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Allen-Bradley MPL-B4530F-HK72AA Servo Motor

1. Product Overview

The MPL-B4530F-HK72AA is a high-performance permanent-magnet rotary servo motor from the MPL Series of low-inertia servo motors. It is designed for motion-control applications where accurate positioning, controlled acceleration and deceleration, repeatability, and reliable dynamic response are important.

This motor belongs to the 130 mm frame-size class and uses a 76.2 mm magnet stack length. Its relatively low rotor inertia allows the motor to respond quickly to changes in command speed and position, making it particularly suitable for applications involving frequent starts and stops, indexing, positioning, electronic gearing, and coordinated multi-axis motion.

The MPL-B4530F-HK72AA is designed around a 400 V-class AC servo system and is typically used with a compatible servo drive and motion controller. When properly matched with the drive, feedback system, mechanical load, and application requirements, it can provide stable torque production and precise motor control across a wide range of industrial motion applications.

The motor has a nominal maximum speed of approximately 3000 rpm and provides approximately 8.25 N·m of continuous stall torque. Its peak torque capability is approximately 20.3 N·m, giving the motor useful short-duration torque capacity for acceleration, deceleration, and transient load conditions.

The exact suffix configuration is important when selecting a replacement or designing a new system because shaft, feedback, connector, brake, and mounting configurations can differ between apparently similar MPL models.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	MPL Servo Motors
Series	MPL Low-Inertia Permanent-Magnet Rotary Servo Motor
Model	MPL-B4530F-HK72AA
Motor Type	Permanent-magnet rotary servo motor
Motor Construction	Low-inertia servo motor
Frame Size	130 mm class
Magnet Stack	76.2 mm
Electrical Class	400 V AC class
Nominal Voltage Class	Approximately 460 V AC system class
Maximum Speed	Approximately 3000 rpm
Continuous Stall Torque	Approximately 8.25 N·m
Peak Torque	Approximately 20.3 N·m
Rated Output	Approximately 2.1 kW
Feedback	Incremental encoder configuration
Encoder Resolution	Approximately 2000 lines/revolution
Shaft Configuration	Keyless / without shaft key
Integral Brake	No
Shaft Seal	No
Connector	Circular SpeedTec-style DIN connector, right-angle configuration
Mounting	Flange mounting
Approximate Weight	Approximately 5.44 kg
Primary Application	Industrial servo motion and positioning

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3. Main Technical Parameters

Parameter	MPL-B4530F-HK72AA
Model	MPL-B4530F-HK72AA
Motor Type	Permanent-magnet rotary servo motor
Series	MPL Series
Frame Size	130 mm
Magnet Stack Length	76.2 mm
Continuous Stall Torque	Approximately 8.25 N·m
Peak Torque	Approximately 20.3 N·m
Rated Power	Approximately 2.1 kW
Maximum Speed	Approximately 3000 rpm
Rotor Inertia	Approximately 0.0004–0.00044 kg·m²
Feedback Device	Incremental encoder
Feedback Resolution	Approximately 2000 lines/revolution
Feedback Type	Incremental feedback
Shaft	Keyless
Shaft Seal	No
Brake	No integral brake
Mounting Style	Flange mount
Frame Material	Industrial-duty motor housing
Connector	Circular right-angle connector
Electrical Class	400 V AC class
System Voltage Class	Approximately 460 V AC
Cooling	Natural / motor housing heat dissipation
Motor Technology	Permanent-magnet synchronous servo technology
Intended Drive Type	Compatible servo drive
Approximate Weight	Approximately 5.44 kg

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4. Dimensions and Mechanical Parameters

The MPL-B4530F-HK72AA uses a 130 mm frame and a 76.2 mm magnet stack. The motor’s physical envelope is intended for compact industrial machine installation while maintaining the torque capability expected from a servo motor in this power range.

Exact mounting dimensions should always be checked against the mechanical drawing for the specific motor configuration before machining a mounting plate or designing a replacement.

