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20P41AB038RA0NNN PowerFlex DC Drive — Detailed Product Specifications, Applications, Advantages and Related Models

1. Product Overview

The 20P41AB038RA0NNN is a 10 HP / 7.5 kW regenerative DC drive in the PowerFlex DC series, under the Allen-Bradley brand.

It is designed for industrial DC motor applications where accurate speed control, controlled acceleration and deceleration, reversing, torque regulation, and regenerative braking are required.

The model is rated at 38 A output current and is designed for a 240 (208) V AC, three-phase input. The input configuration is 6-pulse, while the motor-control configuration provides four-quadrant regenerative operation.

The 38 A version occupies an important position in the PowerFlex DC range. It is larger than the 12 A, 20 A, and 29 A versions and is intended for approximately 10 HP / 7.5 kW DC motor applications.

The model uses a Frame A construction with an IP20, NEMA/UL Type Open enclosure and conformal coating. The standard configuration has a blank front plate rather than a HIM operator interface, includes a user manual, and does not include a communication module.

This type of drive is particularly useful for industrial machinery that already uses DC motors. Instead of replacing the complete motor, transmission, mechanical structure, and control system, a compatible DC drive can often be incorporated into a focused retrofit project.

The four-quadrant regenerative design is especially valuable where the motor frequently accelerates, decelerates, reverses, or experiences an overhauling load.

2. Brand and Product Series

Item	Specification
Model	20P41AB038RA0NNN
Brand	Allen-Bradley
Product series	PowerFlex DC
Product type	Regenerative DC Drive
Drive category	Industrial DC Motor Drive
Motor control	DC motor speed and torque control
Motor operation	Four-quadrant
Regenerative operation	Yes
Rated motor power	10 HP
Rated motor power	Approximately 7.5 kW
Output current	38 A
Nominal input voltage	230 V AC
Input voltage class	240 (208) V AC
Input phase	3-phase
Input configuration	6-pulse
Frame size	Frame A
Enclosure	IP20
Enclosure type	NEMA/UL Type Open
Conformal coating	Yes
Field supply	Single-phase regulated
HIM	No HIM / blank plate
Communication module	None in standard configuration
Installation	Protected industrial control cabinet
Typical application	Industrial DC motor systems

3. Product Introduction

The 20P41AB038RA0NNN is designed for applications where a DC motor needs considerably more current capacity than the smaller models in the same family can provide.

Its 38 A output rating and 10 HP / 7.5 kW motor rating make it suitable for medium-sized industrial DC motor systems.

The drive is not simply a basic DC speed controller.

Its four-quadrant regenerative configuration allows the motor to operate in both rotational directions and to transition between motoring and braking conditions.

This is particularly useful in machinery where the motor must repeatedly accelerate and decelerate a significant mechanical load.

A typical example is a winding machine.

During acceleration, the motor supplies mechanical power to the winding system.

During deceleration, the mechanical system can continue driving the motor, placing the drive into a regenerative condition.

The drive therefore has to control the motor in both directions of torque flow.

The 20P41AB038RA0NNN is designed for this type of industrial operating environment.

4. Main Technical Specifications

Parameter	Specification
Model	20P41AB038RA0NNN
Brand	Allen-Bradley
Series	PowerFlex DC
Product type	DC Drive
Motor power	10 HP
Metric motor power	Approximately 7.5 kW
Output current	38 A
Input voltage	240 (208) V AC
Nominal input	230 V AC
Input phase	3-phase
Input topology	6-pulse
Motor operation	Four-quadrant
Regeneration	Yes
Field supply	Single-phase regulated
Frame	Frame A
Enclosure	IP20
Enclosure style	NEMA/UL Type Open
Conformal coating	Yes
HIM	No HIM / blank plate
Communication module	None in standard configuration
Motor type	DC motor
Braking	Regenerative braking
Direction control	Forward and reverse
Approx. width	26.7 cm
Approx. height	36.2 cm
Approx. depth	30.5 cm
Approx. dimensions	26.7 × 36.2 × 30.5 cm
Approx. dimensions	10.5 × 14.3 × 12.0 in
Approx. weight	10.5 kg
Approx. weight	About 23 lb
Installation environment	Protected control cabinet

5. Electrical Characteristics

The 20P41AB038RA0NNN uses a 240 (208) V AC, three-phase input and a 6-pulse input configuration.

