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MPL-B330P-HJ74AA Servo Motor — Detailed Product Information and Technical Specifications

1. Product Overview

The MPL-B330P-HJ74AA is a high-speed, low-inertia brushless servo motor designed for demanding motion-control applications where fast acceleration, accurate positioning, stable speed control, and compact mechanical construction are required.

The motor belongs to the MP-Series MPL low-inertia servo motor family and uses a 400 V-class electrical design. It is built around a 100 mm frame size and a 76.2 mm magnetic stack length, providing a practical balance between motor size, continuous torque, peak torque, and high-speed operation.

The motor has a rated speed of approximately 5000 rpm, making it suitable for machine axes that require rapid indexing, short positioning cycles, high-speed rotary movement, or frequent acceleration and deceleration.

The low-inertia rotor design allows the motor to respond quickly to changes in commanded speed and position. This characteristic is particularly useful in automation equipment where the motor must repeatedly start, stop, reverse direction, or follow rapidly changing motion profiles.

The MPL-B330P-HJ74AA is equipped with a 24 V DC holding brake, making it particularly useful for applications where the motor shaft must be held when power is removed or when the machine axis needs additional holding capability.

The motor uses an incremental encoder feedback system and is intended to operate as part of a compatible servo drive and motion-control system. The encoder provides the feedback required for closed-loop speed and position control.

Its keyed shaft construction provides a conventional mechanical interface for coupling the motor to gearboxes, pulleys, belts, lead screws, ball screws, rotary mechanisms, and other machine components.

The right-angle connector arrangement also provides additional flexibility when the available installation space is limited. The connector can be rotated to accommodate different cable-routing directions, which can be useful when the motor is installed inside a compact machine enclosure.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Motor Type	Brushless AC Servo Motor
Model	MPL-B330P-HJ74AA
Application Class	Industrial Servo / Motion Control
Voltage Class	400 V Class
Frame Size	100 mm
Magnetic Stack Length	76.2 mm
Rated Speed	5000 rpm
Feedback Type	Incremental Encoder
Brake	24 V DC Holding Brake
Shaft Type	Keyed Shaft
Connector Type	SpeedTEC DIN, right-angle style
Mounting Style	IEC metric mounting
Mounting Holes	Free mounting-hole configuration
Shaft Seal	No shaft seal

The MPL series is designed around low-inertia motor construction. Compared with larger, higher-inertia servo motors, the MPL design places considerable emphasis on rapid dynamic response and high-speed operation.

The 100 mm frame of the MPL-B330P-HJ74AA provides a useful intermediate motor size for machinery requiring more torque than smaller 63 mm or 80 mm class servo motors while still maintaining a relatively compact installation footprint.

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3. Detailed Technical Parameters

Parameter	Specification
Model	MPL-B330P-HJ74AA
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motor
Motor Type	Brushless Permanent-Magnet Servo Motor
Voltage Class	400 V Class
Nominal Supply Class	460 V AC class
Rated Speed	5000 rpm
Continuous Torque	Approximately 4.18 N·m
Peak Torque	Approximately 11.1 N·m
Rated Output Power	Approximately 1.8 kW
Feedback	2000-line Incremental Encoder
Brake	24 V DC Holding Brake
Shaft	Keyed Shaft Extension
Frame Size	100 mm
Magnetic Stack Length	76.2 mm
Rotor Inertia	Approximately 0.00012 kg·m²
Mounting	IEC Metric Mounting
Connector	SpeedTEC DIN Right-Angle Connector
Connector Rotation	180° Rotatable
Shaft Seal	No Shaft Seal
Motor Construction	Low-Inertia Design
Approximate Motor Weight	5.39 kg
Intended Drive Type	Compatible Servo Drive
Control Mode	Closed-Loop Servo Control
Typical Speed Requirement	High-Speed Motion
Typical Application	Positioning, indexing, packaging, assembly, material handling

The continuous torque rating of approximately 4.18 N·m represents the motor’s ability to provide sustained torque under appropriate operating conditions.

The peak torque capability of approximately 11.1 N·m allows the motor to handle short-duration acceleration and deceleration requirements that are significantly higher than the continuous operating torque.

The approximately 1.8 kW power rating places the motor in a useful range for medium-duty automated machinery. It can be used for axes that require high rotational speed while maintaining a relatively compact motor package.

