Siemens 3RU1146-4HB0 36-50A Class 10 Motor Overload Relay

The Siemens 3RU1146-4HB0 is a Size S3 overload relay designed for robust motor protection, featuring an adjustable current range of 36-50A and a Class 10 tripping characteristic. It utilizes screw terminals for main and auxiliary circuits and supports both manual and automatic reset. This model is a phased-out product, with the SIRIUS 3RU2 series, specifically 3RU2136-4GB0, identified as its successor.

This overload relay is essential for safeguarding electric motors against overcurrents and phase imbalances in demanding industrial environments. Its applications span across heavy machinery, manufacturing lines, large fan systems, and pump control systems where reliable and precise motor protection is paramount.

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