The drive has a 38 A output-current rating and is specified for a 10 HP motor class.

The motor-control arrangement is four-quadrant regenerative, which means that the drive is capable of handling both motoring and regenerative braking operation in forward and reverse directions.

Electrical parameter	Value
Input voltage	240 (208) V AC
Nominal voltage	230 V AC
Input phase	3-phase
Input type	6-pulse
Output / armature current	38 A
Motor power	10 HP
Motor power	Approximately 7.5 kW
Motor operation	Four-quadrant
Regenerative operation	Yes
Field supply	Single-phase regulated
Drive frame	Frame A
Enclosure	IP20
Conformal coating	Yes

6. 38 A Output Rating

The 38 A output rating is one of the most important characteristics of this model.

When selecting a DC drive, horsepower alone is not enough.

The motor’s actual armature current must also be considered.

A 10 HP motor does not necessarily operate at exactly the same current under every condition. Actual current depends on motor design, armature voltage, load torque, speed, acceleration, duty cycle, and operating conditions.

For this reason, the 20P41AB038RA0NNN should be selected after checking the actual motor nameplate and machine requirements.

The following motor information should be reviewed before installation:

Motor parameter	Why it matters
Motor power	Confirms approximate drive size
Armature voltage	Determines electrical compatibility
Armature current	Must be matched to drive capacity
Field voltage	Must match the field-supply arrangement
Field current	Important for field circuit sizing
Base speed	Determines normal operating range
Maximum speed	Important for motor safety
Feedback device	Determines speed-control arrangement
Load torque	Determines required drive capacity
Load inertia	Affects acceleration and deceleration
Duty cycle	Determines thermal and overload requirements
Braking requirement	Determines regenerative operating requirements

7. Four-Quadrant Operation

Four-quadrant operation is one of the most important reasons to select this model.

A conventional motor controller may primarily be designed around motoring operation in one direction.

A four-quadrant regenerative drive is different.

It can control motor speed and torque in both forward and reverse directions while also handling regenerative conditions.

Quadrant	Speed	Torque	Operating condition
Quadrant I	Forward	Forward	Forward motoring
Quadrant II	Forward	Reverse	Forward regenerative braking
Quadrant III	Reverse	Reverse	Reverse motoring
Quadrant IV	Reverse	Forward	Reverse regenerative braking

This makes the drive suitable for machinery where the direction of power flow can change during normal operation.

8. Regenerative Braking

Regenerative braking is particularly useful when the mechanical load has significant inertia or when the load can drive the motor during deceleration.

For example, a large roll may be rotating at high speed.

When the machine needs to slow down, the mechanical energy stored in the rotating roll does not disappear.

The motor can be driven by the mechanical load during this process.

The drive therefore needs to manage the electrical energy associated with the braking condition.

The regenerative configuration of the 20P41AB038RA0NNN is designed for this type of operating condition.

This makes it particularly relevant to:

• Winding machines
• Unwinding machines
• Printing lines
• Paper-processing equipment
• Film-processing equipment
• Cable-processing equipment
• Material-handling systems
• Reversing conveyors
• Metal-processing machinery
• Other cyclic DC motor applications

9. Product Applications

9.1 Winding Machines

Winding equipment is one of the strongest application areas for regenerative DC drives.

The motor may need to accelerate a roll, maintain a controlled speed, and then decelerate rapidly.

During winding, the motor is primarily providing mechanical power.

During braking or unwinding, the motor may operate in a regenerative condition.

The four-quadrant architecture makes the 20P41AB038RA0NNN suitable for this type of operation.

9.2 Unwinding Equipment

Unwinding systems often require the motor to provide controlled braking torque.

The material is being pulled by another section of the machine, and the unwinding motor may need to resist the movement.

This can place the motor into a regenerative operating condition.

The drive can therefore be used as part of a tension-control system where maintaining stable material tension is important.

9.3 Printing Machinery

Printing machines often contain multiple rotating sections that must operate at coordinated speeds.

