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MPL-B4530K-HK74AA — Detailed Product Description, Specifications, Applications, Advantages and Related Models

1. Product Overview

The MPL-B4530K-HK74AA is a low-inertia AC rotary servo motor belonging to the MP-Series MPL family.

It is designed for industrial motion-control applications that require a combination of high rotational speed, responsive acceleration and deceleration, closed-loop feedback, repeatable positioning, and reliable mechanical integration.

The motor uses a 460 V-class electrical configuration and is designed for operation in industrial servo systems. It has a 130 mm frame size, a 76.2 mm magnet stack length, a rated speed of 4000 rpm, and a rated torque of approximately 8.25 N·m.

One of the most important characteristics of this particular model is the integrated 24 V DC holding brake. Compared with the corresponding no-brake configuration, the brake-equipped version is heavier and is intended for applications where the load must be held mechanically when the servo motor is stopped or when the machine requires a holding function.

The MPL-B4530K-HK74AA uses a 2000-line incremental encoder for feedback. This allows the servo drive and motion controller to monitor motor movement and regulate the axis in a closed-loop control system.

The motor also features a keyless shaft extension and a right-angle SpeedTEC DIN connector. The connector arrangement can be rotated through 180°, which provides useful flexibility for machine builders when routing motor cables and designing compact equipment.

The model is therefore particularly suitable for machinery requiring dynamic servo motion together with a mechanical holding-brake function.

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2. Product Identification

Item	Specification
Model	MPL-B4530K-HK74AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Product Type	AC Rotary Servo Motor
Motor Technology	Permanent-magnet brushless AC servo
Voltage Class	460 V AC class
Nominal Supply Class	480 V AC
Rated Speed	4000 rpm
Rated Torque	Approximately 8.25 N·m
Frame Size	130 mm
Frame Designation	Frame 45
Magnet Stack Length	76.2 mm
Stack Designation	30
Feedback	2000-line incremental encoder
Feedback Type	Incremental encoder
Shaft	Keyless shaft extension
Shaft Key	No shaft key
Shaft Seal	No shaft seal
Brake	24 V DC holding brake
Connector	SpeedTEC DIN connector
Connector Arrangement	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric
Mounting Holes	Free mounting holes, Type FF
Motor Inertia	Low-inertia design
Approximate Weight	9.5 kg
Frame Width	130 mm nominal
Frame Height	130 mm nominal
Magnet Stack	76.2 mm
Main Application	Industrial motion control
Typical Drive Application	Servo positioning, speed and torque control

The key specifications above identify this motor as a high-speed, low-inertia servo motor with incremental feedback and an integrated 24 V DC brake.

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3. Detailed Technical Parameters

Parameter	MPL-B4530K-HK74AA
Model	MPL-B4530K-HK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Low-inertia brushless AC servo motor
Electrical Class	460 V AC
Rated Voltage Category	480 V class
Rated Speed	4000 rpm
Rated Torque	Approx. 8.25 N·m
Motor Frame	130 mm
Frame Designation	45
Magnet Stack Length	76.2 mm
Stack Designation	30
Feedback Device	2000-line incremental encoder
Feedback Resolution	2000 lines/revolution
Feedback Technology	Incremental
Shaft Configuration	Keyless
Shaft Key	Not provided
Shaft Seal	Not provided
Brake Type	24 V DC brake
Brake Function	Holding brake
Connector Type	SpeedTEC DIN
Connector Orientation	Right-angle
Connector Adjustment	180° rotatable
Mounting Standard	IEC metric
Mounting Hole Type	Free mounting holes / Type FF
Housing Type	Industrial servo motor housing
Motor Design	Low inertia
Approximate Weight	9.5 kg
Nominal Frame Width	130 mm
Nominal Frame Height	130 mm
Magnet Stack Dimension	76.2 mm
Overall Installation Envelope	Must be checked against the applicable mechanical drawing
Typical Control	Closed-loop servo control
Typical Motion Functions	Position, velocity and torque control

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4. Dimensions and Physical Characteristics

The MPL-B4530K-HK74AA uses a 130 mm frame size.

