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Allen-Bradley MPL-B4540F-RJ72AA Low-Inertia Servo Motor

1. Product Overview

The Allen-Bradley MPL-B4540F-RJ72AA is a 460 V-class, low-inertia brushless AC rotary servo motor designed for industrial motion-control applications requiring accurate positioning, fast response, stable speed control, and repeatable machine movement.

The motor belongs to the MP-Series MPL Low-Inertia Servo Motor Series and uses a 130 mm frame with a 101.6 mm magnet stack.

The MPL-B4540F-RJ72AA is configured for 3000 RPM operation, resolver feedback, a keyed shaft extension, a right-angle SpeedTEC DIN connector, and no integral brake.

This configuration is particularly suitable for machines that require a traditional resolver-based feedback system and a keyed mechanical shaft connection.

The motor’s low-inertia construction allows it to respond quickly to changes in speed and position. This characteristic is especially useful in machines with frequent acceleration, deceleration, indexing, reversing, and positioning cycles.

The approximately 10.2 N·m continuous torque capability provides substantial continuous mechanical output for this frame class, while the approximately 27.1 N·m peak torque capability provides additional torque during short-duration acceleration and dynamic operating conditions.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Model	MPL-B4540F-RJ72AA
Product Type	AC rotary servo motor
Motor Construction	Brushless permanent-magnet servo motor
Voltage Class	460 V AC
System Voltage Class	480 V AC
Rated Speed	3000 RPM
Feedback	Resolver
Shaft	Keyed shaft extension
Brake	No integral brake
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Frame Size	130 mm
Magnet Stack	101.6 mm

The MPL series is designed for industrial servo systems where dynamic response and controlled motion are important.

Compared with general-purpose induction motors, a servo motor such as the MPL-B4540F-RJ72AA is intended to operate as part of a closed-loop motion system.

The servo drive continuously monitors feedback from the motor and adjusts current and torque to achieve the commanded speed and position.

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3. Model Number Interpretation

The model number contains several configuration identifiers that describe the motor.

Model Code	Description
MPL	MPL low-inertia servo motor family
B	460 V voltage class
45	Frame size 45 / approximately 130 mm
40	Magnet stack 40 / 101.6 mm
F	3000 RPM configuration
R	Resolver feedback
J	Keyed shaft extension
7	SpeedTEC DIN connector, right-angle and 180° rotatable
2	No integral brake
AA	Standard catalog configuration designation

The complete configuration can therefore be summarized as:

460 V class + 130 mm frame + 101.6 mm stack + 3000 RPM + resolver feedback + keyed shaft + SpeedTEC DIN connector + no brake.

This makes the model particularly suitable when the machine architecture is already designed around resolver feedback and a conventional keyed shaft connection.

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4. Detailed Technical Specifications

Parameter	MPL-B4540F-RJ72AA
Model	MPL-B4540F-RJ72AA
Brand	Allen-Bradley
Product Family	MP-Series
Series	MPL Low-Inertia
Motor Type	Brushless AC rotary servo motor
Voltage	460 V AC
System Class	480 V AC
Rated Speed	3000 RPM
Maximum Speed Class	3000 RPM
Continuous Stall Torque	10.2 N·m
Peak Torque	Approx. 27.1 N·m
Rated Power	Approx. 2.6 kW
Feedback Type	Resolver
Shaft Configuration	Keyed shaft extension
Brake	No integral brake
Connector	SpeedTEC DIN
Connector Configuration	Right-angle
Connector Rotation	180° rotatable
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	101.6 mm
Stack Designation	40
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Bolt Circle Class	130 mm
Rotor Construction	Low-inertia
Shaft Seal	Standard configuration without shaft seal
Approx. Motor Weight	Approx. 11 kg
Approx. Overall Length	Approx. 330 mm class
Frame / Stack Size	130 mm × 101.6 mm
Typical Application	Industrial servo motion control

The motor’s continuous torque rating of approximately 10.2 N·m makes it suitable for sustained medium-duty servo applications.

The peak torque capability of approximately 27.1 N·m gives the motor additional short-duration acceleration capacity.

