The Siemens 3RU2116-0GB00-8K is a compact and dependable thermal overload relay from the trusted SIRIUS 3RU2 Series, designed to provide reliable protection for three-phase motors against overload conditions, phase failure, and overheating. Featuring an adjustable current setting range of 0.45–0.63 A, Class 10 tripping characteristics, and compatibility with Size S00 Siemens contactors, this relay is ideal for protecting small motors used in industrial automation, OEM machinery, HVAC systems, pumps, fans, and process control applications.
Built on Siemens' proven thermal overload protection technology, the relay continuously monitors motor current and disconnects the motor when overload conditions persist beyond safe operating limits. Its inverse-time delayed tripping characteristic helps prevent motor winding damage, insulation deterioration, and costly downtime while allowing normal motor starting currents. Integrated phase-failure sensitivity provides additional protection against phase imbalance and phase loss conditions.
The Variant GB008K provides an adjustable overload release setting of 0.45–0.63 A, making it suitable for protecting fractional horsepower and small three-phase motors used in conveyors, compact pumps, ventilation systems, dosing equipment, packaging machinery, and industrial automation systems. Its compact S00 frame size enables efficient installation in motor control centers (MCCs), switchboards, and industrial control panels.
Designed for direct mounting on compatible Siemens contactors, the relay incorporates 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for signaling, monitoring, and control circuit integration. It supports both manual and automatic reset modes and utilizes screw-type terminals for secure electrical connections and simplified installation. The relay is rated for operation up to 690 V AC.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-0GB00-8K delivers dependable long-term performance and effective motor protection in demanding industrial environments.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-0GB00-8K |
| SKU | 3RU2116-0GB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | GB008K |
| Current Setting Range | 0.45–0.63 A |
| Relay Size | S00 |
| Trip Class | Class 10 |
| Operating Principle | Thermal |
| Mounting Type | Direct Contactor Mounting |
| Main Circuit Connection | Screw Terminal |
| Auxiliary Circuit Connection | Screw Terminal |
| Auxiliary Contacts | 1 NO + 1 NC |
| Reset Type | Manual / Automatic |
| Rated Operational Voltage | Up to 690 V AC |
| Rated Motor Power @ 400V AC-3 | 0.18 kW |
| Number of Main Poles | 3 |
| Operating Temperature | -40°C to +70°C |
| IP Rating | IP20 |
| Protection Features | Overload & Phase Failure Protection |
| Manufacturer | Siemens |
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