Mechanical Parameter	Specification
Model	MPL-B4530F-HK72AA
Frame Size	130 mm
Magnet Stack Length	76.2 mm
Mounting Type	Flange mounting
Mounting Pattern	IEC-style metric flange mounting
Shaft Type	Keyless
Shaft Key	None
Shaft Seal	None
Integral Holding Brake	None
Connector Orientation	Right-angle
Connector Type	Circular motor/feedback connector
Overall Motor Construction	Compact cylindrical servo motor
Approximate Weight	5.44 kg
Installation Orientation	Suitable for common industrial servo mounting arrangements
Housing	Industrial metal motor housing
Rotor Type	Permanent-magnet rotor
Cooling Method	Natural heat dissipation through motor housing

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5. Electrical and Performance Characteristics

The MPL-B4530F-HK72AA is intended for applications requiring controlled rotary motion rather than simple fixed-speed motor operation.

Its permanent-magnet servo construction provides high torque density and good dynamic response. The motor can rapidly respond to changes in command signals when paired with a suitable servo drive and properly tuned motion system.

The approximately 8.25 N·m continuous stall torque rating gives the motor a substantial continuous torque capability for its frame size. The approximately 20.3 N·m peak torque capability provides additional short-term torque during acceleration, deceleration, positioning, and other transient operating conditions.

Performance Parameter	Typical Specification
Continuous Stall Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Rated Motor Power	Approx. 2.1 kW
Maximum Speed	Approx. 3000 rpm
Motor Frame	130 mm
Magnet Stack	76.2 mm
Rotor Inertia	Approx. 0.0004–0.00044 kg·m²
Motor Technology	Permanent-magnet synchronous
Servo Control	Closed-loop motion control
Feedback	Incremental encoder
Encoder Resolution	Approx. 2000 lines/revolution
Voltage Class	400 V AC class
Approximate Weight	5.44 kg

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6. Feedback and Position Control

One of the important features of the MPL-B4530F-HK72AA is its feedback arrangement.

The motor uses an incremental encoder configuration, allowing the servo drive to monitor motor shaft movement and provide closed-loop control.

Feedback is essential in a servo system because the drive needs information about the actual motor position and speed. The controller can then compare commanded movement with actual movement and make continuous corrections.

This arrangement is particularly useful in machines where position accuracy and repeatability are more important than simply maintaining a constant motor speed.

Typical feedback-related applications include:

• Precision indexing
• Electronic gearing
• Electronic camming
• Coordinated multi-axis movement
• Position registration
• Speed regulation
• Controlled acceleration and deceleration
• High-frequency start/stop motion
• Automatic positioning
• Synchronization between machine axes

The approximately 2000-line-per-revolution incremental encoder provides the feedback resolution required for many industrial motion applications.

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7. Mechanical Configuration

The MPL-B4530F-HK72AA uses a keyless shaft configuration.

A keyless shaft can be advantageous in applications where a suitable clamping hub or coupling is used. Instead of relying on a traditional shaft key, the mechanical connection can be made through an appropriately selected clamping mechanism.

This can provide a clean mechanical connection and can be useful where accurate coupling alignment and compact machine construction are important.

The motor does not include an integral holding brake. This should be considered during machine design, particularly for vertical axes or applications where the load must remain stationary when servo power is removed.

For vertical lifting or gravity-loaded equipment, the machine designer may need an external mechanical holding solution or a motor configuration with an appropriate brake, depending on the required safety concept and load characteristics.

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8. Connector Configuration

The MPL-B4530F-HK72AA uses a circular connector arrangement with a right-angle configuration.

The connector arrangement is intended to provide a practical cable connection while helping keep the motor installation relatively compact.

The right-angle configuration can be particularly useful when motor cable routing space is limited. However, cable bend radius and connector clearance should still be considered during machine design.

Correct mating cables and compatible accessories should be selected according to the complete servo system configuration.