Legacy printing machinery may use DC motors because of their wide speed-control range and torque characteristics.

The 20P41AB038RA0NNN can be used in suitable DC motor sections where controlled speed, acceleration, deceleration, and reversing are required.

Typical applications include:

• Printing rollers
• Feed rollers
• Rewind sections
• Unwind sections
• Auxiliary drives
• Material transport systems

9.4 Paper Processing

Paper-processing equipment can involve continuous material movement and tension control.

The motor may need to alternate between driving and braking conditions.

The regenerative capability of the drive is useful when the machine needs controlled deceleration or when another section of the line drives the motor.

9.5 Film and Plastic Processing

Film and plastic-processing equipment often includes winding and unwinding sections.

The drive can provide controlled motor torque while the material speed changes.

This is particularly important when the machine needs smooth transitions between acceleration, steady operation, and braking.

9.6 Cable and Wire Processing

Cable and wire production equipment can contain multiple winding and unwinding sections.

The drive can help control the speed and torque of the DC motor.

Four-quadrant operation is useful where the motor may need to switch between driving and braking conditions.

9.7 Conveyors

The model can be used with DC-motor-driven conveyors.

For a basic conveyor that runs continuously in one direction, a regenerative drive may provide more functionality than necessary.

However, for conveyors that require:

• Frequent starting
• Frequent stopping
• Controlled deceleration
• Reversing
• Heavy loads
• Large rotating inertia

the four-quadrant configuration can provide significant benefits.

9.8 Material Handling

Material-handling equipment may require controlled acceleration and braking.

The drive can be useful where the mechanical system produces regenerative energy during deceleration.

Examples include legacy roller systems, transport equipment, feeders, and other DC-motor-driven mechanisms.

9.9 Metal Processing

DC drives have historically been used in many metal-processing applications.

Possible applications include:

• Strip handling
• Feeding
• Recoiling
• Tension control
• Rolling-related equipment
• Material transport
• Processing lines

These applications often require stable speed and torque control together with controlled braking.

9.10 Machine Tools

The drive may also be used in selected machine tools with suitable DC motors.

Potential applications include:

• Spindle-related systems
• Feed systems
• Auxiliary drives
• Material positioning
• Machine mechanisms

The exact application must be checked against the motor’s electrical characteristics and the machine’s dynamic requirements.

9.11 Retrofit Projects

Retrofit work is one of the most practical applications for the 20P41AB038RA0NNN.

An older machine may have a perfectly usable DC motor while the original drive has become unreliable or difficult to maintain.

Replacing the drive can be less disruptive than converting the entire machine to an AC motor system.

A retrofit may allow the existing machine to retain:

• DC motor
• Gearbox
• Mechanical transmission
• Motor mounting
• Couplings
• Encoder or tachometer
• Machine structure
• Existing tooling
• Existing control system

10. Main Product Advantages

10.1 Four-Quadrant Regenerative Operation

The primary advantage is four-quadrant regenerative control.

The motor can operate in forward and reverse directions while the drive controls both motoring and regenerative braking.

This is especially valuable in applications involving frequent speed changes.

10.2 38 A Current Capacity

The 38 A output rating provides significantly more capacity than the smaller 12 A, 20 A, and 29 A models.

This places the model in the 10 HP / 7.5 kW class.

For a motor requiring approximately this level of power and current, the 20P41AB038RA0NNN provides a natural fit within the same DC drive family.

10.3 10 HP Motor Class

The 10 HP rating makes the drive suitable for medium-duty industrial machinery.

It provides a useful step between the 7.5 HP and 15 HP classes.

This makes it practical for applications where a 29 A model is too small but a 55 A model would be unnecessarily large.

10.4 DC Motor Retrofit Capability

One of the strongest advantages is compatibility with existing DC motor systems.

When the motor and mechanical system remain in good condition, replacing only the drive can significantly reduce the scope of a modernization project.

10.5 Regenerative Braking

Regenerative braking is particularly valuable in high-inertia applications.

The drive can control the motor when the mechanical load continues driving the motor during deceleration.

This provides a more controlled braking process than simply removing the motor command.

10.6 Conformal Coating

The conformal-coated configuration provides additional protection for electronic components against certain industrial contaminants.

