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MPL-B4530F-HJ74AA Low-Inertia Servo Motor

1. Product Overview

The MPL-B4530F-HJ74AA is a high-performance low-inertia brushless AC servo motor designed for industrial motion-control applications that require accurate positioning, controlled acceleration, high dynamic response, and dependable continuous operation.

This model belongs to the MP-Series MPL Low-Inertia Servo Motor family and uses a 460 V AC class electrical configuration. It has a 130 mm frame size, a 76.2 mm magnetic stack, and a 3000 rpm rated speed.

Compared with smaller 115 mm-frame MPL motors, the MPL-B4530F-HJ74AA provides a larger mechanical platform and a higher torque class. Its published motor data places it at approximately 8.25 N·m continuous stall torque, approximately 20.3 N·m peak torque, and approximately 2.1 kW continuous power.

The motor uses a 2000-line-per-revolution incremental encoder, a keyed shaft extension, and an integral 24 V DC holding brake. It also uses a right-angle circular SpeedTEC DIN connector, making it suitable for industrial machines where controlled cable routing and compact motor installation are important.

The HJ74AA configuration is particularly useful when the machine requires a combination of relatively high torque, low-inertia servo response, keyed mechanical coupling, incremental feedback, and an integrated holding brake.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Servo Motor Series	MPL Low-Inertia Servo Motors
Product Type	Brushless AC Rotary Servo Motor
Model	MPL-B4530F-HJ74AA
Motor Configuration	Low-Inertia Servo
Voltage Class	400 V AC class
Armature Voltage	460 V AC
Rated Speed	3000 rpm
Frame Size	130 mm
Magnetic Stack Length	76.2 mm
Feedback Type	Incremental Encoder
Encoder Resolution	2000 lines/revolution
Shaft Configuration	Keyed Shaft
Shaft Seal	No
Brake	24 V DC Holding Brake
Connector	Circular SpeedTEC DIN
Connector Style	Right Angle
Mounting	IEC Metric
Motor Category	Industrial Servo Motor

The MPL-B4530F-HJ74AA is therefore best described as a 130 mm-frame, 3000 rpm, low-inertia MPL servo motor with incremental feedback, keyed shaft, and integral 24 V DC holding brake.

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3. Main Technical Specifications

Parameter	MPL-B4530F-HJ74AA Specification
Model	MPL-B4530F-HJ74AA
Motor Type	Brushless AC Rotary Servo Motor
Series	MPL Low-Inertia
Product Family	MP-Series
Voltage Class	400 V AC
Armature Voltage	460 V AC
Rated Speed	3000 rpm
Maximum Speed Class	3000 rpm
Rated Continuous Power	Approx. 2.1 kW
Continuous Stall Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Frame Size	130 mm
Frame Dimension Class	5.12 in
Magnetic Stack Length	76.2 mm
Magnetic Stack	3.0 in
Feedback	Incremental Encoder
Encoder Resolution	2000 lines/revolution
Feedback Type	Incremental
Shaft	Keyed Shaft Extension
Shaft Key	Yes
Shaft Seal	No
Brake	24 V DC Holding Brake
Connector	Circular SpeedTEC DIN
Connector Configuration	Right Angle
Mounting	IEC Metric
Rotor Inertia	Approx. 0.00040 kg·m²
Approximate Motor Weight	7.3 kg
Typical Application	Industrial Servo Motion Control
Main Performance Characteristic	Low inertia / high dynamic response

The motor data for the MPL-B4530F family identifies the 3000 rpm speed class, 8.25 N·m continuous torque, 20.3 N·m peak torque, approximately 2.1 kW output, approximately 0.00040 kg·m² rotor inertia, and approximately 7.3 kg motor weight.

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4. Dimensions and Weight

The MPL-B4530F-HJ74AA is built on a 130 mm frame with a 76.2 mm magnetic stack.

