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20G11NC037JA0NNNNN — PowerFlex 755 AC Drive

Below is a detailed English technical description of 20G11NC037JA0NNNNN, including its product positioning, technical specifications, applications, advantages, dimensional information, weight, related models and additional models from the same brand.

I have kept the presentation focused on the product itself and have omitted company names and source references as requested.

Technical note: the model information indicates 37 A, 18.5 kW normal duty and 15 kW heavy duty, 400 V AC, three-phase, Frame 3. For dimensions and weight, available technical records show 454 × 190 × 212 mm and approximately 12 kg for the drive body; some commercial listings report a higher shipping or handling weight. For cabinet design, the manufacturer’s exact mechanical drawing should be treated as the final reference.

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1. Product Overview

The 20G11NC037JA0NNNNN is an industrial AC variable frequency drive belonging to the PowerFlex 755 family.

It is designed for three-phase industrial motor applications requiring adjustable speed, controlled acceleration and deceleration, network communication, motor protection and more advanced control functions.

The drive is rated for a 400 V AC class three-phase supply and provides a 37 A normal-duty output rating.

Its normal-duty power rating is 18.5 kW, equivalent to approximately 25 HP.

For heavy-duty operation, the drive is rated at approximately 15 kW, making the distinction between normal-duty and heavy-duty selection particularly important when matching the drive to a motor.

The model uses Frame 3 construction, forced-air cooling and an open-type IP20/IP00 enclosure configuration.

It also includes an integrated EtherNet/IP communication interface, an internal dynamic-braking transistor, EMC filtering and DC terminals.

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2. Basic Product Information

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3. Brand

The product belongs to the Allen-Bradley brand.

Allen-Bradley products are widely associated with industrial automation, motor control, programmable control systems and factory automation equipment.

For this particular model, the brand identification is important because the model number is part of the PowerFlex product catalog and its configuration follows the PowerFlex 750-Series naming structure.

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4. Product Series

The 20G11NC037JA0NNNNN belongs to the:

PowerFlex 755 Series

The PowerFlex 755 is positioned as an advanced industrial AC drive platform rather than a basic compact variable-speed drive.

The series is intended for applications where motor speed, torque, positioning, communication, diagnostics and system integration can be important.

Its modular architecture allows additional functions to be incorporated according to the requirements of the machine.

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5. Model Number Interpretation

The model number can be understood as a configuration code rather than simply a product identification number.

The 037 portion is especially important because it identifies the 37 A current class.

The C portion identifies the 400 V AC class.

The J configuration indicates the filtered arrangement with the CM capacitor jumper installed.

The A configuration provides the internal dynamic-braking transistor.

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6. Detailed Electrical Parameters

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7. Normal-Duty Rating

The normal-duty rating is one of the defining characteristics of this model.

The drive provides:

37 A / 18.5 kW normal duty

This makes it appropriate for industrial motors around the 18.5 kW / 25 HP class when the application’s overload and operating conditions remain within the normal-duty specifications.

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8. Heavy-Duty Rating

For heavier operating conditions, the drive has a lower power rating.

The heavy-duty rating is approximately:

30 A / 15 kW

This is important for applications where the motor experiences greater torque demand, higher acceleration loads or repeated overload conditions.

When selecting the drive, the motor nameplate current should be compared against the appropriate duty rating rather than selecting solely by motor horsepower.

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9. Dimensions

The drive is a Frame 3 configuration.

A commonly listed mechanical dimension for this configuration is:

Height: 454 mm

Width: 190 mm

Depth: 212 mm

Therefore, the approximate physical envelope is:

454 mm × 190 mm × 212 mm

The dimensions should be regarded as the drive-body dimensions for preliminary engineering.

Cabinet fabrication should additionally account for wiring space, ventilation, service access and the manufacturer’s specified clearances.

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10. Weight

The listed drive-body weight is approximately:

12 kg

Some distributors list a substantially higher figure because they may be referring to shipping weight, packaged weight or a different configuration.

For equipment handling, packaging and transport, the actual delivered package weight should therefore be checked separately.

For the product specification table, the commonly listed drive weight is:

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11. Environmental Parameters

The open-type construction means that the drive should not simply be installed in an exposed location.

