3RB3143-4UD0 SIEMENS

The 3RB3143-4UD0 is an overload relay designed by Siemens for comprehensive motor protection. It offers adjustable current settings ranging from 12.5 to 50 Amperes, catering to a variety of motor sizes and applications. This relay is classified as Size S3, indicating its physical dimensions and compatibility with specific contactor models. It features adjustable tripping classes from 5E to 30E, allowing users to fine-tune the response time based on the motor's thermal characteristics and 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 employs spring-type terminals for quick and vibration-resistant signal connections. Users can select between manual, automatic, or remote reset options, providing flexibility in managing overload events. This overload relay provides reliable protection against overcurrents, phase loss, and locked rotor conditions, extending the lifespan of your motors and preventing costly downtime. It is an essential component for any motor control system, ensuring efficient and safe operation.