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Allen-Bradley MPL-B330P-MJ72AA Servo Motor

1. Product Overview

The MPL-B330P-MJ72AA is a low-inertia brushless permanent-magnet AC rotary servo motor from the MP-Series MPL family.

It is designed for industrial motion-control systems that require accurate positioning, high rotational speed, rapid acceleration and deceleration, repeatable indexing, and stable closed-loop operation.

The motor is rated for 5000 rpm and provides approximately 4.18 N·m of continuous torque with approximately 1.8 kW of continuous rated power.

The motor uses a 100 mm frame size and a 76.2 mm magnetic stack length, giving it a compact mechanical format relative to its speed and torque capability.

The MPL-B330P-MJ72AA uses a multi-turn high-resolution absolute encoder for motor feedback. The encoder provides position information to the servo control system and allows the motor to operate as part of a closed-loop positioning system.

The motor has a keyed shaft extension, a right-angle SpeedTEC DIN connector that can be rotated through 180 degrees, and no integral holding brake.

Its mechanical mounting arrangement uses IEC metric mounting with free mounting holes, making it suitable for a broad range of industrial machine structures.

The motor is primarily intended for dynamic motion rather than simple constant-speed operation. It is therefore well suited to machines that repeatedly accelerate, decelerate, stop, reverse, index, and reposition.

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2. Brand and Product Classification

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B330P-MJ72AA
Product Type	Rotary Servo Motor
Motor Technology	Brushless Permanent-Magnet AC Servo
Voltage Class	400 V AC
Armature Voltage	460 V
Rated Speed	5000 rpm
Continuous Rated Power	Approximately 1.8 kW
Continuous Torque	Approximately 4.18 N·m
Peak Torque	Approximately 11.1 N·m
Frame Size	100 mm
Magnetic Stack Length	76.2 mm / 3.0 in
Feedback	Multi-turn High-Resolution Absolute Encoder
Shaft	Keyed Shaft Extension
Brake	No Integral Brake
Connector	SpeedTEC DIN
Connector Style	Right Angle, 180° Rotatable
Mounting	IEC Metric
Mounting Holes	Free Mounting Holes, Type FF
Shaft Seal	No Shaft Seal
Rotor Design	Low Inertia

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3. Detailed Technical Parameters

Parameter	MPL-B330P-MJ72AA
Model	MPL-B330P-MJ72AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo
Motor Type	Brushless Permanent-Magnet AC Servo Motor
Voltage Class	400 V AC
Armature Voltage	460 V
Rated Speed	5000 rpm
Maximum Speed	5000 rpm
Continuous Rated Power	Approximately 1.8 kW
Continuous Stall Torque	Approximately 4.18 N·m
Peak Stall Torque	Approximately 11.1 N·m
Rotor Inertia	Approximately 0.00012 kg·m²
Feedback	Multi-turn Absolute Encoder
Encoder Resolution	1024 sin/cos cycles per revolution
Feedback Protocol	Hiperface-type feedback
Shaft Configuration	Keyed Shaft Extension
Shaft Seal	No Shaft Seal
Integral Brake	No
Connector	SpeedTEC DIN
Connector Orientation	Right Angle
Connector Rotation	180° Rotatable
Frame Size	100 mm
Frame Classification	Frame 3
Magnetic Stack	76.2 mm
Magnetic Stack	3.0 in
Mounting	IEC Metric Flange
Mounting Holes	Type FF, Free Mounting Holes
Approximate Weight	Approximately 4.82 kg
Overall Envelope	Configuration-dependent; verify mechanical drawing
Motor Construction	Low-Inertia Brushless
Intended Control	Closed-Loop Servo Control

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4. Dimensions and Weight

The MPL-B330P-MJ72AA uses a 100 mm frame with a 76.2 mm magnetic stack.

The 100 mm frame dimension is one of the most important mechanical characteristics when determining whether the motor can fit an existing machine.

The magnetic stack is 76.2 mm, or 3.0 inches.

The motor’s complete envelope also includes the front mounting flange, keyed shaft extension, rear housing, and connector assembly. The exact overall motor length should therefore be checked against the applicable mechanical drawing before installation or replacement.