In the MPL model designation, the frame and stack information is particularly useful when comparing motors of different torque and speed capabilities.

The 130 mm frame corresponds to the frame-size designation used within this MPL motor family, while the 30 stack designation corresponds to a 76.2 mm magnet stack length.

For practical machine design, the frame size should not be treated as the complete motor envelope. The shaft extension, connector, brake wiring, mounting flange and cable routing area must also be taken into consideration.

Physical Parameter	Value
Model	MPL-B4530K-HK74AA
Frame Size	130 mm
Frame Width	130 mm nominal
Frame Height	130 mm nominal
Magnet Stack Length	76.2 mm
Frame Designation	45
Stack Designation	30
Shaft Configuration	Keyless
Connector	Right-angle SpeedTEC DIN
Connector Rotation	180°
Brake	24 V DC
Product Weight	9.5 kg
Mounting System	IEC metric
Mounting Holes	Free mounting holes, Type FF
Overall Length	Configuration-dependent; verify against mechanical drawing
Rear Clearance	Required for connector and brake-cable routing
Shaft Clearance	Dependent on coupling and machine design

The 9.5 kg weight is an important distinction between this brake-equipped model and similar MPL-B4530K motors without a brake.

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5. Product Series

The MPL-B4530K-HK74AA belongs to the:

MP-Series → MPL → Low-Inertia Brushless Servo Motor

The MPL series is designed for industrial servo applications where dynamic motion performance is required.

The series includes different frame sizes, stack lengths, speed classes, feedback technologies, shaft configurations and brake configurations.

Within the B4530K group, there are several closely related configurations. They can share the same basic frame and stack arrangement while differing in feedback technology, brake availability or shaft configuration.

This makes the MPL family particularly useful for machine builders because the motor can be selected according to the actual requirements of an individual motion axis.

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6. Meaning of the Main Model Configuration

The model MPL-B4530K-HK74AA can be understood as a combination of mechanical, electrical and feedback configuration information.

The MPL designation identifies the low-inertia servo motor family.

The B45 section corresponds to the relevant frame family, associated with a nominal 130 mm frame.

The 30 section identifies the 76.2 mm magnet stack.

The K configuration corresponds to the 4000 rpm motor class.

The H feedback designation is associated with the incremental encoder configuration.

The K shaft designation identifies the keyless shaft configuration.

The 74 configuration indicates the version with a 24 V DC brake.

The final configuration characters complete the motor’s specific manufacturing and mounting arrangement.

The exact suffix is important because motors with similar-looking model numbers can have significantly different feedback or brake arrangements.

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7. Product Introduction

The MPL-B4530K-HK74AA is intended for applications where a conventional motor does not provide sufficient positioning, acceleration or synchronization performance.

A servo motor is part of a complete motion-control system. The motor normally works together with a servo drive, controller and feedback system.

The encoder continuously provides motion feedback. The drive uses this feedback to control the motor according to the command received from the motion controller.

This allows the motor to perform controlled acceleration, controlled deceleration, positioning, speed regulation and coordinated movement.

The low-inertia construction is especially valuable when the machine performs repeated changes in speed.

For example, a packaging machine may need to accelerate quickly, reach a defined position, stop, hold the load, and then repeat the same movement hundreds or thousands of times during a production cycle.

The MPL-B4530K-HK74AA is well suited to this type of operating pattern when its torque, speed and load-inertia requirements are correctly matched.

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8. 24 V DC Holding Brake

The integrated 24 V DC brake is one of the main features distinguishing the HK74AA configuration from the corresponding HK72AA no-brake configuration.

The brake is primarily intended as a holding function, rather than as a substitute for a machine’s primary dynamic stopping system.

This distinction is important in engineering applications.