The final cabinet should provide the appropriate environmental protection for the actual factory environment.

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12. Communication

The model incorporates EtherNet/IP communication.

This is one of the most useful features for automated production systems.

The drive can exchange operating data with a controller through the industrial network.

Typical data includes:

This can reduce the need for extensive hardwired control circuits.

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13. Dynamic Braking

The model includes an internal dynamic-braking transistor.

This is particularly useful when the motor needs to decelerate quickly or when the driven machine has substantial rotational inertia.

During deceleration, energy can flow back toward the DC bus.

The braking system provides a means of managing this regenerated energy through an appropriate braking resistor arrangement.

Potential applications include:

• High-inertia conveyors
• Material-handling systems
• Mixers
• Rotating equipment
• Rapid-stop machinery
• Certain hoisting applications

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14. EMC Filtering

The model uses a filtered configuration with the CM jumper installed.

EMC filtering can help control conducted electrical noise generated by the switching action of the drive.

However, EMC performance depends on the complete installation.

Important factors include:

• Motor cable selection
• Cable length
• Shielding
• Grounding
• Cabinet construction
• Cable routing
• Separation of power and signal wiring
• Installation practices

Therefore, the built-in filtering should be considered part of the EMC solution rather than the entire solution.

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15. Motor Control Functions

The PowerFlex 755 platform supports advanced motor-control functions.

Depending on the motor and application, different control strategies can be configured.

V/Hz Control

V/Hz control is suitable for relatively straightforward motor applications.

Examples include:

• Fans
• Blowers
• Pumps
• Basic conveyors

Vector Control

Vector-oriented control provides improved control of motor speed and torque.

It is more suitable for machines where the load changes significantly or where better speed regulation is required.

Feedback-Based Control

With suitable option hardware, feedback devices can be incorporated into applications requiring higher speed or positioning accuracy.

This can be useful in:

• Positioning machinery
• Winding systems
• Hoisting equipment
• High-performance conveyors
• Precision motion applications

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16. Product Introduction

The 20G11NC037JA0NNNNN is designed as a high-performance industrial variable-speed drive for three-phase AC motors.

Its 18.5 kW normal-duty rating places it in a useful middle range for industrial machinery.

It is not simply intended to switch a motor on and off.

Instead, it provides a controlled electrical interface between the power supply, automation system and motor.

The drive can regulate motor speed, manage acceleration and deceleration, monitor operating conditions and communicate with the supervisory control system.

This makes it useful in production lines where motor operation must be coordinated with other machine functions.

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17. Main Applications

Conveyor Systems

Conveyor systems are one of the most natural applications for this model.

A conveyor may need several different operating speeds during a production cycle.

The drive can provide adjustable speed rather than forcing the motor to run at a single fixed speed.

Controlled acceleration can reduce mechanical shock.

Controlled deceleration can also reduce stress on belts, gearboxes, couplings and transported products.

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Pump Systems

The drive can be used for industrial pump applications.

Variable-speed operation can help match motor speed to process demand.

Typical applications include:

• Water circulation
• Industrial process pumps
• Cooling systems
• Pressure-control systems
• Fluid-transfer equipment
• Treatment systems

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Fan Systems

Industrial fans often do not need to operate at maximum speed continuously.

Variable-speed control can provide a more flexible way to regulate airflow.

Applications include:

• Ventilation
• Exhaust
• Cooling
• Air handling
• Process ventilation

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Blowers

Blower systems can also benefit from variable-speed operation.

The drive can adjust motor speed according to the required process output.

This can be useful in:

• Manufacturing
• Pneumatic systems
• Industrial ventilation
• Process air systems
• Material processing

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Mixers

Industrial mixers may require different speeds during different stages of the production process.

The drive can be programmed to provide appropriate acceleration, running speed and stopping characteristics.

For particularly high-torque mixer applications, the heavy-duty rating must be carefully evaluated.

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Material Handling

Material-handling machinery often requires smooth motor operation.

The drive can help prevent sudden acceleration and deceleration.

