3RB2133-4UX1 SIEMENS

The 3RB2133-4UX1 is a Siemens overload relay designed to provide comprehensive motor protection within the 12.5 to 50 A range. Classified under size S2, this relay offers adjustable tripping classes from 5 to 30, catering to a wide array of motor applications with varying starting characteristics. It is suitable for stand-alone installation, simplifying integration into existing motor control systems. The main circuit features a straight-through transformer design, enhancing current sensing accuracy. The auxiliary circuit utilizes spring-type terminals, ensuring secure and vibration-resistant connections. Users can select between manual or automatic reset modes, providing flexibility in responding to overload events. Furthermore, it incorporates internal ground fault detection, adding an extra layer of protection against insulation failures. This overload relay is a reliable solution for safeguarding motors against overloads, phase imbalances, and ground faults, thereby extending motor lifespan and minimizing downtime. Its robust design and comprehensive features make it an ideal choice for demanding industrial environments.