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Allen-Bradley MPL-B330P-MJ74AA Servo Motor

1. Product Overview

The MPL-B330P-MJ74AA is a low-inertia brushless permanent-magnet AC rotary servo motor in the MP-Series MPL family.

It is designed for industrial automation equipment that requires high-speed rotation, accurate positioning, rapid acceleration and deceleration, repeatable indexing, and stable closed-loop motion control.

The motor has a 400 V AC class electrical design, with an armature voltage of approximately 460 V, and a rated speed of 5000 rpm.

The motor provides approximately 4.18 N·m of continuous torque and approximately 11.1 N·m of peak torque, with a continuous rated output of approximately 1.8 kW.

The MPL-B330P-MJ74AA uses a 100 mm frame size and a 76.2 mm magnetic stack length, giving it a compact and practical mechanical package for high-speed industrial motion applications.

A major feature of this model is its multi-turn high-resolution absolute encoder. The encoder provides the feedback required by the servo control system for accurate position and speed control.

The motor uses a keyed shaft extension and a SpeedTEC DIN right-angle connector that can be rotated through approximately 180 degrees.

Unlike the non-braked MJ72AA configuration, the MJ74AA includes an integral 24 V DC holding brake.

This brake makes the motor particularly useful for applications where the motor or axis must be held in position after servo power is removed, subject to the machine’s safety and load-holding requirements.

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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-MJ74AA
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
Rated Power	Approximately 1.8 kW
Continuous Torque	Approximately 4.18 N·m
Peak Torque	Approximately 11.1 N·m
Frame Size	100 mm
Frame Classification	Frame 3
Magnetic Stack Length	76.2 mm / 3.0 in
Feedback	Multi-turn High-Resolution Absolute Encoder
Feedback Resolution	1024 sin/cos cycles per revolution
Feedback Protocol	Hiperface-type
Shaft	Keyed Shaft Extension
Brake	24 V DC Integral Holding Brake
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180° Rotatable
Mounting	IEC Metric
Mounting Holes	Type FF Free Mounting Holes
Shaft Seal	No Shaft Seal
Rotor Design	Low Inertia
Approximate Weight	5.70 kg

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3. Detailed Technical Parameters

Parameter	MPL-B330P-MJ74AA Specification
Model	MPL-B330P-MJ74AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL
Motor Category	Low-Inertia Servo Motor
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
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 0.00013 kg·m²
Feedback Type	Absolute Multi-turn Encoder
Encoder Resolution	1024 sin/cos cycles/revolution
Feedback Protocol	Hiperface-type
Shaft Type	Keyed Shaft Extension
Shaft Seal	No Shaft Seal
Brake	Integral 24 V DC Holding Brake
Connector Type	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180° Rotatable
Mounting Type	Flange Mount
Mounting Standard	IEC Metric
Mounting Holes	Type FF
Frame Size	100 mm
Frame Classification	Frame 3
Magnetic Stack	76.2 mm
Magnetic Stack	3.0 in
Number of Phases	3
Duty Classification	S1
Typical Operating Temperature Range	0 to 40 °C
Rated Frequency Range	Up to approximately 400 Hz
Approximate Weight	5.70 kg
Overall Envelope	Configuration-dependent; verify detailed mechanical drawing

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4. Dimensions and Mechanical Construction

The MPL-B330P-MJ74AA uses a 100 mm frame.

The frame size is approximately 100 mm × 100 mm class, corresponding to approximately 3.94 inches in the principal frame dimension.

The motor has a 76.2 mm magnetic stack, equivalent to 3.0 inches.

The frame and stack combination provides a useful balance between mechanical compactness and motor torque capability.

The exact overall motor envelope includes the front mounting flange, shaft extension, motor housing, and connector arrangement. Because the connector and shaft configuration influence the installation envelope, the complete mechanical drawing should be used when exact machine dimensions are required.

The approximate motor weight is 5.70 kg.