The approximate product weight is 4.82 kg.

Mechanical Parameter	Specification
Model	MPL-B330P-MJ72AA
Frame Size	100 mm
Frame Classification	Frame 3
Frame Width Class	100 mm / 3.94 in
Magnetic Stack Length	76.2 mm
Magnetic Stack Length	3.0 in
Mounting Standard	IEC Metric
Mounting Hole Type	Type FF
Shaft Type	Keyed
Shaft Seal	None
Connector Position	Right-angle connector arrangement
Connector Rotation	180°
Approximate Weight	4.82 kg
Overall Length	Configuration-dependent
Shaft Diameter	Verify mechanical drawing
Shaft Extension	Keyed configuration; verify detailed drawing
Flange Dimensions	100 mm frame class; verify detailed mounting drawing

For replacement applications, the 100 mm frame alone should not be treated as proof of interchangeability. The shaft, encoder, connector, stack length, brake configuration, and drive compatibility must also match.

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5. Electrical Characteristics

The MPL-B330P-MJ72AA is a 400 V-class servo motor intended for use with compatible high-voltage servo-drive systems.

Its armature voltage is specified at approximately 460 V.

Unlike a conventional induction motor, this servo motor is intended to operate through a servo amplifier or compatible motion-control drive.

The drive regulates motor current and uses encoder feedback to control torque, velocity, and position.

Electrical Parameter	Specification
Model	MPL-B330P-MJ72AA
Voltage Class	400 V AC
Armature Voltage	460 V
Motor Type	Permanent-Magnet AC Servo
Rated Power	Approx. 1.8 kW
Rated Speed	5000 rpm
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Feedback	Multi-turn absolute encoder
Brake	No integral brake
Control	Closed-loop servo
Rotor Type	Low inertia

The actual current drawn by the motor depends on operating torque, acceleration, load, duty cycle, and servo-drive configuration.

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6. Torque and Speed Performance

The MPL-B330P-MJ72AA combines a 5000 rpm rated speed with approximately 4.18 N·m continuous torque.

Its peak torque capability is approximately 11.1 N·m, allowing the motor to handle short-duration acceleration and dynamic load requirements when operated within the appropriate servo-drive and thermal limits.

This combination makes the motor suitable for machines where rapid movement is required without moving to a substantially larger motor frame.

Performance Parameter	Value
Model	MPL-B330P-MJ72AA
Rated Speed	5000 rpm
Maximum Speed	5000 rpm
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Power	Approx. 1.8 kW
Rotor Inertia	Approx. 0.00012 kg·m²
Dynamic Response	High
Motion Type	Position, velocity and torque control
Application Class	High-cycle industrial automation

The peak torque figure should not be treated as a continuous operating torque. Peak torque is normally associated with acceleration, deceleration, transient load conditions, or short-duration motion requirements.

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7. Low-Inertia Rotor Design

The MPL-B330P-MJ72AA belongs to the MPL low-inertia motor family.

Low rotor inertia is especially valuable in applications with frequent changes in speed.

When the motor has relatively low rotating inertia, less torque is required to accelerate the rotor itself. More of the available motor torque can therefore be used to accelerate the external machine load.

This is useful for indexing systems, pick-and-place equipment, packaging machines, high-speed assembly equipment, and other machines that perform repetitive movements.

The approximately 0.00012 kg·m² rotor inertia places this motor within the low-inertia performance category of the MPL family.

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8. Encoder and Feedback System

The MPL-B330P-MJ72AA uses a multi-turn high-resolution absolute encoder.

The encoder is an important part of the servo system because it provides feedback about the actual motor position.

The multi-turn function allows the feedback system to track motor movement across multiple revolutions.

The encoder uses high-resolution sinusoidal feedback and is associated with a Hiperface-type communication protocol.

Feedback Parameter	Specification
Model	MPL-B330P-MJ72AA
Feedback Type	Absolute Multi-turn
Encoder Class	High Resolution
Encoder Resolution	1024 sin/cos cycles/revolution
Feedback Protocol	Hiperface-type
Position Feedback	Yes
Speed Feedback	Yes
Closed-Loop Operation	Yes
Primary Function	Position and velocity feedback

This feedback arrangement makes the motor suitable for applications where accurate position control and repeatability are important.

