The Siemens 3RU2116-1CB00-8K is a reliable Siemens SIRIUS Thermal Overload Relay designed for dependable motor overload protection in industrial electrical systems, motor starter panels, control cabinets, and automation applications. Part of the proven SIRIUS 3RU2 series, this thermal motor protection relay provides an adjustable current setting range of 1.8–2.5A with a Class 10 thermal trip characteristic, helping protect motors against prolonged overload and excessive operating current.
The 3RU2116-1CB00-8K overload relay features a compact S00 frame size and is designed for contactor mounting with compatible Siemens SIRIUS S00 contactors. It provides a 3-pole main circuit, screw terminals for both the main and auxiliary circuits, and manual/automatic reset functionality. The relay has a rated operating voltage of up to 690V, rated insulation voltage of 690V, and surge voltage resistance of 6kV, making it suitable for industrial motor control applications.
With its adjustable 1.8–2.5A motor protection range, the Siemens thermal overload relay can be set according to the motor's rated operating current. It is suitable for DOL motor starters, pump control panels, compressors, conveyor systems, HVAC equipment, packaging machinery, machine tools, OEM control panels, water treatment systems, and industrial automation applications.
The Siemens SIRIUS 3RU2 thermal overload relay combines compact construction, Class 10 thermal protection, flexible reset functionality, and contactor mounting, making it a practical solution for reliable motor starter assemblies.
At SB Smart, Faridabad, we supply genuine Siemens SIRIUS thermal overload relays, motor protection relays, contactors, motor protection circuit breakers, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, technical assistance, bulk-order support, secure packaging, and delivery across Faridabad, Delhi NCR, and major cities throughout India.
Genuine Siemens SIRIUS 3RU2 Thermal Overload Relay
Model: 3RU2116-1CB00-8K
Adjustable Overload Current Range: 1.8–2.5A
Class 10 Thermal Trip Characteristic
S00 Frame Size
Designed for Contactor Mounting
3-Pole Main Circuit
Main Circuit: Screw Terminals
Auxiliary Circuit: Screw Terminals
Manual/Automatic Reset
Rated Operating Voltage: up to 690V
Rated Insulation Voltage: 690V
Surge Voltage Resistance: 6kV
Operating Frequency: 50–60Hz
Power Loss: 5.7W at rated current in hot operating condition
Compatible with Siemens SIRIUS S00 Contactors
Temperature Compensation
Compact design for industrial motor control panels
Reliable thermal motor overload protection
Motor Control Centers (MCC)
DOL Motor Starters
Industrial Motor Starter Panels
Motor Control Panels
Pump Control Panels
Compressor Systems
Conveyor Systems
HVAC Motor Control
Packaging Machinery
Machine Tools
Water Treatment Plants
OEM Control Panels
Factory Automation
Industrial Automation Systems
Process Control Equipment
Provides reliable thermal overload protection for motors
Adjustable 1.8–2.5A range enables accurate motor protection
Class 10 trip characteristic supports motors with normal starting conditions
Helps protect motors against prolonged overload conditions
Manual/automatic reset provides flexible operation
Contactor mounting simplifies motor starter assembly
Screw terminals provide secure electrical connections
Compact S00 overload relay helps save valuable panel space
Compatible with Siemens SIRIUS S00 contactors
Helps improve motor operating reliability
Helps reduce the risk of motor overheating
Suitable for industrial electrical and automation applications
Designed for dependable long-term operation
The Siemens 3RU2116-1CB00-8K is a thermal overload relay and motor protection relay used to protect motors against excessive current and thermal overload conditions. It is designed for contactor mounting with compatible Siemens SIRIUS S00 contactors.
The 3RU2116-1CB00-8K has an adjustable overload current range of 1.8A to 2.5A, allowing the protection setting to be matched to the motor's rated operating current.
The relay features a Class 10 thermal trip characteristic, making it suitable for standard motor applications requiring reliable thermal overload protection.
The 3RU2116-1CB00-8K is an S00-size Siemens SIRIUS thermal overload relay designed for combination with compatible S00-size contactors.
Yes. The Siemens 3RU2116-1CB00-8K supports manual/automatic reset, providing flexibility for different motor starter and control applications.
The 3RU2116-1CB00-8K uses screw terminals for the main circuit and auxiliary circuit, providing secure electrical connections.
The relay has a rated insulation voltage of 690V and 6kV surge voltage resistance.
The relay is designed for S00 contactor mounting and can be combined with compatible Siemens SIRIUS S00 contactors to create a complete motor starter assembly.
This Siemens motor overload relay can be used in DOL starters, pump control systems, compressors, conveyors, HVAC systems, packaging machines, machine tools, OEM panels, water treatment plants, and industrial automation systems.
SB Smart, Faridabad supplies genuine Siemens SIRIUS thermal overload relays, motor protection relays, contactors, and industrial automation products with competitive pricing, GST invoices, technical support, bulk-order assistance, secure packaging, and delivery across Faridabad, Delhi NCR, and India.
| Specification | Details |
|---|---|
| Product Name | Thermal Overload Relay |
| Part Number | 3RU2116-1CB00-8K |
| SKU | 3RU2116-1CB00-8K |
| Brand | Siemens |
| Product Family | SIRIUS 3RU2 |
| Product Type | Motor Protection Relay |
| Variant | CB008K |
| Current Setting Range | 1.8–2.5 A |
| Relay Size | S00 |
| Trip Class | Class 10 |
| Operating Principle | Thermal |
| Mounting Type | 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 |
| Operating Frequency | 50–60 Hz |
| Number of Main Poles | 3 |
| Rated Motor Power @ 400V AC-3 | 0.75 kW |
| Operating Temperature | -40°C to +70°C |
| Protection Features | Overload & Phase Failure Protection |
| Manufacturer | Siemens |
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