The combination of 3000 RPM speed and low rotor inertia makes this motor appropriate for applications in which the machine must complete repeated motion cycles quickly.

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5. Dimensions and Weight

Mechanical dimensions are important when integrating the MPL-B4540F-RJ72AA into an existing machine.

The motor uses a 130 mm frame and a 101.6 mm magnet stack.

Mechanical Parameter	Specification
Model	MPL-B4540F-RJ72AA
Frame Size	130 mm
Frame Designation	45
Magnet Stack	101.6 mm
Stack Designation	40
Mounting	IEC metric
Mounting Style	Flange mount
Bolt Circle	130 mm class
Mounting Holes	Free mounting holes, Type FF
Shaft	Keyed shaft extension
Connector	SpeedTEC DIN
Connector Position	Right-angle
Connector Adjustment	180° rotatable
Brake Housing	Not applicable
Approx. Overall Length	Approx. 330 mm class
Approx. Motor Weight	Approx. 11 kg
Mechanical Envelope	130 mm frame × 101.6 mm stack class

The approximate 11 kg motor weight is useful for preliminary machine design and handling calculations.

The actual installed or shipping weight can vary depending on packaging, cable accessories, connectors, mounting hardware, and specific product revision.

For detailed mechanical design, the actual dimensional drawing associated with the motor revision should be used for shaft projection, flange dimensions, bolt-hole spacing, connector clearance, and total motor envelope.

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6. Electrical Characteristics

The MPL-B4540F-RJ72AA is designed for a 460 V AC class servo system.

Its 3000 RPM speed class makes it appropriate for applications requiring relatively rapid rotary motion.

Electrical / Performance Parameter	Value
Voltage Class	460 V AC
System Class	480 V AC
Speed	3000 RPM
Continuous Torque	10.2 N·m
Peak Torque	Approx. 27.1 N·m
Continuous Power Class	Approx. 2.6 kW
Feedback	Resolver
Brake	None
Brake Voltage	Not applicable
Motor Type	Brushless AC servo

The motor should be operated with a compatible servo drive configured for the correct motor characteristics.

Correct drive configuration is important because the servo controller uses motor feedback to regulate torque, speed, and position.

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7. Resolver Feedback

One of the main characteristics distinguishing the MPL-B4540F-RJ72AA from many other MPL configurations is its resolver feedback.

A resolver is a robust rotary position-feedback device commonly used in industrial environments.

Resolver feedback can be advantageous in applications where durability, electrical robustness, and reliable position feedback are important.

The resolver provides the servo system with information about motor shaft position.

The servo drive uses this information to control:

• Motor position.
• Motor speed.
• Direction.
• Acceleration.
• Deceleration.
• Torque response.
• Position synchronization.

Resolver-based servo systems have traditionally been used in demanding industrial applications because of their robust construction and tolerance of harsh electrical environments.

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8. Resolver Versus High-Resolution Encoder

The resolver configuration is important when comparing this model with other MPL motors.

Some related MPL motors use multi-turn or single-turn high-resolution encoder feedback instead.

Feature	Resolver Configuration	High-Resolution Encoder Configuration
Feedback Type	Resolver	Digital/absolute or incremental encoder
Mechanical Robustness	Very high	High
Feedback Resolution	Lower than high-resolution encoder systems	Generally higher
Industrial Reliability	Excellent	Excellent
Position Detail	Suitable for servo control	Excellent for precision applications
Typical Strength	Rugged feedback	High-resolution positioning
Model Example	MPL-B4540F-RJ72AA	MPL-B4540F-MJ72AA

The resolver version is a practical choice when the control system is designed for resolver feedback or when a robust resolver-based servo architecture is preferred.

If extremely high-resolution absolute position information is a major requirement, an appropriate encoder-feedback version may be a better choice.

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9. Keyed Shaft Extension

The MPL-B4540F-RJ72AA uses a keyed shaft extension.

A keyed shaft is a conventional and widely used mechanical interface for transmitting torque between the motor and driven machine.

