3RU1146-4MB0 SIEMENS

The 3RU1146-4MB0 is a Siemens overload relay designed to provide comprehensive motor protection. This relay offers reliable protection against overloads, phase failures, and phase imbalances, safeguarding motors from potential damage. With a current range of 80 to 100A, it is suitable for motors of considerable size and power. The relay is classified as Size S3, indicating its physical dimensions and compatibility with specific motor starter combinations. It adheres to CLASS 10 tripping characteristics, ensuring a balance between rapid response to overloads and avoidance of nuisance tripping. Installation is simplified through direct contactor mounting, reducing wiring complexity and saving space. Main circuit connections utilize screw terminals for secure and dependable connections, while auxiliary circuits also employ screw terminals for ease of use. The relay features a manual-automatic-reset function, providing flexibility in responding to fault conditions. This overload relay is an essential component for motor protection, ensuring operational reliability and minimizing downtime.