Siemens 3RU2116-1KB0 Overload Relay

Siemens 3RU2116-1KB0 is a three-pole thermal overload relay designed for motor protection that mounts to Siemens 3RT contactors in the size S00 family. Adjustable from 9.0 to 12.5 A, it provides precise protection for motors by tripping when current exceeds the set range, helping prevent burnout from overloads. The unit features screw terminals on both the main circuit and the auxiliary circuit, and supports manual or automatic reset for convenient fault recovery in panel installations. With a Class 10 thermal trip profile, it ensures fast, consistent protection within standard motor control circuits. The 3RU2116-1KB0 is intended for use with compatible Siemens contactors such as the 3RT2015, 3RT2016, 3RT2017, and 3RT2018, enabling compact motor starter assemblies with integrated overload protection. This relay is sized for S00 mounting and occupies minimal panel space while delivering reliable overload protection in three-phase applications.