When the motor is stationary, the brake can provide mechanical holding force for an appropriate load.

This can be useful in vertical axes, positioning systems, lifting mechanisms, machine slides and other applications where the load must remain in position after the servo motor has stopped producing torque.

Brake Parameter	Specification
Model	MPL-B4530K-HK74AA
Brake Type	Holding brake
Brake Voltage	24 V DC
Main Purpose	Holding a stationary load
Brake Version	Yes
Corresponding No-Brake Configuration	HK72AA
Typical Application	Vertical or gravity-loaded axes
Engineering Consideration	Brake capacity must be matched to actual load requirements

The brake should be incorporated into the machine’s overall safety and stopping strategy rather than being treated as the sole means of stopping a moving load.

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9. Encoder and Feedback System

The motor uses a 2000-line incremental encoder.

Encoder feedback is essential for closed-loop servo operation because the controller needs information about motor movement in order to regulate the axis.

The encoder allows the drive to determine rotational movement and use this information to control speed and position.

For applications involving repeated indexing, synchronized axes, electronic gearing or coordinated motion, feedback is a fundamental part of the servo system.

The 2000-line incremental encoder also differentiates this model from MPL variants that use resolver feedback or higher-resolution multi-turn feedback.

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10. Keyless Shaft Design

The motor has a keyless shaft extension.

A keyless shaft can be particularly convenient when a machine uses an appropriate clamping-type coupling.

The mechanical coupling should be selected based on:

• Motor shaft diameter.
• Coupling torque capacity.
• Maximum operating speed.
• Radial loading.
• Axial loading.
• Alignment requirements.
• Coupling bore.
• Machine vibration.
• Required service life.

The keyless arrangement can provide a clean mechanical connection while avoiding the need to align a traditional shaft key and keyway.

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11. Connector Configuration

The MPL-B4530K-HK74AA uses a right-angle SpeedTEC DIN connector.

The connector is designed for quick connection and can be rotated through approximately 180°.

This is particularly useful in compact machine designs.

For example, if a motor is mounted close to a machine frame, a straight connector can require additional rear clearance. A right-angle arrangement can make cable routing easier.

The rotatable connector also gives the installer additional flexibility when determining the direction of the motor cable.

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12. Main Product Advantages

12.1 High-Speed Operation

The motor is rated for approximately 4000 rpm.

This makes it appropriate for machinery where fast rotary movement is important.

High-speed servo operation can increase machine throughput when the mechanical system is designed to safely handle the required rotational speed.

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12.2 Low-Inertia Rotor

The low-inertia design allows the motor to change speed rapidly.

This is particularly useful in machines that repeatedly accelerate and decelerate.

A lower motor inertia can also make it easier for the servo system to achieve a responsive motion profile when the mechanical load is correctly matched.

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12.3 Integrated Holding Brake

The 24 V DC brake provides a mechanical holding function.

This is a major advantage for applications where the axis must remain stationary when servo torque is removed.

Typical examples include vertical motion axes, lifting equipment, positioning slides and machine mechanisms where gravity can cause movement when the motor is not energized.

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12.4 Incremental Encoder Feedback

The 2000-line incremental encoder provides closed-loop motion feedback.

This supports accurate speed control and repeatable motion.

It is particularly valuable in automated machinery where position and speed must be controlled repeatedly.

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12.5 Keyless Shaft

The keyless shaft configuration allows flexible coupling selection.

It can be particularly useful for machines using modern clamping couplings and compact transmission arrangements.

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12.6 Compact 130 mm Frame

The 130 mm frame provides a relatively compact package for an industrial servo motor in this performance class.

This can help machine builders achieve a balance between motor output and available installation space.

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12.7 Rotatable Right-Angle Connector

The 180° rotatable connector provides flexibility when installing the motor.

Cable routing can be adjusted according to the physical layout of the machine.

This can reduce interference between motor cables, machine guards, structural members and other equipment.

