Siemens 3RU2126-1GB0 is a SIRIUS 3RU2 thermal overload relay designed for motor protection, offering an adjustable trip range from 4.5 to 6.3 A and sized for mounting on a contactor in the S0 frame. It features direct mounting with screw terminals on both the main circuit and the auxiliary circuit, and supports manual or automatic reset after tripping. The unit includes a single auxiliary contact configuration of 1 normally open (NO) and 1 normally closed (NC) contact (1NO+1NC) and is rated for Class 10 accuracy, making it suitable for compact motor protection in belts, pumps, fans and small machinery using Siemens 3RT contactors.
