Siemens 3RU2116-1HB0 Overload Relay

Siemens Sirius 3RU2116-1HB0 is a 3‑pole thermal overload relay designed for motor protection, with a current setting range of 5.5 to 8.0 A and a compact Size S00 frame that mounts directly to Siemens 3RT contactors (examples include 3RT2015/2016/2017/2018). It is a Class 10 overload device that protects three‑phase motors from overload and phase faults by interrupting current at the preset limit, with screw terminals for both the main circuit and the auxiliary circuit, and a Manual-Automatic reset option for restart control. The unit is rated for insulation up to 690 V, supports 440 V networks, and offers about 6 W typical power loss with a 6 kV surge withstand, making it suitable for standard industrial motor control panels. As part of the Sirius 3RU2 family, it is designed for direct mounting on compatible contactors to minimize panel depth while delivering reliable thermal protection.