The key and keyway prevent relative rotation between the shaft and compatible hub or coupling.

This configuration is particularly convenient for machines that already use standard keyed couplings.

Shaft Characteristic	MPL-B4540F-RJ72AA
Shaft Type	Keyed shaft
Mechanical Connection	Keyed coupling / hub
Primary Benefit	Positive torque transmission
Typical Use	Conventional industrial machinery
Maintenance	Straightforward mechanical interface
Alternative	Keyless shaft versions are available in the MPL family

For servo applications, the coupling should be correctly aligned.

Excessive misalignment can cause radial or axial loading, vibration, bearing stress, and reduced motor life.

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10. No Integral Brake

The MPL-B4540F-RJ72AA is a no-brake configuration.

This means the motor does not include an integral 24 V DC holding brake.

The no-brake configuration is suitable when the mechanical system does not require the motor to hold the load after servo torque is removed.

Typical examples include:

• Horizontal conveyors.
• Rotary indexing systems.
• Packaging feed mechanisms.
• Printing rollers.
• Horizontal positioning axes.
• General automation axes.

For vertical axes or gravity-loaded mechanisms, the absence of a motor brake must be carefully considered.

If the load can move when motor torque is removed, a brake-equipped motor or an independent mechanical holding mechanism may be required.

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11. SpeedTEC DIN Connector

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

The connector can be rotated approximately 180 degrees.

This feature gives machine builders more freedom when routing the motor cable.

It is particularly useful when the motor is installed in a compact machine where a straight connector would interfere with a guard, frame, cover, cable carrier, or neighboring component.

Advantages include:

• Flexible cable routing.
• Reduced cable interference.
• Easier installation.
• Improved machine layout.
• Easier maintenance access.
• Better accommodation of compact machine structures.

The cable should still be routed according to the specified minimum bend radius and installation requirements.

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12. Low-Inertia Construction

Low rotor inertia is one of the defining features of the MPL servo motor family.

A servo motor with low rotor inertia can change its speed more quickly because less rotational energy has to be changed during acceleration and deceleration.

This is particularly valuable in high-cycle automation.

For example, an indexing machine may repeatedly accelerate from zero speed, reach operating speed, decelerate to a stop, hold position, and then reverse.

The lower the rotor inertia, the easier it is for the servo system to perform these changes rapidly.

The MPL-B4540F-RJ72AA is therefore well suited to applications where cycle time is important.

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13. Main Product Advantages

13.1 Fast Servo Response

The low-inertia motor design supports rapid changes in speed and position.

This can help improve machine cycle time in repetitive automation applications.

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13.2 10.2 N·m Continuous Torque

The motor provides approximately 10.2 N·m continuous torque.

This gives the machine a useful level of sustained mechanical output without requiring a substantially larger motor frame.

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13.3 Approximately 27.1 N·m Peak Torque

The peak torque capability provides additional short-duration torque during acceleration and other transient operating conditions.

This is important for applications with demanding acceleration profiles.

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13.4 3000 RPM Operation

The 3000 RPM speed class is suitable for many industrial servo axes.

It provides enough speed for high-cycle machinery while maintaining a useful torque level.

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13.5 Robust Resolver Feedback

Resolver feedback provides a rugged and proven method of determining motor shaft position.

It is particularly suitable for industrial systems where robust feedback performance is valued.

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13.6 Keyed Shaft

The keyed shaft simplifies integration with conventional industrial couplings and machine components.

It is a practical choice when the existing machine design already uses keyed shafts.

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13.7 Compact 130 mm Frame

The 130 mm frame provides a useful combination of torque capability and mechanical size.

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13.8 Flexible Connector Orientation

The right-angle SpeedTEC DIN connector with 180-degree rotation provides additional installation flexibility.

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13.9 No-Brake Configuration

The absence of a brake reduces mechanical complexity when no holding brake is required.

This can be useful for horizontal motion axes.

