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Allen-Bradley MPL-B4530F-HK74AA Servo Motor

1. Product Overview

The MPL-B4530F-HK74AA is a low-inertia brushless AC servo motor designed for industrial motion-control applications that require accurate positioning, controlled speed, fast acceleration, and repeatable machine movement.

It belongs to the MPL Series of permanent-magnet rotary servo motors and uses a 130 mm frame with a 76.2 mm magnetic stack length. The motor is designed for a 400 V-class servo system and has a rated speed of approximately 3000 rpm.

With approximately 8.25 N·m of continuous stall torque and approximately 20.3 N·m of peak torque, the motor provides a useful combination of continuous torque and short-duration acceleration capability.

The MPL-B4530F-HK74AA is particularly suitable for machinery that repeatedly accelerates, decelerates, stops, reverses, or moves between precisely defined positions. Its low-inertia rotor construction helps the motor respond quickly to changes in speed and command position.

A key feature of this particular model is the integrated 24 V DC holding brake. This makes it different from some closely related MPL-B4530F configurations without an integral brake and makes it more suitable for applications where the motor shaft needs to be held when servo power is removed.

The motor also uses a 2000-line incremental encoder, providing feedback for closed-loop servo control. This allows the associated servo drive and controller to monitor motor movement and continuously regulate the motor according to the commanded motion profile.

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2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Product Family	MPL Servo Motors
Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B4530F-HK74AA
Motor Type	AC permanent-magnet servo motor
Construction	Low-inertia brushless design
Frame Size	130 mm
Frame Size in Inches	Approximately 5.12 in
Magnet Stack Length	76.2 mm
Magnet Stack Length in Inches	3.0 in
Voltage Class	400 V AC
Nominal System Voltage	Approximately 460 V AC class
Rated Speed	Approximately 3000 rpm
Rated Output	Approximately 2.1 kW
Continuous Stall Torque	Approximately 8.25 N·m
Peak Torque	Approximately 20.3 N·m
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution
Shaft Configuration	Keyless shaft
Shaft Seal	No shaft seal
Holding Brake	24 V DC
Connector	Circular DIN / SpeedTec-style connector
Connector Orientation	Right-angle
Mounting	IEC metric flange
Approximate Weight	6.80 kg
Typical Application	Industrial servo motion control

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3. Main Technical Parameters

Parameter	Specification
Model	MPL-B4530F-HK74AA
Product Type	Rotary servo motor
Motor Technology	Permanent-magnet brushless servo
Series	MPL
Motor Construction	Low inertia
Voltage Class	400 V AC
System Voltage Class	Approximately 460 V AC
Frame Size	130 mm
Frame Size	5.12 in
Magnet Stack Length	76.2 mm
Magnet Stack Length	3.0 in
Rated Speed	3000 rpm
Rated Output	2.1 kW
Continuous Stall Torque	8.25 N·m
Peak Torque	Approximately 20.3 N·m
Rotor Inertia	Approximately 0.00040 kg·m²
Feedback Type	Incremental encoder
Encoder Resolution	2000 lines/revolution
Shaft	Keyless
Shaft Key	None
Shaft Seal	None
Holding Brake	24 V DC
Brake Type	Integral holding brake
Connector	Circular DIN / SpeedTec-style
Connector Style	Right-angle
Connector Rotation	180° rotatable configuration
Mounting Flange	IEC metric
Mounting Hole Arrangement	Free mounting holes
Housing	Industrial-duty motor housing
Cooling	Natural heat dissipation through motor housing
Approximate Weight	6.80 kg
Typical Operating Temperature	Approximately 0 to 40°C
Storage Temperature	Approximately -30 to 70°C
Main Function	Precision rotary motion
Control System	Closed-loop servo control

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4. Dimensions and Weight

The dimensional designation of the MPL-B4530F-HK74AA is particularly important when matching the motor to an existing machine.

The 45 portion of the motor family designation corresponds to the 130 mm frame class, while the 30 portion corresponds to the 76.2 mm magnetic stack length.

