3RU1146-4JBOBuy genuine Siemens 3RU1146 4JB0 online The Siemens 3RU1146 4JB0 is a factory grade thermal overload relay designed to provide reliable motor protection in industrial automation and control systems. Part of the Siemens SIRIUS family, this overload relay offers precise protection against motor overloads, phase failures, and phase asymmetry. It features a size S3 frame, Class 10 trip characteristic, and an adjustable current range from 45 to 63 amps,
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