Siemens 3RU2116-1CB0 Overload Relay

Siemens 3RU2116-1CB0 is a SIRIUS thermal overload relay that protects small motors by mounting on a 3RT/S00-size contactor. It provides thermal protection for motors with a nominal current range of 1.8 to 2.5 A and features a 1NC/1NO auxiliary contact for signaling, with main and auxiliary circuits terminating on screw terminals for secure wiring. Designed for use with S00-sized contactors, this 690 V-rated overload relay integrates with standard Siemens motor control circuits and supports standalone or contactor-mounted protection configurations. The 3RU2116-1CB0 belongs to the SIRIUS series and is specified for motor protection under typical industrial drive setups, ensuring reliable current-based disconnection when thermal limits are exceeded.