Mechanical Parameter	Specification
Model	MPL-B330P-MJ74AA
Frame Size	100 mm
Frame Classification	Frame 3
Frame Dimension Class	100 mm / 3.94 in
Magnetic Stack Length	76.2 mm
Magnetic Stack Length	3.0 in
Mounting Standard	IEC Metric
Mounting Type	Flange Mount
Mounting Hole Type	Type FF
Shaft Configuration	Keyed
Shaft Seal	None
Connector	SpeedTEC DIN
Connector Orientation	Right Angle
Connector Rotation	180°
Integral Brake	Yes
Brake Voltage	24 V DC
Approximate Weight	5.70 kg
Overall Length	Configuration-dependent
Shaft Diameter	Verify detailed mechanical drawing
Shaft Extension	Keyed; verify detailed mechanical drawing
Flange Dimensions	100 mm frame class; verify detailed drawing

For replacement work, the 100 mm frame should not be used as the only dimensional reference. Shaft geometry, flange arrangement, stack length, connector clearance, brake wiring, feedback system, and overall machine clearance should all be checked.

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5. Electrical Characteristics

The MPL-B330P-MJ74AA is a 400 V-class three-phase permanent-magnet AC servo motor.

Its armature voltage is approximately 460 V.

The motor is intended to be operated through a compatible servo drive rather than being connected directly to a conventional AC motor starter.

The servo drive controls the motor’s current and torque while using encoder feedback to maintain the commanded position and velocity.

Electrical Parameter	Specification
Model	MPL-B330P-MJ74AA
Voltage Class	400 V AC
Armature Voltage	460 V
Phase	3-phase
Rated Power	Approx. 1.8 kW
Rated Speed	5000 rpm
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Frequency	Up to approximately 400 Hz
Feedback	Absolute Multi-turn Encoder
Brake	24 V DC
Motor Control	Closed-loop servo
Rotor Design	Low inertia

The actual operating current depends on the load, acceleration profile, speed, duty cycle, servo-drive settings, and machine mechanics.

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6. Torque and Speed Performance

The MPL-B330P-MJ74AA is designed for high-speed servo applications.

Its rated speed is 5000 rpm, while its continuous torque is approximately 4.18 N·m.

The motor can provide approximately 11.1 N·m peak torque for short-duration dynamic operation.

This combination allows the motor to perform rapid acceleration, deceleration, indexing, and positioning while maintaining a relatively compact frame size.

Performance Parameter	Specification
Model	MPL-B330P-MJ74AA
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. 0.00013 kg·m²
Motor Frame	100 mm
Magnetic Stack	76.2 mm
Motion Type	Position / Velocity / Torque Control
Dynamic Application	High-cycle servo motion

The peak torque specification is intended for transient operation. Continuous operation should be evaluated against the continuous torque capability and the actual thermal duty cycle.

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7. Low-Inertia Motor Design

The MPL-B330P-MJ74AA belongs to the MPL low-inertia servo motor series.

Low rotor inertia is valuable in machinery where the motor must repeatedly change speed.

During acceleration, some of the available motor torque is required to accelerate the rotor itself. A lower rotor inertia reduces this requirement and allows more of the motor’s torque capability to be applied to the external load.

This makes the motor well suited to machines with frequent start-stop cycles, short positioning movements, rapid indexing, and repeated reversals.

The rotor inertia is approximately 0.00013 kg·m².

Low-Inertia Characteristic	Benefit
Low Rotor Inertia	Faster acceleration response
Low Rotating Mass	Reduced motor self-acceleration requirement
High-Speed Capability	Supports rapid machine cycles
Servo Feedback	Accurate closed-loop movement
High Peak Torque	Useful for short acceleration events
Compact Frame	Easier integration into machine structures

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8. Encoder and Feedback System

The MPL-B330P-MJ74AA uses a multi-turn high-resolution absolute encoder.

The encoder provides position feedback to the servo control system.

The encoder resolution is approximately 1024 sin/cos cycles per revolution and uses a Hiperface-type feedback protocol.

The absolute multi-turn configuration allows the control system to track motor position over multiple revolutions.

This is particularly useful in applications where the machine must maintain accurate rotational position information.