This is useful for:

• Feeders
• Conveyors
• Transfer systems
• Automated handling
• Warehouse machinery

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18. Advantages

18.1 High 18.5 kW Normal-Duty Capacity

The 18.5 kW rating provides enough capacity for a wide range of medium-sized industrial motors.

It can cover applications that exceed the lower 11 kW and 15 kW drive classes.

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18.2 15 kW Heavy-Duty Rating

The 15 kW heavy-duty rating provides additional flexibility for demanding machines.

It is useful when the application has higher torque requirements than a basic fan or pump application.

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18.3 Integrated EtherNet/IP

The embedded network interface simplifies integration with industrial automation systems.

It allows control and diagnostic information to be transferred digitally.

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18.4 Internal Dynamic-Braking Transistor

The internal DB transistor provides an important advantage for applications requiring controlled deceleration.

It can reduce the complexity of the basic braking configuration.

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18.5 Integrated EMC Filter

The filtered configuration helps support EMC-conscious machine design.

This is especially useful in installations where drive-generated electrical noise must be controlled.

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18.6 Modular Architecture

The PowerFlex 755 platform uses a modular architecture.

Additional functions can be added through suitable option cards.

Possible expansion areas include:

• Feedback
• Additional communications
• I/O
• Safety
• Encoder interfaces
• Application-specific functions

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18.7 Advanced Diagnostics

The drive can provide diagnostic information useful for maintenance personnel.

This can help identify problems associated with:

• Overcurrent
• Overvoltage
• Undervoltage
• Motor overload
• Ground faults
• Overtemperature
• Communication faults
• Drive configuration

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19. Product Advantages Summary

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20. Five Same-Series or Closely Related Models

The following models can be considered when selecting alternatives around the same PowerFlex 755 product range.

These alternatives should be selected according to motor current rather than horsepower alone.

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21. Same-Series Comparison

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22. Why Choose 20G11NC037JA0NNNNN Instead of a Smaller Model?

The 37 A model is attractive when a machine has outgrown the smaller 22 A or 30 A configurations.

For example, if a motor’s operating current approaches the upper limit of a smaller drive, moving to the 37 A model can provide additional electrical capacity.

The model also provides an 18.5 kW normal-duty rating, which is useful for machines requiring more than 15 kW.

The choice should always be based on actual motor current, overload requirements and duty cycle.

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23. Why Choose It Instead of a Larger Model?

If the motor is around the 18.5 kW range and does not require the capacity of a 22 kW, 30 kW or larger drive, the 37 A model can avoid unnecessary oversizing.

Oversizing a drive can increase:

• Purchase cost
• Cabinet space
• Cooling requirements
• Installation cost
• Spare-parts complexity

A correctly selected 37 A drive can therefore provide a balanced solution for the 18.5 kW normal-duty class.

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24. Five Same-Brand Popular Models

For broader comparison, the following models represent different product positions within the same brand.

These are comparison choices rather than universal drop-in replacements.

Voltage, current, motor type, control requirements, communication, enclosure, braking and mechanical dimensions must all be checked before replacing one drive with another.

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25. Application Comparison

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26. Conveyor Application Example

A conveyor driven by an 18.5 kW motor may need to operate at several different speeds.

During startup, the drive can gradually increase motor frequency and voltage.

This avoids the abrupt mechanical shock associated with direct-on-line starting.

During normal operation, the controller can adjust the speed according to production requirements.

During stopping, the drive can apply a controlled deceleration ramp.

If the conveyor has substantial inertia, the dynamic-braking system can be considered as part of the stopping strategy.

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27. Pump Application Example

A process pump does not necessarily need to operate at full speed all the time.

Using variable-speed control, motor speed can be adjusted according to pressure or flow requirements.

This can improve process control and may reduce unnecessary energy consumption.

The drive can also communicate process and operating information to the automation system.

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28. Fan and Blower Application Example

For ventilation and cooling equipment, airflow requirements may change throughout the production process.

Variable-speed control allows the fan or blower motor to respond to these changing requirements.

This provides a more flexible alternative to simple fixed-speed operation.

The drive can be commanded through the automation network, and operating status can be monitored by the control system.

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29. Mixer Application Example

Mixers can experience significant variations in load.