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13. Typical Applications

Packaging Machinery

Packaging machinery is one of the most suitable application categories.

The motor can be used for indexing, feeding, sealing, cutting, positioning and synchronized movement.

The high-speed capability supports rapid production cycles, while the encoder provides feedback for accurate motion control.

The holding brake can be useful for axes that must remain stationary during machine stops.

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Vertical Positioning Systems

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

Examples include:

• Vertical positioning mechanisms.
• Lifting platforms.
• Machine slides.
• Pick-and-place vertical axes.
• Material handling mechanisms.
• Automated positioning systems.

In these applications, the brake can help hold the load when the motor is stopped.

The brake must always be properly sized for the actual mechanical load and safety requirements.

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Material Handling

Material-handling systems often require rapid movement and controlled stopping.

The motor can be used for positioning conveyors, transfer mechanisms and automated handling axes.

The servo feedback system allows the motion controller to coordinate movement with other machine functions.

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Assembly Machinery

Assembly machines frequently require accurate and repeatable movement.

The MPL-B4530K-HK74AA can be used for:

• Indexing.
• Insertion.
• Positioning.
• Transfer.
• Clamping mechanisms.
• Synchronized axes.

The encoder allows the servo system to maintain controlled movement rather than simply running the motor at a fixed speed.

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Printing Machinery

Printing equipment can require accurate synchronization between rollers, feeding systems and other machine mechanisms.

The 4000 rpm operating capability and closed-loop feedback can be useful where high production speed and controlled movement are required.

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Converting Machinery

Converting equipment includes applications such as cutting, slitting, feeding and web handling.

Servo motors can provide controlled speed and synchronization between multiple mechanical sections.

The low-inertia characteristics of the MPL design can be useful for applications requiring frequent speed changes.

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Machine Tools

The motor can also be considered for suitable machine-tool axes and auxiliary motion mechanisms.

The actual selection depends on torque, speed, duty cycle, accuracy, load inertia and drive compatibility.

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14. Application Advantages

Application	Main Advantage of MPL-B4530K-HK74AA
Packaging	Fast indexing and repeatable motion
Vertical axis	Integrated 24 V DC holding brake
Material handling	Controlled acceleration and positioning
Assembly	Repeatable servo positioning
Printing	Speed control and synchronization
Converting	High-speed dynamic operation
Machine tools	Closed-loop speed and position control
Pick-and-place	Rapid acceleration and deceleration
Indexing systems	Accurate repetitive motion
Automated production equipment	Coordinated multi-axis motion

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15. Five Recommended Same-Series or Closely Related Models

The following models are particularly relevant when comparing the MPL-B4530K-HK74AA with motors that share the same general frame and stack configuration.

Model	Series	Voltage Class	Speed	Feedback	Shaft	Brake	Frame / Stack	Weight
MPL-B4530K-HK72AA	MP-Series MPL	460 V	4000 rpm	2000-line incremental encoder	Keyless	No brake	130 mm / 76.2 mm	Approx. 6.8 kg
MPL-B4530K-HJ74AA	MP-Series MPL	460 V	4000 rpm	2000-line incremental encoder	Keyed	24 V DC	130 mm / 76.2 mm	Approx. 9.5 kg class
MPL-B4530K-MK74AA	MP-Series MPL	460 V	4000 rpm	Multi-turn high-resolution	Keyless	24 V DC	130 mm / 76.2 mm	Approx. 9.5 kg class
MPL-B4530K-RK74AA	MP-Series MPL	460 V	4000 rpm	Resolver	Keyless	24 V DC	130 mm / 76.2 mm	Approx. 9.5 kg class
MPL-B4530F-HK74AA	MP-Series MPL	460 V	3000 rpm	2000-line incremental encoder	Keyless	24 V DC	130 mm / 76.2 mm	Approx. 9 kg class

These models are useful comparisons because they maintain much of the same mechanical family while changing one or more important characteristics such as feedback type, shaft configuration, brake configuration or rated speed. The MPL-B4530K family includes 4000 rpm encoder, multi-turn, resolver and other configurations.