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9. Product Introduction

The MPL-B4530F-HK72AA is designed for industrial automation systems that require a combination of torque, speed control, positioning accuracy, and dynamic response.

Unlike a conventional induction motor used primarily for constant-speed operation, a servo motor is designed to operate as part of a closed-loop motion system.

The motor works together with a servo drive, controller, feedback device, mechanical transmission, and machine load. The controller establishes the desired motion profile, while the drive regulates motor current and torque to achieve the requested movement.

The MPL series low-inertia construction is especially useful in machines where the motor must repeatedly change speed or position.

For example, a packaging machine may need to accelerate a mechanism, move it to an exact position, stop, reverse direction, and repeat the process hundreds or thousands of times. A servo motor with appropriate inertia and torque characteristics is well suited to this type of operating cycle.

The MPL-B4530F-HK72AA provides a useful balance between continuous torque capacity and dynamic response within its frame-size class.

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10. Typical Applications

Packaging Machinery

The motor can be used in packaging equipment where accurate positioning and repeatable motion are required.

Typical applications include:

• Packaging film positioning
• Product indexing
• Cutting mechanisms
• Sealing mechanisms
• Label positioning
• Conveyor synchronization
• Pick-and-place mechanisms

The servo’s closed-loop feedback allows the machine controller to maintain accurate movement even when operating conditions change.

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Material Handling Equipment

Servo motors are frequently used in material-handling systems where controlled acceleration and positioning are required.

Potential applications include:

• Conveyor positioning
• Transfer systems
• Automated sorting
• Indexing conveyors
• Linear actuator drives
• Product transfer mechanisms

The motor’s approximately 20.3 N·m peak torque capability can provide useful short-term torque during acceleration and deceleration.

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Robotics and Pick-and-Place Equipment

The motor can also be considered for industrial automation systems involving repeated positioning movements.

Typical examples include:

• Pick-and-place systems
• Rotary positioning tables
• Automated assembly equipment
• Transfer mechanisms
• Robotic auxiliary axes
• Indexing systems

Servo feedback makes it possible to coordinate the motor with other machine axes.

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Machine Tools

The MPL-B4530F-HK72AA can be suitable for selected machine-tool auxiliary motion applications where controlled speed and position are required.

Possible applications include:

• Automatic tool positioning
• Auxiliary axes
• Indexing tables
• Material feed mechanisms
• Automated adjustment systems

The exact suitability depends on load inertia, required acceleration, duty cycle, speed, torque, and mechanical transmission.

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Printing and Converting Equipment

Printing and converting machines often require synchronized motion between several mechanical sections.

Servo motors can be used for:

• Web positioning
• Roller synchronization
• Registration control
• Feed mechanisms
• Cutting systems
• Tension-related motion
• Indexing mechanisms

The feedback system allows the motor to participate in coordinated motion control.

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Automated Assembly Machines

Automated assembly systems frequently require repeated and highly controlled movement.

The MPL-B4530F-HK72AA can be considered for:

• Component insertion
• Indexing
• Screw-driving mechanisms
• Rotary tables
• Feeding systems
• Transfer mechanisms
• Positioning stations

The motor’s relatively low rotor inertia supports fast response in applications where acceleration and deceleration occur frequently.

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11. Major Advantages

11.1 Low-Inertia Servo Design

The low-inertia construction is one of the main characteristics of the MPL series.

Lower rotor inertia allows the motor to respond quickly to changes in speed and position. This is particularly beneficial for machines with frequent acceleration and deceleration cycles.

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11.2 Strong Continuous Torque Capability

With approximately 8.25 N·m of continuous stall torque, the motor can provide substantial continuous torque for its frame size.

This makes it useful for applications where the motor must maintain controlled torque over extended operating periods.

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11.3 High Peak Torque

The approximately 20.3 N·m peak torque capability provides additional torque during short-duration acceleration or transient load conditions.

This can help the machine achieve the desired motion profile without requiring the motor to operate continuously at its peak torque level.