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14. Typical Applications

Application	Typical Function
Packaging Machinery	Indexing, feeding and positioning
Conveyor Systems	Speed control and positioning
Pick-and-Place Equipment	High-speed positioning
Assembly Machines	Precision axis movement
Printing Equipment	Roller and feed synchronization
Converting Machinery	Web handling and positioning
Labeling Machinery	Feed and registration
Inspection Systems	Camera and mechanism positioning
Rotary Indexers	Repeated angular positioning
Machine Tools	Auxiliary servo movement
Material Handling	Transfer and positioning
Textile Machinery	Synchronized motion
Automated Production Lines	Multi-axis coordinated motion
General Factory Automation	Closed-loop motion control

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15. Packaging Machinery Applications

Packaging equipment is one of the most common areas where low-inertia servo motors are useful.

Packaging mechanisms frequently require rapid movement and accurate synchronization.

The MPL-B4540F-RJ72AA can be considered for:

• Product indexing.
• Film feeding.
• Rotary cutting.
• Conveyor synchronization.
• Label positioning.
• Feed mechanisms.
• Product transfer.

The 3000 RPM speed rating supports high-cycle operation, while the 10.2 N·m continuous torque provides useful sustained output.

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16. Pick-and-Place Applications

Pick-and-place machines require repeated rapid acceleration and deceleration.

The motor needs to respond quickly to the servo command while maintaining accurate position.

The low-inertia design of the MPL series is well suited to this operating pattern.

The keyed shaft also makes it convenient for use with conventional couplings and mechanical transmission components.

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17. Assembly Equipment

Automated assembly machines commonly use multiple servo axes.

One motor may control a transfer mechanism while another controls insertion, pressing, positioning, or inspection.

The MPL-B4540F-RJ72AA can provide the closed-loop motion control required for these operations.

Its resolver feedback is particularly suitable when the control architecture is already designed around resolver-based motor feedback.

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18. Printing and Converting Applications

Printing and converting machinery requires precise coordination between several rotating components.

The motor can be applied to:

• Feed rollers.
• Registration systems.
• Web-handling mechanisms.
• Cutting systems.
• Slitting mechanisms.
• Positioning rollers.
• Indexing systems.

The motor’s 3000 RPM operating speed and servo feedback make it suitable for synchronized motion.

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19. Material Handling Applications

The motor can be used for controlled movement in automated material-handling systems.

Typical applications include:

• Conveyor positioning.
• Transfer systems.
• Indexing mechanisms.
• Automated feeders.
• Rotary transfer tables.
• Packaging transfer systems.

For horizontal material-handling applications, the no-brake configuration can be particularly appropriate.

For vertical material handling, the machine designer should evaluate the need for a holding brake or independent mechanical load-holding system.

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20. Five Same-Series or Closely Related Models

The following models are useful alternatives or comparison models within the MPL family.

Model	Speed	Continuous Torque	Peak Torque	Power	Frame / Stack	Feedback	Shaft	Brake	Approx. Weight
MPL-B4540F-RJ74AA	3000 RPM	10.2 N·m	Approx. 27.1 N·m	Approx. 2.6 kW	130 × 101.6 mm	Resolver	Keyed	24 V DC	Approx. 13 kg
MPL-B4540F-RK72AA	3000 RPM	10.2 N·m	Approx. 27.1 N·m	Approx. 2.6 kW	130 × 101.6 mm	Resolver	Keyless	No	Approx. 10–11 kg
MPL-B4540F-RK74AA	3000 RPM	10.2 N·m	Approx. 27.1 N·m	Approx. 2.6 kW	130 × 101.6 mm	Resolver	Keyless	24 V DC	Approx. 13 kg
MPL-B4530F-RJ72AA	3000 RPM	Approx. 8.25 N·m	Approx. 20.3 N·m	Approx. 2.1 kW	130 × 76.2 mm	Resolver	Keyed	No	Approx. 8 kg
MPL-B4560F-RJ72AA	3000 RPM	Approx. 14.1 N·m	Approx. 34.4 N·m	Approx. 3.2 kW	130 × 152.4 mm	Resolver	Keyed	No	Approx. 12 kg

The MPL-B4540F-RJ74AA is the closest brake-equipped alternative because it retains the resolver and keyed-shaft configuration.

