Siemens 3RN2013-1BA30 Thermistor Motor Protection Relay 24 V AC/DC

The Siemens 3RN2013-1BA30 is a motor protection relay designed to monitor temperature via a thermistor sensor. It fits standard 22.5 mm enclosures and installs on a DIN rail for easy mounting. The relay uses a 24 V AC or DC supply for control.

This device features two change-over contacts, allowing flexible control or signalling when a motor’s temperature exceeds safe limits. It offers manual, automatic, or remote reset options, and provides safe galvanic isolation between circuits. It also includes built-in functions for wire-break and short-circuit fault detection in the sensor circuit.

With LED indicators for “ready” and “tripped” status, the relay gives clear visual feedback. It operates safely between –25 °C and +60 °C and meets relevant surge and insulation standards, ensuring stable performance in demanding industrial environments.

Use the 3RN2013-1BA30 when you want reliable temperature-based motor protection — ideal for machinery, HVAC, pumps and other systems where thermal overload must be monitored and controlled.