Feedback Parameter	Specification
Model	MPL-B330P-MJ74AA
Feedback Type	Absolute Multi-turn
Encoder Category	High Resolution
Resolution	1024 sin/cos cycles/revolution
Feedback Protocol	Hiperface-type
Position Feedback	Yes
Speed Feedback	Yes
Multi-turn Capability	Yes
Closed-Loop Control	Yes
Primary Function	Position and velocity feedback

The encoder is an essential part of the complete servo system. The motor should therefore be matched with a compatible drive and feedback cable arrangement.

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9. Integrated 24 V DC Holding Brake

One of the most important characteristics of the MPL-B330P-MJ74AA is its integral 24 V DC holding brake.

The brake is useful when an axis must remain mechanically held after the servo motor is disabled.

This can be especially important for vertical or inclined machine axes where gravity can cause the load to move when motor torque is removed.

The brake should be regarded as a holding device rather than as the primary means of dynamic stopping unless the complete machine design specifically permits such operation.

Brake Parameter	Specification
Model	MPL-B330P-MJ74AA
Brake Included	Yes
Brake Type	Integral Holding Brake
Brake Voltage	24 V DC
Brake Function	Holding
Primary Application	Holding motor/load when servo torque is removed
Vertical Axis Use	Suitable where properly engineered
Dynamic Braking Role	Should not automatically be treated as the primary dynamic stop
Safety Function	Machine-level safety design required

The brake control should be coordinated correctly with the servo drive and machine control system.

The machine designer should also consider load inertia, gravity, stopping distance, emergency-stop requirements, and mechanical safety independently of the motor brake.

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10. Keyed Shaft Configuration

The motor uses a keyed shaft extension.

A keyed shaft provides a positive mechanical interface for compatible couplings, pulleys, gearboxes, timing mechanisms, and other transmission components.

The keyway helps transmit torque between the motor shaft and the connected machine component.

Proper shaft alignment remains important.

Incorrect coupling alignment can increase radial and axial loads and may result in vibration, bearing wear, positioning errors, or reduced machine life.

Shaft Parameter	Specification
Model	MPL-B330P-MJ74AA
Shaft Type	Keyed
Shaft Extension	Yes
Shaft Seal	No
Coupling Interface	Keyed mechanical connection
Typical Connection	Coupling, gearbox, pulley or transmission
Alignment Requirement	Accurate alignment required

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11. SpeedTEC DIN Connector

The MPL-B330P-MJ74AA uses a SpeedTEC DIN right-angle connector.

The connector is designed for industrial servo-motor cabling and can be rotated through approximately 180 degrees.

This provides additional flexibility when installing the motor inside compact machinery.

The connector orientation can be adjusted to improve cable routing and reduce interference with machine components.

Connector Parameter	Specification
Model	MPL-B330P-MJ74AA
Connector Type	SpeedTEC DIN
Connector Style	Right Angle
Rotation	180° Rotatable
Connection	Quick Connect
Installation Benefit	Flexible cable direction
Cable Routing	Suitable for compact machine layouts
Maintenance	Check locking and cable condition

The cable should not be used to support the connector mechanically.

Adequate clearance should be maintained around the connector so that cable movement does not place excessive force on the motor connection.

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12. Mounting Configuration

The MPL-B330P-MJ74AA uses an IEC metric flange-mounting configuration.

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

A rigid machine mounting surface is recommended because servo motors can generate substantial acceleration and deceleration forces during dynamic operation.

Mounting Parameter	Specification
Model	MPL-B330P-MJ74AA
Mounting Type	Flange Mount
Standard	IEC Metric
Frame Size	100 mm
Mounting Hole Type	Type FF
Shaft	Keyed
Installation	Machine-dependent
Structural Requirement	Rigid and accurately aligned

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13. Typical Applications

Packaging Machinery

The MPL-B330P-MJ74AA is well suited to packaging machinery that requires high-speed positioning and repeated machine cycles.

Typical applications include product indexing, film feeding, cutting, sealing, labeling, rotary indexing, conveyor synchronization, and automated product handling.

