3RB3123-4SB0 SIEMENS

The 3RB3123-4SB0 is a Siemens overload relay designed to provide comprehensive motor protection within a range of 3 to 12 Amperes. This particular model is a Size S0 device, making it suitable for integration with similarly sized contactors. It offers adjustable tripping classes from 5 to 30, allowing users to fine-tune the relay's response to overloads based on the specific application requirements. Mounting is simplified through direct contactor mounting, reducing installation time and complexity. The main circuit connections utilize screw terminals for secure and reliable power connections, while the auxiliary circuit also employs screw terminals for control and signaling purposes. Users can select between manual, automatic, or remote reset options, enhancing operational flexibility. Furthermore, the relay incorporates internal ground fault detection, adding an extra layer of protection against insulation failures. This overload relay is engineered to safeguard motors from thermal overload, phase failure, and ground faults, ensuring prolonged motor lifespan and minimizing downtime. It adheres to industry standards for motor protection, providing a dependable solution for various industrial applications.