3RB2143-4ED0 SIEMENS

The 3RB2143-4ED0 is a Siemens overload relay designed to provide comprehensive motor protection within a 25 to 100 Ampere range. This particular model is classified as size S3, making it suitable for a variety of motor applications. It offers adjustable tripping classes from 5 to 30, allowing users to fine-tune the protection characteristics to match specific motor and load requirements. Mounting is simplified through direct contactor mounting, saving space and reducing installation time. The main circuit connections utilize robust screw terminals, ensuring secure and reliable power connections. Auxiliary circuits benefit from spring-type terminals, which offer quick and vibration-resistant connections for signaling and control functions. This overload relay features a manual-automatic-reset function, providing flexibility in responding to fault conditions. Furthermore, it incorporates internal ground fault detection, enhancing safety and preventing potential equipment damage. The 3RB2143-4ED0 is an ideal solution for safeguarding motors against overloads, phase failures, and ground faults, ensuring operational reliability and minimizing downtime.