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MPL-B4540F-HJ74AA Low-Inertia Servo Motor

1. Product Overview

The MPL-B4540F-HJ74AA is a low-inertia brushless rotary servo motor designed for industrial automation and precision motion-control applications.

It belongs to the MP-Series MPL low-inertia servo motor family and uses a 130 mm metric frame with a 101.6 mm magnet stack.

The motor is designed for a 400/460 V class servo system and operates at a rated speed of 3000 rpm. It provides approximately 10.2 N·m of continuous torque and approximately 27.1 N·m of peak torque, giving it a good balance between continuous load capability and short-duration acceleration performance.

One of the defining features of this model is its 24 V DC holding brake. Compared with the corresponding no-brake configuration, the brake-equipped version is better suited to machines where the motor must help hold a load in position after servo power is removed.

The motor uses an incremental encoder feedback configuration and a keyed shaft. It also uses a right-angle SpeedTEC DIN connector with a rotatable connection arrangement, which makes it easier to route the motor cable in compact machinery.

The MPL-B4540F-HJ74AA is therefore a practical choice for servo axes that need relatively high torque, rapid response, accurate feedback, and an integrated holding brake.

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2. Brand and Series

Item	Information
Model	MPL-B4540F-HJ74AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Product Type	Brushless Rotary Servo Motor
Motor Category	Industrial Servo Motor
Voltage Class	400/460 V class
Frame Class	45
Metric Frame Size	130 mm
Magnet Stack	40
Magnet Stack Length	101.6 mm
Speed Class	3000 rpm
Feedback Type	Incremental Encoder
Shaft Type	Keyed Shaft
Brake	24 V DC Brake
Connector	SpeedTEC DIN
Connector Style	Right Angle
Mounting	IEC Metric Flange

The MPL series is designed for applications where rapid servo response, accurate motion control, compact motor construction, and repeatable machine movement are important.

The low-inertia construction makes the series particularly suitable for applications involving frequent acceleration, deceleration, indexing, positioning, and changes in direction.

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3. Detailed Technical Specifications

Parameter	MPL-B4540F-HJ74AA
Model	MPL-B4540F-HJ74AA
Motor Type	Brushless rotary servo motor
Series	MPL Low-Inertia Servo Motor
Product Family	MP-Series
Voltage Class	400/460 V
Armature Voltage	460 V class
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Stall Torque	10.2 N·m
Peak Stall Torque	27.1 N·m
Rated Motor Output	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution class
Shaft	Keyed shaft
Shaft Seal	No shaft seal
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Position	Right angle
Connector Rotation	180° rotatable
Frame Size	130 mm
Frame Designation	Frame 45
Magnet Stack Length	101.6 mm
Mounting	Metric flange
Mounting Pattern	130 mm frame class
Approx. Motor Weight	8.6 kg
Approx. Weight	8.6 kg
Product Construction	Low-inertia servo motor
Primary Application	Industrial motion control

The 8.6 kg figure is the approximate motor weight for the B4540F motor family configuration. Actual shipped weight can be higher because of packaging, cables, connectors, and accessories.

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4. Dimensions and Mechanical Information

The MPL-B4540F-HJ74AA uses a 130 mm metric frame and a 101.6 mm magnet stack.

The frame size is important when determining whether the motor can physically fit into an existing machine design.

The 101.6 mm stack length identifies the longer B4540F motor configuration within the 130 mm frame class.

Mechanical Parameter	Specification
Model	MPL-B4540F-HJ74AA
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	101.6 mm
Flange	Metric flange
Mounting Frame	130 mm class
Shaft	Keyed
Shaft Seal	None
Connector	Right-angle SpeedTEC DIN
Connector Rotation	180°
Brake	Integrated 24 V DC brake
Approx. Motor Weight	8.6 kg
Approx. Weight Including Packaging	Higher than net motor weight
Overall Installation Envelope	Depends on shaft projection, connector position and mounting arrangement

For machine design, the 130 mm frame and 101.6 mm stack should be treated as the basic motor envelope rather than the complete installation envelope.

Additional clearance should be provided for the motor shaft, coupling, connector, cable bend radius, and brake-related wiring.

When the motor is installed inside a machine enclosure, it is also important to leave sufficient space around the connector for installation and maintenance.

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5. Motor Performance

The MPL-B4540F-HJ74AA is rated for approximately 10.2 N·m of continuous torque and approximately 27.1 N·m of peak torque.

