Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

1. Product Overview

The MPL-A4540F-HJ72AA is a 240 V-class AC rotary servo motor from the MP-Series MPL low-inertia brushless servo motor family.

It is a 130 mm frame-size servo motor with a 101.6 mm magnet stack, designed for industrial motion-control applications where controlled acceleration, accurate speed regulation, repeatable positioning and relatively high dynamic performance are required.

The model is configured for 3000 rpm operation and uses a 2000-line incremental encoder for feedback. It has a keyed shaft extension, a right-angle SpeedTEC DIN connector, a connector arrangement that can be rotated through 180°, and no integral holding brake.

The model belongs to the low-inertia category, making it particularly appropriate for machinery that frequently changes speed or performs repeated positioning cycles.

A notable point when comparing this motor with other MPL models is the H feedback configuration. The H configuration uses a 2000-line incremental encoder, while other MPL variants may use single-turn or multi-turn high-resolution feedback.

2. Brand and Product Classification

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Product Type	AC Rotary Servo Motor
Model	MPL-A4540F-HJ72AA
Voltage Class	200/240 V AC class
Nominal Voltage	230/240 V AC
Frame Size	45 / 130 mm
Magnet Stack	40 / 101.6 mm
Rated Speed	3000 rpm
Feedback	2000-line incremental encoder
Shaft	Keyed shaft extension
Brake	No brake
Connector	SpeedTEC DIN
Connector Orientation	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric
Mounting Holes	Free mounting holes, Type FF
Servo Category	Low-inertia brushless servo motor

3. Main Technical Parameters

The following table summarizes the principal characteristics of the MPL-A4540F-HJ72AA.

Parameter	Specification
Model	MPL-A4540F-HJ72AA
Motor Type	Brushless AC servo motor
Rated Voltage	230/240 V AC
Voltage Class	200 V class
Rated Speed	3000 rpm
Continuous Stall Torque	Approximately 10.2 N·m
Peak Torque	Approximately 27.1 N·m class
Frame Size	130 mm
Magnet Stack Length	101.6 mm
Magnet Stack	4.0 in
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution
Feedback Type	Incremental
Shaft	Keyed
Shaft Seal	No shaft seal in the standard HJ72AA configuration
Brake	No brake
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Mounting Hole Type	Free mounting holes / Type FF
Enclosure	IP50 housing; higher shaft protection depends on sealing configuration
Approx. Product Weight	9.5 kg
Frame Dimension	130 mm
Magnet Stack Dimension	101.6 mm
Overall Motor Dimensions	Determined by the complete mechanical drawing
Application Class	Industrial motion control

The 130 mm frame size and 101.6 mm magnet-stack length are directly associated with the model designation. The 3000 rpm speed and 2000-line incremental encoder are also characteristic specifications of this exact configuration.

The commonly listed catalog weight is approximately 9.5 kg. Some secondary listings express the physical weight differently, so for shipping and mechanical-support calculations it is preferable to use the manufacturer’s dimensional/mechanical documentation for the final installation value.

4. Dimensions and Mechanical Structure

The MPL-A4540F-HJ72AA uses a 130 mm frame and a 101.6 mm magnet stack.

The 130 mm dimension represents the motor frame class rather than the complete external length of the motor.

The 101.6 mm figure represents the active magnet-stack length and corresponds to the 4.0-inch stack designation.

Therefore, these two values should not be interpreted as the complete motor envelope.

Mechanical Parameter	Value
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	101.6 mm
Magnet Stack Designation	40
Magnet Stack	4.0 in
Shaft Type	Keyed
Mounting	IEC metric flange
Mounting Hole Configuration	Free mounting holes / Type FF
Connector	Right-angle SpeedTEC DIN
Connector Rotation	180°
Approx. Weight	9.5 kg
Complete Overall Length	Application/mechanical drawing dependent
Complete Overall Width	Application/mechanical drawing dependent
Complete Overall Height	Application/mechanical drawing dependent

For machine fabrication, the 130 mm frame size and 101.6 mm stack length should not be used as a substitute for the complete dimensional drawing.

The shaft projection, flange, connector, mounting-hole position and rear housing all contribute to the actual installation envelope.