It is important to understand that conformal coating does not change the enclosure rating.

The unit remains an IP20, NEMA/UL Type Open drive and should be installed inside a suitable protected cabinet.

10.7 Compact Frame A Construction

The drive uses a Frame A mechanical configuration.

The commonly listed physical dimensions are approximately 10.5 × 14.3 × 12.0 inches, or approximately 26.7 × 36.2 × 30.5 cm. A commonly listed product weight is approximately 10.5 kg.

For cabinet design, the actual mechanical drawing should always take priority over catalog-style dimensions, especially where cable clearance, mounting space, ventilation, and maintenance access are involved.

10.8 External Control Integration

The standard configuration has no HIM and no communication module.

This makes the model suitable for installations where the machine PLC, external operator panel, or hardwired control system handles the user interface.

The absence of a local HIM can also help keep the front-panel configuration simple in systems where operators are not expected to program the drive directly.

11. Mechanical Specifications

Mechanical parameter	Specification
Model	20P41AB038RA0NNN
Frame size	Frame A
Enclosure	IP20
Enclosure type	NEMA/UL Type Open
Conformal coating	Yes
Cooling	Air cooled
Approx. width	26.7 cm
Approx. height	36.2 cm
Approx. depth	30.5 cm
Approx. dimensions	26.7 × 36.2 × 30.5 cm
Approx. dimensions	10.5 × 14.3 × 12.0 in
Approx. weight	10.5 kg
Approx. weight	About 23 lb
Installation	Protected electrical cabinet
Standalone outdoor installation	Not suitable
Cabinet protection	Required
Service clearance	Required
Cable clearance	Required
Thermal clearance	Required

The available product information is not completely consistent on weight across different commercial listings. Some listings show approximately 20–21 lb, while another lists approximately 23 lb. For that reason, 10.5 kg is best treated as a practical reference value rather than a certified shipping weight.

12. Enclosure and Installation

The IP20 rating means the drive is intended for installation in a protected environment.

It is not a sealed outdoor drive.

The electrical cabinet should protect the drive against conditions such as:

• Water
• Oil
• Excessive dust
• Conductive particles
• Corrosive materials
• Excessive humidity
• Mechanical impact
• Extreme temperature

The conformal coating provides additional protection for the electronics, but proper enclosure design remains necessary.

13. Control Configuration

Feature	Standard configuration
Local HIM	No
Front panel	Blank plate
Communication module	None
User manual	Included
Feedback capability	DC tachometer / encoder capable within the drive architecture
External PLC control	Suitable
External HMI control	Suitable
Analog control	Suitable within available I/O architecture
Digital control	Suitable within available I/O architecture
Regenerative control	Yes
Four-quadrant operation	Yes

The broader PowerFlex DC platform provides flexible feedback and I/O options, including tachometer and encoder capability, making it suitable for applications that require more than basic open-loop speed control.

14. Recommended Same-Series Models

The following five models are closely related models in the same PowerFlex DC family.

They are useful when selecting a drive based primarily on motor current and power requirements.

Model	Series	Input	Output current	Motor power	Input type	Operation	Approx. dimensions	Weight (kg)
20P41AB012RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	12 A	3 HP / 2.2 kW	6-pulse	4-quadrant regenerative	Approx. 26.7 × 36.2 × 30.5 cm	Approx. 10.5
20P41AB020RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	20 A	5 HP / 3.7 kW	6-pulse	4-quadrant regenerative	Approx. 26.7 × 36.2 × 30.5 cm	Approx. 11.8
20P41AB029RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	29 A	7.5 HP / 5.5 kW	6-pulse	4-quadrant regenerative	Approx. 26.7 × 36.2 × 30.5 cm	Approx. 11.8
20P41AB055RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	55 A	15 HP / 11 kW	6-pulse	4-quadrant regenerative	Configuration dependent	Verify
20P41AB073RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	73 A	20 HP / 15 kW	6-pulse	4-quadrant regenerative	Configuration dependent	Verify
20P41AB105RA0NNN	PowerFlex DC	240 (208) V AC, 3-phase	105 A	Higher power class	6-pulse	4-quadrant regenerative	Configuration dependent	Verify

The most directly comparable models are the 29 A and 55 A versions.

