Thermistor motor protection Standard evaluation unit MANUAL, 1 NO + 1 NC, 24 V AC/DC. Thermistor motor protection Standard evaluation unit MANUAL, 1 NO + 1 NC, 24 V AC/DC 3RN1011-2CB00 Siemens is a reliable and high-quality industrial thermal overload relay. It is suitable for a wide range of industrial applications such as motor protection. Purchase this item at PLC2Day for top-notch performance and durability.