Mechanical Parameter	Specification
Model	MPL-B4530F-HJ74AA
Frame Size	130 mm
Frame Size in Inches	Approx. 5.12 in
Magnetic Stack Length	76.2 mm
Magnetic Stack Length	3.0 in
Mounting Standard	IEC Metric
Shaft Type	Keyed
Shaft Seal	No
Integral Brake	Yes
Brake Voltage	24 V DC
Connector	Circular SpeedTEC DIN
Connector Style	Right Angle
Approximate Motor Weight	7.3 kg
Approximate Weight in Pounds	Approx. 16 lb

The approximately 7.3 kg figure is a useful reference for machine design, equipment transportation, mounting calculations, and product comparison. Actual packaged shipping weight can be higher.

For a physical replacement or new machine design, the complete dimensional drawing should be used to confirm flange dimensions, overall motor length, shaft diameter, shaft extension, mounting-hole spacing, connector clearance, and cable-bending requirements.

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5. Model Number Configuration

The complete catalog number is:

MPL-B4530F-HJ74AA

The model code identifies a particular combination of motor family, voltage class, frame/output configuration, speed, feedback, shaft, connector, brake, and product revision.

Code Section	General Configuration
MPL	MPL Low-Inertia Servo Motor family
B	460 V AC class
45	130 mm frame class
30	76.2 mm / 3.0 in magnetic stack
F	3000 rpm motor configuration
H	Incremental encoder configuration
J	Keyed shaft configuration
7	Right-angle SpeedTEC DIN connector configuration
4	24 V DC brake configuration
AA	Standard catalog/revision designation

The HJ74AA portion is especially important because it distinguishes this motor from other 4530F configurations.

The HJ74AA configuration uses an incremental encoder, a keyed shaft, and a 24 V DC holding brake. Related MPL-B4530F models can instead use multi-turn absolute feedback, single-turn feedback, resolver feedback, or different shaft configurations.

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6. Product Introduction

The MPL-B4530F-HJ74AA is designed for industrial machinery where a conventional induction motor or general-purpose motor cannot provide the required positioning accuracy and dynamic response.

Servo motors are typically used when the machine needs controlled speed, controlled torque, repeatable positioning, and rapid changes in motion.

The low-inertia design of the MPL family is particularly useful for applications that repeatedly accelerate, decelerate, reverse, and reposition.

The 3000 rpm rating provides a practical balance between speed and torque. Rather than focusing exclusively on maximum rotational speed, this configuration provides a stronger torque-oriented platform than smaller high-speed MPL models.

The motor’s approximately 8.25 N·m continuous torque gives it a useful continuous mechanical output level, while the approximately 20.3 N·m peak torque provides additional short-duration torque for acceleration and transient load conditions.

The integrated 24 V DC holding brake is another important feature. It can be especially useful in vertical or load-holding applications where the motor needs to maintain a mechanical position when servo torque is removed.

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7. Low-Inertia Servo Performance

Low rotor inertia is one of the main characteristics of the MPL product family.

The rotor inertia of the MPL-B4530F configuration is approximately 0.00040 kg·m².

Performance Parameter	Specification
Model	MPL-B4530F-HJ74AA
Rotor Inertia	Approx. 0.00040 kg·m²
Continuous Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Rated Speed	3000 rpm
Continuous Power	Approx. 2.1 kW

A low-inertia motor can respond quickly to changes in command speed.

This is useful for machine axes that must perform repeated motion cycles, particularly where the acceleration and deceleration periods represent a significant part of the total machine cycle.

Typical examples include indexing mechanisms, automated feeders, packaging equipment, assembly machinery, cutting systems, and coordinated motion axes.

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8. 3000 rpm Operating Speed

The MPL-B4530F-HJ74AA has a 3000 rpm rated speed.

Compared with 5000 rpm MPL configurations, the 3000 rpm configuration places more emphasis on torque and general-purpose industrial motion rather than extremely high rotational speed.