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4. Dimensions and Mechanical Information

The MPL-B330P-HJ74AA uses a 100 mm frame size with a 76.2 mm magnetic stack length.

Mechanical Parameter	Specification
Model	MPL-B330P-HJ74AA
Frame Size	100 mm
Frame Width Class	100 mm
Magnetic Stack Length	76.2 mm
Magnetic Stack Length in Inches	3.0 in
Shaft Type	Keyed
Mounting Standard	IEC Metric
Flange Configuration	Metric Servo Motor Flange
Mounting Holes	Free Mounting Holes
Connector Position	Right-Angle
Connector Rotation	Approximately 180°
Shaft Seal	None
Approximate Weight	5.39 kg

The 100 mm frame size is one of the main mechanical characteristics of this motor. The frame dimensions provide a practical mounting reference when designing or modifying an automation machine.

The 76.2 mm magnetic stack length corresponds to a 3.0-inch stack length. This is useful when comparing the motor with other motors within the MPL family that use different stack lengths.

The exact overall motor envelope, including the complete shaft projection, connector clearance, brake assembly, and mounting depth, can vary according to the mechanical configuration. For machine redesign or replacement work, the motor’s mechanical drawing should therefore be checked against the available installation space.

The motor’s approximate weight is 5.39 kg, which should be considered when designing mounting brackets, moving axes, robotic structures, vertical mechanisms, and machine frames.

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5. Electrical and Performance Characteristics

The MPL-B330P-HJ74AA is intended for use in a 400 V-class servo system and is designed for high-speed operation.

Its rated speed of approximately 5000 rpm makes it suitable for applications where conventional lower-speed motors may require additional mechanical gearing or where rapid rotary movement is a major part of the machine cycle.

The motor’s low rotor inertia is another important performance characteristic. The approximate rotor inertia is 0.00012 kg·m².

Low rotor inertia reduces the amount of energy required to accelerate the motor rotor. In a properly matched servo system, this allows the motor to respond quickly to commands and makes rapid acceleration and deceleration easier to achieve.

The combination of low rotor inertia, high rated speed, continuous torque, and high peak torque makes the motor suitable for applications with repeated motion cycles.

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6. Feedback System

The MPL-B330P-HJ74AA uses an incremental encoder feedback system with approximately 2000 lines.

Servo feedback is used to determine the motor’s rotational position and speed. The servo drive continuously compares commanded motion with feedback from the motor and adjusts motor current accordingly.

This closed-loop operation is fundamental to servo positioning applications.

Typical benefits include:

• Accurate position control
• Controlled acceleration and deceleration
• Stable speed regulation
• Repeatable indexing
• Rapid correction of motion errors
• Better synchronization between motor and machine mechanism
• Improved response to changing loads

The feedback system should always be matched with the compatible servo drive and motion-control architecture before installation.

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7. Integrated 24 V DC Holding Brake

One of the main characteristics of the MPL-B330P-HJ74AA is its 24 V DC holding brake.

The brake provides mechanical holding capability when the motor is not actively generating torque. This feature is particularly useful for vertical axes and other mechanisms where the machine load should not freely move when motor power is removed.

Typical applications for the brake include:

• Vertical lifting axes
• Z-axis mechanisms
• Ball-screw lifting systems
• Vertical positioning equipment
• Material-handling equipment
• Automated assembly machinery
• Machine mechanisms requiring shaft holding

The brake is primarily a holding device, rather than a substitute for a dedicated dynamic stopping or emergency braking system. Brake control should be designed according to the machine’s safety requirements and the applicable control architecture.

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8. Shaft and Mechanical Coupling

The MPL-B330P-HJ74AA uses a keyed shaft.

A keyed shaft provides a positive mechanical connection between the motor shaft and a compatible coupling, pulley, sprocket, gearbox input, or other rotating component.

This arrangement is commonly used in industrial machinery because it provides a familiar mechanical interface and can simplify coupling selection.

When installing the motor, the coupling should be properly aligned with the motor shaft.

Excessive radial or axial loading should be avoided because unnecessary shaft loading can reduce bearing life and negatively affect positioning performance.

For precision applications, rigid mechanical alignment is especially important because coupling misalignment can introduce vibration, mechanical stress, positioning error, and premature component wear.

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9. Connector Configuration

The motor uses a right-angle SpeedTEC DIN-style connector.

The connector arrangement provides flexibility when routing motor and feedback cables around the machine.

