Siemens 3TH2022-0LB4 Industrial AC Power Contactor

Siemens 3TH2022-0LB4 is a four-pole contactor relay in the Siemens 3TH2 family, configured with two normally open and two normally closed auxiliary contacts and screw-terminal wiring for DC-control circuits. It carries the 22E contact designation and is designed to EN 50011, aligning with standard industrial control interconnections. The DC-operated coil and screw-terminal construction provide a compact, robust solution for energizing and interlocking higher-power loads from a DC control source. This configuration supports feedback and sequencing in control logic, enabling reliable motor control, interlocks, and other automation tasks within a single compact device. Common applications include machine control, conveyor and material handling systems, presses, and other panels where a reliable, four-pole switching element is needed to manage both the forward/reverse or interlock signals in a DC-control scheme. The 3TH2022-0LB4 variant shares the same mechanical and electrical footprint as other 3TH2022 models, offering the same 4-pole arrangement and screw-terminal wiring for straightforward field installation and integration into existing control站 cabinets or relay racks. By combining two NO and two NC contacts in one unit, it enables straightforward wiring for logic interlocking, status feedback, and safe shutdown sequences, making it a versatile choice for controlling DC-powered loads while preserving clear, maintainable control circuitry.