, and fans in equipment such as conveyors, HVAC systems, and manufacturing lines, providing a compact solution for reliable load control in control panels. The included 3UA4101-OD auxiliary contact block expands signaling and interlocking options within a control circuit, enabling status feedback to controllers or interlocks with other devices without altering the main power path. By combining the 3TA2111-R with the auxiliary accessory, technicians can achieve coordinated control in standard automation architectures while maintaining a clear separation between main power switching and control signaling. This configuration is representative of Siemens’ approach to modular contactors, where a robust 575 VAC, 30 A rating supports a wide range of three‑phase loads, and the auxiliary block adds practical signaling capability for PLCs, indicators, and safety interlocks within industrial control schemes.