Speed Parameter	Specification
Model	MPL-B4530F-HJ74AA
Rated Speed	3000 rpm
Motor Speed Class	3000 rpm
Magnetic Stack	76.2 mm
Frame	130 mm
Main Characteristic	Balanced speed and torque

This makes the motor suitable for applications where the load does not require extremely high motor speed but still needs fast and controlled acceleration.

When a gearbox, belt drive, ball screw, roller, or other transmission system is used, the 3000 rpm motor speed can be converted into the appropriate load speed and torque.

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9. Torque Characteristics

The motor provides approximately 8.25 N·m continuous stall torque and approximately 20.3 N·m peak torque.

Torque Parameter	Value
Model	MPL-B4530F-HJ74AA
Continuous Stall Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Continuous Power	Approx. 2.1 kW
Rated Speed	3000 rpm
Peak-to-Continuous Torque Ratio	Approx. 2.46:1

The continuous torque rating is important for determining whether the motor can carry the load during normal operation.

The peak torque rating is more relevant during short-duration events such as:

• Acceleration
• Deceleration
• Rapid indexing
• Direction reversal
• Transient load increases
• Mechanical disturbance compensation

The actual torque duty cycle should always be evaluated before final motor selection.

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10. Incremental Encoder

The MPL-B4530F-HJ74AA uses a 2000-line-per-revolution incremental encoder.

Feedback Parameter	Specification
Model	MPL-B4530F-HJ74AA
Feedback Type	Incremental Encoder
Encoder Resolution	2000 lines/revolution
Feedback Category	Incremental
Primary Function	Speed and position feedback
Typical Use	Servo positioning and motion control

An incremental encoder is a well-established feedback technology for industrial servo systems.

It provides feedback that allows the motion controller and servo drive to determine motor speed and relative position.

This configuration can be suitable for:

• Servo positioning
• Speed control
• Electronic gearing
• Indexing
• Coordinated motion
• Conveyor synchronization
• Feed systems
• Automated machinery

The incremental feedback configuration is different from the absolute multi-turn feedback used by some other MPL models.

For replacement applications, this distinction is extremely important. A motor with a similar frame and torque rating may still be unsuitable if the existing control system expects a different feedback type.

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11. Keyed Shaft Configuration

The MPL-B4530F-HJ74AA uses a keyed shaft extension.

Mechanical Feature	Specification
Model	MPL-B4530F-HJ74AA
Shaft Type	Keyed
Shaft Key	Yes
Shaft Seal	No
Coupling Type	Compatible keyed coupling
Mechanical Advantage	Positive torque transmission through shaft/key arrangement

A keyed shaft is a familiar mechanical interface for industrial equipment.

It is particularly useful when the machine uses a keyed coupling, pulley, gear, sprocket, or other torque-transmission component designed for a keyed shaft.

When replacing an existing motor, the shaft diameter, shaft length, key dimensions, mounting flange, and coupling arrangement should all be checked rather than assuming compatibility from the frame size alone.

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12. Integral 24 V DC Holding Brake

The MPL-B4530F-HJ74AA includes a 24 V DC holding brake.

Brake Parameter	Specification
Model	MPL-B4530F-HJ74AA
Brake	Integral
Brake Type	Holding Brake
Brake Voltage	24 V DC
Main Function	Load holding
Vertical Axis Suitability	Suitable for consideration
Brake Control	Application-specific

The holding brake is particularly useful when the motor must remain mechanically held after servo torque is removed.

Potential applications include:

• Vertical lifting axes
• Z-axis systems
• Elevating mechanisms
• Vertical assembly systems
• Load positioning
• Automated lifting equipment
• Gravity-loaded mechanisms

The brake should normally be used as a holding device rather than as the primary method of repeatedly stopping a moving load.

For safety-critical applications, the complete machine safety system should determine the required braking and load-holding strategy.

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13. Connector Configuration

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

Connector Parameter	Specification
Model	MPL-B4530F-HJ74AA
Connector Type	Circular SpeedTEC DIN
Configuration	Right Angle
Main Function	Motor/feedback connection
Installation Benefit	Compact cable routing
Application	Industrial servo systems

The right-angle connector is useful where the motor is installed close to machine frames or other components.