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11.4 Closed-Loop Feedback

The incremental encoder allows the servo system to continuously monitor motor movement.

This provides considerably better motion control than an open-loop motor system for applications where precise positioning and repeatability are required.

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11.5 3000 rpm Operating Capability

A maximum speed of approximately 3000 rpm gives the motor sufficient speed capability for many industrial positioning and rotary motion applications.

The actual operating speed should be selected based on the load, drive configuration, acceleration profile, mechanical transmission, and motor thermal requirements.

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11.6 Compact 130 mm Frame

The 130 mm frame provides a practical combination of motor size and torque output.

This makes the motor suitable for industrial machinery where installation space matters but the application still requires significant servo torque.

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11.7 Keyless Shaft Configuration

The keyless shaft can simplify certain coupling arrangements.

When used with a properly selected clamping hub or coupling, it can provide a secure mechanical connection without relying on a conventional shaft key.

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11.8 Industrial Motion Control Compatibility

The motor is intended for use as part of a complete industrial servo system.

It can be integrated into systems involving:

• Servo drives
• Motion controllers
• PLC-based automation
• Multi-axis control
• HMI-controlled machines
• Synchronized motion systems

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12. Five Same-Series or Closely Related Models

The following models are useful related choices within the same MPL motor family. Exact electrical, feedback, shaft, connector, and brake configurations should be checked before substituting one model for another.

Model	Series	Frame / Stack	Speed	Continuous Torque	Peak Torque	Approx. Power	Feedback / Configuration	Weight
MPL-B4530F-HJ72AA	MPL	130 mm / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Related feedback configuration	Approx. 5–7 kg
MPL-B4530F-HK74AA	MPL	130 mm / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Related feedback configuration	Approx. 5–7 kg
MPL-B4530F-MJ72AA	MPL	130 mm / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Absolute / high-resolution feedback configuration	Approx. 5–7 kg
MPL-B4530F-MK74AA	MPL	130 mm / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Related absolute feedback configuration	Approx. 5–7 kg
MPL-B4530F-SJ74AA	MPL	130 mm / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Related feedback configuration	Approx. 5–7 kg

Related-Model Selection Notes

The models above share the same general MPL-B4530F motor family characteristics, but the suffix letters and numbers identify differences in the motor configuration.

When selecting between them, the most important factors are:

1. Feedback type.
2. Encoder compatibility.
3. Shaft configuration.
4. Shaft key requirements.
5. Brake requirement.
6. Connector configuration.
7. Servo drive compatibility.
8. Required cable and connector arrangement.
9. Mechanical mounting dimensions.
10. Machine control architecture.

For a replacement application, the complete model number should be matched rather than selecting a motor based only on the first portion of the part number.

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13. Five Popular Related Models from the Same Brand

The following models represent useful alternatives or higher/lower-capacity choices within the broader servo motor product range.

Model	Series / Family	Frame	Speed	Continuous Torque	Peak Torque	Approx. Power	Approx. Weight	Typical Position
MPL-B430P-MK74AA	MPL Low-Inertia	115 mm	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	Approx. 5.5 kg	Higher-speed, lower continuous torque
MPL-B430P-MK72AA	MPL Low-Inertia	115 mm	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	Approx. 5.5 kg	Compact/high-speed motion
MPL-B4530F-MK74AA	MPL Low-Inertia	130 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Approx. 5–7 kg	Similar torque class
MPL-B4540F-MJ74AA	MPL Low-Inertia	130 mm	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	Approx. 8.6 kg	Higher torque application
MPL-B4560F-MJ74AA	MPL Low-Inertia	130 mm class	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	Approx. 11.82 kg	High-torque motion

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14. Comparison of the Main Related Motors

