Siemens 3RU1116-1EB0 Overload Relay

Siemens 3RU1116-1EB0 is a SIRIUS thermal overload relay designed to protect small motors by monitoring current and tripping on thermal overload as part of a motor protection circuit, typically mounting directly to compatible Siemens contactors such as 3RT1015, 3RT1016, or 3RT1017. This Size S00 device provides a rated current range of 2.8 to 4 A (L1/L2/L3) and includes one normally open and one normally closed auxiliary contact (1NO+1NC) for signaling, with screw terminals for both main and auxiliary circuits. Electrical ratings include insulation voltage up to 690 V, IP20 protection on the front, a trip class of 10, and a typical total power loss around 6.6 W, making it suitable for 690 V systems in compact motor control applications. Used in machinery, pumps, fans, conveyors, and HVAC equipment, it serves as a compact protection module that complements Siemens contactors in protecting motors from overload conditions while providing basic signaling for control circuits.