The motor therefore belongs to a relatively compact industrial frame class while still providing approximately 8.25 N·m of continuous stall torque.

Dimension / Mechanical Parameter	Specification
Model	MPL-B4530F-HK74AA
Frame Size	130 mm
Frame Size in Inches	Approx. 5.12 in
Magnet Stack Length	76.2 mm
Magnet Stack Length in Inches	3.0 in
Mounting Style	IEC metric flange
Shaft Type	Keyless
Shaft Key	No
Shaft Seal	No
Brake	24 V DC integral holding brake
Connector Position	Right-angle configuration
Connector	Circular DIN / SpeedTec-style
Mounting Hole Type	Free mounting holes
Overall Installation Envelope	Determined by the motor mechanical configuration and mounting drawing
Approximate Weight	6.80 kg

The 130 mm frame dimension and 76.2 mm stack length are the most useful basic dimensional references when comparing this model with other motors in the same family.

For an exact machine replacement, the mounting-hole pattern, shaft dimensions, pilot diameter, shaft extension, connector clearance, and overall motor length should be matched to the existing mechanical installation rather than relying only on frame size.

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5. Electrical Characteristics

The MPL-B4530F-HK74AA is designed for use in a 400 V-class AC servo system.

Its approximately 2.1 kW output rating places it in a useful mid-range industrial servo category. The motor is capable of producing approximately 8.25 N·m of continuous stall torque and approximately 20.3 N·m of peak torque.

The difference between continuous and peak torque is important when selecting the motor.

Continuous torque represents the motor’s ability to provide sustained torque under appropriate operating conditions, while peak torque is intended for short-duration dynamic conditions such as rapid acceleration, deceleration, or temporary increases in machine load.

Electrical / Performance Parameter	Value
Motor Type	Brushless permanent-magnet servo
Voltage Class	400 V AC
Nominal Voltage Class	460 V AC
Rated Output	2.1 kW
Rated Speed	3000 rpm
Continuous Stall Torque	8.25 N·m
Peak Torque	Approx. 20.3 N·m
Rotor Inertia	Approx. 0.00040 kg·m²
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution
Holding Brake	24 V DC
Motor Frame	130 mm
Magnet Stack	76.2 mm
Weight	Approx. 6.80 kg

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6. Feedback System

The MPL-B4530F-HK74AA uses a 2000-line incremental encoder for motor feedback.

Feedback is one of the most important elements of a servo motor system. The controller provides a desired position, speed, or motion profile, while the encoder provides information about the actual movement of the motor.

The servo drive can compare commanded motion with actual motor movement and continuously adjust the motor’s operation.

This makes the motor suitable for applications requiring:

• Accurate positioning.
• Repeatable indexing.
• Controlled acceleration.
• Controlled deceleration.
• Speed regulation.
• Electronic gearing.
• Coordinated multi-axis movement.
• Registration control.
• Repeated start/stop operation.
• Precise rotary positioning.

The incremental encoder is especially useful in conventional industrial automation systems where the servo drive and controller are designed to work with incremental motor feedback.

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7. Integrated 24 V DC Holding Brake

One of the most important characteristics of the MPL-B4530F-HK74AA is its integrated 24 V DC holding brake.

The brake is designed primarily to hold the motor shaft when the servo system is not actively controlling the motor.

This feature can be particularly valuable in applications where the motor needs to maintain its position while stopped.

Typical examples include:

• Vertical positioning axes.
• Lifting mechanisms.
• Z-axis machinery.
• Material handling axes.
• Automated positioning mechanisms.
• Machine axes that need to remain stationary during shutdown.
• Equipment where uncontrolled shaft movement is undesirable when servo power is removed.

The brake should not automatically be treated as the primary dynamic stopping mechanism. Application-specific stopping, safety, and load-holding requirements should be evaluated separately.

For a vertical axis, the complete mechanical and safety design should account for the load, gravity, transmission system, brake capacity, stopping requirements, and any additional mechanical holding mechanism that may be required.

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8. Shaft Configuration

The MPL-B4530F-HK74AA uses a keyless shaft.

