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Allen-Bradley 20F11RD3P4AA0NNNNN — PowerFlex 753 AC Drive Detailed Product Description and Selection Guide

1. Product Overview

The 20F11RD3P4AA0NNNNN is a PowerFlex 753 AC variable frequency drive designed for industrial three-phase motor control.

This model is a 380–480 VAC class, three-phase drive with a 3.4 A normal-duty output rating. Its normal-duty motor rating is 2 HP, while the heavy-duty rating is approximately 1.5 HP.

The drive uses an IP20 / NEMA UL Type Open enclosure and belongs to Frame 1. It is an air-cooled configuration intended primarily for installation inside an electrical control cabinet or other suitably protected industrial enclosure.

The catalog configuration includes AC input with precharge and DC terminals, an internal dynamic-braking transistor, an EMC-filtering configuration, and a blank/no-HIM configuration.

One important point for equipment users is that this particular catalog number is now discontinued. The discontinuation does not make existing units unusable; it mainly means that replacement planning should be handled carefully, particularly for machines that have been operating with this drive for many years.

The listed direct replacement configuration is 20F11RD3P4JA0NNNNN, although the actual replacement should still be checked against the machine’s wiring, braking, filtering, control and parameter requirements.

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2. Product Identification

The 6.0 kg figure is the approximate weight associated with the Frame 1 open-type PowerFlex 753 construction. It is more appropriate for cabinet planning than the lighter shipping or reseller package figures that may appear in some commercial listings.

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3. Detailed Electrical Parameters

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4. What the Model Number Represents

The catalog number 20F11RD3P4AA0NNNNN contains several pieces of product information.

The 20F portion identifies the PowerFlex 753 product family.

The 11 section identifies the particular enclosure/frame/input configuration within the catalog structure.

The RD3P4 section is especially important because it identifies the 480 VAC class and 3.4 A current rating.

The 3.4 A rating corresponds to approximately 2 HP normal duty for this configuration.

The remainder of the catalog number defines the factory option arrangement.

For replacement work, the complete catalog number is much more useful than simply identifying the product as a “PowerFlex 753 2 HP drive.” Two drives can have the same horsepower rating but have different input configurations, filtering, braking, HIM or other options.

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5. Product Series — PowerFlex 753

The 20F11RD3P4AA0NNNNN belongs to the PowerFlex 753 series.

PowerFlex 753 is an industrial AC drive platform intended for machinery and automation applications requiring more flexibility than a basic standalone frequency inverter.

The series is designed to cover a wide range of motor sizes, from relatively small motors through much larger industrial motor applications.

This makes it particularly useful when a factory wants to standardize its motor-control equipment around a common drive family.

For example, a production machine could use a smaller PowerFlex 753 drive for a feeder, a medium-sized drive for a conveyor and a larger drive for a main process motor.

The general drive architecture remains familiar across the different power ratings.

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6. Product Introduction

The 20F11RD3P4AA0NNNNN converts incoming three-phase AC electrical power into a controlled variable-frequency output for an AC motor.

The drive controls motor speed by controlling the frequency and voltage supplied to the motor.

This allows a motor to operate at different speeds according to the requirements of the machine.

Instead of using a motor that is permanently connected directly to the incoming power supply, the drive creates a controlled electrical environment for the motor.

This provides several practical benefits.

The motor can accelerate gradually rather than starting instantly at full speed.

It can decelerate according to a programmed ramp.

Its operating speed can be changed during production.

The motor can be stopped in a controlled manner.

The drive can also communicate operating information and fault conditions to the wider control system.

For industrial machinery, these capabilities can make a significant difference to both machine behavior and production consistency.

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7. Main Product Characteristics

7.1 3.4 A Output Rating

The most important electrical characteristic of this model is the 3.4 A continuous output rating.

Its short-term current capability is higher:

This allows the drive to handle short-duration increases in motor load.

The current rating should always be compared with the actual motor nameplate current.

Horsepower alone is not sufficient for final drive selection.