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9. Shaft Configuration

The MPL-B330P-MJ72AA has a keyed shaft extension.

The keyed shaft provides a mechanical interface for compatible couplings, pulleys, gearboxes, sprockets, and other transmission components.

The shaft configuration should be matched carefully when replacing an existing motor.

A mechanically similar motor with a different shaft configuration may require a different coupling or mechanical adapter.

The motor does not include a shaft seal. For machinery exposed to dust, oil, coolant, moisture, or washdown conditions, the complete machine sealing arrangement should therefore be evaluated.

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10. Connector Configuration

The MPL-B330P-MJ72AA uses a SpeedTEC DIN connector in a right-angle configuration.

The connector can be rotated through approximately 180 degrees.

This feature is useful when the motor is installed in a confined machine enclosure.

Instead of requiring a fixed cable direction, the connector can be positioned to better suit the machine’s cable routing arrangement.

Connector Parameter	Specification
Model	MPL-B330P-MJ72AA
Connector Type	SpeedTEC DIN
Connector Configuration	Right Angle
Connector Rotation	180°
Connection Type	Quick Connect
Cable Routing	Flexible orientation
Installation Benefit	Easier cable routing in confined spaces
Maintenance Consideration	Connector should remain clean and securely locked

The connector should not be subjected to excessive cable pulling force or sharp cable bends.

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11. Brake Configuration

The MPL-B330P-MJ72AA is supplied without an integral brake.

This is an important characteristic when selecting the motor for vertical axes.

A vertical load may continue moving when motor torque is removed. If the machine requires the motor to mechanically hold the load when power is removed, an appropriate external holding mechanism or a motor configuration with an integral brake should be considered.

For horizontal axes or applications where a separate mechanical holding mechanism already exists, the absence of an integral brake may simplify the motor configuration.

Brake Parameter	Specification
Model	MPL-B330P-MJ72AA
Integral Brake	No
Brake Voltage	Not applicable
Holding Brake	Not included
Vertical Axis	Requires separate load-holding consideration
Emergency Stop	Machine-level safety system required

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12. Mounting Configuration

The motor uses an IEC metric flange mounting arrangement.

The mounting holes are identified as Type FF free mounting holes.

The mounting structure should be sufficiently rigid to maintain motor alignment under acceleration and deceleration loads.

Incorrect mounting alignment can cause excessive coupling forces, vibration, bearing loading, and positioning errors.

Mounting Parameter	Specification
Model	MPL-B330P-MJ72AA
Mounting Type	Flange Mount
Standard	IEC Metric
Mounting Hole Type	Type FF
Frame Size	100 mm
Shaft	Keyed
Installation Orientation	Machine-dependent
Mounting Requirement	Rigid and accurately aligned

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13. Typical Industrial Applications

Packaging Machinery

The MPL-B330P-MJ72AA is well suited to packaging equipment requiring fast and repeatable motion.

Typical applications include product indexing, film feeding, cutting mechanisms, sealing mechanisms, conveyor synchronization, label positioning, and rotary indexing.

The combination of 5000 rpm speed and low rotor inertia is useful for machines that operate through repeated high-speed cycles.

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Material Handling

Material-handling systems can use servo motors for precise positioning and controlled acceleration.

Typical applications include conveyor indexing, transfer units, pick-and-place mechanisms, positioning tables, automated feeders, and controlled rotary mechanisms.

The absolute encoder provides feedback required for accurate servo positioning.

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Electronic Assembly

Electronic assembly machinery often requires accurate and repeatable positioning.

The MPL-B330P-MJ72AA can be used for positioning axes, feeder mechanisms, indexing mechanisms, assembly heads, and transfer systems.

The low-inertia rotor supports quick movement between successive machine positions.

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Machine Tools

The motor can be used for suitable machine-tool positioning and auxiliary axes.

Its suitability depends on the required torque, speed, load inertia, duty cycle, mechanical transmission, and control architecture.

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Printing and Converting

Printing and converting equipment often requires synchronized movement between multiple machine sections.

