Siemens Sirius 3RU1146-4HB0 Overload Relay is a thermal overload device rated for 36 to 50 A, designed for motor protection and direct mounting on size S3 contactors. It features screw-terminal connections for both the main and auxiliary circuits and supports manual-automatic reset with Class 10 protection, suitable for protecting motors in compact motor-control assemblies. Siemens notes that this model is no longer available and lists the successor as 3RU2136-4GB0.