Model	Speed	Continuous Torque	Peak Torque	Power	Frame	Weight	Main Advantage
MPL-B430P-MK74AA	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm	Approx. 5.5 kg	High-speed operation
MPL-B430P-MK72AA	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm	Approx. 5.5 kg	Compact high-speed design
MPL-B4530F-HK72AA	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	Approx. 5.44 kg	Balanced torque and dynamic response
MPL-B4540F-MJ74AA	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	130 mm	Approx. 8.6 kg	Higher continuous and peak torque
MPL-B4560F-MJ74AA	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	130 mm class	Approx. 11.82 kg	High-torque applications

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15. Why the MPL-B4530F-HK72AA Is a Practical Choice

The MPL-B4530F-HK72AA occupies a useful position within the MPL servo motor range.

It is not primarily intended to be the smallest motor in the family, nor is it designed as an extremely high-torque motor. Instead, it provides a balanced combination of motor power, continuous torque, peak torque, speed capability, and relatively compact construction.

For many industrial machines, this balance is more useful than simply selecting the largest available motor.

A properly sized 2.1 kW-class servo can provide enough torque for demanding positioning tasks while avoiding unnecessary motor capacity.

The approximately 3000 rpm maximum speed also fits many machine applications where very high rotational speed is not the primary requirement.

The motor’s feedback capability is another important advantage. Position feedback allows the drive and controller to compensate for changes in load and maintain accurate movement.

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16. Applications Where This Motor Is Especially Suitable

The MPL-B4530F-HK72AA is particularly appropriate for machines characterized by:

• Frequent positioning cycles.
• Repeated acceleration and deceleration.
• High positioning accuracy.
• Coordinated axis movement.
• Variable operating speeds.
• Short motion cycles.
• Rapid indexing.
• Controlled torque.
• Electronic synchronization.
• Closed-loop position control.

It is a good candidate for automation machinery where the motor is required to do more than simply rotate continuously at a fixed speed.

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17. Advantages Compared with Conventional Motors

A conventional motor may be adequate for applications such as fans, pumps, or simple conveyors where precise positioning is not required.

The MPL-B4530F-HK72AA is more appropriate when the machine needs active control over position, speed, acceleration, and torque.

The primary benefits include:

Requirement	Servo Motor Advantage
Precise Positioning	Feedback allows the controller to monitor actual motor movement
Rapid Acceleration	Low rotor inertia supports dynamic response
Controlled Deceleration	Drive can actively control braking torque
Variable Speed	Motor can operate under continuously changing speed commands
Repeatability	Closed-loop control improves repeatable machine movement
Multi-Axis Synchronization	Suitable for coordinated motion systems
Short Motion Cycles	Servo architecture is well suited to frequent movement
Torque Control	Drive can regulate motor torque accurately
Indexing	Precise positioning makes the motor suitable for indexing mechanisms

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18. Important Selection Considerations

When replacing an MPL-B4530F-HK72AA, it is important not to compare motors based solely on rated power.

A servo motor is part of a complete motion system, and several specifications must be matched.

18.1 Feedback Compatibility

The replacement motor must use a feedback system that the servo drive can recognize and support.

A motor with a different encoder arrangement may not be a direct electrical replacement even if its frame size and torque rating appear similar.

18.2 Mechanical Compatibility

The frame, flange, shaft, mounting hole pattern, shaft diameter, connector location, and overall motor length should be checked.

18.3 Torque Requirements

The continuous load torque should remain within the motor’s continuous operating capability.

The acceleration requirement should also be checked against the available peak torque.

18.4 Load Inertia

Load inertia is particularly important in servo applications.

The motor must be capable of accelerating and decelerating the connected load within the required cycle time.

18.5 Speed Requirements

A motor should not be selected solely because its maximum speed appears sufficient.

The actual torque available at the required operating speed and the application’s duty cycle must also be considered.

18.6 Vertical Loads

Because the MPL-B4530F-HK72AA does not have an integral holding brake, applications involving vertical or gravity-driven loads require additional consideration.

A suitable mechanical holding method may be necessary.

