Siemens Industrial Controls 3RU2126-1KB0 Relay
The Siemens 3RU2126-1KB0 Overload Relay is a mission-critical component within the SIRIUS 3RU2 thermal relay series, specifically engineered for the current-dependent protection of motors with normal starting currents. This thermal motor protection relay covers a setting range of 9 to 12.5A, making it a standard choice for Size S0 contactors. Unlike general-purpose protection, this bimetallic relay addresses overload and phase failure (phase loss) conditions by shifting the auxiliary contacts to de-energize the coil, effectively isolating the load before winding damage occurs.
Built for the rigors of industrial environments, the 3RU2126-1KB0 features a Class 10 trip characteristic and includes integrated auxiliary contacts (1 NO + 1 NC). Technicians can toggle between manual and automatic reset modes, which simplifies commissioning in inaccessible enclosures. The screw connection system ensures high vibration resistance and secure termination for both the main and auxiliary circuits. Integrated temperature compensation allows for stable operation within a -40°C to +70°C ambient range, though derating should be calculated for temperatures exceeding +60°C.
Key Benefits for Contractors
- Broad Compatibility: Optimally matched for direct mounting to Siemens 3RT2 size S0 contactors, reducing footprint and wiring complexity in the control cabinet.
- Enhanced Motor Safety: Provides sensitive phase failure protection and inverse-time delayed protection to prevent premature motor burnout.
- Diagnostic Tools: Equipped with a switch position indicator and a STOP button for rapid troubleshooting and testing of the control circuit.
- Dual Reset Modes: Selector switch permits a choice between local manual reset and hands-free automatic reset after the bimetallic strips have cooled.
- Global Standards Compliance: Rated for use in hazardous areas (ATEX/IEC Ex) and carries UL, CSA, and IEC approvals for international export.
Common Questions
Can this relay be used with single-phase loads?
Yes. To protect single-phase AC or DC loads with the 3RU2126-1KB0, you must connect all three bimetal strips in series to maintain proper tripping characteristics.
Is this model compatible with 3RU11 older contactors?
The 3RU2 series is designed for the SIRIUS Innovations line. If you are replacing an older 3RU1126 relay, verify the contactor series; you may need to upgrade the contactor to size S0 (3RT2) or utilize a stand-alone mounting bracket.
Does it provide protection against short circuits?
Thermal overload relays focus on overcurrent and phase loss. Short-circuit protection must be provided separately via 3RV motor starter protectors or appropriate fuses according to technical coordination tables.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Siemens Industrial Controls 3RU2126-1KB0 Relay
The Siemens 3RU2126-1KB0 Overload Relay is a mission-critical component within the SIRIUS 3RU2 thermal relay series, specifically engineered for the current-dependent protection of motors with normal starting currents. This thermal motor protection relay covers a setting range of 9 to 12.5A, making it a standard choice for Size S0 contactors. Unlike general-purpose protection, this bimetallic relay addresses overload and phase failure (phase loss) conditions by shifting the auxiliary contacts to de-energize the coil, effectively isolating the load before winding damage occurs.
Built for the rigors of industrial environments, the 3RU2126-1KB0 features a Class 10 trip characteristic and includes integrated auxiliary contacts (1 NO + 1 NC). Technicians can toggle between manual and automatic reset modes, which simplifies commissioning in inaccessible enclosures. The screw connection system ensures high vibration resistance and secure termination for both the main and auxiliary circuits. Integrated temperature compensation allows for stable operation within a -40°C to +70°C ambient range, though derating should be calculated for temperatures exceeding +60°C.
Key Benefits for Contractors
- Broad Compatibility: Optimally matched for direct mounting to Siemens 3RT2 size S0 contactors, reducing footprint and wiring complexity in the control cabinet.
- Enhanced Motor Safety: Provides sensitive phase failure protection and inverse-time delayed protection to prevent premature motor burnout.
- Diagnostic Tools: Equipped with a switch position indicator and a STOP button for rapid troubleshooting and testing of the control circuit.
- Dual Reset Modes: Selector switch permits a choice between local manual reset and hands-free automatic reset after the bimetallic strips have cooled.
- Global Standards Compliance: Rated for use in hazardous areas (ATEX/IEC Ex) and carries UL, CSA, and IEC approvals for international export.
Common Questions
Can this relay be used with single-phase loads?
Yes. To protect single-phase AC or DC loads with the 3RU2126-1KB0, you must connect all three bimetal strips in series to maintain proper tripping characteristics.
Is this model compatible with 3RU11 older contactors?
The 3RU2 series is designed for the SIRIUS Innovations line. If you are replacing an older 3RU1126 relay, verify the contactor series; you may need to upgrade the contactor to size S0 (3RT2) or utilize a stand-alone mounting bracket.
Does it provide protection against short circuits?
Thermal overload relays focus on overcurrent and phase loss. Short-circuit protection must be provided separately via 3RV motor starter protectors or appropriate fuses according to technical coordination tables.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Description
The Siemens 3RU2126-1KB0 Overload Relay is a mission-critical component within the SIRIUS 3RU2 thermal relay series, specifically engineered for the current-dependent protection of motors with normal starting currents. This thermal motor protection relay covers a setting range of 9 to 12.5A, making it a standard choice for Size S0 contactors. Unlike general-purpose protection, this bimetallic relay addresses overload and phase failure (phase loss) conditions by shifting the auxiliary contacts to de-energize the coil, effectively isolating the load before winding damage occurs.
Built for the rigors of industrial environments, the 3RU2126-1KB0 features a Class 10 trip characteristic and includes integrated auxiliary contacts (1 NO + 1 NC). Technicians can toggle between manual and automatic reset modes, which simplifies commissioning in inaccessible enclosures. The screw connection system ensures high vibration resistance and secure termination for both the main and auxiliary circuits. Integrated temperature compensation allows for stable operation within a -40°C to +70°C ambient range, though derating should be calculated for temperatures exceeding +60°C.
Key Benefits for Contractors
- Broad Compatibility: Optimally matched for direct mounting to Siemens 3RT2 size S0 contactors, reducing footprint and wiring complexity in the control cabinet.
- Enhanced Motor Safety: Provides sensitive phase failure protection and inverse-time delayed protection to prevent premature motor burnout.
- Diagnostic Tools: Equipped with a switch position indicator and a STOP button for rapid troubleshooting and testing of the control circuit.
- Dual Reset Modes: Selector switch permits a choice between local manual reset and hands-free automatic reset after the bimetallic strips have cooled.
- Global Standards Compliance: Rated for use in hazardous areas (ATEX/IEC Ex) and carries UL, CSA, and IEC approvals for international export.
Common Questions
Can this relay be used with single-phase loads?
Yes. To protect single-phase AC or DC loads with the 3RU2126-1KB0, you must connect all three bimetal strips in series to maintain proper tripping characteristics.
Is this model compatible with 3RU11 older contactors?
The 3RU2 series is designed for the SIRIUS Innovations line. If you are replacing an older 3RU1126 relay, verify the contactor series; you may need to upgrade the contactor to size S0 (3RT2) or utilize a stand-alone mounting bracket.
Does it provide protection against short circuits?
Thermal overload relays focus on overcurrent and phase loss. Short-circuit protection must be provided separately via 3RV motor starter protectors or appropriate fuses according to technical coordination tables.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