5. Meaning of the MPL-A4540F-HJ72AA Model

The ordering code contains several useful pieces of product information.

Code	General Identification
MPL	Low-inertia brushless servo motor family
A	Motor construction/configuration
45	130 mm frame class
40	101.6 mm magnet stack
F	3000 rpm class
H	2000-line incremental encoder configuration
J	Keyed shaft configuration
72	Connector/configuration designation
AA	Configuration suffix

The F designation is associated with the 3000 rpm configuration, while the H designation identifies the incremental encoder family. The J configuration corresponds to the keyed shaft arrangement.

The complete ordering code should always be considered as a whole because individual letters and numbers are part of a defined configuration rather than independent options that can necessarily be mixed freely.

6. Product Introduction

The MPL-A4540F-HJ72AA is designed for industrial automation equipment requiring servo-controlled rotary motion.

Unlike a conventional induction motor, the servo motor is intended to operate as part of a closed-loop motion-control system.

The servo drive controls the motor’s electrical current and operating conditions while receiving feedback from the encoder.

This arrangement allows the machine controller to command:

• Position.
• Speed.
• Acceleration.
• Deceleration.
• Torque.

The motor’s 3000 rpm rating makes it more speed-oriented than the 1500 rpm C-class models in the same general frame and stack family.

At the same time, its 130 mm frame and 101.6 mm stack provide a substantial motor package suitable for demanding industrial machinery.

The low-inertia design is especially useful for machinery with frequent motion changes because the motor can respond efficiently to changes in the commanded operating condition.

7. Feedback System

One of the most important features of the MPL-A4540F-HJ72AA is its 2000-line incremental encoder.

Feedback Parameter	Specification
Feedback Type	Incremental encoder
Encoder	2000-line
Resolution	2000 lines/revolution
Feedback Category	Incremental
Application	Closed-loop motion control
Primary Function	Position and speed feedback

The encoder provides rotational feedback to the servo system.

During operation, the controller can use this information to determine motor movement and regulate the motor according to the commanded motion profile.

This is particularly useful for applications where the motor must repeatedly move between known positions or maintain a controlled rotational speed.

The incremental feedback configuration is different from the absolute high-resolution feedback used by certain S- and M-series variants within the MPL family.

8. Keyed Shaft Design

The MPL-A4540F-HJ72AA uses a keyed shaft extension.

This is an important distinction when selecting the mechanical coupling.

A keyed shaft can be used with compatible keyed couplings, pulleys, gears and other transmission components.

When replacing another servo motor, the following mechanical characteristics should be checked:

Mechanical Check	Requirement
Shaft Diameter	Must match coupling
Shaft Length	Must provide adequate engagement
Keyway	Must match mating component
Coupling Type	Compatible keyed coupling
Flange	Must match machine mounting
Bolt Pattern	Must match mounting structure
Radial Load	Must remain within permissible limit
Axial Load	Must remain within permissible limit
Alignment	Must be accurately maintained
Connector Clearance	Must allow cable connection

The keyed shaft is particularly useful in conventional machine designs where the transmission system already uses keyed mechanical components.

9. Brake Configuration

The standard MPL-A4540F-HJ72AA is a no-brake configuration.

This means that the motor should not be treated as a mechanical holding device when power is removed.

For horizontal motion systems, this may not present a problem.

For vertical or gravity-loaded axes, however, the design should consider whether an independent holding mechanism or a brake-equipped motor configuration is required.

Application	Brake Consideration
Horizontal conveyor	Usually no holding brake required
Rotary indexing	Depends on machine design
Horizontal positioning	Often suitable without brake
Vertical lifting	Additional holding protection may be required
Gravity-loaded axis	Brake or external holding system may be necessary
Safety holding application	Separate safety design required

This is an important selection point when comparing the HJ72AA with HJ74AA-type configurations, because the related HJ74AA version is associated with a brake option.

10. Connector Configuration

The motor uses a SpeedTEC DIN connector in a right-angle configuration.

The connector arrangement can be rotated through 180°.

This provides useful flexibility when the motor is mounted in a restricted machine space.