A keyless shaft configuration can be useful when the motor is connected to a suitable coupling, clamp hub, pulley, gearbox, or other mechanical transmission component designed for a keyless shaft arrangement.

Compared with a conventional keyed shaft, the keyless design can provide a clean connection when the appropriate clamping component is selected.

The absence of a shaft key should be considered carefully when replacing an existing motor.

If the existing machine was designed around a keyed shaft, the replacement may require a different coupling or mechanical interface.

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9. Connector Configuration

The motor uses a circular DIN / SpeedTec-style connector arrangement with a right-angle configuration.

The connector design provides a compact connection arrangement for motor and feedback wiring.

The right-angle orientation can be useful in machines where the available installation space around the motor is limited.

The connector arrangement should be considered during machine design because sufficient clearance is required for cable connection, cable routing, bend radius, and maintenance access.

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10. Product Introduction

The MPL-B4530F-HK74AA is a precision industrial servo motor intended for machines where controlled rotary motion is a central part of the process.

It is designed around permanent-magnet brushless servo technology, which allows the motor to produce controlled torque under the command of a compatible servo drive.

The low-inertia design is especially useful in machines where motion changes frequently.

For example, an automated packaging machine may need to accelerate a conveyor section, move a product to a precise position, stop, reverse direction, and repeat the same cycle many times.

A low-inertia servo motor is well suited to this type of application because the motor can respond rapidly to changes in the commanded motion.

The approximately 8.25 N·m continuous torque rating provides a strong continuous torque capability, while the approximately 20.3 N·m peak torque capability provides additional torque during short-duration acceleration and transient load conditions.

The integrated 24 V DC holding brake adds another useful capability, especially for axes where the motor shaft needs to remain stationary after the servo drive is disabled.

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11. Low-Inertia Design

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

Motor inertia affects how quickly a motor can change its rotational speed.

When rotor inertia is relatively low, the motor can generally respond more quickly to changes in the commanded speed and torque, provided the drive, load, and mechanical transmission are correctly matched.

This is valuable in:

• Indexing machines.
• Pick-and-place equipment.
• Packaging machinery.
• Automated assembly systems.
• High-cycle production equipment.
• Rotary positioning tables.
• Registration systems.
• Cutting and feeding mechanisms.
• Synchronized conveyor systems.

The low-inertia design does not mean that every application should use the smallest possible motor.

The actual load inertia, acceleration requirement, gearbox ratio, coupling characteristics, friction, duty cycle, and required positioning time should all be considered during motor selection.

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12. Typical Applications

12.1 Packaging Machinery

The MPL-B4530F-HK74AA can be used in packaging equipment where accurate and repeatable movement is required.

Typical applications include:

• Film feeding.
• Product indexing.
• Cutting mechanisms.
• Sealing mechanisms.
• Label positioning.
• Packaging conveyors.
• Product alignment.
• Rotary indexing.

The encoder provides feedback for accurate movement, while the low-inertia motor design supports frequent acceleration and deceleration.

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12.2 Automated Assembly Equipment

Automated assembly machines often require fast and repeatable positioning.

The motor can be used for:

• Component positioning.
• Rotary indexing tables.
• Transfer mechanisms.
• Feeding systems.
• Insertion mechanisms.
• Automated adjustment mechanisms.
• Repeated positioning stations.

The integrated holding brake can also be useful where the motor shaft needs to remain stationary during machine idle conditions.

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12.3 Pick-and-Place Systems

Pick-and-place machines typically require rapid movement between predefined positions.

The low rotor inertia of the motor can help support fast acceleration and deceleration.

Possible applications include:

• Rotary pick-and-place axes.
• Transfer mechanisms.
• Product handling systems.
• Automated sorting mechanisms.
• Packaging transfer systems.

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12.4 Material Handling

The motor can be used in material-handling machinery where controlled motion and positioning are required.

Examples include:

• Servo conveyors.
• Indexing conveyors.
• Transfer units.
• Automated sorting systems.
• Positioning mechanisms.
• Lift-related motion systems.

When used on a vertical axis, the integrated brake becomes particularly important because the machine designer must consider how the load will be held when motor torque is removed.