Servo motors can provide controlled speed, position, and acceleration for rollers, feeders, indexing mechanisms, and other rotary or linear motion systems.

The 5000 rpm operating class provides useful speed capability for selected high-cycle applications.

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Robotics and Automated Mechanisms

The motor can be used in selected robotic or automated mechanisms where its torque, speed, feedback, and mechanical configuration are appropriate.

The motor’s multi-turn feedback is useful for motion systems that require accurate tracking of rotational position.

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14. Application Advantages

Application Requirement	MPL-B330P-MJ72AA Characteristic
High-speed motion	5000 rpm rated speed
Rapid acceleration	Low rotor inertia
Accurate position control	Multi-turn absolute encoder
Repetitive indexing	Closed-loop servo control
Compact machine installation	100 mm frame
Moderate power requirement	Approx. 1.8 kW
Mechanical coupling	Keyed shaft
Flexible cable routing	180° rotatable connector
Metric machine construction	IEC metric mounting
High-cycle operation	Brushless servo design

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15. Main Product Advantages

High-Speed 5000 rpm Operation

The 5000 rpm rating makes the MPL-B330P-MJ72AA suitable for machinery where rapid rotary movement is required.

High rotational speed can help reduce cycle time when the machine transmission and load are designed appropriately.

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Low-Inertia Performance

The low-inertia rotor helps the motor respond quickly to changes in commanded speed.

This is particularly valuable for machines with frequent acceleration and deceleration.

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Absolute Multi-Turn Feedback

The multi-turn absolute encoder provides detailed motor-position information to the servo controller.

This supports accurate positioning and repeatable motion.

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Compact 100 mm Frame

The 100 mm frame provides a relatively compact mechanical package for a motor with approximately 1.8 kW of rated power and 4.18 N·m continuous torque.

This can be useful when machine space is limited.

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Keyed Shaft

The keyed shaft provides a conventional mechanical interface and can simplify integration with compatible couplings and transmission components.

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Rotatable Right-Angle Connector

The 180° rotatable right-angle connector provides additional flexibility during machine installation.

This can be especially useful in compact machine cabinets or assemblies where cable clearance is limited.

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No Integral Brake

The absence of an integral brake can be appropriate for horizontal axes and applications that use a separate mechanical holding method.

It also differentiates the MJ72AA configuration from related braked motor configurations.

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16. Thermal and Environmental Considerations

Servo motor temperature depends on continuous torque, acceleration profile, ambient temperature, installation conditions, and machine duty cycle.

A motor operating at high speed with frequent acceleration may experience different thermal behavior from the same motor operating at a steady speed.

The motor should therefore be evaluated according to the actual machine duty cycle rather than only its nominal power rating.

Adequate heat dissipation around the motor housing should be maintained.

The motor should also be protected from environmental conditions outside its intended operating range.

Because this configuration has no shaft seal, applications involving direct exposure to liquids or contaminated environments require particular attention to machine enclosure and sealing arrangements.

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17. Installation Considerations

Before installation, verify the following:

• Servo-drive compatibility.
• Motor voltage class.
• Encoder and feedback compatibility.
• Motor frame size.
• Magnetic stack length.
• Mounting hole arrangement.
• Shaft diameter and extension.
• Keyway configuration.
• Coupling compatibility.
• Connector clearance.
• Cable compatibility.
• Load inertia.
• Continuous torque requirement.
• Peak torque requirement.
• Acceleration and deceleration profile.
• Duty cycle.
• Machine safety requirements.

The motor should be mounted on a rigid surface.

The coupling should be aligned carefully.

Excessive shaft misalignment can produce additional bearing loads and may reduce machine accuracy.

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18. Load and Inertia Matching

Servo motor selection should consider the relationship between motor inertia and reflected load inertia.

A motor can have sufficient rated torque while still being unsuitable for a particular application if the load inertia is excessive.

The transmission ratio can have a significant effect on reflected load inertia.

For applications with frequent acceleration and deceleration, the acceleration torque should be evaluated in addition to the continuous running torque.

The peak torque rating should also be used carefully. Peak torque is intended for short-duration dynamic requirements and should not be treated as the normal continuous operating point.