The MPL-B4540F-RK72AA changes the shaft from keyed to keyless while retaining resolver feedback and the no-brake configuration.

The MPL-B4540F-RK74AA combines resolver feedback, keyless shaft, and a 24 V DC brake.

The shorter-stack MPL-B4530F-RJ72AA provides lower torque and a more compact active stack.

The longer-stack MPL-B4560F-RJ72AA provides higher torque for heavier-duty applications.

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21. Closest Alternative: MPL-B4540F-RJ74AA

The MPL-B4540F-RJ74AA is probably the closest functional alternative to the subject model.

Both models use:

• 460 V class.
• 130 mm frame.
• 101.6 mm stack.
• 3000 RPM.
• Resolver feedback.
• Keyed shaft.
• SpeedTEC DIN connector.

The primary difference is the brake.

Feature	MPL-B4540F-RJ72AA	MPL-B4540F-RJ74AA
Frame	130 mm	130 mm
Stack	101.6 mm	101.6 mm
Speed	3000 RPM	3000 RPM
Continuous Torque	10.2 N·m	10.2 N·m
Peak Torque	Approx. 27.1 N·m	Approx. 27.1 N·m
Power	Approx. 2.6 kW	Approx. 2.6 kW
Feedback	Resolver	Resolver
Shaft	Keyed	Keyed
Brake	No	24 V DC
Connector	SpeedTEC DIN	SpeedTEC DIN
Approx. Weight	Approx. 11 kg	Approx. 13 kg

For a horizontal axis where no holding brake is required, the RJ72AA is generally the simpler configuration.

For a vertical or gravity-loaded axis where holding capability is required, the RJ74AA is the more appropriate configuration to evaluate.

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22. Keyed Versus Keyless Resolver Models

The RJ and RK configurations provide an easy example of the difference between keyed and keyless shaft designs.

Feature	MPL-B4540F-RJ72AA	MPL-B4540F-RK72AA
Feedback	Resolver	Resolver
Shaft	Keyed	Keyless
Brake	No	No
Speed	3000 RPM	3000 RPM
Frame	130 mm	130 mm
Stack	101.6 mm	101.6 mm
Continuous Torque	10.2 N·m	10.2 N·m
Peak Torque	Approx. 27.1 N·m	Approx. 27.1 N·m
Connector	SpeedTEC DIN	SpeedTEC DIN

The selection is mainly mechanical.

If the machine uses a traditional keyed coupling, the RJ72AA is the natural choice.

If the machine uses a clamping or friction-based coupling, the RK72AA can be considered.

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23. Five Popular Allen-Bradley Models for Comparison

The following models provide useful comparison points within the broader servo-motor range.

Model	Series	Speed	Continuous Torque	Peak Torque	Power	Frame / Stack	Feedback	Shaft / Brake	Approx. Weight
MPL-B4540F-MJ74AA	MPL	3000 RPM	10.2 N·m	27.1 N·m	2.6 kW	130 × 101.6 mm	Multi-turn absolute	Keyed / 24 V brake	Approx. 10.6 kg
MPL-B4540F-MK74AA	MPL	3000 RPM	10.2 N·m	27.1 N·m	2.6 kW	130 × 101.6 mm	Multi-turn absolute	Keyless / 24 V brake	Approx. 9–12 kg
MPL-B4540F-HJ74AA	MPL	3000 RPM	10.2 N·m	27.1 N·m	2.6 kW	130 × 101.6 mm	High-resolution incremental	Keyed / 24 V brake	Approx. 11 kg
MPL-B4560F-MJ74AA	MPL	3000 RPM	14.1 N·m	34.4 N·m	3.2 kW	130 × 152.4 mm	Multi-turn absolute	Keyed / 24 V brake	Approx. 11.8 kg
MPL-B540K-MJ74AA	MPL	4000 RPM	19.4 N·m	48.6 N·m	5.4 kW	Approx. 165 × 101.6 mm	Multi-turn absolute	Keyed / 24 V brake	Approx. 15 kg

These models cover several different motion-control requirements.