The 29 A model is appropriate when the motor is around the 7.5 HP class.

The subject 38 A model moves to approximately 10 HP.

The 55 A model is a logical step upward for approximately 15 HP applications.

The 73 A and 105 A versions are intended for substantially larger DC motor systems.

15. Same-Series Comparison

Parameter	20P41AB012RA0NNN	20P41AB020RA0NNN	20P41AB029RA0NNN	20P41AB038RA0NNN	20P41AB055RA0NNN	20P41AB073RA0NNN
Motor power	3 HP	5 HP	7.5 HP	10 HP	15 HP	20 HP
Approx. kW	2.2	3.7	5.5	7.5	11	15
Output current	12 A	20 A	29 A	38 A	55 A	73 A
Input voltage	208/240 V AC	208/240 V AC	208/240 V AC	208/240 V AC	208/240 V AC	208/240 V AC
Input phase	3-phase	3-phase	3-phase	3-phase	3-phase	3-phase
Input type	6-pulse	6-pulse	6-pulse	6-pulse	6-pulse	6-pulse
Regenerative	Yes	Yes	Yes	Yes	Yes	Yes
Motor operation	Four-quadrant	Four-quadrant	Four-quadrant	Four-quadrant	Four-quadrant	Four-quadrant
Frame	A	A	A	A	A	A
Enclosure	IP20	IP20	IP20	IP20	IP20	IP20
Approx. dimensions	26.7 × 36.2 × 30.5 cm	26.7 × 36.2 × 30.5 cm	26.7 × 36.2 × 30.5 cm	26.7 × 36.2 × 30.5 cm	Verify	Verify
Weight (kg)	Approx. 10.5	Approx. 11.8	Approx. 11.8	Approx. 10.5	Verify	Verify

16. Five Related Same-Brand Popular Models

The following models are useful for broader product comparison.

They belong to related AC drive families rather than being direct DC-drive replacements.

Model	Product family	Drive type	Typical voltage class	Approx. current / power class	Typical application	Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	AC variable-frequency drive	480 V class	Approx. 10 A class	General industrial machinery	Configuration dependent	Verify
25B-D017N104	PowerFlex 525	AC variable-frequency drive	480 V class	Approx. 17 A class	Conveyors, pumps, machinery	Configuration dependent	Verify
22B-D010N104	PowerFlex 40	AC variable-frequency drive	480 V class	Approx. 10 A class	General-purpose machinery	Configuration dependent	Verify
20F11ND034AA0NNNNN	PowerFlex 753	AC drive	480 V class	Approx. 34 A class	Advanced industrial equipment	Configuration dependent	Verify
20G11ND034AA0NNNNN	PowerFlex 755	AC drive	480 V class	Approx. 34 A class	High-performance automation	Configuration dependent	Verify

These alternatives should not be treated as direct replacements for the 20P41AB038RA0NNN.

The 20P41AB038RA0NNN is designed for a DC motor.

The other five models are primarily relevant when a machine is being modernized around an AC motor.

17. PowerFlex 525 as a Related Alternative

A compact PowerFlex 525-type AC drive is more appropriate when the machine is being redesigned around an AC motor.

It is particularly useful for general-purpose machinery, conveyors, pumps, fans, and compact automation systems.

However, moving from the 20P41AB038RA0NNN to an AC drive normally involves more than changing the drive.

The motor, feedback system, braking arrangement, wiring, and control parameters may also need to be changed.

18. PowerFlex 753 as a Related Alternative

A PowerFlex 753-type drive is more appropriate for demanding industrial applications where advanced control and integration are required.

It can be considered when the objective is not simply to replace an existing DC drive but to modernize the machine architecture.

Typical considerations include:

• Advanced motor control
• Feedback
• Networking
• Diagnostics
• PLC integration
• Larger motor systems
• More sophisticated automation requirements

19. PowerFlex 755 as a Related Alternative

The PowerFlex 755 family is oriented toward higher-performance industrial motor control.

It can be a useful alternative for modernization projects where the machine is being converted from a legacy DC architecture to a modern AC architecture.

