The Siemens 3RN1010-1CW00 is a SIRIUS thermistor motor protection evaluation unit designed to monitor PTC thermistor sensors embedded in motor windings. It accepts a universal control supply of 24-240 V AC/DC, covering 50 Hz and 60 Hz installations without voltage-selector switches. The unit provides one normally-open and one normally-closed auxiliary contact (1 NO + 1 NC), wired via screw-type terminals.
It operates over an ambient temperature range of -25 °C to +60 °C, suitable for most industrial environments without derating. The 22.5 mm width and 91 mm depth allow placement in crowded DIN-rail rows alongside other SIRIUS components. Screw and snap-on mounting gives flexibility for panel assembly.