Siemens 3Tf2222-0Bb4 Industrial Control Relay

Siemens 3TF2222-0BB4 Contactor, Size 00, is a compact three-pole device designed for AC-3 motor control duties in industrial environments. This 3-pole contactor features a 24 V DC coil and screw-terminal connections for robust, straightforward wiring in control panels. It is rated for AC-3 service with a 4 kW load at 400 V, making it suitable for starting and running small to mid-size three-phase motors, pumps, conveyors, and fans within automation equipment. The unit includes an auxiliary contact block (22E) providing two normally open and two normally closed contacts, enabling interlocking, feedback, or status signaling inside control circuits without needing a separate relay. Its mounting footprint is 45 mm wide, allowing compact installation alongside other control devices in a standard Siemens or compatible panel. The 3TF2222-0BB4 is a genuine Siemens part, ensuring consistent performance with other components in the same family and easy integration into Siemens automation ecosystems. Its screw-terminal design ensures reliable terminal retention and straightforward field wiring, while the 3-pole configuration handles switching of all three phases of the load. This combination of compact size, robust AC-3 rating, and versatile auxiliary contacts makes it a practical choice for panel builders and machine designers seeking dependable motor control with integrated signaling.