The Siemens 3RN1013-1GW10 is a thermistor motor protection evaluation unit from the SIRIUS family, designed to monitor motor winding temperature via PTC thermistors. It accepts a wide AC/DC control supply from 24 to 240 V at 50/60 Hz, making it suitable for global panels without voltage-selector swaps. The unit provides two changeover (CO) auxiliary contacts for trip and alarm signaling, and includes a reclosing lockout function that prevents automatic restart after a fault — critical for applications where manual reset is required by code or safety practice.
At 22.5 mm wide, it occupies one standard modular width, leaving room alongside contactors or overloads in a motor starter bucket.
The LED display version provides visual indication of operating status and trip condition, which speeds troubleshooting on the floor. No NC or NO auxiliary contacts are fitted — only the two CO contacts handle both normally-open and normally-closed signaling per channel. The unit carries a substance prohibitance date of 05/28/2009, reflecting early RoHS compliance; for current REACH or conflict-minerals declarations, reference the successor's documentation.