The connector can be rotated through an approximately 180° range, allowing the installer to choose a cable-routing direction that better matches the available cabinet or machine space.

This can be useful in:

• Compact machine frames
• Enclosed automation cells
• Multi-axis machinery
• Robotic equipment
• Packaging machines
• Assembly machines
• Equipment with restricted cable-routing space

Correct connector installation is important because excessive mechanical stress on the connector or cable can result in intermittent electrical faults.

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10. Product Applications

Packaging Machinery

The MPL-B330P-HJ74AA is suitable for packaging machinery requiring fast and repeatable motion.

Packaging machines frequently require rapid indexing, acceleration, deceleration, and synchronization between several machine axes.

The motor’s 5000 rpm rated speed and low rotor inertia make it suitable for high-cycle motion.

Possible applications include:

• Packaging film handling
• Indexing mechanisms
• Product positioning
• Cutting mechanisms
• Sealing mechanisms
• Conveyor synchronization
• Rotary indexing
• Pick-and-place mechanisms

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Assembly Equipment

Automated assembly equipment often requires precise positioning combined with short cycle times.

The motor can be used to drive mechanisms such as:

• Ball screws
• Belt drives
• Rotary tables
• Indexing mechanisms
• Linear actuators
• Tool positioning systems
• Component feeding mechanisms

The closed-loop feedback system allows the servo controller to monitor motor position and speed during operation.

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Material Handling

Material-handling equipment frequently contains axes that must accelerate quickly while maintaining controlled positioning.

The MPL-B330P-HJ74AA can be applied to:

• Transfer mechanisms
• Conveyor drives
• Positioning systems
• Automated loading systems
• Product sorting mechanisms
• Pick-and-place systems

For vertical material-handling applications, the integrated holding brake can provide an additional mechanical holding function when correctly integrated into the machine design.

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Machine Tools

Servo motors are commonly used in machine tools for controlled positioning and feed mechanisms.

The MPL-B330P-HJ74AA can be considered for applications requiring:

• High-speed axis movement
• Repeatable positioning
• Rapid acceleration
• Controlled deceleration
• Closed-loop operation
• Compact motor installation

The final suitability depends on the required load torque, acceleration profile, duty cycle, axis inertia, mechanical transmission, and servo drive configuration.

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Printing and Converting Equipment

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

The motor’s high-speed capability can be useful for:

• Web handling
• Roll positioning
• Feed mechanisms
• Cutting systems
• Indexing systems
• Tension-control mechanisms
• Registration-related motion

The motor should be correctly sized according to the actual load inertia and required acceleration profile.

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Inspection and Automation Systems

Automated inspection equipment often requires precise movement of cameras, fixtures, test heads, or workpieces.

The motor can provide controlled positioning for:

• Inspection tables
• Rotary fixtures
• Linear positioning stages
• Test mechanisms
• Product indexing
• Camera positioning systems

Its low-inertia characteristics are particularly useful when rapid movement and repeated positioning are required.

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11. Advantages of the MPL-B330P-HJ74AA

11.1 High-Speed Operation

The approximately 5000 rpm rated speed allows the motor to support high-speed machine cycles.

This can help reduce mechanical cycle time in suitable applications and can provide additional flexibility when selecting gear ratios and transmission components.

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11.2 Low-Inertia Rotor

The low-inertia rotor is one of the defining characteristics of the MPL family.

Lower rotor inertia can improve dynamic response because less torque is required to accelerate the motor itself.

This is particularly valuable for machines with frequent start-stop cycles.

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11.3 High Peak Torque

The approximately 11.1 N·m peak torque provides substantial short-duration torque capability.

Peak torque is useful during acceleration, deceleration, indexing, and other transient operating conditions.

The actual allowable peak torque duration depends on the drive, operating conditions, motor temperature, duty cycle, and application requirements.

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11.4 Integrated Holding Brake

The 24 V DC holding brake makes the HJ74AA version particularly suitable for applications where shaft holding is required.

This can simplify the mechanical design of certain vertical or gravity-loaded axes.

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11.5 Compact 100 mm Frame

The 100 mm frame provides a relatively compact mechanical package for the motor’s performance class.

This makes the motor suitable for machinery where installation space is limited but a smaller motor does not provide sufficient torque.

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11.6 Encoder Feedback

The incremental encoder provides closed-loop feedback for the servo control system.