Proper connector clearance should be considered when designing the motor mounting area.

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14. Mounting and Mechanical Integration

The motor uses a 130 mm frame and a 76.2 mm magnetic stack.

Mounting Parameter	Specification
Model	MPL-B4530F-HJ74AA
Frame Size	130 mm
Frame Size Class	5.12 in
Stack Length	76.2 mm
Stack Length Class	3.0 in
Mounting Type	Flange Mount
Mounting Standard	IEC Metric
Shaft	Keyed
Brake	Integral 24 V DC
Connector	Right Angle

The larger 130 mm frame makes this motor physically larger than the 115 mm MPL-B430P family.

This additional frame size can provide a useful mechanical platform for higher continuous torque applications while still maintaining a relatively compact industrial servo package.

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15. Applications

15.1 Packaging Machinery

The MPL-B4530F-HJ74AA can be used in packaging machinery requiring controlled servo movement.

Typical applications include:

• Cartoning
• Case packing
• Bagging
• Wrapping
• Sealing
• Filling
• Product positioning
• Packaging indexing
• Material feeding
• Conveyor synchronization

The low-inertia characteristics can help the machine respond quickly during repeated motion cycles.

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15.2 Material Handling

Material-handling equipment often requires accurate positioning and controlled acceleration.

Potential applications include:

• Automated conveyors
• Transfer units
• Sorting systems
• Indexing mechanisms
• Roller drives
• Positioning stations
• Automated transfer equipment
• Material feeding systems

The 3000 rpm speed class is suitable for applications where the machine requires controlled movement without necessarily needing extremely high motor speed.

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15.3 Assembly Automation

Assembly machinery often contains multiple servo-controlled axes.

The MPL-B4530F-HJ74AA can be considered for:

• Component positioning
• Assembly indexing
• Press positioning
• Part insertion
• Automated feeding
• Pick-and-place mechanisms
• Rotary indexing tables
• Inspection positioning

The holding brake can also be advantageous on selected vertical assembly axes.

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15.4 Printing and Converting

The motor can be considered for selected printing and converting applications involving controlled material movement.

Potential uses include:

• Roll positioning
• Feeding
• Web handling
• Slitting
• Rewinding
• Unwinding
• Registration mechanisms
• Material positioning

The actual motor selection depends on the web tension, roller diameter, required speed, acceleration, and mechanical transmission.

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15.5 Machine Tools

The motor can be used for selected machine-tool motion applications where the 3000 rpm speed and approximately 8.25 N·m continuous torque are appropriate.

Potential uses include:

• Auxiliary axes
• Feed systems
• Rotary positioning
• Automated tool positioning
• Indexing systems
• Machine auxiliary mechanisms

The exact selection should be based on load inertia, acceleration requirements, duty cycle, and mechanical transmission.

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15.6 Vertical Motion

The integrated 24 V DC holding brake makes this configuration particularly attractive for certain vertical motion applications.

Examples include:

• Z-axis mechanisms
• Vertical positioning
• Lifting systems
• Elevating platforms
• Vertical assembly
• Gravity-loaded axes

The brake provides a holding function when correctly controlled by the overall servo system.

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16. Product Advantages

16.1 Strong Continuous Torque

The approximately 8.25 N·m continuous torque rating gives the motor a useful continuous output level for industrial machinery.

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16.2 High Peak Torque

The approximately 20.3 N·m peak torque capability provides additional dynamic capacity during acceleration and short-duration load changes.

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16.3 Low-Inertia Response

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

This can improve the dynamic behavior of machines that frequently accelerate, decelerate, or reverse.

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16.4 3000 rpm Speed

The 3000 rpm rating provides a practical balance between motor speed and torque.

This makes the motor suitable for many general industrial motion applications.