It should not, however, be connected directly to a DC motor simply because the horsepower rating appears similar.

20. Application Selection Table

Application	Suitability of 20P41AB038RA0NNN	Reason
Winding machine	Excellent	Four-quadrant regenerative control
Unwinding machine	Excellent	Controlled braking and tension
Printing machine	Very good	Stable DC speed control
Paper processing	Very good	Web-speed and tension control
Film processing	Very good	Winding and unwinding
Cable processing	Very good	Controlled winding and braking
Reversing conveyor	Very good	Forward/reverse operation
Heavy conveyor	Very good	Controlled acceleration/deceleration
Material handling	Very good	Regenerative braking capability
Metal processing	Very good	Speed, torque and braking control
Machine tool	Good	Suitable for selected DC systems
Hoisting	Application dependent	Requires complete safety design
Existing DC retrofit	Excellent	Retains existing DC motor
New AC motor system	Not first choice	Better suited to AC-drive architecture

21. Advantages for Winding Applications

The 20P41AB038RA0NNN can be particularly effective in winding applications because the motor can move through several operating conditions during a normal production cycle.

At startup, the motor must accelerate.

During steady-state operation, it maintains a controlled speed or torque.

During a stop, it must decelerate.

During unwinding, it may need to provide braking torque.

These operating states are much easier to manage with a four-quadrant regenerative drive than with a basic one-direction controller.

22. Advantages for Heavy Rotating Loads

A machine with a high-inertia load can be difficult to stop smoothly.

If the motor is simply disconnected, the load can continue rotating.

If braking is too aggressive, the mechanical system can experience excessive stress.

A regenerative drive allows the electrical control system to participate directly in the braking process.

This can provide better control of deceleration and reduce abrupt changes in torque.

23. Advantages for Reversing Machinery

Some machines repeatedly change direction.

Examples include:

• Reversing conveyors
• Reciprocating machinery
• Processing lines
• Positioning systems
• Certain machine tools
• Material-handling systems

The four-quadrant architecture provides a natural fit for these applications because the drive can manage torque in both directions.

24. Advantages for Legacy Equipment

Legacy equipment is often the strongest justification for selecting a PowerFlex DC drive.

The mechanical portion of an old production machine may remain completely usable.

Replacing the drive can therefore be a much smaller project than replacing:

• Motor
• Gearbox
• Coupling
• Encoder
• Mechanical transmission
• Control cabinet
• PLC interface
• Machine tooling

A drive retrofit can focus the engineering effort on the electrical control system.

25. Important Installation Considerations

The drive should be installed inside an appropriate electrical enclosure.

Because the enclosure is IP20 / NEMA/UL Type Open, it should not be exposed directly to water, oil, dust, or other harsh environmental conditions.

Cabinet design should consider:

• Drive dimensions
• Mounting clearance
• Cable bending radius
• Heat generation
• Air circulation
• Adjacent equipment
• Input wiring
• Armature wiring
• Field wiring
• Control wiring
• Feedback wiring
• Grounding
• Service access

26. Thermal Design

The physical dimensions alone do not determine whether a cabinet is suitable.

A drive cabinet must also be evaluated thermally.

The designer should consider:

Thermal consideration	Importance
Ambient temperature	Directly affects drive operating conditions
Drive losses	Determines cabinet heat load
Air circulation	Prevents excessive temperature rise
Adjacent drives	Adds heat to the enclosure
PLC and control equipment	Adds additional heat
Cabinet size	Affects heat dissipation
Ventilation	May be required
Air conditioning	May be required in high-temperature environments
Installation spacing	Helps prevent heat accumulation

27. Motor Matching Checklist

Motor characteristic	Required check
Motor type	DC
Motor power	Approximately 10 HP / 7.5 kW
Armature current	Compatible with 38 A rating
Armature voltage	Compatible with application
Field voltage	Compatible with regulated field supply
Field current	Within applicable field limits
Base speed	Check against operating requirements
Maximum speed	Check against motor limitations
Feedback	Verify encoder/tachometer
Acceleration	Check required torque
Deceleration	Check regenerative requirements
Reversal	Check frequency of direction changes
Duty cycle	Continuous/intermittent requirements
Load inertia	Important for dynamic operation
Mechanical load	Verify torque requirement