This supports accurate position and speed regulation when the motor is correctly paired with the compatible servo drive and control system.

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11.7 Keyed Shaft

The keyed shaft provides a conventional mechanical interface for industrial couplings and transmission components.

This is useful when replacing an existing motor or designing a machine around standard keyed mechanical components.

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11.8 Rotatable Right-Angle Connector

The rotatable right-angle connector gives the installer more flexibility when routing cables.

This can reduce interference with nearby machine components and can make installation easier in compact equipment.

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12. Typical Selection Considerations

When selecting the MPL-B330P-HJ74AA for a machine, several factors should be evaluated.

The required continuous torque should be compared with the motor’s continuous torque rating.

The required acceleration torque should be compared with the available peak torque.

The total reflected load inertia should be considered together with the motor rotor inertia.

The operating speed should remain within the permitted speed range of the complete servo system.

The motor brake should be selected based on the actual holding requirement rather than being treated as a general-purpose stopping device.

Mechanical dimensions should be checked carefully, including:

• Frame dimensions
• Flange dimensions
• Shaft diameter
• Shaft extension
• Key dimensions
• Connector clearance
• Cable-routing space
• Mounting-hole position
• Overall motor length
• Brake clearance

The motor weight should also be included in the structural calculation when the motor is mounted on a moving axis.

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13. Maintenance and Service Considerations

Routine inspection should include the motor housing, mounting hardware, shaft, coupling, cables, connectors, and surrounding machine components.

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

Excessive vibration can indicate coupling misalignment, mechanical looseness, bearing problems, load imbalance, or other machine-related conditions.

The motor shaft and coupling should be inspected periodically.

Mounting bolts should remain properly secured, particularly on machines subject to repeated acceleration and deceleration.

The encoder cable should be routed separately from high-power conductors where required by the machine’s electrical design.

Connector locking mechanisms should be checked to ensure that they remain properly seated.

For applications using the integrated brake, brake operation should be periodically verified.

If the motor is used on a vertical axis, the machine should have appropriate safety provisions so that the load cannot fall if motor power or brake control is lost.

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14. Related and Same-Series Models

The following models are closely related to the MPL-B330P-HJ74AA and are useful when comparing motor configurations within the same product family.

Some suffix differences relate to feedback, brake configuration, connector configuration, winding characteristics, or other ordering options. Exact specifications should therefore be checked against the individual model number before substitution.

Model	Series / Type	Frame / Stack	Rated Speed	Continuous Torque	Peak Torque	Power	Feedback / Brake	Approx. Weight
MPL-B330P-HJ72AA	MPL Low-Inertia Servo	100 mm / 76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	Incremental Encoder / No Holding Brake	Approx. 4.6 kg
MPL-B330P-HJ74AA	MPL Low-Inertia Servo	100 mm / 76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	Incremental Encoder / 24 V DC Brake	Approx. 5.39 kg
MPL-B330P-HK72AA	MPL Low-Inertia Servo	100 mm class	5000 rpm class	4.18 N·m class	11.1 N·m class	1.8 kW class	Encoder / Configuration-dependent	Approx. 5 kg class
MPL-B330P-HK74AA	MPL Low-Inertia Servo	100 mm class	5000 rpm class	4.18 N·m class	11.1 N·m class	1.8 kW class	Encoder / Brake configuration	Approx. 5 kg class
MPL-B420P-HJ74AA	MPL Low-Inertia Servo	100 mm class	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	Encoder / 24 V DC Brake	Approx. 4.3 kg class

The MPL-B330P-HJ72AA is particularly relevant when comparing the same basic motor configuration without the integrated holding-brake option.

The MPL-B420P-HJ74AA is another useful comparison when a higher torque level is required while maintaining a similar high-speed servo concept.

The HK variants can be considered when the machine requires a different motor configuration within the same general MPL-B330P family. Because suffix codes identify specific ordering characteristics, the complete model number should always be matched before replacing one motor with another.

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15. Five Popular Related Models

The following five models provide a broader comparison across the MPL low-inertia servo motor family.