This gives the motor a substantial torque margin for short acceleration and deceleration events.

The motor’s rated output is approximately 2.6 kW.

Its 3000 rpm operating speed makes it suitable for medium-speed industrial servo applications.

Performance Parameter	Value
Model	MPL-B4540F-HJ74AA
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Torque	10.2 N·m
Peak Torque	27.1 N·m
Rated Output	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Frame	130 mm
Stack	101.6 mm
Weight	Approx. 8.6 kg

The relatively high peak torque compared with continuous torque is particularly useful for machines that operate with short but frequent acceleration cycles.

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6. Low-Inertia Design

The low-inertia construction is one of the most important characteristics of the MPL-B4540F-HJ74AA.

A servo motor with lower rotor inertia can change its speed more rapidly than a motor with a substantially higher rotor inertia, assuming the rest of the servo system is properly matched.

This characteristic is valuable in machines that repeatedly start, stop, accelerate, decelerate, or reverse direction.

Typical examples include indexing equipment, packaging machines, automated assembly equipment, printing machinery, and pick-and-place mechanisms.

The approximately 0.00052 kg·m² rotor inertia is appropriate for a servo motor in this performance class and contributes to its dynamic response.

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7. 3000 rpm Speed Rating

The MPL-B4540F-HJ74AA is a 3000 rpm motor.

This speed range provides a good balance between rotational speed and torque.

The motor can be used directly on suitable rotary mechanisms or combined with a gearbox, belt drive, ball screw, planetary transmission, or other mechanical transmission system.

A gearbox can be used when the machine requires greater output torque at a lower mechanical speed.

Conversely, a direct-drive arrangement can be considered where the load speed and motor torque requirements are compatible.

The final transmission ratio should be selected according to the actual load inertia, required speed, acceleration time, and continuous torque requirement.

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8. 24 V DC Holding Brake

The 24 V DC brake is one of the main differences between the HJ74AA and comparable HJ72AA configurations.

The integral brake provides a mechanical holding function when the motor is not being actively driven.

This feature is particularly useful for applications where the load must remain stationary after the servo system removes motor torque.

Typical examples include vertical positioning axes, lifting mechanisms, elevation systems, and machinery where unwanted movement after power loss must be controlled.

The brake should not automatically be considered a complete machine safety system. The machine designer must determine the appropriate safety architecture based on the actual load and application.

The brake is primarily a holding device rather than a replacement for normal dynamic braking during routine machine operation.

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9. Incremental Encoder Feedback

The MPL-B4540F-HJ74AA uses an incremental encoder feedback system.

The encoder provides the servo controller with information about motor rotation and position.

The feedback is essential to closed-loop servo operation.

Instead of simply applying a fixed voltage to the motor, the servo drive continuously monitors motor feedback and adjusts the motor command according to the actual motion.

This makes the motor suitable for applications requiring:

• Accurate positioning
• Controlled acceleration
• Controlled deceleration
• Stable speed regulation
• Repeatable indexing
• Coordinated motion
• Electronic synchronization

The incremental feedback arrangement is a practical choice for many established industrial servo systems.

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10. Keyed Shaft

The motor uses a keyed shaft.

A keyed shaft provides positive mechanical torque transmission between the motor and the driven component when used with a suitable coupling or transmission component.

This configuration is familiar in industrial machinery and can simplify integration where the existing mechanical design already uses keyed shafts.

Typical applications include:

• Gearboxes
• Belt drives
• Pulley systems
• Rotary tables
• Mechanical couplings
• Rollers
• Feed mechanisms
• Indexing mechanisms

Correct alignment remains important even when a keyed shaft is used.

Misalignment can create excessive radial or axial loads and may reduce bearing life.

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11. SpeedTEC DIN Right-Angle Connector

The MPL-B4540F-HJ74AA uses a SpeedTEC DIN connector in a right-angle configuration.

This arrangement is useful for machine builders because the connector does not extend straight out from the motor in the same way as a straight connector.

The right-angle configuration can make cable routing easier in compact machine assemblies.

The connector can also be rotated, providing additional flexibility when determining the cable exit direction.

This is particularly helpful in machines with:

• Narrow motor compartments
• Cable tracks
• Multiple adjacent servo axes
• Limited cabinet space
• Moving machine assemblies
• Restricted cable routing paths

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12. Product Introduction

The MPL-B4540F-HJ74AA is designed for applications that require controlled rotary motion rather than simple constant-speed motor operation.