The low-inertia motor design helps support rapid acceleration and deceleration.

The integral 24 V DC brake is also useful for selected vertical or mechanically elevated mechanisms that require a holding function.

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Material Handling

Material-handling systems frequently require controlled acceleration and precise positioning.

The motor can be used in conveyor positioning systems, transfer mechanisms, automated feeders, rotary tables, indexing systems, and other motion-control applications.

The encoder provides the feedback required for accurate positioning while the motor brake can provide a holding function when properly integrated into the machine design.

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Electronic Assembly

Electronic assembly equipment often requires repeatable and accurate motion.

The MPL-B330P-MJ74AA can be used for indexing axes, positioning mechanisms, feeder systems, transfer mechanisms, and automated assembly equipment.

Its high-speed capability supports short machine cycles, while the absolute encoder provides accurate position feedback.

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Automotive Production Machinery

Automated automotive production equipment frequently uses servo motors for indexing, positioning, feeding, and coordinated movement.

The motor’s combination of speed, torque, low inertia, absolute feedback, and holding brake makes it suitable for selected automotive production-machine applications.

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Printing and Converting

Printing and converting machinery can require high-speed synchronized motion.

The MPL-B330P-MJ74AA can be applied to suitable rollers, feeders, indexing mechanisms, positioning axes, and other rotary systems where 5000 rpm-class servo operation is appropriate.

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Machine Tools

The motor can be used in suitable machine-tool axes and auxiliary motion systems.

The actual motor selection should take into account load torque, acceleration, transmission ratio, inertia, operating speed, thermal duty, and mechanical precision requirements.

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Automated Production Equipment

General factory automation is another important application area.

The motor can be used for indexing, rotary positioning, transfer systems, machine feeders, assembly mechanisms, and other automated machine axes.

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14. Application Advantages

Application Requirement	MPL-B330P-MJ74AA Characteristic
High-speed motion	5000 rpm
Rapid acceleration	Low rotor inertia
Accurate positioning	Multi-turn absolute encoder
Repetitive indexing	Closed-loop servo control
Vertical-axis holding	Integral 24 V DC brake
Compact installation	100 mm frame
Moderate machine power	Approx. 1.8 kW
Mechanical transmission	Keyed shaft
Flexible cable routing	180° rotatable right-angle connector
Metric machine construction	IEC metric mounting
High-cycle operation	Brushless servo design

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15. Main Product Advantages

15.1 High-Speed Operation

The 5000 rpm rated speed makes the MPL-B330P-MJ74AA suitable for high-cycle industrial machinery.

It can support rapid rotary movement and short machine cycles when the mechanical transmission and load are correctly selected.

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15.2 Low-Inertia Response

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

This is particularly useful for applications involving frequent starts, stops, reversals, and indexing.

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15.3 High Continuous Torque

Approximately 4.18 N·m continuous torque provides useful output for a broad range of automated machine axes.

The motor can maintain continuous torque while operating within its specified thermal and electrical limits.

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15.4 High Peak Torque

Approximately 11.1 N·m peak torque provides additional torque capacity for short-duration acceleration and transient load conditions.

This can be useful in machines that need rapid changes in velocity.

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15.5 Absolute Multi-Turn Feedback

The multi-turn absolute encoder provides accurate position information.

This supports precise machine positioning and repeatable motion.

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15.6 Integral 24 V DC Brake

The integral brake is one of the major differences between the MJ74AA and non-braked configurations.

The brake can help hold an axis when motor torque is removed, subject to correct engineering and machine safety requirements.

This makes the model particularly useful for certain vertical-axis applications.

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15.7 Keyed Shaft

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

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15.8 Flexible Connector Orientation

The right-angle SpeedTEC DIN connector can be rotated approximately 180 degrees.

This provides greater flexibility when routing cables through compact machine structures.

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15.9 Compact 100 mm Frame

The 100 mm frame offers a useful balance between motor output and mechanical size.

The motor can provide approximately 1.8 kW while retaining a relatively compact frame arrangement.

