3RU1146-4MD0 SIEMENS

The 3RU1146-4MD0 is a Siemens overload relay designed to provide comprehensive motor protection. It offers reliable protection against overloads, phase failures, and locked rotor conditions, safeguarding motors from potential damage. This particular model has a current range of 80 to 100 Amperes, making it suitable for motors with corresponding current requirements. It belongs to size S3 and operates under Class 10 tripping characteristics, ensuring quick response to overload situations. The relay is designed for direct mounting onto contactors, simplifying installation and saving space within the electrical panel. The main circuit connections utilize screw terminals for secure and robust connections, while the auxiliary circuit employs spring-type terminals for faster and more convenient wiring. It features a manual-automatic-reset function, providing flexibility in managing fault conditions. Please note that the 3RU1146-4MD0 has been phased out and is no longer actively manufactured. The recommended successor is the SIRIUS 3RU2, specifically the 3RU2146-4MD0 model, which offers enhanced features and performance.