A complete servo axis normally includes a controller, servo drive, motor, feedback system, and mechanical load.

The controller generates a motion command.

The servo drive converts that command into controlled motor current.

The motor produces the mechanical torque.

The encoder sends feedback to the control system.

The system then continuously compares commanded motion with actual motor behavior and makes corrections.

This closed-loop process allows the MPL-B4540F-HJ74AA to be used for precise positioning, speed control, acceleration control, and synchronized motion.

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13. Main Product Advantages

13.1 High Continuous Torque

The motor provides approximately 10.2 N·m of continuous torque.

This gives it a useful continuous load capability for medium-duty servo applications.

It can be used where the machine requires more torque than smaller MPL motor configurations can provide.

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13.2 High Peak Torque

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

This is useful when the machine requires rapid acceleration or must overcome a temporary increase in mechanical resistance.

The peak torque capability should always be evaluated against the actual acceleration profile and duty cycle.

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13.3 Low Rotor Inertia

Low rotor inertia allows the motor to respond quickly to changes in commanded motion.

This is especially useful for repetitive positioning applications.

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13.4 Integrated Brake

The 24 V DC brake gives the HJ74AA configuration an important advantage in applications requiring motor-side holding.

This can simplify the machine design because the holding function is integrated into the motor.

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13.5 130 mm Industrial Frame

The 130 mm metric frame provides a standardized mounting format for industrial machine construction.

It allows the motor to be integrated into a wide variety of servo-axis designs.

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13.6 101.6 mm Magnet Stack

The longer 101.6 mm stack provides higher torque capability than shorter-stack motors in the same general frame family.

This makes the B4540F configuration attractive when additional torque is required without moving to a substantially larger frame class.

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13.7 Keyed Shaft

The keyed shaft provides a conventional mechanical interface that is easy to understand and widely used in industrial equipment.

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13.8 Right-Angle Connector

The right-angle connector is useful where cable space is restricted.

The rotatable connector also gives machine builders more flexibility when routing servo cables.

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14. Typical Applications

Packaging Machinery

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

The MPL-B4540F-HJ74AA can be used for feed mechanisms, indexing systems, rotary stations, cutting mechanisms, product positioning, and synchronized packaging movements.

The motor’s 3000 rpm speed and 27.1 N·m peak torque provide useful dynamic capability for repeated machine cycles.

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Vertical Positioning Systems

The integrated 24 V DC brake makes this motor particularly interesting for certain vertical servo axes.

A vertical axis can move because of gravity when motor torque is removed.

The motor brake can provide a holding function when properly integrated into the machine control and safety design.

Examples include:

• Vertical lifting axes
• Elevators within automated machinery
• Z-axis mechanisms
• Tool positioning systems
• Material lifting systems
• Vertical assembly mechanisms

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Automated Assembly

Assembly machines often require accurate and repeatable positioning.

The motor can be used to control rotary axes, transfer mechanisms, indexing stations, insertion mechanisms, and positioning systems.

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Rotary Indexing Tables

The combination of continuous torque, peak torque, feedback, and low inertia makes the motor suitable for rotary indexing applications.

The servo system can accelerate the table, move it to the required position, decelerate, and hold the position.

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Material Handling

Servo-driven material handling equipment can benefit from controlled acceleration and deceleration.

Applications include:

• Transfer systems
• Indexing conveyors
• Automated sorting
• Pick-and-place mechanisms
• Product positioning
• Feed systems

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Printing and Converting Machinery

Printing and converting machines frequently require accurate synchronization between rotating components.

Servo motors can control rollers, feed mechanisms, positioning systems, cutting systems, and other synchronized axes.

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Labeling Equipment

Labeling machinery requires accurate timing between the product and the labeling mechanism.

The servo motor can provide controlled motion and synchronization with other machine axes.

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Machine Tools

The motor can be used for suitable auxiliary or positioning axes in machine tools.

Its feedback system provides the control required for accurate rotary motion.