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16. Thermal and Environmental Considerations

The motor’s actual temperature depends on load torque, speed, acceleration frequency, ambient temperature, installation arrangement, and duty cycle.

A machine operating continuously near the motor’s torque limit will produce substantially different thermal conditions from a machine using the motor intermittently.

The motor should therefore be selected according to the actual machine duty profile.

The specified operating temperature is approximately 0 to 40 °C for the referenced configuration.

The motor should have sufficient clearance for heat dissipation.

Because this configuration does not use a shaft seal, the machine enclosure and surrounding mechanical components should provide appropriate protection in environments containing liquids, dust, oil, coolant, or other contaminants.

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17. Installation Considerations

Before installation, verify the following items:

• Servo-drive compatibility.
• 400 V-class motor compatibility.
• 460 V armature voltage compatibility.
• Absolute encoder compatibility.
• Feedback cable compatibility.
• 24 V DC brake wiring.
• Brake control sequence.
• Frame size.
• Magnetic stack length.
• Mounting holes.
• Shaft diameter and extension.
• Keyway arrangement.
• Coupling compatibility.
• Connector clearance.
• Cable routing.
• Load inertia.
• Continuous torque.
• Peak torque.
• Acceleration and deceleration profile.
• Duty cycle.
• Vertical-axis requirements.
• Machine safety requirements.

The motor should be mounted on a rigid and accurately aligned surface.

The shaft coupling should be aligned carefully to minimize additional bearing loads.

The brake wiring should also be correctly integrated with the servo control system.

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18. Load and Inertia Matching

Servo motor selection should take into account the complete mechanical load.

A motor can have sufficient rated power while still being unsuitable for an application if the reflected load inertia is excessive.

Gearboxes, belts, pulleys, lead screws, ball screws, and other transmissions can substantially change the inertia seen by the motor.

For high-speed positioning applications, acceleration torque is particularly important.

The required acceleration torque can be estimated from the combined motor and reflected load inertia and the required angular acceleration.

The motor should also be evaluated for thermal performance during repetitive machine cycles.

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19. Brake and Vertical-Axis Applications

The integral 24 V DC brake makes the MPL-B330P-MJ74AA particularly useful for selected vertical-axis applications.

For example, a vertical positioning axis may need to remain stationary when servo power is removed.

In such a situation, the brake can provide a holding function when correctly controlled.

However, the brake should not automatically be treated as the sole machine safety device.

The complete machine should consider gravity, load mass, stopping distance, emergency-stop requirements, mechanical locks, counterbalance systems, and other safety measures.

Vertical-Axis Requirement	Consideration
Servo power removed	Brake can provide holding function
Vertical load	Brake capacity must be checked
Emergency stop	Machine safety system required
Gravity load	Must be considered separately
Dynamic stopping	Servo control and mechanical system must be evaluated
Brake control	Correct timing and sequencing required
Maintenance	Brake condition should be monitored

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20. Maintenance Recommendations

Routine maintenance should include inspection of:

• Motor mounting bolts.
• Coupling alignment.
• Shaft and keyway condition.
• Motor vibration.
• Motor temperature.
• Servo cables.
• Feedback connector.
• Power connector.
• Brake wiring.
• Brake operation.
• Machine bearings.
• Mechanical transmission components.
• Servo-drive alarms.

Changes in motor vibration or noise can indicate mechanical misalignment, bearing wear, coupling problems, or excessive load.

The brake should also be checked periodically in applications where it is frequently used for holding.

The encoder and connector should remain securely connected and protected from contamination.

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21. Replacement Considerations

When replacing another servo motor with the MPL-B330P-MJ74AA, the entire catalog number should be checked.

The MJ74AA suffix is significant because it identifies a particular combination of feedback, shaft, connector, and brake configuration.

