3RB3133-4UD0 SIEMENS

The 3RB3133-4UD0 is a Siemens overload relay designed to provide comprehensive motor protection within a range of 12.5 to 50 Amperes. This particular model is a Size S2 device, making it suitable for a variety of motor applications. It offers adjustable tripping classes from 5E to 30E, allowing users to fine-tune the protection characteristics to match specific motor requirements and prevent nuisance tripping. Mounting is simplified through direct contactor mounting. The main circuit connections utilize screw terminals for secure and reliable power transmission, while the auxiliary circuit benefits from spring-type terminals for quick and easy wiring. The relay features a manual-automatic-reset function, providing flexibility in responding to overload events. Furthermore, it incorporates internal ground fault detection, enhancing safety and preventing damage from ground faults. This overload relay is an essential component for ensuring the longevity and reliable operation of electric motors. It is designed to protect motors from thermal overload, phase failure, and ground faults.