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15. Application Suitability Table

Application	Suitability	Reason
Packaging machines	Excellent	Fast response and high peak torque
Rotary indexing	Excellent	Good torque and positioning capability
Vertical axes	Very Good	Integrated 24 V DC holding brake
Automated assembly	Excellent	Closed-loop positioning
Material handling	Very Good	Controlled speed and acceleration
Labeling equipment	Very Good	Motion synchronization
Printing equipment	Very Good	Servo feedback and speed control
Machine tools	Good	Accurate servo positioning
Conveyor positioning	Very Good	Controlled movement
Pick-and-place systems	Excellent	Low inertia and dynamic response
Lifting equipment	Good	Brake-equipped configuration
Constant-speed applications	Usually unnecessary	Servo capability may be excessive

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16. Five Same-Series or Closely Related Models

The following models are useful when comparing the MPL-B4540F-HJ74AA with other configurations in the same or closely related MPL family.

Model	Speed	Continuous Torque	Peak Torque	Feedback	Brake	Shaft	Stack	Frame	Approx. Weight
MPL-B4540F-HJ74AA	3000 rpm	10.2 N·m	27.1 N·m	Incremental	24 V DC	Keyed	101.6 mm	130 mm	8.6 kg
MPL-B4540F-HJ72AA	3000 rpm	10.2 N·m	27.1 N·m	Incremental	No	Keyed	101.6 mm	130 mm	8.6 kg
MPL-B4540F-HK74AA	3000 rpm	10.2 N·m	27.1 N·m	High-resolution	24 V DC	Keyed	101.6 mm	130 mm	8.6 kg class
MPL-B4540F-MK74AA	3000 rpm	10.2 N·m	27.1 N·m	Multi-turn absolute	24 V DC	Keyless	101.6 mm	130 mm	8.6 kg class
MPL-B4560F-MJ74AA	3000 rpm	14.1 N·m	34.4 N·m	Multi-turn absolute	24 V DC	Keyed	152.4 mm	130 mm	14.1 kg

These models are especially useful because they allow the machine designer to change one important characteristic without completely changing the motor family.

For example, the HJ72AA and HJ74AA configurations are mechanically very similar, but the HJ74AA adds the 24 V DC brake.

The HK configurations are useful where feedback characteristics are more important.

The MK configuration is useful when absolute multi-turn feedback is required.

The B4560F family moves to a longer stack and provides additional torque capability.

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17. Detailed Comparison of Related Models

MPL-B4540F-HJ72AA

The HJ72AA is the no-brake counterpart to the HJ74AA.

Its basic motor performance is in the same class, including the 3000 rpm speed and approximately 10.2 N·m continuous torque.

The main reason to select the HJ72AA instead of the HJ74AA would be that the application does not need a motor-mounted holding brake.

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MPL-B4540F-HK74AA

The HK74AA combines the B4540F mechanical platform with a higher-resolution feedback arrangement and a 24 V DC brake.

It can be considered when the application requires both the holding capability of the HJ74AA and more advanced feedback characteristics.

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MPL-B4540F-MK74AA

The MK74AA uses multi-turn absolute feedback and a 24 V DC brake.

This type of configuration can be useful when the control architecture benefits from absolute position information over multiple revolutions.

It is especially attractive in applications where machine position recovery and multi-turn positioning are important.

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MPL-B4560F-MJ74AA

The B4560F has a longer 152.4 mm stack.

It provides approximately 14.1 N·m continuous torque and approximately 34.4 N·m peak torque.

It is therefore a logical step upward when the B4540F does not provide sufficient torque margin.

The larger stack also means that the machine designer must allow for the increased physical envelope and approximately 14.1 kg motor weight.

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18. Five Same-Brand Popular or Widely Used Models

The following models provide a broader selection of related servo motors within the same brand family.

They are not all direct replacements for the MPL-B4540F-HJ74AA. They are included because they are useful comparison points when selecting servo motors for different speed, torque, feedback, and mechanical requirements.

Model	Product Type	Rated Speed	Continuous Torque	Peak Torque	Feedback	Brake	Dimensions	Approx. Weight
MPL-B4530K-HK74AA	Servo Motor	4000 rpm	8.25 N·m	20.3 N·m	High-resolution	24 V DC	130 mm frame × 76.2 mm stack	Approx. 7–8 kg class
MPL-B4540F-HK74AA	Servo Motor	3000 rpm	10.2 N·m	27.1 N·m	High-resolution	24 V DC	130 mm frame × 101.6 mm stack	Approx. 8.6 kg
MPL-B4540F-MK74AA	Servo Motor	3000 rpm	10.2 N·m	27.1 N·m	Multi-turn absolute	24 V DC	130 mm frame × 101.6 mm stack	Approx. 8.6 kg class
MPL-B4560F-MJ74AA	Servo Motor	3000 rpm	14.1 N·m	34.4 N·m	Multi-turn absolute	24 V DC	130 mm frame × 152.4 mm stack	Approx. 14.1 kg
MPL-B540K-MJ74AA	Servo Motor	4000 rpm	19.4 N·m	48.6 N·m	Multi-turn absolute	24 V DC	165 mm frame × 101.6 mm stack	Approx. 19.4 kg

These models cover a useful range of servo requirements.