A low-viscosity material may require relatively little torque, while a high-viscosity material can impose substantially greater mechanical load.

The drive can provide controlled acceleration and adjustable operating speed.

For demanding mixer applications, the 15 kW heavy-duty rating must be checked against the actual motor nameplate current.

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30. Material-Handling Application Example

Material-handling machines often benefit from controlled motor acceleration.

Abrupt starting can cause:

• Mechanical shock
• Belt movement
• Product displacement
• Gearbox stress
• Coupling stress

A variable-speed drive can provide a smoother acceleration profile.

This makes the PowerFlex 755 platform useful for industrial conveying and transfer equipment.

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31. Maintenance Advantages

The drive’s diagnostic capabilities are valuable during maintenance.

Instead of treating a stopped motor as a simple motor problem, maintenance personnel can examine drive status and fault information.

Potential diagnostic categories include:

• Motor overload
• Overcurrent
• DC-bus overvoltage
• DC-bus undervoltage
• Ground fault
• Drive temperature
• Communication problems
• Configuration problems

This can help technicians identify the cause of a machine interruption more quickly.

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32. Cabinet Installation

Because the unit uses an open-type IP20/IP00 construction, it is normally installed inside a suitable electrical enclosure.

The cabinet should provide:

• Adequate environmental protection
• Sufficient ventilation
• Appropriate mounting strength
• Adequate cable space
• Power wiring clearance
• Control wiring clearance
• Network cable routing
• Service access
• Grounding provisions

The approximate 454 × 190 × 212 mm body size should not be interpreted as the minimum cabinet size.

The cabinet must also provide appropriate clearance around the drive.

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33. Installation Parameter Table

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34. Product Strengths at a Glance

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35. Recommended Model Selection

The 20G11NC037JA0NNNNN is therefore positioned between the 15 kW and approximately 22 kW normal-duty classes.

This makes it a useful selection for applications centered around the 18.5 kW motor range.

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36. Technical Advantages Compared with a Basic Drive

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37. Overall Product Assessment

The 20G11NC037JA0NNNNN is best viewed as an advanced industrial variable-frequency drive for medium-power three-phase motors.

Its 37 A / 18.5 kW normal-duty rating gives it enough capacity for many medium-sized industrial machines.

The 15 kW heavy-duty rating makes it useful for applications where the mechanical load is more demanding.

The integrated EtherNet/IP interface makes the drive particularly suitable for automated production systems.

The internal dynamic-braking transistor provides additional flexibility when the driven equipment needs controlled deceleration.

The filtered configuration, CM jumper arrangement, forced-air cooling and modular option architecture further increase its usefulness in industrial applications.

The Frame 3 mechanical configuration provides a practical balance between drive capacity and physical size.

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38. Final Specification Table

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39. Conclusion

The 20G11NC037JA0NNNNN is a PowerFlex 755 industrial AC drive intended for medium-power three-phase motor applications.

Its key rating is 37 A normal duty at 18.5 kW, while the heavy-duty rating is approximately 30 A at 15 kW.

The 400 V three-phase architecture, Frame 3 construction, forced-air cooling, IP20/IP00 open-type enclosure, embedded EtherNet/IP, integrated EMC filtering, DC terminals and internal dynamic-braking transistor give the model a broad range of industrial uses.

It is particularly well suited to conveyors, pumps, fans, blowers, mixers, material-handling equipment, packaging machinery and general process machinery.

One of its strongest characteristics is its ability to combine motor control with industrial communication.

For an automated production line, this means the drive can become part of the overall machine-control architecture rather than operating as an isolated motor controller.

The 37 A rating also makes it a useful intermediate selection between lower-capacity 15 kW-class drives and larger 22 kW or 30 kW-class configurations.

For preliminary mechanical planning, the commonly listed drive-body dimensions are approximately 454 mm high × 190 mm wide × 212 mm deep, with a listed product weight of approximately 12 kg.

For final engineering, cabinet fabrication, replacement or purchasing decisions, the motor nameplate current, duty cycle, overload requirement, ambient conditions, braking requirement, exact frame configuration and final mechanical drawing should always be checked against the specific installation.