28. Recommended Model by Motor Power

Motor power class	Current class	Recommended model	General application
3 HP / 2.2 kW	12 A	20P41AB012RA0NNN	Small DC machinery
5 HP / 3.7 kW	20 A	20P41AB020RA0NNN	Small/medium DC machinery
7.5 HP / 5.5 kW	29 A	20P41AB029RA0NNN	Medium DC machinery
10 HP / 7.5 kW	38 A	20P41AB038RA0NNN	Medium industrial DC machinery
15 HP / 11 kW	55 A	20P41AB055RA0NNN	Larger DC machinery
20 HP / 15 kW	73 A	20P41AB073RA0NNN	Higher-power DC machinery

29. 20P41AB038RA0NNN vs. 20P41AB029RA0NNN

The difference between the 29 A and 38 A models is important when selecting a replacement.

Parameter	20P41AB029RA0NNN	20P41AB038RA0NNN
Motor power	7.5 HP	10 HP
Approx. motor power	5.5 kW	7.5 kW
Output current	29 A	38 A
Input	208/240 V AC, 3-phase	208/240 V AC, 3-phase
Input type	6-pulse	6-pulse
Regenerative	Yes	Yes
Motor operation	Four-quadrant	Four-quadrant
Enclosure	IP20	IP20
Frame	A	A
Approx. dimensions	26.7 × 36.2 × 30.5 cm	26.7 × 36.2 × 30.5 cm
Weight (kg)	Approx. 11.8	Approx. 10.5

30. 20P41AB038RA0NNN vs. 20P41AB055RA0NNN

The 55 A model is the next useful comparison when the motor load is larger.

Parameter	20P41AB038RA0NNN	20P41AB055RA0NNN
Motor power	10 HP	15 HP
Approx. kW	7.5	11
Output current	38 A	55 A
Input voltage class	208/240 V AC	208/240 V AC
Input phase	3-phase	3-phase
Input type	6-pulse	6-pulse
Regenerative	Yes	Yes
Motor operation	Four-quadrant	Four-quadrant
Enclosure	IP20	IP20
Frame	A	A
Dimensions	Approx. 26.7 × 36.2 × 30.5 cm	Configuration dependent
Weight (kg)	Approx. 10.5	Verify

31. Product Advantages at a Glance

Advantage	Explanation
38 A output capacity	Suitable for the 10 HP / 7.5 kW class
Four-quadrant operation	Supports forward/reverse motoring and regenerative braking
Regenerative capability	Useful for frequent braking and high-inertia loads
230 V-class input	Fits common low-voltage industrial systems
6-pulse input	Established industrial power-conversion architecture
Frame A	Compact construction
IP20	Suitable for protected control cabinets
Conformal coating	Additional electronic protection
DC motor compatibility	Useful for legacy DC machinery
Retrofit-friendly	Can reduce the scale of machine modernization
External control	Suitable for PLC/HMI-based machine architecture

32. Limitations and Points to Consider

The 20P41AB038RA0NNN is a specialized DC drive.

Its greatest advantage is also its main limitation: it is intended for DC motor applications.

For a completely new machine using an AC motor, a modern AC drive is generally a more natural choice.

Another consideration is the IP20 enclosure.

The drive requires appropriate cabinet protection.

The standard configuration also does not include a HIM or communication module, so the control system needs to be designed accordingly.

For new projects, product lifecycle and long-term maintenance planning should also be considered. The current product information identifies this specific catalog number as having an end-of-life status, with a stated discontinuation date of April 15, 2027 and no planned direct replacement category.

For existing equipment, however, the model can remain highly relevant where maintaining a DC motor system is the practical objective.

33. Retrofit Evaluation

For a retrofit project, the following sequence is recommended.

First, record the existing motor nameplate.

Second, confirm the armature voltage and current.

Third, verify the field voltage and current.

Fourth, check whether the existing machine uses tachometer or encoder feedback.

Fifth, determine whether four-quadrant operation is required.

Sixth, check the existing control signals.

Seventh, confirm that the cabinet has enough physical and thermal capacity.

