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.
Mounts on 35 mm DIN rail via the integrated screw and snap-on fastening. At 22.5 mm wide, it occupies one standard modular width, leaving room alongside contactors or overloads in a motor starter bucket. The IP20 rating means it is protected against finger contact but must be installed inside an enclosure. Ambient operating range of -25 to +60 °C covers most industrial environments, but derating may apply near the upper limit if the panel is tightly packed. Screw-type terminals accept solid or stranded wire; strip length and torque follow standard Siemens terminal specs for this form factor.
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.