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12.5 Printing Machinery

Printing equipment often requires synchronized motion between rollers, feeders, cutting units, and other mechanisms.

Servo motors can provide:

• Accurate speed control.
• Position synchronization.
• Registration control.
• Feed control.
• Roller coordination.
• Cutting synchronization.

The closed-loop feedback system allows the motor to participate in coordinated machine movement.

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12.6 Converting Equipment

Converting machinery often involves continuous material movement combined with precise cutting, feeding, or indexing.

Potential applications include:

• Web handling.
• Material feeding.
• Rotary cutting.
• Slitting systems.
• Registration control.
• Roller synchronization.
• Indexing mechanisms.

The motor’s speed and torque characteristics can be useful in applications that require repeated changes in machine operating conditions.

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12.7 Machine Tools

The MPL-B4530F-HK74AA may be suitable for selected auxiliary motion functions in machine tools.

Examples include:

• Automatic positioning.
• Indexing.
• Material feeding.
• Auxiliary rotary axes.
• Automated tool movement.
• Workpiece positioning.

The exact motor selection should be based on the required load, speed, acceleration, duty cycle, and mechanical transmission.

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13. Main Product Advantages

13.1 Low-Inertia Construction

The low-inertia rotor is well suited to applications that require rapid speed changes.

It can help reduce the time required for acceleration and deceleration when the motor and mechanical load are properly matched.

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13.2 Strong Continuous Torque

The approximately 8.25 N·m continuous stall torque gives the motor useful continuous torque capability for industrial automation applications.

This makes it suitable for mechanisms that need stable torque during extended or repeated operation.

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13.3 High Peak Torque

The approximately 20.3 N·m peak torque provides additional short-duration torque capability.

This is useful during:

• Acceleration.
• Deceleration.
• Sudden load changes.
• High-speed positioning.
• Short motion cycles.
• Rapid directional changes.

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13.4 Integrated Holding Brake

The 24 V DC holding brake is one of the most useful distinguishing characteristics of the HK74AA configuration.

It can help maintain shaft position when servo power is removed, subject to the brake’s actual mechanical rating and the complete machine design.

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13.5 Closed-Loop Feedback

The 2000-line incremental encoder provides motor feedback for closed-loop control.

This allows the servo system to regulate motor position and speed rather than relying solely on an open-loop command.

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13.6 3000 rpm Speed Capability

A 3000 rpm rated speed provides a useful operating range for many industrial positioning and rotary motion applications.

The actual operating speed should always be evaluated together with torque requirements and machine duty cycle.

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13.7 Compact Industrial Frame

The 130 mm frame provides a practical balance between motor size and torque capacity.

This makes the motor suitable for machinery where available installation space is important but the application still requires substantial servo torque.

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13.8 Keyless Shaft

The keyless shaft configuration provides flexibility when used with compatible clamping couplings and mechanical transmission components.

It can be especially useful in applications designed around precision shaft coupling.

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14. Operating Environment

The motor is intended for industrial environments within appropriate temperature and installation limits.

A commonly specified operating range for this configuration is approximately 0 to 40°C, under non-condensing conditions.

Storage conditions can extend to approximately -30 to 70°C, also under appropriate non-condensing conditions.

Environmental Parameter	Typical Value
Model	MPL-B4530F-HK74AA
Operating Temperature	Approx. 0 to 40°C
Storage Temperature	Approx. -30 to 70°C
Operating Environment	Industrial, non-condensing
Cooling	Natural heat dissipation
Motor Construction	Industrial-duty
Installation	Machine-mounted flange installation

Actual environmental suitability should be evaluated against the complete machine installation, enclosure, contamination level, vibration, humidity, temperature, and required protection level.

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15. Mechanical Installation

The MPL-B4530F-HK74AA uses an IEC metric flange mounting arrangement.

The 130 mm frame size provides a standardized mechanical reference for mounting.

However, replacing a servo motor should never be based only on frame size.