For example, the connector can be positioned to help avoid interference with:

• Machine frames.
• Protective covers.
• Adjacent motors.
• Gearboxes.
• Linear guideways.
• Cable carriers.
• Electrical cabinets.
• Mechanical transmission components.

The connector configuration is therefore not merely an electrical detail; it can also affect the practical installation layout of the complete machine.

11. Main Product Advantages

11.1 3000 RPM Operating Class

The 3000 rpm rating gives the MPL-A4540F-HJ72AA a useful balance between rotational speed and servo torque capability.

It is suitable for equipment requiring faster cyclic movement than typical 1500 rpm servo applications.

11.2 Low-Inertia Design

The MPL family is designed around low-inertia brushless servo technology.

Low motor inertia can make it easier for the servo system to respond to acceleration and deceleration commands.

This is useful for:

• Indexing machines.
• Packaging equipment.
• Pick-and-place machinery.
• Automated assembly.
• Cutting equipment.
• Printing machinery.

11.3 2000-Line Incremental Feedback

The 2000-line encoder provides useful rotational feedback for closed-loop control.

It offers considerably more feedback information than a simple low-resolution pulse sensor and supports accurate servo control when properly matched with the drive and controller.

11.4 Keyed Shaft

The keyed shaft provides a familiar mechanical interface for industrial machinery.

It is especially convenient for machines that already use:

• Keyed couplings.
• Keyed pulleys.
• Keyed gearboxes.
• Timing-belt systems.
• Rotary transmission components.

11.5 Rotatable Right-Angle Connector

The 180° rotatable connector can simplify machine wiring.

This is particularly useful in compact machine designs where the motor is close to other components.

11.6 130 mm Industrial Frame

The 130 mm frame provides a substantial mechanical platform while remaining smaller than larger 165 mm-frame servo configurations.

This makes the model useful for medium-duty industrial motion applications.

12. Product Applications

12.1 Packaging Machinery

Packaging machinery is one of the natural application areas for low-inertia servo motors.

The motor can be used for:

• Product indexing.
• Film feeding.
• Cutter positioning.
• Sealing mechanisms.
• Conveyor synchronization.
• Label positioning.
• Rotary indexing.

The 3000 rpm operating class can be useful when the machine needs relatively fast cyclic motion.

12.2 Material Handling Equipment

The motor can be integrated into automated material-handling machinery.

Potential applications include:

• Transfer mechanisms.
• Servo conveyors.
• Positioning systems.
• Automated sorting.
• Indexing mechanisms.
• Product orientation.

12.3 Printing and Converting Machinery

Servo motors are widely used in printing and converting systems where speed synchronization and repeatable movement are important.

Possible applications include:

• Feed rollers.
• Web handling.
• Registration systems.
• Cutting mechanisms.
• Roll positioning.
• Material feeding.

12.4 Automated Assembly

The motor can be used in automated assembly equipment requiring controlled rotary movement.

Examples include:

• Rotary indexing tables.
• Component positioning.
• Tool positioning.
• Transfer mechanisms.
• Assembly stations.
• Automated fixtures.

12.5 Machine Tools

The motor can also be used for controlled machine movement.

Potential applications include:

• Feed mechanisms.
• Rotary axes.
• Positioning axes.
• Automated tooling.
• Indexing systems.

12.6 Pick-and-Place Equipment

Pick-and-place machinery frequently requires rapid acceleration and deceleration.

The low-inertia characteristics of the motor can be useful in these cyclic applications, provided the complete inertia ratio, load torque and acceleration requirements are within the selected motor/drive combination.

13. Typical Application Parameters

Application	Typical Motion Requirement	Reason This Motor May Be Considered
Packaging	Fast indexing	3000 rpm servo operation
Labeling	Accurate feed	Closed-loop encoder feedback
Cutting	Repeated positioning	Servo-controlled motion
Assembly	Rotary positioning	Precise feedback
Conveyor	Speed control	Closed-loop operation
Printing	Synchronization	Encoder-based motion control
Material handling	Controlled acceleration	Low-inertia motor construction
Indexing table	Repeated angular positioning	Servo positioning
Machine tooling	Feed/position control	Closed-loop servo system
Pick-and-place	Rapid cyclic movement	3000 rpm and low-inertia design

14. Five Same-Series or Closely Related Models

The following models are closely related to the MPL-A4540F-HJ72AA. Several use the same 130 mm frame and 101.6 mm magnet-stack class but change the feedback type, shaft configuration or brake configuration.