The most important replacement checks include:

Replacement Item	Required Check
Model	Complete catalog number
Voltage	400 V class / 460 V
Frame	100 mm
Stack	76.2 mm
Speed	5000 rpm
Torque	4.18 N·m continuous
Feedback	Multi-turn absolute
Shaft	Keyed
Connector	SpeedTEC DIN, right angle
Connector Rotation	180°
Brake	24 V DC
Mounting	IEC metric / Type FF
Weight	Approx. 5.70 kg
Drive	Verify compatible servo drive
Cable	Verify motor and feedback cable

A motor with the same frame size is not necessarily a direct replacement.

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22. Five Related or Same-Series Models

The following models are closely related to the MPL-B330P-MJ74AA and can be considered when comparing motor size, torque, speed, and application requirements.

Model	Series	Voltage Class	Rated Speed	Continuous Torque	Rated Power	Feedback	Frame / Stack	Brake	Weight
MPL-B310P-MJ74AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 1.58 N·m	Approx. 0.77 kW	Absolute multi-turn configuration	Smaller frame class	24 V DC	Approx. 2.7 kg
MPL-B320P-MJ74AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 3.05 N·m	Approx. 1.5 kW	Absolute multi-turn configuration	Approx. 80 mm class	24 V DC	Approx. 3.7 kg
MPL-B330P-MJ74AA	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	24 V DC	Approx. 5.70 kg
MPL-B420P-MJ74AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 4.74 N·m	Approx. 1.9 kW	Multi-turn configuration	100 mm class	24 V DC	Approx. 4.3 kg
MPL-B430P-MJ74AA	MPL Low-Inertia	400 V AC	5000 rpm	Approx. 6.55 N·m	Approx. 2.2 kW	Multi-turn configuration	Approx. 115 mm class	24 V DC	Approx. 5.5 kg

The B310P is intended for lower torque requirements.

The B320P provides a moderate increase in continuous torque while retaining the 5000 rpm class.

The B330P-MJ74AA provides approximately 4.18 N·m of continuous torque in a 100 mm frame.

The B420P provides slightly higher continuous torque and can be considered where additional torque capacity is required.

The B430P provides still higher torque and power for larger machine axes.

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23. Five Same-Brand Models for Comparison

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

Model	Product Type	Voltage Class	Rated Speed	Continuous Torque	Rated Power	Feedback	Dimensions / Frame	Brake	Weight
MPL-B320P-MJ74AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 3.05 N·m	Approx. 1.5 kW	Multi-turn absolute	Approx. 80 mm class	24 V DC	Approx. 3.7 kg
MPL-B330P-MJ74AA	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	24 V DC	Approx. 5.70 kg
MPL-B420P-MJ74AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 4.74 N·m	Approx. 1.9 kW	Multi-turn configuration	100 mm class	24 V DC	Approx. 4.3 kg
MPL-B430P-MJ74AA	Low-Inertia Servo Motor	400 V AC	5000 rpm	Approx. 6.55 N·m	Approx. 2.2 kW	Multi-turn configuration	Approx. 115 mm class	24 V DC	Approx. 5.5 kg
MPL-B4560F-MJ74AA	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	24 V DC	Approx. 11.8 kg

These models represent different levels of motor capacity.

The B320P is suitable for smaller axes.

The B330P-MJ74AA provides a useful combination of 5000 rpm speed, approximately 4.18 N·m continuous torque, and integral braking.

The B420P and B430P increase torque capacity while remaining in the high-speed 5000 rpm class.

The B4560F is a significantly larger motor designed for substantially higher continuous torque requirements.

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24. Related MPL-B330P Configurations

Several MPL-B330P models share the same general motor frame and performance class but use different suffix configurations.

Model	Speed	Continuous Torque	Feedback	Shaft	Brake	Connector / 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	24 V DC	SpeedTEC DIN, right-angle, rotatable
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	24 V DC	Related B330P configuration
MPL-B330P-HK74AA	5000 rpm	Approx. 4.18 N·m	Encoder configuration	Keyed	24 V DC	Related B330P configuration

The MJ74AA version is especially notable because it combines multi-turn absolute feedback with the integral 24 V DC brake.

This makes it mechanically and functionally different from the non-braked MJ72AA version even though the two models share the same basic B330P motor class.

