The Siemens 3RU2116-1AB00-8K is a compact and dependable thermal overload relay from the proven SIRIUS 3RU2 Series, designed to provide reliable protection for three-phase motors against overload conditions, phase failure, and prolonged overcurrent operation. 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 motor starters, industrial control panels, OEM machinery, and automation systems.
Built on Siemens' proven inverse-time thermal protection technology, the relay continuously monitors motor current and disconnects the motor when overload conditions exceed permissible limits. This helps prevent motor overheating, winding damage, insulation deterioration, and costly downtime while allowing normal motor starting currents to pass without nuisance tripping. Integrated phase-failure sensitivity further enhances motor protection and operational reliability.
The Variant AB008K 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 enables 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.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-1AB00-8K delivers dependable long-term performance and effective motor protection in demanding industrial environments.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-1AB00-8K |
| SKU | 3RU2116-1AB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | AB008K |
| 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 |
| Rated Motor Power @ 400V AC-3 | 0.55 kW |
| Number of Main Poles | 3 |
| IP Rating | IP20 |
| Operating Temperature | -40°C to +70°C |
| Protection Features | Overload & Phase Failure Protection |
| Manufacturer | Siemens |
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