Siemens 3RU2116-1CB1 is a three-pole thermal overload relay from the SIRIUS 3RU2 family designed to protect three-phase motors by interrupting current when overloads occur. This stand-alone unit uses screw terminals for both the main circuit and the auxiliary circuit and includes manual or automatic reset after tripping. The relay is rated for motor protection with a current range of 1.8 to 2.5 A, is size S00, and carries Class 10 protection, making it suitable for coordination with compatible Siemens contactors; insulation voltage up to 690 V accommodates typical industrial motor circuits.