The B4540F models are suitable for approximately 10 N·m continuous torque applications.

The B4560F provides a higher torque level through a longer magnet stack.

The B540K moves into a higher power and torque class and is more suitable for heavier machinery.

The HJ configuration provides an alternative feedback arrangement for systems designed around incremental/high-resolution feedback.

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24. Product Selection Guide

The following table provides a practical starting point for selecting between related models.

Requirement	Suitable Direction
Approximately 8 N·m continuous torque	B4530F
Approximately 10 N·m continuous torque	B4540F
Approximately 14 N·m continuous torque	B4560F
Approximately 19 N·m continuous torque	B540K
Resolver feedback	R configuration
Multi-turn absolute feedback	M configuration
High-resolution incremental feedback	H configuration
Keyed shaft	J configuration
Keyless shaft	K configuration
No integral brake	72 configuration
Integral 24 V DC brake	74 configuration
3000 RPM	F configuration
4000 RPM	K-speed configuration in applicable models

For an application requiring resolver feedback, a keyed shaft, 3000 RPM, no brake, and approximately 10.2 N·m continuous torque, the MPL-B4540F-RJ72AA is a particularly direct match.

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25. Machine Design Considerations

When integrating this motor into a machine, several factors should be evaluated together.

The motor should be mounted on a rigid surface with proper flange alignment.

The coupling should be selected for the motor’s continuous and peak torque.

The driven load should be analyzed for inertia and reflected inertia.

The servo drive should be configured for resolver feedback.

The motor cable should be routed without excessive bending or mechanical stress.

The machine should provide sufficient clearance around the motor for service and connector access.

The no-brake configuration should be considered carefully if the axis is vertical or gravity loaded.

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26. Servo Drive Compatibility

The MPL-B4540F-RJ72AA is designed for use in a compatible servo motion-control system.

When selecting the drive, the following factors should be checked:

• 460 V motor voltage class.
• Continuous motor current.
• Peak motor current.
• Resolver feedback interface.
• Motor feedback configuration.
• Maximum operating speed.
• Required acceleration.
• Required deceleration.
• Load inertia.
• Motor-to-load inertia ratio.
• Drive tuning capability.
• Safety requirements.

The drive should be programmed using the correct motor parameters.

Using an incorrect motor profile can result in inaccurate feedback scaling, poor servo response, excessive following error, overheating, or drive faults.

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27. Load Inertia Considerations

Servo motor selection should not be based only on the motor’s rated torque.

The inertia of the driven load is equally important.

A low-inertia motor is particularly effective when the load inertia is reasonably matched to the motor.

If the external load is very large compared with the motor rotor, the servo system may require:

• Gear reduction.
• Longer acceleration time.
• More aggressive servo tuning.
• A higher torque motor.
• A different mechanical transmission.

The designer should evaluate the complete motion profile rather than relying only on the motor’s nameplate torque.

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28. Brake-Free Configuration and Safety

Because the RJ72AA has no integral brake, it should not be selected for a vertical load simply because its torque rating is adequate.

When motor torque is removed, a gravity-loaded axis can potentially move.

For vertical applications, the designer should evaluate whether an external brake, mechanical locking system, counterbalance, or another load-holding mechanism is required.

The final safety system should be designed according to the complete machine requirements.

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29. Maintenance and Troubleshooting

The MPL-B4540F-RJ72AA is intended for industrial service, but proper installation and operation are essential for reliable performance.

If the motor produces excessive vibration, inspect:

• Coupling alignment.
• Motor mounting.
• Shaft alignment.
• Load balance.
• Bearing condition.
• Servo tuning.

If the servo system reports position errors, inspect:

• Resolver wiring.
• Resolver feedback configuration.
• Mechanical backlash.
• Coupling condition.
• Load inertia.
• Servo tuning.

If the motor temperature is unusually high, inspect:

• Continuous load torque.
• Duty cycle.
• Ambient temperature.
• Mechanical friction.
• Drive current.
• Ventilation.