Model	Series	Speed	Frame	Stack	Feedback	Shaft	Brake	Dimensions	Weight
MPL-A4540F-HJ74AA	MPL	3000 rpm	130 mm	101.6 mm	2000-line incremental	Keyed	Yes	130 mm frame × 101.6 mm stack	Approx. 13 kg
MPL-A4540F-HK72AA	MPL	3000 rpm	130 mm	101.6 mm	Encoder configuration variant	Keyed	No	130 mm frame × 101.6 mm stack	Approx. 9.5 kg
MPL-A4540F-MJ72AA	MPL	3000 rpm	130 mm	101.6 mm	Multi-turn high-resolution	Keyed	No	130 mm frame × 101.6 mm stack	Approx. 9.5 kg
MPL-A4540F-SJ72AA	MPL	3000 rpm	130 mm	101.6 mm	Single-turn high-resolution	Keyed	No	130 mm frame × 101.6 mm stack	Approx. 9.5 kg
MPL-A4540F-SK72AA	MPL	3000 rpm	130 mm	101.6 mm	Single-turn high-resolution	Keyless	No	130 mm frame × 101.6 mm stack	Approx. 9.5 kg

The closely related HJ74AA version is particularly relevant where a brake is needed. The HJ72AA and HJ74AA share the same general 3000 rpm, 130 mm frame and 101.6 mm stack class, while the brake configuration differs.

The MJ and SJ configurations move from incremental feedback toward multi-turn or single-turn high-resolution feedback respectively. The SK configuration also changes the shaft from keyed to keyless.

15. Detailed Comparison of Related Models

Parameter	MPL-A4540F-HJ72AA	MPL-A4540F-HJ74AA	MPL-A4540F-MJ72AA	MPL-A4540F-SJ72AA	MPL-A4540F-SK72AA
Speed	3000 rpm	3000 rpm	3000 rpm	3000 rpm	3000 rpm
Frame	130 mm	130 mm	130 mm	130 mm	130 mm
Stack	101.6 mm	101.6 mm	101.6 mm	101.6 mm	101.6 mm
Feedback	2000-line incremental	2000-line incremental	Multi-turn high-resolution	Single-turn high-resolution	Single-turn high-resolution
Shaft	Keyed	Keyed	Keyed	Keyed	Keyless
Brake	No	Yes	No	No	No
Connector	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN
Connector	Right-angle	Right-angle	Right-angle	Right-angle	Right-angle
Connector Rotation	180°	180°	180°	180°	180°
Mounting	IEC metric	IEC metric	IEC metric	IEC metric	IEC metric
Approx. Weight	9.5 kg	13 kg	9.5 kg	9.5 kg	9.5 kg
Dimension Reference	130 × 101.6 mm	130 × 101.6 mm	130 × 101.6 mm	130 × 101.6 mm	130 × 101.6 mm

16. Five Additional Same-Brand Popular/Relevant Models

The following models are useful additional references within the same general motion-control product range. They cover different frame sizes and stack lengths, so they should be selected according to actual machine requirements rather than treated as direct replacements.

Model	Product Family	Speed	Frame	Stack	Feedback	Shaft	Brake	Dimensions	Weight
MPL-A520K-SK72AA	MP-Series MPL	4000 rpm	165 mm	50.8 mm	Single-turn high-resolution	Keyless	No	165 × 50.8 mm	Approx. 11 kg class
MPL-A540F-MJ74AA	MP-Series MPL	3000 rpm	165 mm	101.6 mm	Multi-turn high-resolution	Keyed	Yes	165 × 101.6 mm	Approx. 17 kg class
MPL-A540K-SJ72AA	MP-Series MPL	4000 rpm	165 mm	101.6 mm	Single-turn high-resolution	Keyed	No	165 × 101.6 mm	Approx. 14 kg class
MPL-A4560F-SJ72AA	MP-Series MPL	3000 rpm	130 mm	152.4 mm	Single-turn high-resolution	Keyed	No	130 × 152.4 mm	Approx. 12 kg class
MPL-A4560F-SK72AA	MP-Series MPL	3000 rpm	130 mm	152.4 mm	Single-turn high-resolution	Keyless	No	130 × 152.4 mm	Approx. 12 kg class

The broader MPL catalog includes 130 mm-frame 60-stack models and 165 mm-frame models, providing additional choices when the application requires a different torque, inertia or speed combination.

