Siemens 3RU2116-1KB0 Thermal Overload Relay 9 To 12.5 Amps

Siemens 3RU2116-1KB0 is a thermal overload relay for motor protection with an adjustable current range of 9.0 to 12.5 A, designed for direct mounting on size S00 contactors in the SIRIUS 3RU2 family, enabling compact protection in space-constrained panels. It uses screw-terminal connections for both the main circuit and the auxiliary circuit and supports either manual or automatic reset, delivering reliable fault clearance and straightforward wiring. The device is rated for insulation up to 690 V and offers surge resistance up to 6 kV, with a typical power loss around 5.1 W in normal operation, making it suitable for continuous use in demanding industrial environments. It is built with Class 10 overload protection and is intended for direct mounting on Siemens 3RT contactors, providing a space-saving, integrated protection module for three-phase motors. The operating temperature range spans -40 to 70 C, reinforcing its suitability for a wide range of applications from manufacturing lines to process equipment.