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25. MJ72AA vs MJ74AA

The MPL-B330P-MJ72AA and MPL-B330P-MJ74AA are closely related configurations.

The main functional difference is the integrated brake.

Parameter	MPL-B330P-MJ72AA	MPL-B330P-MJ74AA
Model	MPL-B330P-MJ72AA	MPL-B330P-MJ74AA
Voltage Class	400 V AC	400 V AC
Armature Voltage	460 V	460 V
Frame Size	100 mm	100 mm
Stack Length	76.2 mm	76.2 mm
Rated Speed	5000 rpm	5000 rpm
Continuous Torque	Approx. 4.18 N·m	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m	Approx. 11.1 N·m
Rated Power	Approx. 1.8 kW	Approx. 1.8 kW
Feedback	Multi-turn absolute	Multi-turn absolute
Shaft	Keyed	Keyed
Connector	SpeedTEC DIN, right angle	SpeedTEC DIN, right angle
Connector Rotation	180°	180°
Brake	No	24 V DC
Weight	Approx. 4.82 kg	Approx. 5.70 kg
Typical Use	Non-braked axes	Axes requiring holding brake

The MJ74AA version is therefore particularly useful when the machine requires an integrated motor holding function.

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26. Why the Integral Brake Is Important

The integral brake provides an additional machine-control function that is not available in a non-braked configuration.

For a horizontal axis, the brake may not be necessary if the load remains mechanically stable when the servo motor is disabled.

For a vertical axis, however, the load may move under gravity.

In this situation, an integral holding brake can provide an important mechanical holding function.

The actual brake capacity and machine stopping behavior must still be evaluated against the load.

The brake should not be considered a substitute for a complete machine safety system.

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27. Machine Design Benefits

The MPL-B330P-MJ74AA offers several characteristics that are useful to machine builders.

The 100 mm frame provides a practical balance between physical size and motor output.

The 5000 rpm speed capability supports high-speed machine cycles.

The low-inertia rotor supports rapid acceleration and deceleration.

The multi-turn absolute encoder provides accurate position feedback.

The keyed shaft provides a conventional mechanical connection.

The rotatable right-angle connector allows flexible cable routing.

The integral 24 V DC brake provides an additional holding function for appropriate machine axes.

Together, these features make the motor suitable for a wide range of industrial motion-control systems.

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28. Recommended Application Matching

Application	Relevant MPL-B330P-MJ74AA Characteristics
Packaging	High speed, indexing, positioning and brake option
Material Handling	Controlled movement and holding capability
Pick-and-Place	Low inertia and high-speed response
Electronic Assembly	Accurate absolute feedback
Automotive Automation	High-cycle positioning and indexing
Converting	High-speed rotary motion
Printing Machinery	Speed control and synchronized movement
Machine Tools	Servo positioning and dynamic response
Vertical Positioning	Integral 24 V DC holding brake
Automated Feeders	Rapid indexing and repeatable positioning
Rotary Tables	High-speed controlled rotation
General Factory Automation	Closed-loop servo operation

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29. Engineering Selection Guidelines

The MPL-B330P-MJ74AA should be selected according to the actual machine load rather than by rated power alone.

The following parameters should be evaluated:

Continuous Torque

The continuous torque required by the load should remain within the motor’s continuous capability.

Peak Torque

Acceleration and transient loads should be checked against the motor’s peak torque capability.

Speed

The required operating speed should remain within the applicable motor and mechanical system limits.

Load Inertia

The reflected load inertia has a major influence on servo response and tuning.

Duty Cycle

A motor that operates intermittently at high torque can have different thermal requirements from a motor operating continuously at the same average speed.

Brake Requirement

If the machine requires holding after servo power removal, the integral brake configuration should be evaluated carefully.

Mechanical Dimensions

The frame, stack, shaft, flange, connector, and cable clearance must all be checked.

Feedback Compatibility

The absolute multi-turn encoder must be compatible with the selected servo drive and controller.