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16. Detailed Comparison of Related Models

Characteristic	MPL-B4530K-HK74AA	MPL-B4530K-HK72AA	MPL-B4530K-MK74AA	MPL-B4530K-RK74AA	MPL-B4530F-HK74AA
Series	MPL	MPL	MPL	MPL	MPL
Frame	130 mm	130 mm	130 mm	130 mm	130 mm
Stack	76.2 mm	76.2 mm	76.2 mm	76.2 mm	76.2 mm
Speed	4000 rpm	4000 rpm	4000 rpm	4000 rpm	3000 rpm
Feedback	2000-line incremental	2000-line incremental	Multi-turn high-resolution	Resolver	2000-line incremental
Shaft	Keyless	Keyless	Keyless	Keyless	Keyless
Brake	24 V DC	None	24 V DC	24 V DC	24 V DC
Connector	Right-angle SpeedTEC DIN	Right-angle SpeedTEC DIN	Right-angle SpeedTEC DIN	Right-angle SpeedTEC DIN	Right-angle SpeedTEC DIN
Weight	Approx. 9.5 kg	Approx. 6.8 kg	Approx. 9.5 kg class	Approx. 9.5 kg class	Approx. 9 kg class
Main Advantage	Brake + high speed	Lower weight	Advanced feedback	Resolver feedback	Lower-speed alternative

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17. Five Popular Models from the Same Brand

For a broader product comparison, the following models represent commonly used products from the same automation brand across servo motors and motion-control equipment.

Model	Product Family	Product Type	Main Rating / Function	Feedback / Control	Dimensions	Weight
MPL-B4530K-HK72AA	MP-Series MPL	AC servo motor	460 V, 4000 rpm, approx. 8.25 N·m	2000-line incremental	130 mm frame / 76.2 mm stack	Approx. 6.8 kg
MPL-B4540K-HK74AA	MP-Series MPL	AC servo motor	460 V, high-performance servo	Incremental encoder	130 mm frame / 101.6 mm stack	Approx. 10 kg class
MPL-B4530K-MK74AA	MP-Series MPL	AC servo motor	460 V, 4000 rpm	Multi-turn high-resolution	130 mm frame / 76.2 mm stack	Approx. 9.5 kg class
2097-V31PR0-LM	Kinetix 350	Servo drive	120–240 V AC class	EtherNet/IP motion	Approx. 238 × 185 × 78 mm	Approx. 1.4 kg
2094-BM02-S	Kinetix 6000	Servo axis module	360–480 V AC class	Multi-axis motion system	Approx. 70 × 285 × 255 mm class	Approx. 3.1 kg

These models cover different parts of the same broader motion-control ecosystem, so they should not be regarded as direct replacements for one another. The motor models are relevant when comparing servo-motor configurations, while the Kinetix models are drive products intended to operate as part of a compatible motion-control system.

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18. Why the HK74AA Version Can Be Preferable to the HK72AA Version

The most obvious difference between the HK74AA and HK72AA versions is the brake.

The HK74AA includes a 24 V DC holding brake, whereas the corresponding HK72AA configuration does not include a brake.

This difference matters greatly in certain machine applications.

For a horizontal axis where the load naturally remains stationary, a brake may not be necessary.

For a vertical axis, however, the situation can be different.

If power is removed from a vertical servo motor, gravity may cause the load to move.

A properly selected holding brake can provide an additional mechanical holding function.

Therefore, the HK74AA version is particularly attractive for vertical or gravity-loaded applications where a holding brake is required.

The additional brake also increases the motor weight, with the HK74AA listed at approximately 9.5 kg.

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19. Motor Performance Characteristics

The motor’s performance can be summarized through four major characteristics:

High Speed

The 4000 rpm rating makes it suitable for high-speed industrial motion.