The B4530K is more speed-oriented.

The B4540F provides a stronger torque level at 3000 rpm.

The B4560F provides additional torque through a longer stack.

The B540K moves into a substantially larger frame and higher torque class.

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19. Model Selection by Requirement

Requirement	Recommended Model
Standard 3000 rpm servo with brake	MPL-B4540F-HJ74AA
Same motor without brake	MPL-B4540F-HJ72AA
High-resolution feedback plus brake	MPL-B4540F-HK74AA
Multi-turn absolute feedback plus brake	MPL-B4540F-MK74AA
More torque at 3000 rpm	MPL-B4560F-MJ74AA
Higher speed with smaller stack	MPL-B4530K-HK74AA
Much higher torque	MPL-B540K-MJ74AA
Vertical servo axis	Brake-equipped configuration
High-cycle indexing	Low-inertia MPL configuration
Absolute position requirement	Multi-turn feedback configuration

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20. Advantages in Packaging Applications

Packaging machinery often has demanding motion profiles.

The motor may have to accelerate rapidly, move a product or mechanism into position, stop, wait briefly, and then repeat the sequence.

The low-inertia rotor helps the motor respond to these repeated commands.

The 27.1 N·m peak torque provides additional capacity during acceleration.

The 24 V DC brake is also useful for certain machine mechanisms that need to remain mechanically held when the servo is disabled.

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21. Advantages in Vertical Applications

The HJ74AA configuration is particularly useful when the servo axis can be affected by gravity.

For example, a vertical machine axis may carry a tooling assembly or material-handling device.

If servo torque is removed, gravity can cause the axis to move.

A motor-mounted holding brake can provide an additional mechanical holding function.

This is one of the most significant practical reasons to choose the HJ74AA rather than the otherwise similar HJ72AA.

However, the brake should be integrated into the complete machine safety system rather than treated as the only safety measure.

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22. Advantages in High-Cycle Machinery

Low-inertia servo motors are particularly useful when a machine performs thousands of motion cycles.

A typical cycle may involve:

1. Rapid acceleration.
2. Controlled movement.
3. Rapid deceleration.
4. Position confirmation.
5. Holding.
6. Reverse movement.
7. Repetition.

The MPL-B4540F-HJ74AA is well suited to this type of operating profile when the load, inertia, and thermal duty cycle are correctly matched.

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23. Installation Considerations

Correct installation is important for achieving reliable servo performance.

The motor should be mounted to a rigid mechanical structure.

The mounting flange should be correctly aligned.

The driven shaft should be properly aligned with the motor shaft.

The coupling should be selected according to the required torque, speed, shaft dimensions, and allowable misalignment.

Excessive shaft loading should be avoided.

The servo cable should also be routed carefully to avoid unnecessary bending, crushing, abrasion, or repeated mechanical stress.

Because this model has a right-angle connector, the connector direction should be considered before final installation.

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24. Brake Installation Considerations

The 24 V DC brake requires appropriate electrical control.

The brake should be controlled according to the servo system’s operating sequence.

In many applications, the brake is released before the motor is commanded to produce normal movement.

When stopping a vertical axis, the motor can normally be brought under controlled servo operation before the brake is applied.

The exact brake-control sequence depends on the machine architecture and servo system.

Improper brake timing can create mechanical shock, unnecessary wear, or unwanted axis movement.

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25. Feedback and Control Considerations

The incremental encoder must be compatible with the selected servo drive and control architecture.

Feedback wiring should be properly installed and protected.

Noise, poor grounding, damaged cables, loose connectors, and incorrect feedback wiring can lead to servo faults or unstable motor operation.

For machines operating at high speed or with rapid positioning cycles, cable routing and shielding become especially important.

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26. Maintenance Recommendations

Regular inspection can help maintain servo motor reliability.