Eighth, verify the braking and safety arrangement.

Ninth, compare the existing drive parameters with the new drive configuration.

Finally, perform commissioning with appropriate machine safety procedures.

34. Typical System Architecture

Component	Typical function
DC motor	Mechanical power generation
20P41AB038RA0NNN	Motor speed, torque and regenerative control
Field circuit	Controls motor excitation
Encoder / tachometer	Speed feedback
PLC	Machine sequence control
HMI	Operator interface
Safety circuit	Independent machine safety
Mechanical transmission	Transfers motor power
Braking system	Additional stopping/holding function where required
Control cabinet	Houses and protects electrical equipment

35. Selection Advice

If the existing motor is approximately 10 HP / 7.5 kW and its armature current is compatible with 38 A, the 20P41AB038RA0NNN is a logical member of the same PowerFlex DC family.

If the motor is closer to 7.5 HP and its current requirement is around 29 A, the 20P41AB029RA0NNN may be a better fit.

If the motor is approximately 15 HP and requires around 55 A, the 20P41AB055RA0NNN becomes more appropriate.

The drive should never be oversized or undersized simply because of the horsepower number.

The actual motor current and machine duty should determine the selection.

36. Overall Product Assessment

The 20P41AB038RA0NNN is a 10 HP / 7.5 kW, 38 A regenerative DC drive designed for industrial DC motor applications.

Its core configuration consists of a 240 (208) V AC, three-phase input, 6-pulse power conversion, 38 A output current, four-quadrant regenerative motor operation, single-phase regulated field supply, Frame A construction, and an IP20 NEMA/UL Type Open enclosure.

The approximate physical dimensions are 26.7 × 36.2 × 30.5 cm, while a practical reference weight is approximately 10.5 kg. Different commercial listings show slightly different weights, so the exact mechanical drawing and product documentation should be used for final cabinet and shipping calculations.

The main strength of the product is not simply its 10 HP rating.

Its real value comes from the combination of 38 A capacity, DC motor compatibility, four-quadrant operation, and regenerative braking.

That combination makes it particularly suitable for machinery with frequent acceleration, deceleration, reversing, tension control, or high mechanical inertia.

For winding and unwinding systems, the drive can move between motoring and regenerative conditions.

For printing and paper-processing machinery, it can provide controlled speed and braking.

For conveyors and material-handling systems, it can help manage acceleration, deceleration, and reversing.

For legacy machinery, it can provide a practical route for drive replacement without automatically requiring a complete motor conversion.

37. Quick Reference Table

Parameter	20P41AB038RA0NNN
Brand	Allen-Bradley
Product series	PowerFlex DC
Product type	Regenerative DC Drive
Motor power	10 HP
Metric power	Approximately 7.5 kW
Output current	38 A
Input voltage	240 (208) V AC
Nominal input	230 V AC
Input phase	3-phase
Input type	6-pulse
Motor operation	Four-quadrant
Regenerative operation	Yes
Field supply	Single-phase regulated
Frame	Frame A
Enclosure	IP20
Enclosure type	NEMA/UL Type Open
Conformal coating	Yes
HIM	No HIM / blank plate
Communication module	None in standard configuration
Cooling	Air cooled
Approx. width	26.7 cm
Approx. height	36.2 cm
Approx. depth	30.5 cm
Approx. dimensions	26.7 × 36.2 × 30.5 cm
Approx. dimensions	10.5 × 14.3 × 12.0 in
Approx. weight (kg)	10.5 kg
Motor type	DC motor
Main application	Industrial DC motor control
Particularly suitable for	Winding, unwinding, printing, paper processing, film processing, cable processing, conveyors, material handling, metal processing and DC retrofit projects
Main advantage	Four-quadrant regenerative control
Closest same-series models	20P41AB012RA0NNN, 20P41AB020RA0NNN, 20P41AB029RA0NNN, 20P41AB055RA0NNN, 20P41AB073RA0NNN
Related same-brand models	25B-D010N104, 25B-D017N104, 22B-D010N104, 20F11ND034AA0NNNNN, 20G11ND034AA0NNNNN
Best application direction	Existing 10 HP-class DC motor systems requiring regenerative and four-quadrant operation