Low Inertia

The low-inertia design helps the motor respond quickly to changes in command.

Closed-Loop Feedback

The 2000-line encoder allows the control system to monitor motor movement.

Mechanical Holding

The 24 V DC brake provides an additional holding function when the motor is stationary.

These four characteristics make the motor particularly useful for dynamic machine axes.

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20. Benefits for Machine Builders

For machine builders, selecting the correct servo motor is not only about achieving the required torque.

The mechanical package is equally important.

The MPL-B4530K-HK74AA combines a 130 mm frame with a 76.2 mm stack and a right-angle connector.

This arrangement can simplify the integration of the motor into automated equipment.

The keyless shaft provides flexibility for coupling selection.

The 24 V DC brake is useful when a holding function is needed.

The encoder provides the feedback required for closed-loop motion.

The low-inertia construction supports fast dynamic response.

Together, these characteristics make the motor suitable for a broad range of automated production equipment.

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21. Selection Considerations

Before specifying the MPL-B4530K-HK74AA for a machine, the following parameters should be evaluated.

Selection Factor	What Should Be Checked
Motor torque	Continuous and peak torque requirements
Speed	Required maximum operating speed
Load inertia	Total reflected load inertia
Acceleration	Required acceleration time
Deceleration	Required stopping time
Duty cycle	Continuous, intermittent or cyclic operation
Brake	Required holding torque and safety function
Feedback	Incremental encoder compatibility
Shaft	Keyless coupling compatibility
Mounting	Flange and mounting-hole compatibility
Connector	Available rear clearance
Cable	Correct motor and brake cable arrangement
Drive	Servo-drive compatibility
Controller	Motion-controller compatibility
Environment	Temperature, contamination and installation conditions
Mechanical load	Radial and axial shaft loading
Machine safety	Brake and stopping strategy

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22. Brake Selection Considerations

When the brake is being used for a vertical axis, several points deserve special attention.

The brake should not simply be selected because the motor includes a brake.

The required holding torque should be calculated from the actual machine load.

The mechanical transmission ratio, screw pitch, pulley diameter, gearbox ratio and gravitational load all affect the required brake holding capability.

The machine’s safety concept should also determine how the brake is controlled.

A servo brake can be useful as a holding mechanism, but the machine designer should determine whether additional mechanical safety provisions are required.

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23. Servo Motor Application Examples

Example 1 — Vertical Lift Axis

A vertical lifting mechanism needs to move rapidly between two positions and remain stationary after reaching the required height.

The motor provides servo-controlled movement.

The encoder provides feedback.

The brake provides a holding function when the axis is stationary.

This is a natural application for the HK74AA configuration.

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Example 2 — Automated Packaging Axis

A packaging machine needs to index products accurately and repeatedly.

The servo motor accelerates quickly, reaches the required position and decelerates.

The encoder provides feedback for accurate positioning.

If the axis also needs to remain mechanically held during certain machine states, the integrated brake can be useful.

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Example 3 — Automated Assembly Axis

An assembly machine may need to move a tool or workpiece between multiple programmed positions.

Servo feedback provides repeatable positioning.

The low-inertia design allows rapid motion changes.

The brake can provide additional holding capability where required.

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24. Advantages Compared with a General-Purpose AC Motor

Feature	MPL-B4530K-HK74AA	General-Purpose AC Motor
Position control	Excellent with servo system	Limited without additional equipment
Speed control	High precision	Generally lower precision
Feedback	Integrated encoder	Usually none
Acceleration response	Fast	Generally slower
Dynamic positioning	Excellent	Limited
Holding brake	Integrated 24 V DC option	Application-dependent
High-speed motion	Suitable	Depends heavily on motor/drive
Repetitive indexing	Excellent	Generally unsuitable
Multi-axis synchronization	Suitable	Requires additional control architecture
Industrial automation	Highly suitable	Better suited to simpler applications

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25. Maintenance Considerations

The motor should be installed and operated within the specified environmental and mechanical conditions.