Important inspection points include:

• Motor mounting bolts
• Shaft coupling
• Motor bearings
• Encoder connection
• Power cable
• Feedback cable
• Brake wiring
• Connector condition
• Abnormal vibration
• Unusual motor noise
• Motor temperature
• Brake operation
• Mechanical alignment

If the motor begins to exhibit unusual vibration or temperature rise, the mechanical load and coupling should be checked before assuming that the motor itself has failed.

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27. Typical Problems Caused by Incorrect Selection

Servo motor problems are not always caused by defective motors.

A motor can appear to be underperforming when the actual problem is caused by an incorrectly sized drive, excessive load inertia, incorrect acceleration settings, poor mechanical alignment, excessive shaft loading, or inadequate cooling.

Common selection mistakes include:

• Selecting based only on motor power
• Ignoring peak torque
• Ignoring load inertia
• Ignoring acceleration time
• Ignoring braking requirements
• Ignoring vertical-load conditions
• Choosing an incompatible feedback configuration
• Leaving insufficient connector clearance
• Ignoring cable bend radius
• Using an unsuitable coupling

A complete servo-axis calculation should therefore be performed before final selection.

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28. Product Strengths at a Glance

Feature	Benefit
Low-inertia construction	Fast dynamic response
3000 rpm rating	Good balance of speed and torque
10.2 N·m continuous torque	Strong continuous load capability
27.1 N·m peak torque	Good acceleration capability
2.6 kW class output	Suitable for medium-duty servo axes
24 V DC brake	Mechanical holding capability
Incremental encoder	Closed-loop motion control
Keyed shaft	Conventional mechanical connection
130 mm frame	Standard industrial mounting format
101.6 mm stack	Higher torque capability
Right-angle connector	Convenient cable routing
Rotatable connector	Flexible installation
MPL low-inertia platform	Suitable for high-cycle automation

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29. Complete Quick Reference

Category	Specification
Model	MPL-B4540F-HJ74AA
Brand	Allen-Bradley
Series	MPL Low-Inertia Servo Motor
Family	MP-Series
Motor Type	Brushless rotary servo motor
Voltage Class	400/460 V
Armature Voltage	460 V class
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Torque	10.2 N·m
Peak Torque	27.1 N·m
Rated Output	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution class
Shaft	Keyed
Shaft Seal	None
Brake	24 V DC
Connector	SpeedTEC DIN
Connector Direction	Right angle
Connector Rotation	180°
Frame	130 mm
Frame Designation	45
Magnet Stack	101.6 mm
Mounting	IEC Metric
Approx. Motor Weight	8.6 kg
Dimensions	130 mm frame × 101.6 mm stack class
Main Applications	Packaging, indexing, assembly, material handling, printing, labeling, vertical positioning
Main Advantage	Low-inertia servo performance with integrated holding brake

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30. Final Product Evaluation

The MPL-B4540F-HJ74AA is a well-balanced industrial servo motor for applications that require controlled motion, rapid response, reliable feedback, and an integrated holding brake.

Its 130 mm frame and 101.6 mm magnet stack provide a useful combination of compact machine integration and relatively high torque capability.

With approximately 10.2 N·m of continuous torque and 27.1 N·m of peak torque, the motor can handle a wide range of medium-duty servo applications.

The 3000 rpm operating speed is appropriate for many packaging, indexing, assembly, material-handling, and machine-automation systems.

The low-inertia rotor helps the motor respond quickly to changing motion commands, making it particularly suitable for high-cycle equipment.

The incremental encoder provides the feedback required for closed-loop speed and position control.

The keyed shaft provides a conventional mechanical connection for couplings and transmission components.

The integrated 24 V DC brake is the feature that makes this configuration especially attractive for applications where the motor must help hold a load when active servo torque is removed.

For vertical axes and gravity-loaded mechanisms, this can be an important advantage.

At the same time, the motor should be selected as part of a complete servo system. Motor torque, peak torque, inertia, drive capacity, mechanical transmission ratio, acceleration profile, thermal duty cycle, feedback compatibility, brake requirements, and installation conditions should all be considered together.

In practical terms, the MPL-B4540F-HJ74AA can be summarized as a 130 mm-frame, 101.6 mm-stack, 3000 rpm low-inertia servo motor with approximately 10.2 N·m continuous torque, 27.1 N·m peak torque, incremental encoder feedback, keyed shaft, and 24 V DC holding brake.

It is a particularly suitable configuration when a machine requires dynamic servo performance but also needs a motor-mounted holding function.