The following items should be checked:

• Mounting flange dimensions.
• Mounting hole pattern.
• Pilot diameter.
• Shaft diameter.
• Shaft extension.
• Motor body length.
• Connector clearance.
• Cable routing.
• Brake wiring.
• Feedback wiring.
• Coupling dimensions.
• Available mechanical clearance.
• Motor-to-load alignment.

A replacement motor should be mechanically and electrically compatible with the complete machine.

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16. Servo System Integration

The motor is intended to operate as part of a complete servo system.

A typical system may include:

1. Motion controller.
2. Servo drive.
3. Servo motor.
4. Encoder feedback.
5. Motor power cable.
6. Feedback cable.
7. Brake wiring where applicable.
8. Mechanical coupling.
9. Gearbox or transmission, if required.
10. Machine load.

The controller establishes the desired motion profile.

The servo drive processes the command and regulates the motor.

The encoder provides feedback about actual motor movement.

The motor converts electrical power into controlled mechanical rotation.

The mechanical transmission then transfers the motor’s torque to the machine mechanism.

This closed-loop arrangement is what makes the system suitable for precise industrial automation.

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17. Five Same-Series or Closely Related Models

The following models are useful related selections within the MPL family. The exact suffix configuration should always be checked before using any model as a direct replacement because feedback, brake, shaft, connector, and other mechanical or electrical characteristics may differ.

Model	Series	Frame	Stack Length	Speed	Continuous Torque	Peak Torque	Power	Weight
MPL-B4530F-HJ72AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg
MPL-B4530F-HK72AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg
MPL-B4530F-MJ72AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg
MPL-B4530F-MK74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg
MPL-B4530F-SJ74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg

The models listed above are closely related to the MPL-B4530F-HK74AA family.

The major differences between individual suffix configurations are generally associated with feedback, shaft configuration, brake arrangement, connector configuration, or other option-specific characteristics.

For replacement work, the complete part number should therefore be matched rather than assuming that all MPL-B4530F motors are interchangeable.

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18. Five Popular Models from the Same Brand

The following models are useful alternatives for applications requiring different combinations of speed, torque, power, or physical size.

Model	Series	Frame	Speed	Continuous Torque	Peak Torque	Rated Power	Approx. Weight	Main Characteristic
MPL-B430P-MK74AA	MPL Low-Inertia	115 mm class	5000 rpm	Approx. 6.55 N·m	Approx. 19.8 N·m	2.2 kW	Approx. 5.5 kg	Higher-speed compact servo
MPL-B430P-MK72AA	MPL Low-Inertia	115 mm class	5000 rpm	Approx. 6.55 N·m	Approx. 19.8 N·m	2.2 kW	Approx. 5.5 kg	High-speed motion
MPL-B4530F-MK74AA	MPL Low-Inertia	130 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	Approx. 7.3 kg	Similar torque class
MPL-B4540F-MJ74AA	MPL Low-Inertia	130 mm class	3000 rpm	Approx. 10.2 N·m	Approx. 27.1 N·m	2.6 kW	Approx. 8.6 kg	Higher torque
MPL-B4560F-MJ74AA	MPL Low-Inertia	130 mm class	3000 rpm	Approx. 14.1 N·m	Approx. 34.4 N·m	3.2 kW	Approx. 11.82 kg	High-torque application

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19. Model Comparison

Model	Speed	Continuous Torque	Peak Torque	Power	Frame	Approx. Weight	Suitable Application
MPL-B430P-MK74AA	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm	5.5 kg	High-speed positioning
MPL-B430P-MK72AA	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm	5.5 kg	Compact high-speed motion
MPL-B4530F-HK74AA	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	6.80 kg	General industrial servo motion
MPL-B4540F-MJ74AA	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	130 mm class	8.6 kg	Higher-load positioning
MPL-B4560F-MJ74AA	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	130 mm class	11.82 kg	Heavy-duty servo motion

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20. Why Choose MPL-B4530F-HK74AA?

The MPL-B4530F-HK74AA is a strong choice when the application needs more than simple motor rotation.