Particular attention should be paid to:

• Motor bearings.
• Shaft alignment.
• Coupling condition.
• Cable condition.
• Connector condition.
• Brake operation.
• Encoder feedback.
• Motor temperature.
• Mechanical vibration.
• Radial and axial shaft loading.

The brake should be checked periodically when it is part of a machine’s holding function.

The encoder and motor cables should also be protected against excessive bending, mechanical damage and interference.

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26. Recommended Related Models by Application

Application Requirement	Recommended Model	Reason
High speed without brake	MPL-B4530K-HK72AA	Similar 4000 rpm configuration without holding brake
High speed with brake	MPL-B4530K-HK74AA	Integrated 24 V DC brake
High-resolution multi-turn feedback	MPL-B4530K-MK74AA	Multi-turn feedback configuration
Resolver-based control	MPL-B4530K-RK74AA	Resolver feedback configuration
Lower speed / different motion profile	MPL-B4530F-HK74AA	3000 rpm configuration with same general frame and stack

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27. Overall Advantages Summary

Advantage	Description
4000 rpm speed	Suitable for high-speed automation
Low inertia	Supports rapid acceleration and deceleration
8.25 N·m torque class	Suitable for substantial industrial motion loads
24 V DC brake	Provides a holding function
2000-line encoder	Supports closed-loop servo control
Keyless shaft	Flexible mechanical coupling
130 mm frame	Compact industrial servo package
76.2 mm stack	Suitable for the B4530K performance class
Right-angle connector	Convenient cable routing
180° connector rotation	Flexible installation
IEC metric mounting	Convenient industrial mechanical integration
9.5 kg weight	Reflects the brake-equipped configuration

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28. Quick Technical Reference

Specification	Value
Model	MPL-B4530K-HK74AA
Brand	Allen-Bradley
Product Series	MP-Series MPL
Product Type	Low-inertia AC rotary servo motor
Voltage	460 V AC class
Voltage Category	480 V class
Rated Speed	4000 rpm
Rated Torque	Approx. 8.25 N·m
Frame Size	130 mm
Frame Designation	45
Stack Length	76.2 mm
Stack Designation	30
Feedback	2000-line incremental encoder
Shaft	Keyless
Brake	24 V DC
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Mounting Holes	Free mounting holes, Type FF
Weight	9.5 kg
Motor Construction	Low-inertia brushless servo
Main Application	Industrial motion control
Typical Machines	Packaging, assembly, material handling, printing, converting, positioning and vertical-axis equipment

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29. Final Product Assessment

The MPL-B4530K-HK74AA is a high-performance industrial servo motor designed for applications where fast motion, closed-loop feedback and mechanical holding capability are important.

Its most important specifications are the 460 V-class electrical rating, 4000 rpm speed, approximately 8.25 N·m torque, 130 mm frame, 76.2 mm stack, 2000-line incremental encoder, keyless shaft and 24 V DC holding brake.

The integrated brake is the feature that makes this configuration particularly attractive for vertical axes and other applications where the machine needs to maintain a stationary load.

The low-inertia design supports fast acceleration and deceleration, while the incremental encoder allows the servo drive to regulate movement accurately.

The right-angle SpeedTEC DIN connector and 180° rotation capability also make the motor easier to integrate into compact industrial machinery.

For a direct comparison, the MPL-B4530K-HK72AA is the natural no-brake counterpart, while the MPL-B4530K-MK74AA and MPL-B4530K-RK74AA provide alternative feedback technologies.

For applications where a 24 V DC holding brake is required and the machine operates around the 4000 rpm speed class, the MPL-B4530K-HK74AA is a particularly suitable configuration within the MPL motor family.

When replacing an existing motor, however, the complete model number should be matched. Frame size alone is not sufficient because feedback, shaft, brake, connector and mechanical configurations can differ between otherwise similar motors.