Model	Series	Rated Speed	Continuous Torque	Peak Torque	Rated Power	Rotor Inertia	Approx. Weight
MPL-B310P	MPL Low-Inertia	5000 rpm	1.58 N·m	3.61 N·m	0.77 kW	0.000044 kg·m²	2.7 kg
MPL-B320P	MPL Low-Inertia	5000 rpm	3.05 N·m	7.91 N·m	1.5 kW	0.000078 kg·m²	3.7 kg
MPL-B330P	MPL Low-Inertia	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	0.00012 kg·m²	4.6 kg
MPL-B420P	MPL Low-Inertia	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	0.00026 kg·m²	4.3 kg
MPL-B430P	MPL Low-Inertia	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	0.00038 kg·m²	5.5 kg

The MPL-B310P is a smaller option for applications with lower torque requirements. It provides the same general high-speed, low-inertia servo concept while using a smaller motor package.

The MPL-B320P provides a step up in torque and power and can be considered for applications where the B310P class is insufficient.

The MPL-B330P represents the performance class of the HJ74AA motor and provides a useful combination of 5000 rpm operation, 4.18 N·m continuous torque, and 11.1 N·m peak torque.

The MPL-B420P provides slightly higher continuous and peak torque capability while retaining high-speed operation.

The MPL-B430P provides a further increase in torque capability and can be considered for applications requiring greater acceleration torque or a larger continuous load.

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16. Five Same-Brand Popular Servo Motor Models

The following models are useful for comparison when selecting other motors from the same brand and the broader industrial servo-motion product range.

Model	Product Type	Typical Voltage Class	Rated Speed / Class	Continuous Torque / Class	Rated Power / Class	Feedback	Approx. Weight
MPL-B310P	Low-Inertia Servo Motor	400 V class	5000 rpm	1.58 N·m	0.77 kW	Incremental Encoder	2.7 kg
MPL-B320P	Low-Inertia Servo Motor	400 V class	5000 rpm	3.05 N·m	1.5 kW	Incremental Encoder	3.7 kg
MPL-B330P-HJ74AA	Low-Inertia Servo Motor	400 V class	5000 rpm	4.18 N·m	1.8 kW	Incremental Encoder + Brake	5.39 kg
MPL-B430P	Low-Inertia Servo Motor	400 V class	5000 rpm	6.55 N·m	2.2 kW	Encoder	5.5 kg
MPL-B4540F	Low-Inertia Servo Motor	400 V class	3000 rpm class	10.2 N·m	2.6 kW	Encoder	8.6 kg

These models cover a range of torque and power requirements and can be useful when evaluating whether the MPL-B330P-HJ74AA is appropriately sized for a particular machine.

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17. Performance Comparison Within the MPL Family

The MPL family offers several motor sizes and torque levels.

Model	Rated Speed	Continuous Torque	Peak Torque	Power	Rotor Inertia	Weight
MPL-B310P	5000 rpm	1.58 N·m	3.61 N·m	0.77 kW	0.000044 kg·m²	2.7 kg
MPL-B320P	5000 rpm	3.05 N·m	7.91 N·m	1.5 kW	0.000078 kg·m²	3.7 kg
MPL-B330P	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	0.00012 kg·m²	4.6 kg
MPL-B420P	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	0.00026 kg·m²	4.3 kg
MPL-B430P	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	0.00038 kg·m²	5.5 kg
MPL-B4530F	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	2.1 kW	—	7.3 kg
MPL-B4540F	3000 rpm	Approx. 10.2 N·m	Approx. 27.1 N·m	2.6 kW	—	8.6 kg
MPL-B4560F	3000 rpm	Approx. 14.1 N·m	Approx. 34.4 N·m	3.2 kW	—	11.82 kg

This comparison shows the position of the B330P motor within the broader MPL family.

The B330P provides considerably more torque than the B310P and B320P while remaining a relatively compact high-speed motor.

The B420P and B430P move toward higher torque requirements.

The larger B4530F, B4540F, and B4560F models are more appropriate for applications where continuous torque and peak torque requirements exceed the capability of the smaller high-speed motor classes.

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18. Typical Machine Configurations

The MPL-B330P-HJ74AA can be incorporated into several common mechanical arrangements.

Ball-Screw Axis

The motor can be connected to a ball screw through a suitable servo coupling.

This configuration is commonly used for precision linear positioning.

The motor provides rotary motion while the ball screw converts the rotation into linear movement.

For this configuration, the designer should consider screw pitch, required linear speed, acceleration, load mass, friction, screw efficiency, reflected inertia, and required positioning accuracy.

Belt-Driven Axis

A timing belt and pulley arrangement can be used when a longer travel distance or flexible mechanical layout is required.