Its main value comes from the combination of:

• 2.1 kW output.
• 8.25 N·m continuous stall torque.
• Approximately 20.3 N·m peak torque.
• 3000 rpm speed capability.
• Low-inertia rotor design.
• 2000-line incremental feedback.
• 24 V DC holding brake.
• 130 mm frame.
• 76.2 mm magnetic stack.
• Keyless shaft.
• Industrial flange mounting.

This combination makes it suitable for many medium-duty motion-control applications.

It is particularly attractive when the machine requires both dynamic servo response and a holding brake.

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21. Applications That Benefit from the Integrated Brake

The brake-equipped configuration is particularly useful when a machine axis must remain stationary when the motor is not being actively driven.

Potential applications include:

Vertical Axis Machines

A vertical axis can be affected by gravity when servo power is removed.

A holding brake can provide an additional means of maintaining the motor shaft position.

Lifting Equipment

Position-controlled lifting mechanisms may benefit from an integrated brake.

Z-Axis Machinery

Automated equipment with vertical positioning axes can use a brake-equipped servo configuration when appropriate.

Material Transfer Systems

Some transfer mechanisms require the load to remain stationary during machine stops.

Automated Assembly

Certain assembly mechanisms need the axis to remain fixed while another machine operation is being performed.

The brake should always be evaluated according to the actual load and safety requirements.

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22. Advantages for Industrial Automation

Requirement	MPL-B4530F-HK74AA Advantage
Precise Positioning	Incremental encoder feedback
Fast Motion	Low-inertia rotor
Rapid Acceleration	High peak torque
Repeated Indexing	Closed-loop servo control
Vertical Axis Holding	Integrated 24 V DC brake
Speed Control	Servo drive feedback control
Multi-Axis Coordination	Suitable for synchronized motion
Compact Installation	130 mm frame
Mechanical Flexibility	Keyless shaft
Industrial Integration	IEC metric flange
High-Cycle Operation	Servo motor construction
Controlled Stopping	Active servo control plus holding brake

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23. Selection Considerations

Before selecting the MPL-B4530F-HK74AA as a replacement or new installation, several points should be evaluated.

Motor Power

The 2.1 kW rating should be compared with the actual machine load rather than selected solely from the previous motor’s nameplate.

Continuous Torque

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

Peak Torque

Acceleration, deceleration, and transient loads should be checked against the available peak torque.

Motor Inertia

The motor rotor inertia and machine load inertia should be evaluated together.

Speed

The required operating speed should remain within the appropriate motor operating range.

Brake Requirement

The integrated 24 V DC brake makes this configuration attractive for applications requiring shaft holding.

Feedback

The 2000-line incremental encoder must be compatible with the selected servo drive and control system.

Shaft

Because this motor uses a keyless shaft, the coupling must be suitable for a keyless shaft connection.

Mounting

The 130 mm frame and IEC metric flange should be matched to the machine’s mounting structure.

Connector

Cable and connector clearance should be checked before installation.

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24. Replacement Considerations

If the MPL-B4530F-HK74AA is being used as a replacement motor, the following information should ideally be checked against the original motor:

Replacement Item	Check Required
Model Number	Confirm complete part number
Frame Size	130 mm
Stack Length	76.2 mm
Rated Speed	3000 rpm
Rated Power	2.1 kW
Continuous Torque	8.25 N·m
Peak Torque	Approx. 20.3 N·m
Feedback	2000-line incremental encoder
Shaft	Keyless
Brake	24 V DC holding brake
Connector	Circular DIN / right-angle
Mounting	IEC metric flange
Weight	Approx. 6.80 kg
Mechanical Envelope	Confirm exact installation dimensions
Drive Compatibility	Confirm before commissioning
Cable Compatibility	Confirm motor and feedback cables
Brake Wiring	Confirm 24 V DC brake circuit

A motor that looks similar externally may still have a different feedback or brake configuration, so complete model-number verification is important.

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25. Product Strengths at a Glance

The MPL-B4530F-HK74AA offers a practical combination of performance and mechanical features.

Its major strengths include:

Low-inertia response:
The motor is designed for applications involving frequent changes in speed and position.

