Siemens Industrial Controls 3RU2126-4CB0 Relay
The Siemens 3RU2126-4CB0 is a thermal SIRIUS overload relay designed for current-dependent protection of loads with normal starting. This unit operates within the S0 frame size and features a setting range of 17.0 to 22.0 Amps. Built for seamless integration with 3RT202 contactors, it provides reliable protection against phase failure and overload conditions according to IEC 60947-4-1. The screw terminal connections ensure high contact stability in high-vibration HVACR environments. With integrated manual/auto reset functionality and a clear switch position indicator, this relay minimizes downtime by allowing technicians to quickly diagnose trips. The auxiliary contacts (1 NO + 1 NC) allow for easy signaling and interlocking within the control circuit. This Class 10 component is essential for protecting three-phase motors and resistive loads where precise thermal monitoring is required.
Key Benefits
- Direct Mounting: Engineered for plug-and-play compatibility with Siemens S0 contactors, reducing cabinet wiring time.
- Phase Loss Sensitivity: Advanced protection mechanisms detect asymmetrical current distribution to prevent motor winding damage.
- Temperature Compensation: Operational reliability from -40°C to +70°C ensures consistent trip curves in extreme mechanical rooms.
- STOP Function: Integrated test and stop buttons allow for routine safety checks without specialized diagnostic tools.
Common Questions
What is the maximum fuse rating for short-circuit protection?
For Type 2 coordination, use a 63A gG fuse or equivalent circuit breaker to prevent welding of the contacts during a fault.
Can this relay be used with a VFD?
Thermal overloads like the 3RU2126-4CB0 are generally calibrated for 50/60Hz; for variable frequency applications, monitor the motor thermistor or use an electronic overload relay.
Does this unit support remote reset?
The standard configuration uses manual or automatic reset on the device. Remote reset requires an optional mechanical or electrical reset module.
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.
Original: $83.40
-65%$83.40
$29.19Siemens Industrial Controls 3RU2126-4CB0 Relay
The Siemens 3RU2126-4CB0 is a thermal SIRIUS overload relay designed for current-dependent protection of loads with normal starting. This unit operates within the S0 frame size and features a setting range of 17.0 to 22.0 Amps. Built for seamless integration with 3RT202 contactors, it provides reliable protection against phase failure and overload conditions according to IEC 60947-4-1. The screw terminal connections ensure high contact stability in high-vibration HVACR environments. With integrated manual/auto reset functionality and a clear switch position indicator, this relay minimizes downtime by allowing technicians to quickly diagnose trips. The auxiliary contacts (1 NO + 1 NC) allow for easy signaling and interlocking within the control circuit. This Class 10 component is essential for protecting three-phase motors and resistive loads where precise thermal monitoring is required.
Key Benefits
- Direct Mounting: Engineered for plug-and-play compatibility with Siemens S0 contactors, reducing cabinet wiring time.
- Phase Loss Sensitivity: Advanced protection mechanisms detect asymmetrical current distribution to prevent motor winding damage.
- Temperature Compensation: Operational reliability from -40°C to +70°C ensures consistent trip curves in extreme mechanical rooms.
- STOP Function: Integrated test and stop buttons allow for routine safety checks without specialized diagnostic tools.
Common Questions
What is the maximum fuse rating for short-circuit protection?
For Type 2 coordination, use a 63A gG fuse or equivalent circuit breaker to prevent welding of the contacts during a fault.
Can this relay be used with a VFD?
Thermal overloads like the 3RU2126-4CB0 are generally calibrated for 50/60Hz; for variable frequency applications, monitor the motor thermistor or use an electronic overload relay.
Does this unit support remote reset?
The standard configuration uses manual or automatic reset on the device. Remote reset requires an optional mechanical or electrical reset module.
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
Shipping & Returns
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Description
The Siemens 3RU2126-4CB0 is a thermal SIRIUS overload relay designed for current-dependent protection of loads with normal starting. This unit operates within the S0 frame size and features a setting range of 17.0 to 22.0 Amps. Built for seamless integration with 3RT202 contactors, it provides reliable protection against phase failure and overload conditions according to IEC 60947-4-1. The screw terminal connections ensure high contact stability in high-vibration HVACR environments. With integrated manual/auto reset functionality and a clear switch position indicator, this relay minimizes downtime by allowing technicians to quickly diagnose trips. The auxiliary contacts (1 NO + 1 NC) allow for easy signaling and interlocking within the control circuit. This Class 10 component is essential for protecting three-phase motors and resistive loads where precise thermal monitoring is required.
Key Benefits
- Direct Mounting: Engineered for plug-and-play compatibility with Siemens S0 contactors, reducing cabinet wiring time.
- Phase Loss Sensitivity: Advanced protection mechanisms detect asymmetrical current distribution to prevent motor winding damage.
- Temperature Compensation: Operational reliability from -40°C to +70°C ensures consistent trip curves in extreme mechanical rooms.
- STOP Function: Integrated test and stop buttons allow for routine safety checks without specialized diagnostic tools.
Common Questions
What is the maximum fuse rating for short-circuit protection?
For Type 2 coordination, use a 63A gG fuse or equivalent circuit breaker to prevent welding of the contacts during a fault.
Can this relay be used with a VFD?
Thermal overloads like the 3RU2126-4CB0 are generally calibrated for 50/60Hz; for variable frequency applications, monitor the motor thermistor or use an electronic overload relay.
Does this unit support remote reset?
The standard configuration uses manual or automatic reset on the device. Remote reset requires an optional mechanical or electrical reset module.
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.
