The SIEMENS 3RN2012-1BA30 is a thermistor motor protection relay designed for panel mounting in a 22.5 mm enclosure to protect motors from overheating and circuit faults. It provides two change-over contacts and accepts a 24 V AC/DC supply, with manual, auto, or remote reset options and a test/reset button for straightforward commissioning. Built-in wire-break and short-circuit monitoring plus galvanic isolation help maintain safe operation, while two LEDs indicate ready and tripped states. Non-volatile settings and screw terminal connections simplify installation and restore configuration after power loss, making it suitable for industrial motor protection applications.