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16.5 130 mm Frame

The 130 mm frame provides a larger mechanical platform than the 115 mm-frame MPL-B430P family.

This can be beneficial when the machine requires more torque capability without moving into a much larger motor category.

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16.6 Integral Holding Brake

The 24 V DC holding brake is a major advantage for vertical and load-holding applications.

It can simplify machine design where an integrated motor brake is preferred.

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16.7 Keyed Shaft

The keyed shaft provides a familiar and robust mechanical connection for compatible couplings and transmission components.

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16.8 Incremental Feedback

The 2000-line incremental encoder provides established servo feedback for speed and position control.

It can be a practical choice for systems where absolute multi-turn feedback is not required.

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16.9 Industrial Connector

The right-angle SpeedTEC DIN connector supports compact machine installation and practical cable routing.

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17. Recommended Same-Series or Closely Related Models

The following models are useful comparison choices from the same MPL family.

Model	Series	Frame	Stack	Speed	Continuous Torque	Peak Torque	Feedback	Shaft	Brake
MPL-B4530F-HJ72AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Incremental, 2000 lines/rev	Keyed	No brake
MPL-B4530F-HK74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Incremental	Keyless	24 V DC
MPL-B4530F-MJ74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Multi-turn high-resolution	Keyed	24 V DC
MPL-B4530F-MK74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Multi-turn high-resolution	Keyless	24 V DC
MPL-B4530F-SJ74AA	MPL Low-Inertia	130 mm	76.2 mm	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Single-turn high-resolution	Keyed	24 V DC

These models share the same general MPL-B4530F 130 mm / 76.2 mm / 3000 rpm platform, but differ in feedback, shaft, and brake configurations. The MPL family catalog includes these H, M, and S feedback variants as well as keyed and keyless shaft options.

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18. Comparison of the Most Relevant 4530F Variants

Feature	MPL-B4530F-HJ74AA	MPL-B4530F-HK74AA	MPL-B4530F-MJ74AA	MPL-B4530F-MK74AA
Frame	130 mm	130 mm	130 mm	130 mm
Stack	76.2 mm	76.2 mm	76.2 mm	76.2 mm
Rated Speed	3000 rpm	3000 rpm	3000 rpm	3000 rpm
Continuous Torque	Approx. 8.25 N·m	Approx. 8.25 N·m	Approx. 8.25 N·m	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m	Approx. 20.3 N·m	Approx. 20.3 N·m	Approx. 20.3 N·m
Feedback	Incremental	Incremental	Multi-turn absolute	Multi-turn absolute
Encoder Resolution	2000 lines/rev	2000 lines/rev class	High-resolution	High-resolution
Shaft	Keyed	Keyless	Keyed	Keyless
Brake	24 V DC	24 V DC	24 V DC	24 V DC
Main Advantage	Keyed + incremental	Keyless + incremental	Keyed + absolute	Keyless + absolute

The MPL-B4530F-HJ74AA is therefore the logical choice when the machine specifically requires an incremental encoder and keyed shaft together with an integral brake.

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19. Five Popular Models from the Same Brand

The following models are useful broader comparison products within the same industrial servo product range.

Model	Product Family	Voltage Class	Speed	Frame / Stack	Continuous Torque Class	Feedback	Shaft	Brake
MPL-B430P-MK74AA	MP-Series MPL	460 V AC	5000 rpm	115 mm / 76.2 mm	Approx. 6.55 N·m	Multi-turn absolute	Keyless	24 V DC
MPL-B430P-MK72AA	MP-Series MPL	460 V AC	5000 rpm	115 mm / 76.2 mm	Approx. 6.55 N·m	Multi-turn absolute	Keyless	No brake
MPL-B4530F-MK74AA	MP-Series MPL	460 V AC	3000 rpm	130 mm / 76.2 mm	Approx. 8.25 N·m	Multi-turn absolute	Keyless	24 V DC
MPL-B4530K-MK74AA	MP-Series MPL	460 V AC	4000 rpm	130 mm / 76.2 mm	Approx. 8.25 N·m	Multi-turn absolute	Keyless	24 V DC
MPL-B4540F-MJ74AA	MP-Series MPL	460 V AC	3000 rpm	130 mm / 101.6 mm	Approx. 10.2 N·m	Multi-turn absolute	Keyed	24 V DC

The broader MPL catalog includes 3000 rpm and 4000 rpm 130 mm-frame configurations, as well as larger stack-length motors for applications requiring increased torque.

