The Siemens 3RU2116-1EB00-8K is a compact and dependable thermal overload relay from the proven SIRIUS 3RU2 Series, designed to protect three-phase motors against overload conditions, phase failure, and overheating. Featuring an adjustable current setting range of 2.8–4 A, Class 10 tripping characteristics, and compatibility with Size S00 Siemens contactors, this relay is ideal for industrial motor starters, control panels, HVAC systems, pumps, fans, and automation equipment. Siemens specifies the 3RU2 series for current-dependent motor protection with direct contactor mounting.
Built on Siemens’ thermal overload protection technology, the relay continuously monitors motor current and trips when overload conditions persist beyond safe operating limits. Its inverse-time delayed tripping characteristic helps prevent motor winding damage and insulation deterioration while allowing normal motor starting currents. Integrated phase-failure sensitivity provides additional protection against phase imbalance and phase loss conditions.
The Variant EB008K provides an adjustable overload release setting of 2.8–4 A, making it suitable for protecting motors used in pumps, fans, compressors, conveyors, packaging machinery, HVAC equipment, and industrial automation applications. Its compact S00 frame size allows efficient installation in OEM machinery, motor control centers (MCCs), and industrial switchboards. The equivalent EB variant in the SIRIUS range is specified with a 2.8–4 A adjustment range.
The relay incorporates 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for trip indication, signaling, and control circuit integration. It supports both manual and automatic reset modes and features screw-type terminals for secure wiring and simplified maintenance. The relay is rated for applications up to 690 V AC.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-1EB00-8K delivers reliable long-term performance and dependable motor protection in demanding industrial environments.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-1EB00-8K |
| SKU | 3RU2116-1EB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | EB008K |
| Current Setting Range | 2.8–4 A |
| Relay Size | S00 |
| Trip Class | Class 10 |
| Operating Principle | Thermal |
| Mounting Type | Direct Contactor Mounting |
| Main Circuit Connection | Screw Terminal |
| Auxiliary Contacts | 1 NO + 1 NC |
| Reset Type | Manual / Automatic |
| Rated Insulation Voltage | 690 V |
| Surge Voltage Resistance | 6 kV |
| Operating Frequency | 50/60 Hz |
| Number of Main Poles | 3 |
| Protection Features | Overload & Phase Failure Protection |
| Application | Industrial Motor Protection |
| Manufacturer | Siemens |
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