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19. Maintenance

Routine maintenance should include inspection of the motor housing, mounting hardware, coupling, shaft, cables, connectors, and machine structure.

The motor should be checked for abnormal vibration or unusual operating noise.

Changes in vibration may indicate coupling misalignment, mechanical looseness, bearing problems, or load-related issues.

The connector should be checked for secure engagement and signs of contamination.

Servo-drive alarms should be reviewed if the machine develops unexpected positioning errors, overcurrent conditions, following errors, or abnormal acceleration behavior.

The motor’s thermal condition should also be monitored in demanding high-cycle applications.

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20. Replacement Considerations

When replacing another motor with the MPL-B330P-MJ72AA, the complete catalog number should be compared.

A motor with the same MPL-B330P designation may still have a different feedback system, shaft arrangement, connector configuration, or brake option.

The MJ72AA configuration is particularly important because it combines a multi-turn absolute encoder, keyed shaft, right-angle rotatable SpeedTEC DIN connector, and no integral brake.

Therefore, replacement selection should consider both the motor’s electrical performance and its mechanical configuration.

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21. Five Related or Same-Series Models

The following models are useful for comparison within the MPL family or closely related MP-Series servo-motor range.

Model	Series	Voltage Class	Rated Speed	Continuous Torque	Rated Power	Feedback	Frame / Stack	Brake	Weight
MPL-B310P-MJ72AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 1.58 N·m	Approx. 0.77 kW	Multi-turn configuration	Smaller frame class	No	Approx. 2.7 kg
MPL-B320P-MJ72AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 3.05 N·m	Approx. 1.5 kW	Multi-turn configuration	Approx. 80 mm class	No	Approx. 3.7 kg
MPL-B330P-MJ72AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 4.18 N·m	Approx. 1.8 kW	Multi-turn absolute	100 mm / 76.2 mm	No	Approx. 4.82 kg
MPL-B420P-MJ72AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 4.74 N·m	Approx. 1.9 kW	Multi-turn configuration	100 mm class	No	Approx. 4.3 kg
MPL-B430P-MJ72AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 6.55 N·m	Approx. 2.2 kW	Multi-turn configuration	Approx. 115 mm class	No	Approx. 5.5 kg

The MPL-B310P is suitable for lower torque requirements and provides a smaller overall motor package.

The MPL-B320P provides a higher torque level while maintaining the 5000 rpm speed class.

The MPL-B330P-MJ72AA provides approximately 4.18 N·m of continuous torque in a 100 mm frame.

The MPL-B420P provides slightly higher continuous torque and can be considered when the B330P torque range is insufficient.

The MPL-B430P provides a higher torque capability and is suitable for applications requiring additional motor capacity.

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22. Five Same-Brand Popular Models for Comparison

The following models provide a useful comparison range within the same brand’s industrial servo-motor portfolio.

Model	Product Type	Voltage Class	Rated Speed	Continuous Torque	Rated Power	Feedback	Dimensions / Frame	Weight
MPL-B320P-MJ72AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 3.05 N·m	Approx. 1.5 kW	Multi-turn	Approx. 80 mm class	Approx. 3.7 kg
MPL-B330P-MJ72AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 4.18 N·m	Approx. 1.8 kW	Multi-turn absolute	100 mm / 76.2 mm stack	Approx. 4.82 kg
MPL-B420P-MJ72AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 4.74 N·m	Approx. 1.9 kW	Multi-turn	100 mm class	Approx. 4.3 kg
MPL-B430P-MJ72AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 6.55 N·m	Approx. 2.2 kW	Multi-turn	Approx. 115 mm class	Approx. 5.5 kg
MPL-B4560F-MJ72AA	Low-Inertia Servo Motor	400 V AC	3000 rpm	Approx. 14.1 N·m	Approx. 3.2 kW	Multi-turn configuration	Larger frame / longer stack	Approx. 11.8 kg

The smaller B320P model is appropriate where approximately 3 N·m of continuous torque is sufficient.

The B330P is a useful middle-range option for applications requiring approximately 4.18 N·m continuous torque and 5000 rpm.