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8. Normal-Duty and Heavy-Duty Ratings

This model has different motor ratings depending on the application duty.

A normal-duty application generally has less demanding overload requirements.

A heavy-duty application may require greater short-term torque and higher overload capability.

This difference is important for applications such as conveyors, feeders and machinery with substantial starting loads.

If a motor is rated 2 HP but the application requires heavy-duty operation, it should not automatically be assumed that the 2 HP normal-duty rating is sufficient.

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9. 380–480 VAC Three-Phase Operation

The drive is intended for the 380–480 VAC three-phase class.

This makes it appropriate for common industrial electrical systems.

The 480 VAC class is widely used in industrial plants and machine-control installations.

The three-phase input also allows the drive to be integrated into conventional industrial three-phase power systems.

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10. Frame 1 Construction

The 20F11RD3P4AA0NNNNN is a Frame 1 drive.

Frame size is important because it determines the physical dimensions and general mechanical arrangement of the drive.

For this model, the approximate open-type Frame 1 dimensions are:

The drive therefore has a relatively narrow cabinet footprint, although it is considerably taller than some compact OEM-oriented VFDs.

The actual cabinet must provide additional room for power connections, control wiring, ventilation and service access.

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11. Air-Cooled Design

The drive is air cooled.

Power semiconductor devices generate heat during normal operation, and the cooling system removes this heat from the drive.

The control cabinet should therefore have adequate ventilation.

Particular attention should be paid to:

• Airflow direction.
• Cabinet temperature.
• Drive spacing.
• Heat generated by neighboring components.
• Dust accumulation.
• Cabinet ventilation.
• Ambient temperature.

Poor heat management can shorten the life of power electronics.

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12. IP20 Open-Type Enclosure

The enclosure is IP20 / NEMA UL Type Open.

This means the drive is intended to be installed inside a suitable electrical cabinet or protected industrial enclosure.

It should not normally be installed where it is directly exposed to:

• Rain.
• Condensation.
• Heavy dust.
• Water spray.
• Corrosive chemicals.
• Uncontrolled outdoor conditions.

The cabinet provides the environmental protection that the open-type drive itself does not provide.

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13. Internal Dynamic-Braking Transistor

The model includes an internal dynamic-braking transistor.

This is an important feature for machinery that needs controlled deceleration.

When a motor decelerates, the motor can return electrical energy to the drive.

The resulting DC-bus voltage can rise.

A dynamic-braking circuit allows this energy to be dissipated through an external braking resistor.

The internal transistor means the switching device required for this function is already incorporated into the drive.

The braking resistor itself is separate and must be selected according to the actual braking requirements.

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14. EMC Filtering

The catalog configuration includes an EMC-filtering arrangement.

The filtering function is useful for reducing electrical noise generated by the switching operation of the drive.

This can be particularly useful in control cabinets containing:

• PLCs.
• Sensors.
• HMIs.
• Communication modules.
• Measurement equipment.
• Safety equipment.
• Other variable-frequency drives.

The filter does not replace good installation practices.

Motor cable routing, grounding, shielding and cabinet layout remain important.

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15. No HIM Configuration

This catalog number is configured with No HIM / blank operator interface.

This means a local Human Interface Module is not supplied as part of the catalog configuration.

For applications where local operation or parameter adjustment is required, the appropriate interface can be considered separately.

For machines controlled primarily through a PLC or another external control system, a permanently installed local keypad may not be necessary.

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16. Embedded I/O and Industrial Integration

The PowerFlex 753 platform provides an industrial control architecture suitable for integration into automation systems.

The drive can participate in machine-control functions such as:

• Start.
• Stop.
• Forward.
• Reverse.
• Speed reference.
• Status monitoring.
• Fault indication.
• Motor control.
• Acceleration control.
• Deceleration control.

This makes it more than a simple frequency converter.

It can act as an important part of the machine’s overall control architecture.