For the models in this table where exact shipping weight can vary by configuration or documentation convention, the values are shown as approximate selection figures rather than being presented as exact mechanical weights.

17. Comparison With the Main Model

Characteristic	MPL-A4540F-HJ72AA	MPL-A4560F-SJ72AA	MPL-A4560F-SK72AA	MPL-A520K-SK72AA	MPL-A540F-MJ74AA
Frame	130 mm	130 mm	130 mm	165 mm	165 mm
Stack	101.6 mm	152.4 mm	152.4 mm	50.8 mm	101.6 mm
Speed	3000 rpm	3000 rpm	3000 rpm	4000 rpm	3000 rpm
Feedback	Incremental	Single-turn	Single-turn	Single-turn	Multi-turn
Shaft	Keyed	Keyed	Keyless	Keyless	Keyed
Brake	No	No	No	No	Yes
Relative Size	Medium	Longer-stack	Longer-stack	Larger frame	Larger frame
Main Difference	Reference model	Longer stack	Longer stack/keyless	Larger frame/higher speed	Larger frame/brake
Weight	9.5 kg	Approx. 12 kg	Approx. 12 kg	Approx. 11 kg class	Approx. 17 kg class

18. Advantages for Equipment Designers

The MPL-A4540F-HJ72AA offers several characteristics that can make it practical for machine builders.

First, the 3000 rpm rating gives the motor a relatively high operating speed for its frame class.

Second, the low-inertia rotor design is suitable for repeated acceleration and deceleration.

Third, the 2000-line incremental encoder provides feedback required for closed-loop servo operation.

Fourth, the keyed shaft is convenient for conventional industrial transmission arrangements.

Fifth, the rotatable right-angle connector can help with machine packaging and cable routing.

Finally, the 130 mm frame and 101.6 mm stack place the motor in a useful medium-size industrial servo category.

19. Important Selection Points

The model should be selected according to the complete machine load rather than by horsepower or speed alone.

The following factors are particularly important:

Selection Item	Recommended Check
Continuous Torque	Must exceed the continuous machine torque requirement
Peak Torque	Must accommodate acceleration and short-duration loads
Speed	Machine maximum speed must remain within motor limits
Inertia	Load inertia must be suitable for servo tuning
Acceleration	Required acceleration must be achievable
Deceleration	Required stopping performance must be achievable
Feedback	Drive must support the 2000-line incremental encoder
Shaft	Machine coupling must match keyed shaft
Brake	Determine whether the application requires a holding brake
Environment	Temperature and contamination must be considered
Cable	Correct motor power and feedback cables required
Mounting	Flange and mounting-hole dimensions must match
Connector	Adequate rear/side clearance must be provided
Weight	Machine structure must support approximately 9.5 kg motor weight
Duty Cycle	Continuous and intermittent loads must be evaluated

20. Applications Where This Model Is Particularly Relevant

Application Type	Typical Motion	Main Requirement
Packaging	Indexing and feeding	Fast repeated motion
Conveyor Systems	Speed regulation	Stable closed-loop control
Rotary Indexing	Angular positioning	Repeatability
Printing	Roller synchronization	Speed coordination
Cutting	Feed and cut positioning	Fast response
Assembly	Tool/component positioning	Accurate motion
Pick-and-Place	Repeated acceleration	Low inertia
Material Handling	Transfer and positioning	Controlled movement
Machine Tools	Feed/axis motion	Servo positioning
Automated Production	Multi-axis coordination	Closed-loop motion

21. Practical Replacement Considerations

When replacing an existing motor with the MPL-A4540F-HJ72AA, it is not enough to compare only the frame size.

The following characteristics should be matched:

1. Frame size

The replacement motor must physically fit the machine mounting structure.