The B420P and B430P increase the available torque while maintaining the high-speed 5000 rpm class.

The B4560F represents a substantially larger motor class, providing significantly higher continuous torque but also requiring more installation space and a larger mechanical structure.

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23. Related MPL-B330P Configurations

The MPL-B330P family includes multiple suffix configurations.

Although several models share the same general motor frame and performance class, their feedback, shaft, connector, or brake arrangements can differ.

Model	Rated Speed	Continuous Torque	Feedback	Shaft	Brake	General Configuration
MPL-B330P-MJ72AA	5000 rpm	Approx. 4.18 N·m	Multi-turn absolute	Keyed	No	SpeedTEC DIN, right-angle, rotatable
MPL-B330P-MJ74AA	5000 rpm	Approx. 4.18 N·m	Multi-turn absolute	Keyed	Brake configuration	Related B330P configuration
MPL-B330P-HJ72AA	5000 rpm	Approx. 4.18 N·m	Encoder configuration	Keyed	No	Related B330P configuration
MPL-B330P-HJ74AA	5000 rpm	Approx. 4.18 N·m	Encoder configuration	Keyed	Brake configuration	Related B330P configuration
MPL-B330P-HK72AA	5000 rpm	Approx. 4.18 N·m	Encoder configuration	Keyed	No	Related B330P configuration

The complete suffix should always be checked before selecting a replacement.

For example, a change in feedback type can require different drive parameters or feedback cabling even if the motor frame and torque ratings appear similar.

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24. Comparison with the MPL-A330P Family

A particularly relevant comparison is the MPL-A330P family.

The MPL-A330P-MJ72AA and MPL-B330P-MJ72AA have similar general mechanical characteristics, including a 100 mm frame, 76.2 mm stack length, 5000 rpm speed class, multi-turn feedback, keyed shaft, and no brake.

The principal difference is the voltage class.

Parameter	MPL-A330P-MJ72AA	MPL-B330P-MJ72AA
Model	MPL-A330P-MJ72AA	MPL-B330P-MJ72AA
Voltage Class	230 V class	400 V class
Armature Voltage	Approx. 230 V	Approx. 460 V
Frame	100 mm	100 mm
Stack	76.2 mm	76.2 mm
Rated Speed	5000 rpm	5000 rpm
Feedback	Multi-turn absolute	Multi-turn absolute
Shaft	Keyed	Keyed
Brake	No	No
Connector	Right-angle SpeedTEC DIN	Right-angle SpeedTEC DIN
Mounting	IEC Metric	IEC Metric
Approx. Weight	Similar class	Approx. 4.82 kg

This comparison demonstrates why voltage compatibility must be checked before replacing a servo motor.

A motor with the same frame and mechanical configuration may still require a different servo-drive system because of its voltage class.

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25. Machine Design Benefits

The MPL-B330P-MJ72AA provides several characteristics that are valuable in automated machine design.

The 100 mm frame allows the motor to fit into a relatively compact machine envelope.

The 5000 rpm speed rating allows the motor to support rapid rotary movement.

The low rotor inertia helps the machine achieve rapid acceleration and deceleration.

The absolute multi-turn encoder provides the feedback required for precise closed-loop control.

The keyed shaft provides a conventional mechanical connection.

The rotatable right-angle connector allows more flexible cable routing.

The absence of an integral brake keeps this particular configuration intended for applications where a motor holding brake is not required.

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26. Recommended Application Matching

Application	Suitability Characteristics
Packaging	High speed, rapid indexing, repeatable positioning
Material Handling	Controlled acceleration and positioning
Pick-and-Place	Low inertia and high-speed movement
Electronic Assembly	High-resolution feedback and repeatability
Converting Machinery	High-speed rotary motion and synchronization
Printing Equipment	Controlled speed and positioning
Machine Tools	Servo positioning and dynamic response
Automated Feeders	Rapid indexing and repeatable movement
Rotary Indexing	High speed and controlled acceleration
General Factory Automation	Closed-loop motion control

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27. Important Engineering Notes

The MPL-B330P-MJ72AA should be selected based on the complete machine motion profile rather than rated power alone.