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20. Technical Comparison with Smaller MPL Motors

Parameter	MPL-B4530F-HJ74AA	MPL-B430P-MK74AA	MPL-B420P-MK74AA
Frame	130 mm	115 mm	115 mm
Stack	76.2 mm	76.2 mm	50.8 mm
Rated Speed	3000 rpm	5000 rpm	5000 rpm
Continuous Torque	Approx. 8.25 N·m	Approx. 6.55 N·m	Approx. 4.74 N·m
Peak Torque	Approx. 20.3 N·m	Approx. 19.8 N·m	Approx. 13.5 N·m
Continuous Power	Approx. 2.1 kW	Approx. 2.2 kW	Approx. 1.9 kW
Feedback	Incremental	Multi-turn absolute	Multi-turn absolute
Shaft	Keyed	Keyless	Keyless
Brake	24 V DC	24 V DC	24 V DC configuration
Approx. Weight	7.3 kg	Approx. 8 kg class	Approx. 6 kg class
Main Characteristic	Higher torque / 3000 rpm	High-speed / compact	Compact high-speed

This comparison shows why the MPL-B4530F-HJ74AA should not simply be considered a larger version of a 5000 rpm motor.

Its 3000 rpm speed class and 8.25 N·m continuous torque provide a different balance of speed, torque, and mechanical size.

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21. Typical Machine Functions

Machine Function	Suitability	Main Benefit
Packaging Indexing	Excellent	Fast and repeatable positioning
Conveyor Synchronization	Excellent	Controlled speed and position
Material Feeding	Excellent	Stable servo-controlled motion
Assembly Positioning	Excellent	Accurate movement
Vertical Positioning	Very Good	Integral holding brake
Rotary Indexing	Excellent	Precise feedback
Printing Feed	Very Good	Controlled synchronized movement
Converting Equipment	Very Good	Servo-controlled material handling
Machine Tool Auxiliary Axis	Very Good	Balanced speed and torque
Automated Inspection	Very Good	Repeatable positioning
Lifting Mechanism	Very Good	Holding brake
Pick-and-Place	Very Good	Dynamic response
Electronic Gearing	Very Good	Servo feedback
Electronic Camming	Very Good	Coordinated motion

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22. Important Selection Considerations

Load Torque

The continuous load torque should be calculated based on the actual machine operating conditions.

The approximately 8.25 N·m continuous torque capability should not be treated as the only selection criterion.

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Acceleration

Acceleration torque can be substantially higher than steady-state load torque.

For high-cycle machines, the acceleration and deceleration profile should be evaluated carefully.

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Load Inertia

The reflected load inertia is important when determining servo response.

The low-inertia characteristics of the motor can be advantageous, but the complete motor-load inertia relationship still needs to be checked.

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Speed

The 3000 rpm rating should be compared with the required machine speed.

If a mechanical transmission is used, the gear ratio should be included in the calculation.

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Feedback Compatibility

This model uses a 2000-line incremental encoder.

This is one of the most important factors when replacing another servo motor.

A machine controller and drive configured for absolute feedback may not be directly compatible with an incremental-feedback motor without appropriate system changes.

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Shaft Compatibility

The HJ74AA model uses a keyed shaft.

The coupling, pulley, gear, shaft diameter, shaft length, and key arrangement should be checked before installation.

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Brake Requirements

The integrated 24 V DC holding brake can be particularly valuable for vertical applications.

However, the brake should be evaluated as part of the complete machine safety and load-holding system.