Strong torque output:
Approximately 8.25 N·m of continuous stall torque provides a useful level of continuous torque for industrial machinery.

High short-duration torque:
Approximately 20.3 N·m of peak torque supports demanding acceleration and transient load conditions.

Integrated holding brake:
The 24 V DC brake adds an important mechanical holding function for suitable applications.

Closed-loop operation:
The 2000-line incremental encoder provides feedback for servo control.

Compact industrial format:
The 130 mm frame and 76.2 mm stack provide a useful balance between physical size and motor performance.

Flexible mechanical connection:
The keyless shaft can work well with appropriate precision coupling systems.

Broad industrial application range:
The motor can be applied to packaging, assembly, indexing, material handling, printing, converting, and machine automation.

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26. Complete Technical Summary

Category	Detailed Specification
Model	MPL-B4530F-HK74AA
Brand	Allen-Bradley
Product Family	MPL Servo Motors
Series	MPL Low-Inertia Brushless Servo Motors
Motor Type	AC permanent-magnet rotary servo
Motor Construction	Low-inertia brushless
Voltage Class	400 V AC
System Voltage Class	Approximately 460 V AC
Frame Size	130 mm
Frame Size	Approximately 5.12 in
Magnet Stack Length	76.2 mm
Magnet Stack Length	3.0 in
Rated Speed	3000 rpm
Rated Output	2.1 kW
Continuous Stall Torque	8.25 N·m
Peak Torque	Approx. 20.3 N·m
Rotor Inertia	Approx. 0.00040 kg·m²
Feedback	Incremental encoder
Encoder Resolution	2000 lines/revolution
Shaft	Keyless
Shaft Key	None
Shaft Seal	None
Brake	24 V DC holding brake
Connector	Circular DIN / SpeedTec-style
Connector Configuration	Right-angle
Connector Rotation	180° rotatable configuration
Mounting	IEC metric flange
Mounting Holes	Free mounting holes
Approximate Weight	6.80 kg
Typical Operating Temperature	Approx. 0 to 40°C
Typical Storage Temperature	Approx. -30 to 70°C
Primary Use	Industrial servo motion
Control	Closed-loop servo control
Typical Applications	Packaging, assembly, indexing, material handling, printing, converting, machine automation

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27. Final Product Description

The MPL-B4530F-HK74AA is a 130 mm-frame low-inertia brushless AC servo motor designed for industrial automation systems requiring accurate, repeatable, and responsive rotary motion.

With approximately 2.1 kW of rated output, 8.25 N·m of continuous stall torque, and approximately 20.3 N·m of peak torque, the motor provides a balanced performance level for medium-duty servo applications.

Its approximately 3000 rpm speed capability makes it suitable for a wide range of positioning and rotary motion systems, while the low-inertia rotor design helps the motor respond effectively to frequent speed and position changes.

The 2000-line incremental encoder provides closed-loop feedback, allowing the servo drive to monitor motor movement and make continuous adjustments according to the required motion profile.

A particularly important feature of this model is the 24 V DC holding brake. This makes the HK74AA configuration especially useful for applications where the shaft must remain stationary when the motor is not actively producing torque.

The keyless shaft provides a flexible mechanical connection when used with an appropriate coupling or clamping hub. The 130 mm frame and 76.2 mm magnetic stack provide a useful combination of motor size and torque capacity.

The MPL-B4530F-HK74AA is therefore well suited to applications such as packaging machinery, indexing systems, automated assembly equipment, pick-and-place machinery, material handling, printing equipment, converting machinery, machine-tool auxiliary axes, and other industrial automation systems.

For machine replacement or new equipment design, the most important selection factors include motor torque, peak acceleration requirements, load inertia, operating speed, feedback compatibility, brake requirements, shaft configuration, mounting dimensions, connector arrangement, and servo-drive compatibility.

Overall, the MPL-B4530F-HK74AA is a versatile industrial servo motor that combines low-inertia dynamic response, reliable continuous torque, high short-duration torque capability, encoder feedback, and an integrated holding brake in a compact 130 mm-frame package.