Siemens, SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC, 14A, 20 A F.L.C, 20A Contact Rating, 7.5 kW 3
- RS Stock No.:
- 706-1664
- Distrelec Article No.:
- 136-23-078
- Mfr. Part No.:
- 3RU2126-4BB0
- Brand:
- Siemens
Subtotal (1 unit)*
£48.45
(exc. VAT)
£58.14
(inc. VAT)
FREE delivery for orders over £60.00
In Stock
- 13 unit(s) ready to ship
- Plus 2 unit(s) ready to ship from another location
- Plus 11 unit(s) shipping from 30 April 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 + | £48.45 |
*price indicative
- RS Stock No.:
- 706-1664
- Distrelec Article No.:
- 136-23-078
- Mfr. Part No.:
- 3RU2126-4BB0
- Brand:
- Siemens
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Product Type | Thermal Overload Relay | |
| FLC Motor Rating | 14, 20A | |
| Relay Contact Current | 20A | |
| Series | SIRIUS 3RU2 | |
| Mount Type | Direct | |
| Pole and Throw Configuration | 3 | |
| Power Rating | 7.5kW | |
| Normal State Configuration | 1 NO/1 NC | |
| Terminal Type | Screw | |
| IP Rating | IP20 | |
| Reset Method | Automatic & Manual | |
| Minimum Operating Temperature | -40°C | |
| Width | 45mm | |
| Adjustable Current Range | 14 to 20 A | |
| Number of Auxiliary Contacts | 2 | |
| Length | 87mm | |
| Contact Voltage | 690V ac | |
| Maximum Operating Temperature | 70°C | |
| Standards/Approvals | IEC 65029, IEC 81346-2, UL Approved, CSA Approved, EAC Approved, IEC 60068-2-27, IEC 61508, CCC approved, CE Approved | |
| Depth | 85mm | |
| Select all | ||
|---|---|---|
Brand Siemens | ||
Product Type Thermal Overload Relay | ||
FLC Motor Rating 14, 20A | ||
Relay Contact Current 20A | ||
Series SIRIUS 3RU2 | ||
Mount Type Direct | ||
Pole and Throw Configuration 3 | ||
Power Rating 7.5kW | ||
Normal State Configuration 1 NO/1 NC | ||
Terminal Type Screw | ||
IP Rating IP20 | ||
Reset Method Automatic & Manual | ||
Minimum Operating Temperature -40°C | ||
Width 45mm | ||
Adjustable Current Range 14 to 20 A | ||
Number of Auxiliary Contacts 2 | ||
Length 87mm | ||
Contact Voltage 690V ac | ||
Maximum Operating Temperature 70°C | ||
Standards/Approvals IEC 65029, IEC 81346-2, UL Approved, CSA Approved, EAC Approved, IEC 60068-2-27, IEC 61508, CCC approved, CE Approved | ||
Depth 85mm | ||
- Switching Devices for Load Feeders
- Datasheet_3RU2126-4BB0
- Sirius Innovation Accessory Guide
- Sirius Innovation Catalogue
- Sirius Innovations Switching Devices
- Solutions for frequent switching or soft starting
- Basic Information
- Siemens Sirius Migration
- Environmental Product Declaration
- Manual - 3RU2 Series
- Instruction Sheet - 3RU2116/3RU2126 Series
- COO (Country of Origin):
- DE
Siemens SIRIUS 3RU2 Series Thermal Overload Relay, 20A Contact Current Rating, 7.5kW Power Rating - 3RU2126-4BB0
This thermal overload relay plays a vital role in protecting electrical motors, specifically designed for those operating within a current range of 14 to 20 A. Featuring both automatic and manual reset functions, it helps prevent damage caused by overload situations. Its durable design allows for easy installation directly onto contactors, making it suitable for various automation and electrical machinery applications.
Features & Benefits
• Provides continuous protection for 3-phase motors
• Automatic reset feature enhances operational convenience
• Integrated auxiliary contacts for additional functionality
• Compact dimensions support space-efficient installations
Applications
• Applicable with industrial machinery to ensure operational safety
• Can be integrated into commercial electrical systems
• Commonly used in manufacturing environments for motor protection
What is the installation process for this device?
The device can be installed directly on contactors using screw terminals, ensuring a straightforward setup.
How does the automatic reset feature work?
Upon a fault occurrence, the device disconnects the motor and automatically reconnects once the fault is resolved.
Is this suitable for high current applications?
Yes, it is rated for safe operation with currents up to 20A.
Can it operate in high-temperature environments?
Yes, it performs well within a temperature range of -40 to +70°C.