The motor’s high-speed capability can provide rapid linear movement when the pulley ratio and belt speed are correctly selected.

Rotary Indexing Mechanism

The motor can drive a rotary indexing mechanism directly or through a gearbox.

The low-inertia design is useful for applications involving frequent starts, stops, and reversals.

Vertical Axis

The HJ74AA brake makes the motor suitable for certain vertical-axis applications.

The brake can provide holding capability when correctly controlled.

However, the complete machine should still incorporate appropriate safety measures for gravity-loaded systems.

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19. Advantages for Machine Builders

For machine builders, the MPL-B330P-HJ74AA provides several practical characteristics.

Its 100 mm frame gives designers a relatively compact mounting envelope compared with larger servo motor classes.

The 5000 rpm rated speed can reduce the need for excessive mechanical gearing in some applications.

The low-inertia rotor can improve response during repeated acceleration and deceleration.

The encoder provides closed-loop feedback for servo positioning.

The integrated 24 V DC brake adds functionality for holding applications.

The keyed shaft simplifies integration with common mechanical transmission components.

The rotatable right-angle connector can make cable routing easier in compact machine designs.

The combination of these features makes the motor suitable for general industrial automation where both dynamic response and reliable positioning are required.

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20. Recommended Application Conditions

The motor is particularly well suited to applications with one or more of the following characteristics:

Application Requirement	Suitability
High-speed rotary motion	Very suitable
Rapid acceleration	Suitable
Frequent start/stop operation	Suitable
Repeated indexing	Suitable
Closed-loop positioning	Suitable
Medium-power machine axis	Suitable
Compact machine construction	Suitable
Vertical holding requirement	Suitable with brake
Ball-screw positioning	Suitable
Belt-driven positioning	Suitable
Rotary indexing	Suitable
Automated assembly	Suitable
Packaging machinery	Suitable
Material handling	Suitable
Inspection equipment	Suitable

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21. Important Replacement Considerations

When replacing another motor with the MPL-B330P-HJ74AA, the replacement should not be selected solely according to rated power.

The following characteristics should be checked:

1. Motor voltage class
2. Servo drive compatibility
3. Continuous torque
4. Peak torque
5. Rated speed
6. Maximum operating speed
7. Rotor inertia
8. Load inertia
9. Encoder type
10. Brake requirement
11. Shaft diameter
12. Shaft extension
13. Key dimensions
14. Flange dimensions
15. Mounting-hole pattern
16. Overall motor length
17. Connector orientation
18. Connector clearance
19. Cable requirements
20. Motor weight
21. Machine duty cycle
22. Acceleration and deceleration profile
23. Ambient temperature
24. Required protection level
25. Vertical-axis safety requirements

A motor with the same power rating is not necessarily a direct replacement.

The feedback configuration, brake configuration, mechanical mounting dimensions, shaft arrangement, and drive compatibility must also match the application.

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22. Product Summary

Category	MPL-B330P-HJ74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Low-Inertia Brushless Servo Motor
Frame	100 mm
Stack Length	76.2 mm
Rated Speed	5000 rpm
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Power	Approx. 1.8 kW
Feedback	2000-line Incremental Encoder
Brake	24 V DC Holding Brake
Shaft	Keyed
Connector	Right-Angle SpeedTEC DIN
Connector Rotation	Approximately 180°
Rotor Inertia	Approx. 0.00012 kg·m²
Approx. Weight	5.39 kg
Main Application	Industrial Motion Control
Typical Machines	Packaging, Assembly, Material Handling, Machine Tools, Inspection, Indexing
Main Performance Characteristic	High-Speed, Low-Inertia Servo Operation

The MPL-B330P-HJ74AA is a 100 mm-frame, high-speed low-inertia servo motor with approximately 1.8 kW rated power, 4.18 N·m continuous torque, 11.1 N·m peak torque, and 5000 rpm rated speed.

Its 24 V DC holding brake distinguishes it from non-brake variants and makes it particularly useful for applications where the motor shaft must remain mechanically held during certain machine states.

The combination of low rotor inertia, high-speed operation, encoder feedback, keyed shaft construction, compact frame size, and integrated holding brake makes this motor suitable for a broad range of industrial automation and motion-control applications.

For engineering replacement or new machine design, the most important selection factors are the actual load torque, peak acceleration torque, load inertia, operating speed, duty cycle, mechanical dimensions, feedback configuration, brake requirements, and compatible servo drive.