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30. Maintenance Checklist

Maintenance Item	Recommended Inspection
Motor Housing	Check for damage and abnormal temperature
Mounting Bolts	Check tightness
Shaft	Check wear and mechanical condition
Keyway	Check for damage or looseness
Coupling	Check alignment
Bearings	Monitor noise and vibration
Encoder Cable	Check condition and connection
Motor Connector	Check locking and contamination
Brake Cable	Check insulation and connection
Brake Operation	Verify holding function
Servo Drive	Check alarms and faults
Machine Transmission	Check belts, gears and couplings
Motor Temperature	Monitor during high-load cycles
Vibration	Investigate changes from normal operation

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31. Key Specifications at a Glance

Specification	MPL-B330P-MJ74AA
Model	MPL-B330P-MJ74AA
Brand	Allen-Bradley
Family	MP-Series
Series	MPL Low-Inertia Servo
Motor Type	Brushless Permanent-Magnet AC Servo
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
Rotor Inertia	Approx. 0.00013 kg·m²
Feedback	Multi-turn High-Resolution Absolute Encoder
Encoder Resolution	1024 sin/cos cycles/revolution
Feedback Protocol	Hiperface-type
Shaft	Keyed
Brake	24 V DC Integral Holding 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	5.70 kg
Overall Dimensions	Configuration-dependent; verify mechanical drawing
Typical Applications	Packaging, material handling, assembly, automotive automation, converting, printing and machine tools

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32. Overall Product Description

The Allen-Bradley MPL-B330P-MJ74AA is a high-speed, low-inertia permanent-magnet AC servo motor designed for demanding industrial motion-control applications.

Its combination of 5000 rpm rated speed, approximately 4.18 N·m continuous torque, approximately 11.1 N·m peak torque, and approximately 1.8 kW rated power makes it suitable for a broad range of automated machine axes.

The motor uses a 100 mm frame and 76.2 mm magnetic stack, providing a relatively compact mechanical package for its performance class.

The multi-turn high-resolution absolute encoder provides the feedback required for accurate closed-loop position and velocity control.

The keyed shaft extension provides a conventional connection for compatible mechanical transmission components.

The SpeedTEC DIN right-angle connector can be rotated through approximately 180 degrees, giving the machine designer greater flexibility when routing cables around the motor.

The most significant feature of the MJ74AA configuration is the integral 24 V DC holding brake.

This brake makes the motor particularly useful for machine axes that require a holding function after servo torque is removed.

The brake is especially relevant to vertical-axis applications where gravity can cause an uncontrolled movement if the motor is disabled.

The motor’s low-inertia construction also makes it suitable for high-cycle machinery that repeatedly accelerates, decelerates, reverses, and indexes.

Typical applications include packaging machinery, material handling, electronic assembly, automotive production equipment, printing and converting machinery, machine tools, rotary indexing systems, automated feeders, and general industrial automation.

From a mechanical perspective, the combination of a 100 mm frame, 76.2 mm magnetic stack, keyed shaft, IEC metric mounting, Type FF free mounting holes, and rotatable right-angle connector provides a practical configuration for machine integration.

From an electrical and control perspective, the combination of 460 V armature voltage, 5000 rpm operation, multi-turn absolute feedback, 4.18 N·m continuous torque, and 11.1 N·m peak torque makes the motor suitable for high-speed closed-loop motion systems.

For replacement applications, the complete MPL-B330P-MJ74AA catalog number should be matched carefully.

The motor should not be replaced solely according to frame size or power rating. Feedback type, shaft configuration, connector arrangement, brake option, mounting pattern, stack length, and servo-drive compatibility all need to be considered.

In summary, the MPL-B330P-MJ74AA can be characterized as a 100 mm-frame, 5000 rpm, 1.8 kW-class, low-inertia servo motor with approximately 4.18 N·m continuous torque, multi-turn absolute feedback, keyed shaft, rotatable SpeedTEC DIN connector, and integral 24 V DC holding brake.

Its combination of high-speed performance, low rotor inertia, accurate feedback, compact construction, and integrated holding brake makes it particularly well suited to demanding automated machinery where fast, repeatable, and controlled movement is required.