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Environmental Conditions

The motor should be installed in an environment appropriate for its enclosure and shaft configuration.

Particular attention should be paid to:

• Dust
• Moisture
• Oil
• Coolant
• Excessive vibration
• Ambient temperature
• Chemical exposure
• Cable routing
• Shaft contamination

The model uses a shaft configuration without a shaft seal, so environmental protection around the shaft area deserves particular attention.

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23. Product Advantages at a Glance

Advantage	Description
130 mm Frame	Larger mechanical platform for industrial servo applications
76.2 mm Stack	3.0 in magnetic stack
3000 rpm	Balanced speed and torque performance
8.25 N·m Continuous Torque	Strong continuous mechanical output
20.3 N·m Peak Torque	Useful dynamic acceleration capability
Low Inertia	Fast response to motion commands
Incremental Feedback	Established servo feedback technology
2000 Lines/Rev	High-resolution incremental position feedback
Keyed Shaft	Familiar industrial mechanical interface
24 V DC Brake	Useful for load-holding applications
Right-Angle Connector	Convenient cable routing
Industrial Construction	Suitable for automated production machinery
Flexible Applications	Packaging, assembly, material handling, indexing and more

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24. Final Technical Summary

Item	Specification
Model	MPL-B4530F-HJ74AA
Brand	Allen-Bradley
Product Family	MP-Series
Series	MPL Low-Inertia Servo Motors
Motor Type	Brushless AC Rotary Servo Motor
Voltage Class	400 V AC
Armature Voltage	460 V AC
Rated Speed	3000 rpm
Continuous Power	Approx. 2.1 kW
Continuous Stall Torque	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m
Frame Size	130 mm
Frame Size Class	5.12 in
Magnetic Stack	76.2 mm
Magnetic Stack	3.0 in
Feedback	Incremental Encoder
Encoder Resolution	2000 lines/revolution
Shaft	Keyed
Shaft Seal	No
Brake	24 V DC Holding Brake
Connector	Circular SpeedTEC DIN
Connector Style	Right Angle
Mounting	IEC Metric
Rotor Inertia	Approx. 0.00040 kg·m²
Approximate Weight	7.3 kg
Main Application	Industrial Motion Control
Typical Equipment	Packaging, Assembly, Material Handling, Printing, Converting, Indexing, Machine Tools
Main Performance Characteristic	Low-inertia, torque-oriented 3000 rpm servo motor

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25. Conclusion

The MPL-B4530F-HJ74AA is a robust industrial low-inertia servo motor designed for applications where controlled motion, reliable torque output, accurate feedback, and mechanical holding capability are important.

Its 130 mm frame, 76.2 mm magnetic stack, 3000 rpm speed, approximately 8.25 N·m continuous torque, and approximately 20.3 N·m peak torque give the motor a useful balance between mechanical size and servo performance.

The motor’s 2000-line incremental encoder provides a proven feedback solution for servo positioning and speed control. This makes it suitable for many automated machines where absolute multi-turn position information is not required.

The keyed shaft is another practical feature for industrial machinery. It provides a familiar mechanical interface for compatible couplings, gears, pulleys, and other transmission components.

The integral 24 V DC holding brake is especially useful for applications where the motor must hold a load after the servo is disabled. Vertical positioning systems, lifting mechanisms, Z-axis applications, and gravity-loaded equipment can benefit from this configuration.

The right-angle SpeedTEC DIN connector also helps with compact machine integration and cable routing.

Overall, the MPL-B4530F-HJ74AA is best suited to industrial machines that need a relatively high-torque, low-inertia servo motor in the 3000 rpm class, particularly where a keyed shaft, incremental encoder, and 24 V DC holding brake are required.

One important consideration is product lifecycle: this exact model has been listed as discontinued, with an engineering replacement identified in the same general product family. For retrofit or replacement projects, the existing drive, feedback interface, shaft arrangement, brake requirements, mounting dimensions, and motor performance should all be checked before selecting an alternative.