2. Stack length

The 101.6 mm stack is an important part of the motor configuration.

3. Speed

The HJ72AA is a 3000 rpm configuration.

4. Feedback

The motor uses a 2000-line incremental encoder. A servo drive configured for another encoder type may not be directly compatible.

5. Shaft

The model has a keyed shaft.

6. Brake

The standard HJ72AA configuration has no brake.

7. Connector

The motor uses a right-angle SpeedTEC DIN connector.

8. Mechanical clearance

The connector and cable routing must be included in the machine installation envelope.

9. Drive compatibility

The servo drive must be compatible with the motor’s voltage, current and feedback requirements.

10. Load inertia

The machine’s reflected load inertia should be checked before final selection.

22. Main Model Versus 1500 RPM MPL Configuration

A useful comparison can be made between the 3000 rpm MPL-A4540F-HJ72AA and the 1500 rpm MPL-A4540C configurations.

Parameter	MPL-A4540F-HJ72AA	MPL-A4540C-SK72AA
Frame	130 mm	130 mm
Stack	101.6 mm	101.6 mm
Rated Speed	3000 rpm	1500 rpm
Feedback	2000-line incremental	Single-turn high-resolution
Shaft	Keyed	Keyless
Brake	No	No
Connector	SpeedTEC DIN	SpeedTEC DIN
Mounting	IEC metric	IEC metric
Weight	Approx. 9.5 kg	Approx. 9.5 kg
Primary Difference	Higher-speed incremental configuration	Lower-speed absolute-feedback configuration

The comparison illustrates why the complete model number matters. Two motors can have the same frame and stack dimensions but still have substantially different feedback and mechanical configurations.

23. Product Advantages Summary

Advantage	Practical Benefit
3000 rpm	Suitable for relatively fast machine cycles
Low inertia	Good response to acceleration/deceleration commands
2000-line encoder	Closed-loop speed and position feedback
Keyed shaft	Compatible with conventional keyed transmission systems
130 mm frame	Medium-size industrial servo package
101.6 mm stack	Substantial electromagnetic active length
Right-angle connector	Convenient for compact machine layouts
180° connector rotation	Flexible cable routing
No-brake configuration	Suitable for many horizontal motion systems
IEC metric mounting	Convenient for metric machine construction
Approx. 9.5 kg	Manageable for industrial machine mounting

24. Final Product Summary

The MPL-A4540F-HJ72AA is a 3000 rpm low-inertia brushless AC rotary servo motor belonging to the MP-Series MPL servo motor family.

Its principal configuration consists of a 130 mm frame, 101.6 mm magnet stack, 2000-line incremental encoder, keyed shaft, no brake and right-angle SpeedTEC DIN connector.

The motor is designed for closed-loop industrial motion applications and is particularly relevant to machinery requiring repeated acceleration, deceleration, positioning and speed synchronization.

Its 3000 rpm operating class makes it suitable for applications where a faster motion cycle is required, while the low-inertia design supports responsive servo operation.

The keyed shaft makes it convenient for traditional industrial mechanical transmission systems, while the 180° rotatable right-angle connector provides useful installation flexibility.

The approximate listed product weight is 9.5 kg, and the principal dimensional references are 130 mm frame size × 101.6 mm magnet stack length.

Five closely related models include MPL-A4540F-HJ74AA, MPL-A4540F-HK72AA, MPL-A4540F-MJ72AA, MPL-A4540F-SJ72AA, and MPL-A4540F-SK72AA.

Among these, the HJ74AA configuration is relevant when a brake is required, the MJ72AA when multi-turn feedback is required, the SJ72AA when single-turn high-resolution feedback is preferred, and the SK72AA when a keyless shaft is required.

For replacement or retrofit work, the most important specifications to verify are 3000 rpm speed, 130 mm frame, 101.6 mm stack, 2000-line incremental feedback, keyed shaft, brake/no-brake configuration, connector arrangement, mounting dimensions, drive compatibility, load inertia and complete motor envelope.

The model has been identified as discontinued, with an engineering replacement listed for it, so this is particularly important when the purpose is procurement or retrofit rather than simply technical identification.