The Siemens 3RU2116-4AB00-8K is a SIRIUS 3RU2 thermal overload relay designed to provide dependable motor overload and phase failure protection for three-phase motors. With an adjustable current setting range of 11–16A and Class 10 tripping characteristics, it protects motors against overheating caused by overload conditions while ensuring reliable operation in industrial environments.
Designed for S00 size contactor mounting, the relay mounts directly onto compatible Siemens SIRIUS contactors, creating a compact and space-saving motor starter assembly. It features screw terminals for both the main and auxiliary circuits, ensuring secure wiring and quick installation. The relay also includes manual and automatic reset modes, allowing flexible operation based on application requirements.
Built to Siemens' high-quality standards, the 3RU2116-4AB00-8K offers excellent thermal stability, phase-loss sensitivity, long service life, and reliable motor protection. It is widely used in motor control centers (MCCs), conveyors, pumps, compressors, HVAC equipment, machine tools, OEM machinery, and industrial automation systems.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3RU2116-4AB00-8K |
| Product Series | SIRIUS 3RU2 |
| Product Type | Thermal Overload Relay |
| Current Setting Range | 11–16 A |
| Trip Class | Class 10 |
| Relay Size | S00 |
| Mounting Type | Contactor Mounting |
| Compatible Contactor Size | S00 |
| Main Circuit Connection | Screw Terminals |
| Auxiliary Circuit Connection | Screw Terminals |
| Main Circuit Poles | 3 Pole |
| Auxiliary Contacts | 1 NO + 1 NC |
| Rated Operational Voltage | Up to 690 V AC |
| Operating Frequency | 50/60 Hz |
| Rated Insulation Voltage | 690 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Reset Function | Manual / Automatic Reset |
| Phase Failure Protection | Yes |
| Degree of Protection | IP20 |
| Standards | IEC 60947-4-1 |
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