Siemens Overload relay for motor protection, size S00, 9-12.5A

Product Overview

The 3RU2116-1KB0 thermal overload relay is designed for current-dependent protection of three-phase motors and electrical loads against overload, phase asymmetry, and phase failure. This Size S00, Class 10 relay features an adjustable current range of 9.0 to 12.5 A and is optimized for direct mounting on Siemens 3RT contactors to save space while providing reliable motor protection.

Key Features

• Current Range: 9.0 to 12.5 A adjustment range
• Protection Class: Class 10 tripping characteristic for fast response
• Mounting: Contactor mounting, compatible with 3RT2015 through 3RT2018 contactors
• Terminal Type: Screw terminals for both main and auxiliary circuits
• Auxiliary Contacts: 1 normally open (NO) + 1 normally closed (NC) contact
• Reset Function: Manual or automatic reset capability
• Enclosure Rating: IP20 for standard industrial applications
• Operating Temperature: -20°C to +70°C
• Dimensions: 76mm H x 45mm W x 70mm D
• Weight: 0.154 kg

Technical Specifications

• Frequency Rating: 50/60 Hz
• Contact Rating: 12.5A at 690VAC
• Poles: 3-pole configuration
• Tripping Time: Less than 10 seconds at overload conditions
• Compliance: RoHS compliant, meets IEC standards
• Maximum Operating Voltage: 690V
• Power Rating: 5.5 kW
• Insulation Voltage: 690V
• Impulse Voltage Resistance: 6 kV

Applications The 3RU2116-1KB0 is suitable for protecting motors and electrical loads in industrial applications where reliable overload protection is required. It provides inverse time-delayed protection against excessive temperature rises due to overload or phase failure, making it ideal for applications with normal starting conditions and frequency converter operations.

Operation When an overload or phase failure occurs, the motor current rises above the set rated current. This current increase heats up the bimetal strips within the relay via heating elements, causing them to bend and trigger the auxiliary contacts through a tripping mechanism. The auxiliary contacts then switch off the load via a contactor, with the tripped status indicated by a switch position indicator. The relay features both TEST and STOP functions for enhanced functionality.

Product Information

• Net Weight: 0.154 kg
• Packaging Dimensions: 49.00 x 102.00 x 84.00 mm
• EAN: 4011209781689
• UPC: 662643918854
• Country of Origin: Germany

Compliance & Environmental

• RoHS Compliance: Yes (since 01.10.2009)
• WEEE Take-Back: Yes (2012/19/EU)
• REACH Article 33: Contains lead in concentrations higher than 0.1% w/w
• Export Control: AL: N / ECCN: N

Download existing graphical data for this product:

• Product Datasheet
• Technical Documentation
• CAD Data and Drawings

Additional Resources

• SIRIUS 3RU2 Product Family
• Siemens Industry Mall