Siemens 3RN20112BA30

The Siemens 3RN20112BA30 is a thermistor motor protection relay designed to provide reliable motor monitoring and safeguarding. This unit features a compact 22.5 mm enclosure with spring-type terminals, making installation straightforward and secure. It includes two change-over contacts and operates with a control voltage of 24 V AC/DC. The relay supports both manual and remote reset options, allowing flexible control in various applications. Equipped with ATEX approval, it meets safety standards for use in potentially explosive environments. Two LED indicators clearly show the relay’s status — whether it is ready or has tripped. Additional features include galvanic isolation for improved signal integrity, a test and reset button, and wire break monitoring to enhance protection. Distributed by BSP Automation, this motor protection relay is a practical choice for ensuring motor reliability in industrial settings.