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17. Product Applications

17.1 Conveyor Systems

Small conveyor systems are an excellent application for this drive.

The 2 HP normal-duty rating is appropriate for many small material-transfer systems.

The drive can control:

• Belt speed.
• Start-up acceleration.
• Stop deceleration.
• Direction.
• Production speed.

Controlled acceleration can reduce mechanical shock to belts, couplings and gearboxes.

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18. Small Pumps

The drive can also be used with compatible small three-phase pumps.

Typical applications include:

• Circulation pumps.
• Cooling-water pumps.
• Process pumps.
• Small fluid-transfer systems.
• Industrial water systems.

Variable-speed operation can help match pump output to process demand.

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19. Fans and Blowers

Fans and blowers can also benefit from variable-frequency control.

The motor does not always need to operate at full speed.

By reducing motor speed, the system can provide a lower airflow level when full capacity is unnecessary.

Possible applications include:

• Cooling fans.
• Ventilation equipment.
• Exhaust systems.
• Air-handling machinery.
• Small industrial blowers.

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20. Feeders

Material feeders frequently require controlled speed.

The drive can provide a stable motor speed and allow the feeding rate to be adjusted.

Examples include:

• Packaging feeders.
• Product feeders.
• Material feeders.
• Production-line feeding equipment.

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21. Rollers

Industrial rollers can use a VFD to regulate material movement.

Possible applications include:

• Packaging machinery.
• Material transport.
• Processing equipment.
• Small production lines.
• Roller conveyors.

The ability to adjust speed can be useful when different production products require different operating speeds.

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22. Packaging Equipment

Packaging equipment often contains multiple small motors.

A drive such as the 20F11RD3P4AA0NNNNN can be used for compatible applications involving:

• Feed rollers.
• Conveyors.
• Small pumps.
• Auxiliary mechanisms.
• Material-transfer sections.

Controlled acceleration and deceleration can help reduce product movement and mechanical shock.

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23. Machine Auxiliary Motors

The drive can also serve as an auxiliary motor controller inside a larger machine.

For example, a large production system may contain several small motors.

The main machine may have one large drive while smaller PowerFlex 753 configurations are used for:

• Cooling.
• Feeding.
• Material movement.
• Exhaust.
• Pumping.
• Auxiliary rollers.

This makes the 3.4 A configuration useful even when the overall machine is considerably larger.

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24. Main Product Advantages

24.1 Compact Frame 1 Architecture

The Frame 1 construction provides a relatively narrow drive body.

The width is approximately 110 mm, which can be helpful when cabinet space is limited.

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24.2 2 HP Normal-Duty Capacity

The 2 HP normal-duty rating makes the drive suitable for a broad range of small industrial motors.

It is larger than the 1 HP class while remaining within a compact Frame 1 platform.

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24.3 Industrial-Grade Control

The drive is designed for industrial automation rather than simple consumer motor control.

This provides a stronger foundation for machine integration.

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24.4 Dynamic Braking

The internal braking transistor makes it easier to implement dynamic braking when an application requires faster controlled stopping.

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24.5 EMC Filtering

The filtering configuration helps manage electrical interference within industrial control systems.

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24.6 Flexible Speed Adjustment

The motor speed can be adjusted according to process requirements.

This can improve:

• Production flexibility.
• Process control.
• Machine synchronization.
• Product handling.
• Mechanical smoothness.

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24.7 Consistent Product Family

Because this model belongs to the PowerFlex 753 family, it can be useful for facilities that already have other PowerFlex 753 drives.

Standardizing around one drive family can simplify maintenance and engineering.

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25. Physical Parameters

For engineering drawings, the nominal dimensions should be supplemented with the manufacturer’s required clearances.

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26. Environmental Parameters

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27. Five Recommended Models From the Same Series

The following five models are useful related selections within the PowerFlex 753 family.

These models are particularly useful when the application requires a different motor-current capacity but the same general PowerFlex 753 platform is preferred.