The following factors should be evaluated during engineering:

Load torque: The continuous load torque should remain within the motor’s continuous operating capability.

Peak torque: Acceleration and transient requirements should remain within the allowable peak torque capability.

Load inertia: The reflected load inertia should be compatible with the servo system’s tuning range and dynamic response requirements.

Speed: The operating speed should remain within the motor and application limits.

Duty cycle: Repetitive high-load operation may create substantially more heat than continuous low-load operation.

Mechanical transmission: Gearboxes, belts, pulleys, couplings, and screws all affect the actual load seen by the motor.

Feedback compatibility: The absolute encoder configuration must be compatible with the selected servo drive and controller.

Mechanical compatibility: Frame, shaft, flange, mounting holes, stack length, and connector clearance should all be checked.

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28. Product Advantages Summary

Advantage	Description
High Speed	5000 rpm rated operating speed
Strong Continuous Torque	Approximately 4.18 N·m
High Peak Torque	Approximately 11.1 N·m
Compact Frame	100 mm frame
Low Inertia	Approximately 0.00012 kg·m² rotor inertia
Absolute Feedback	Multi-turn high-resolution encoder
Keyed Shaft	Conventional mechanical coupling interface
Flexible Connector	Right-angle connector with 180° rotation
Metric Mounting	IEC metric flange
No Integral Brake	Suitable for non-braked applications
Industrial Servo Design	Designed for closed-loop machine motion
Broad Application Range	Packaging, assembly, handling, indexing and automation

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29. Final Technical Summary

Category	MPL-B330P-MJ72AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B330P-MJ72AA
Motor Type	Permanent-Magnet AC Rotary Servo Motor
Voltage Class	400 V AC
Armature Voltage	460 V
Rated Power	Approx. 1.8 kW
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Speed	5000 rpm
Maximum Speed	5000 rpm
Rotor Inertia	Approx. 0.00012 kg·m²
Feedback	Multi-turn High-Resolution Absolute Encoder
Encoder Resolution	1024 sin/cos cycles/revolution
Feedback Protocol	Hiperface-type
Shaft	Keyed Shaft Extension
Brake	No Integral Brake
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180°
Frame Size	100 mm
Magnetic Stack	76.2 mm / 3.0 in
Mounting	IEC Metric
Mounting Holes	Type FF
Shaft Seal	No Shaft Seal
Approximate Weight	4.82 kg
Overall Dimensions	Configuration-dependent; verify mechanical drawing
Typical Applications	Packaging, material handling, assembly, converting, printing, indexing, machine tools and automation
Main Characteristics	High speed, low inertia, absolute feedback, keyed shaft and flexible connector

30. Overall Product Description

The MPL-B330P-MJ72AA is a 100 mm-frame, 5000 rpm low-inertia servo motor designed for industrial automation and precision motion-control applications.

Its approximately 1.8 kW rated power, 4.18 N·m continuous torque, and 11.1 N·m peak torque provide a useful combination of continuous output and short-duration dynamic capability.

The motor’s low rotor inertia supports fast acceleration and deceleration, making it suitable for machines that perform repetitive positioning and indexing movements.

Its multi-turn high-resolution absolute encoder provides the feedback required for accurate closed-loop servo control.

The keyed shaft extension provides a conventional mechanical interface for compatible couplings and transmission systems.

The right-angle SpeedTEC DIN connector can be rotated through approximately 180 degrees, giving machine builders additional flexibility when routing motor cables around compact mechanical structures.

The 100 mm frame and 76.2 mm magnetic stack provide a relatively compact package for this performance level.

The motor has no integral brake, so applications requiring mechanical holding after servo power removal should incorporate a suitable external holding mechanism or use an appropriate braked motor configuration.

Overall, the MPL-B330P-MJ72AA is characterized by a combination of high rotational speed, low rotor inertia, absolute multi-turn feedback, moderate-to-high servo torque, compact 100 mm mechanical construction, keyed shaft coupling, and flexible connector orientation.

It is particularly appropriate for high-cycle industrial machinery where fast and repeatable motion is required, including packaging equipment, indexing machines, automated assembly systems, material-handling equipment, converting machinery, printing-related mechanisms, and general factory automation.