Siemens 3UA5500-2A Overload Relay For SIRIUS 3UA Series

The Siemens 3UA5500-2A is a precision thermal overload relay designed specifically for integration within the SIRIUS 3UA control system architecture to reliably safeguard three-phase asynchronous motors in demanding industrial environments. Automation technicians install this compact component in motor starter assemblies to immediately detect dangerous electrical anomalies such as three-phase loss, mechanically blocked rotor shafts, or sustained running current exceeding safe thermal operational limits, offering adjustable trip current settings tailored to the specific load characteristics of the driven machinery. This unit ensures seamless compatibility with matching Siemens contactor bases, providing essential secondary protection against component degradation caused by overheating to maintain operational continuity and reduce unplanned downtime in production facilities.