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19. Recommended Application Matching

Application Type	Suitability	Reason
Packaging Equipment	Excellent	Fast and repeatable positioning
Indexing Machine	Excellent	Good closed-loop motion control
Pick-and-Place	Excellent	Suitable dynamic response
Automated Assembly	Excellent	Precise positioning capability
Material Transfer	Very Good	Controlled acceleration and positioning
Printing Machinery	Very Good	Suitable for synchronized motion
Converting Machinery	Very Good	Useful for controlled rotary movement
Machine Tool Auxiliary Axis	Very Good	Servo positioning capability
Simple Constant-Speed Fan	Generally unnecessary	Servo features may be excessive
Simple Pump Application	Generally unnecessary	Conventional motor technology may be more appropriate

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20. Overall Product Advantages

The main advantages of the MPL-B4530F-HK72AA can be summarized as follows:

• 130 mm industrial servo motor frame.
• Approximately 2.1 kW rated power class.
• Approximately 8.25 N·m continuous stall torque.
• Approximately 20.3 N·m peak torque.
• Approximately 3000 rpm maximum speed.
• Permanent-magnet servo technology.
• Low-inertia motor construction.
• Closed-loop incremental encoder feedback.
• Approximately 2000-line encoder resolution.
• Keyless shaft configuration.
• Compact industrial construction.
• Right-angle circular connector arrangement.
• Suitable for high-cycle automation.
• Suitable for precision positioning.
• Suitable for coordinated motion.
• Suitable for repeated acceleration and deceleration.
• Good balance between torque capacity and dynamic response.

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21. Technical Summary

Category	Detailed Information
Product	Servo Motor
Model	MPL-B4530F-HK72AA
Brand	Allen-Bradley
Series	MPL Series
Motor Family	Low-Inertia Permanent-Magnet Rotary Servo
Frame Size	130 mm
Magnet Stack	76.2 mm
Rated Power	Approx. 2.1 kW
Continuous Stall Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Maximum Speed	Approx. 3000 rpm
Rotor Inertia	Approx. 0.0004–0.00044 kg·m²
Feedback	Incremental encoder
Encoder Resolution	Approx. 2000 lines/revolution
Shaft	Keyless
Shaft Seal	No
Integral Brake	No
Mounting	Flange
Connector	Circular right-angle configuration
Electrical Class	400 V AC class
Approx. Weight	5.44 kg
Main Use	Industrial motion control
Control Method	Closed-loop servo control
Typical Machines	Packaging, indexing, assembly, material handling, printing, converting, machine automation

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22. Final Product Description

The MPL-B4530F-HK72AA is a 130 mm-frame, low-inertia permanent-magnet servo motor designed for industrial motion-control applications requiring reliable torque, accurate positioning, and responsive dynamic performance.

With approximately 2.1 kW of motor power, 8.25 N·m of continuous stall torque, 20.3 N·m of peak torque, and a maximum speed of approximately 3000 rpm, it provides a well-balanced solution for medium-duty precision motion applications.

Its incremental encoder feedback allows the motor to operate as part of a closed-loop servo system, providing the controller with information about motor movement and allowing the drive to regulate the motor accurately.

The low-inertia design is especially valuable in applications that require frequent acceleration and deceleration. Packaging machines, indexing equipment, automated assembly systems, material-handling mechanisms, printing equipment, and other automated production machinery can benefit from this type of servo motor.

The keyless shaft and right-angle connector configuration provide a practical mechanical and electrical arrangement for machine integration, while the 130 mm frame provides a useful balance between physical size and torque capacity.

The absence of an integral brake should be considered during system design. If the motor is used on a vertical axis or another application where the load must remain mechanically secured when power is removed, an appropriate external holding solution or a brake-equipped motor configuration may be required.

Overall, the MPL-B4530F-HK72AA is best viewed as a versatile industrial servo motor for applications where precise closed-loop control, repeatable positioning, controlled speed, and dynamic response are more important than simple constant-speed operation.