If the motor fails to achieve the expected speed or acceleration, check:

• Drive sizing.
• Current limits.
• Load torque.
• Acceleration settings.
• Motor parameters.
• Mechanical transmission losses.

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30. Advantages in Industrial Automation

The MPL-B4540F-RJ72AA offers a combination of characteristics that is useful for standardized automation platforms.

Its 130 mm frame provides a compact mechanical solution for a 2.6 kW-class servo motor.

The 3000 RPM speed supports high-cycle machine operation.

The low-inertia rotor provides fast dynamic response.

Resolver feedback offers a robust position-feedback method.

The keyed shaft makes mechanical integration straightforward for conventional industrial couplings.

The right-angle, rotatable SpeedTEC DIN connector simplifies cable routing.

The no-brake configuration avoids unnecessary brake hardware where holding capability is not required.

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31. Application Suitability

Application	Suitability
Packaging Machinery	Excellent
Horizontal Conveyors	Excellent
Rotary Indexing	Excellent
Pick-and-Place	Excellent
Automated Assembly	Excellent
Material Handling	Very Good
Printing	Very Good
Converting	Very Good
Labeling	Excellent
Inspection Equipment	Excellent
Machine Tools	Very Good
Textile Machinery	Very Good
Vertical Axis	Requires external holding solution
General Factory Automation	Excellent

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32. Quick Reference Table

Parameter	Specification
Model	MPL-B4540F-RJ72AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Product Type	Brushless AC rotary servo motor
Voltage	460 V AC class
System Voltage	480 V AC class
Speed	3000 RPM
Continuous Torque	10.2 N·m
Peak Torque	Approx. 27.1 N·m
Power	Approx. 2.6 kW
Feedback	Resolver
Shaft	Keyed shaft extension
Brake	No integral brake
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	180° rotatable
Frame Size	130 mm
Magnet Stack	101.6 mm
Mounting	IEC metric
Mounting Holes	Free mounting holes, Type FF
Bolt Circle	130 mm class
Approx. Overall Length	Approx. 330 mm class
Approx. Weight	Approx. 11 kg
Main Application	Industrial servo motion control

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33. Final Product Assessment

The Allen-Bradley MPL-B4540F-RJ72AA is a robust 3000 RPM low-inertia servo motor designed for industrial motion-control applications where reliable closed-loop control, accurate positioning, and rapid dynamic response are required.

Its 10.2 N·m continuous torque and approximately 27.1 N·m peak torque provide a useful combination of sustained and short-duration torque.

The 130 mm frame and 101.6 mm magnet stack provide a balanced mechanical configuration for medium-duty servo applications.

The use of a resolver makes this model particularly appropriate for control systems designed around resolver-based feedback.

The keyed shaft provides a conventional mechanical connection that is compatible with a wide range of industrial couplings and transmission components.

The SpeedTEC DIN right-angle connector with 180-degree rotational adjustment provides useful flexibility during machine installation and cable routing.

The no-brake configuration is well suited to horizontal and other applications where an integral holding brake is not required.

For applications that require the same general motor configuration but need a holding brake, the MPL-B4540F-RJ74AA is the most direct alternative to consider.

For applications that require resolver feedback but use a keyless mechanical coupling, the MPL-B4540F-RK72AA is a logical alternative.

For applications requiring multi-turn absolute feedback rather than resolver feedback, models such as the MPL-B4540F-MJ72AA or MPL-B4540F-MK72AA can be considered according to the required shaft configuration.

For higher torque requirements, the longer-stack MPL-B4560F family provides a higher-output alternative.

Overall, the MPL-B4540F-RJ72AA can be described as a 460 V-class, 3000 RPM, 2.6 kW-class, 130 mm-frame, low-inertia servo motor with approximately 10.2 N·m continuous torque, approximately 27.1 N·m peak torque, resolver feedback, keyed shaft, SpeedTEC DIN connectivity, and no integral brake.

It is especially suitable for packaging equipment, indexing systems, automated assembly machines, pick-and-place mechanisms, horizontal material-handling systems, printing and converting machinery, labeling equipment, inspection machines, and general industrial automation.