The Siemens 3RN1062-1CW00 is a thermistor motor protection relay that monitors PTC sensor circuits in motor windings, opening its NC contact when the winding temperature exceeds the sensor threshold. It accepts any control supply from 24 V to 240 V AC or DC, so one part covers both 120 V and 230 V control panels without a separate supply transformer.
Mounts via screw fixing or snaps onto a DIN rail. Screw-type terminals for the auxiliary and control circuit accept standard ferruled conductors. The reclosing lockout function prevents automatic restart after a trip — useful for motor protection where manual reset is required.