Siemens 3RU2116-1EB0 Thermal Overload Relay 2.8 to 4 Amps

Siemens 3RU2116-1EB0 is a Sirius 3RU2 thermal overload relay that protects 3-phase motors by monitoring current in the 2.8 to 4.0 A range, in size S00 with a Class 10 trip characteristic. It is designed to mount on a compatible Siemens contactor using screw terminals for both the main circuit and the auxiliary circuit, and it offers a manual-automatic reset option for convenient restart after tripping. This overload relay guards against overload, phase asymmetry, and phase failure, making it suitable for motor protection in control panels and industrial drives. Rated for use up to 690 V, it provides insulation rated at 690 V and withstands surge voltages up to 6 kV; typical active power loss is about 5.4 W, contributing to panel heat management. When paired with the Sirius 3RU2 system, the 3RU2116-1EB0 serves as a compact, current-sensing protective element for small to medium motors in automation circuits.