Siemens 3RB2066-2GC2 Electronic Overload Relay

Siemens 3RB2066-2GC2 is an electronic overload relay for motor protection with a current range of 55...250 A. Designed for mounting on Siemens SIRIUS contactors in sizes S10/S12, it is rated Class 20E and supports both standalone installation and mounting on a compatible contactor. The main circuit connections are busbar-type, while the auxiliary circuit uses screw terminals. It features a manual-automatic reset option for controlled trip handling and is part of the 3RB2 family of electronic overload relays. This device provides reliable overload protection for motors in industrial controls, targeting applications that require integration with Siemens motor starters and precise current monitoring within the 55...250 A range.