3RB3143-4UW1 SIEMENS

The 3RB3143-4UW1 is a Siemens overload relay designed to provide comprehensive motor protection within the 12.5 to 50 Ampere range. This particular model is classified as size S3 and offers adjustable tripping classes from 5E to 30E, catering to a wide array of motor applications with varying starting characteristics. It is designed for standalone installation, simplifying the mounting process and integration into existing systems. The main circuit adopts a straight-through transformer design, facilitating easy current sensing and monitoring. The auxiliary circuit utilizes screw terminals, ensuring secure and reliable connections for control and signaling purposes. This overload relay features a manual-automatic-reset function, providing flexibility in responding to overload events and minimizing downtime. It offers reliable protection against overloads, phase failures, and locked rotor conditions, safeguarding motors from potential damage. The 3RB3143-4UW1 is an essential component for ensuring the longevity and efficient operation of electric motors in industrial environments.