The Siemens 3RU2116-4AB00-8K is a high-performance thermal overload relay from the trusted SIRIUS 3RU2 Series, designed to provide dependable protection for three-phase motors against overload conditions, phase failure, and excessive current draw. Featuring an adjustable current setting range of 11–16 A, Class 10 tripping characteristics, and compatibility with Size S00 Siemens contactors, this relay is ideal for industrial motor control systems, automation equipment, and compact motor starter assemblies.
Built on Siemens' proven thermal overload protection technology, the relay continuously monitors motor current and disconnects the motor when overload conditions persist beyond permissible limits. Its inverse-time delayed tripping characteristic helps prevent motor overheating, insulation damage, and premature motor failure while allowing normal motor starting currents. Integrated phase-failure sensitivity enhances motor protection and operational reliability.
The Variant AB008K offers an adjustable overload release setting of 11–16 A, making it suitable for protecting motors used in pumps, compressors, conveyor systems, fans, HVAC equipment, packaging machinery, machine tools, and industrial automation applications. Its compact S00 frame size allows efficient integration into motor control centers, OEM machinery, switchboards, and industrial control panels.
The relay is designed for direct contactor mounting and includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for signaling, trip indication, and control circuit integration. It supports both manual and automatic reset modes and features screw-type terminals for secure wiring and simplified installation.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-4AB00-8K delivers reliable long-term performance in demanding industrial environments where continuous motor protection is essential.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-4AB00-8K |
| SKU | 3RU2116-4AB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | AB008K |
| Current Setting Range | 11–16 A |
| Relay Size | S00 |
| Trip Class | Class 10 |
| Mounting Type | Direct Contactor Mounting |
| Operating Principle | Thermal |
| 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 |
| 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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