The Siemens 3RU2116-1AB0 is a compact and reliable thermal overload relay from the trusted SIRIUS 3RU2 Series, engineered to protect three-phase motors against overload conditions, phase failure, and excessive current draw. Featuring an adjustable current setting range of 1.1–1.6 A, Class 10 tripping characteristics, and compatibility with Size S00 Siemens contactors, this relay is ideal for industrial motor starters, automation systems, control panels, and OEM machinery.
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 protection further enhances operational safety and motor reliability.
The Variant AB0 provides an adjustable overload release setting of 1.1–1.6 A, making it suitable for protecting small three-phase motors used in pumps, fans, conveyors, compressors, HVAC equipment, packaging machinery, and industrial automation applications. Its compact S00 frame size allows efficient installation within motor control centers (MCCs), switchboards, and machine-building applications.
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 features screw-type terminals for secure electrical connections and simplified installation. Additional features include a switch position indicator, test function, and STOP button for easier maintenance and troubleshooting.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-1AB0 delivers dependable long-term performance and effective motor protection in demanding industrial environments.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-1AB0 |
| SKU | 3RU2116-1AB0 |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | AB0 |
| Current Setting Range | 1.1–1.6 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 Insulation Voltage | 690 V AC |
| Surge Voltage Resistance | 6 kV |
| Number of Main Poles | 3 |
| Rated Motor Power @ 400V AC-3 | 0.55 kW |
| Operating Temperature | -40°C to +70°C |
| Protection Features | Overload & Phase Failure Protection |
| Weight | Approx. 150 g |
| Manufacturer | Siemens |
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