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28. Same-Series Model Selection

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29. Five Popular Related Models From the Same Brand

The following models are useful alternatives when the application does not necessarily need to remain within the PowerFlex 753 family.

The models above should be considered related alternatives, not automatic drop-in replacements.

The PowerFlex 525 and PowerFlex 523 families are generally more attractive when compact size and general-purpose machine control are the priorities.

The PowerFlex 755 family is more appropriate when the application calls for a more advanced industrial drive architecture.

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30. PowerFlex 753 and PowerFlex 525 Comparison

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31. PowerFlex 753 and PowerFlex 523 Comparison

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32. Why Choose the 20F11RD3P4AA0NNNNN?

The model is particularly attractive when the motor is in the 2 HP normal-duty class and the installation already uses the PowerFlex 753 architecture.

The 3.4 A rating gives it more capacity than the 2.1 A model while remaining in the same Frame 1 mechanical family.

This can be useful when a machine contains several small motors with different current requirements.

For example:

This makes the 3.4 A configuration a useful middle point in the small-motor range.

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33. Maintenance Advantages

For maintenance departments, having multiple PowerFlex 753 drives can simplify troubleshooting.

Technicians can become familiar with:

• Similar drive structures.
• Similar parameter concepts.
• Similar fault-handling procedures.
• Similar wiring practices.
• Similar commissioning methods.
• Similar replacement procedures.

This can reduce the learning curve when maintaining multiple machines.

It can also make spare-parts planning easier.

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34. Application Advantages

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35. Important Replacement Notes

The original 20F11RD3P4AA0NNNNN has reached the discontinued stage.

For an existing machine, this does not necessarily mean the entire machine needs to be redesigned.

A direct replacement configuration is available within the same product family, but replacement should still be treated as an engineering task.

The following points should be checked before replacement:

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36. Overall Technical Evaluation

The 20F11RD3P4AA0NNNNN is best described as a compact Frame 1 industrial AC drive for 2 HP normal-duty three-phase motor applications.

Its 3.4 A continuous output, 5.1 A short-duration three-second current capability, 380–480 VAC input class, IP20 open enclosure, internal dynamic-braking transistor, EMC filtering, and air-cooled design make it well suited to small industrial machines.

Its physical dimensions of approximately 400.5 × 110 × 211 mm and approximate weight of 6.0 kg should be considered when planning cabinet installation or replacement.

The drive is particularly useful for conveyors, pumps, fans, feeders, rollers, packaging machinery and other small industrial mechanisms.

Its greatest practical advantage is the combination of a relatively small power rating with the broader PowerFlex 753 industrial architecture.

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37. Final Specification Table

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38. Conclusion

The 20F11RD3P4AA0NNNNN is a PowerFlex 753 AC variable-frequency drive with a 3.4 A output rating and a 2 HP normal-duty motor capacity.

It is designed for 380–480 VAC three-phase industrial power systems and uses a Frame 1, IP20 open-type, air-cooled construction.

Its approximate physical dimensions are 400.5 × 110 × 211 mm, with an approximate weight of 6.0 kg, making these values important when designing or modifying a control cabinet.

The drive is especially suitable for small conveyors, pumps, fans, feeders, rollers, packaging equipment and machine auxiliary motors.

The internal dynamic-braking transistor provides additional flexibility for applications requiring controlled deceleration, while the EMC-filtered configuration helps with electrical-noise management in industrial control cabinets.

For users already operating PowerFlex 753 equipment, this model also has the practical advantage of belonging to the same broader drive platform. Different motor sizes can therefore be handled with closely related drive configurations.

Because the original catalog number is discontinued, replacement selection should not be based solely on horsepower. The motor’s actual current, voltage, duty cycle, braking requirement, control wiring, communications, physical dimensions and installed options should all be checked before selecting a replacement.

For a 2 HP normal-duty, 380–480 VAC three-phase motor application, however, the 20F11RD3P4AA0NNNNN represents a compact and capable industrial drive configuration within the PowerFlex 753 family.