The Siemens 3RU2116-1JB00-8K is a high-performance thermal overload relay from the proven 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 7–10 A, Class 10 tripping characteristics, and compatibility with Size S00 Siemens contactors, this relay is ideal for industrial motor control systems, motor starters, and automation applications.
Built on Siemens' thermal overload protection technology, the relay continuously monitors motor current and responds to sustained overload conditions using an inverse-time delayed tripping mechanism. This helps prevent motor overheating, winding damage, and costly downtime while allowing normal motor starting currents to pass without nuisance tripping. Integrated phase-failure sensitivity further enhances motor protection and system reliability.
The Variant JB008K provides an adjustable overload release setting of 7–10 A, making it suitable for protecting motors used in pumps, fans, compressors, conveyor systems, HVAC equipment, packaging machinery, machine tools, and industrial automation equipment. Its compact S00 frame size allows efficient installation in control panels, OEM machinery, and motor control centers.
The relay supports both manual and automatic reset modes and incorporates 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for signaling, monitoring, and control circuit integration. Direct contactor mounting and screw-terminal connections simplify installation and maintenance. The relay is rated for systems up to 690 V AC.
Manufactured according to Siemens' stringent quality standards, the 3RU2116-1JB00-8K delivers long service life and reliable motor protection in demanding industrial environments.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-1JB00-8K |
| SKU | 3RU2116-1JB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | JB008K |
| Current Setting Range | 7–10 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 Operational Voltage | Up to 690 V AC |
| Number of Main Poles | 3 |
| Protection Features | Overload & Phase Failure Protection |
| Application | Industrial Motor Protection |
| Manufacturer | Siemens |
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