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Allen-Bradley MPL-B330P-SK72AA Low-Inertia Servo Motor – Complete Technical Description

1. Product Overview

The Allen-Bradley MPL-B330P-SK72AA is a high-performance low-inertia brushless rotary servo motor designed for industrial motion-control applications requiring high rotational speed, accurate positioning, fast acceleration, and stable dynamic response.

It belongs to the MPL low-inertia servo motor series and uses a permanent-magnet motor construction. The motor is designed for use with compatible servo drives in high-performance motion systems where repeatability, acceleration response, and precise speed control are important.

The MPL-B330P-SK72AA uses a 100 mm IEC metric frame, a 76.2 mm (3.0 in.) magnet stack, and a rated speed of 5000 RPM. Its feedback system is a single-turn high-resolution encoder, while the shaft configuration is keyless and the motor is supplied without a holding brake.

The model also uses a right-angle SpeedTEC DIN connector with 180-degree rotational capability, allowing the connector orientation to be adapted to the available space around the motor and machine structure.

This configuration is particularly suitable for machinery where compact construction, high speed, low rotor inertia, and precise servo control are more important than having an integrated mechanical brake.

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2. Brand Information

Parameter	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Product Type	Rotary Servo Motor
Motor Construction	Brushless Permanent-Magnet Servo Motor
Model	MPL-B330P-SK72AA
Voltage Class	400 V class
Operating Voltage	460 V AC
Frame Size	100 mm
Magnet Stack	76.2 mm / 3.0 in.
Rated Speed	5000 RPM
Feedback	Single-turn high-resolution encoder
Shaft	Keyless shaft extension
Brake	No brake
Connector	SpeedTEC DIN, right-angle
Mounting	IEC metric flange
Duty	Continuous servo motion applications

The product is part of the MP-Series MPL low-inertia brushless servo motor family. The manufacturer identifies this exact model as a 460 V AC rotary servo motor with a 100 mm frame and 76.2 mm magnet stack.

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3. Product Series

MPL Low-Inertia Servo Motor Series

The MPL series is a family of compact, high-speed permanent-magnet servo motors intended for demanding industrial motion-control systems.

The defining characteristic of this family is its low-inertia rotor design. Low rotor inertia allows the motor to accelerate and decelerate rapidly, which is important when a machine repeatedly starts, stops, reverses direction, or changes speed.

The MPL-B330P-SK72AA is positioned in the 100 mm frame class and uses the 30-stack configuration, corresponding to a 76.2 mm magnet stack length.

The B330P motor size provides a useful combination of speed, torque, and mechanical compactness for medium-duty servo axes.

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4. Model Number Interpretation

The model number can be interpreted as follows:

Model Code	Meaning
MPL	MPL low-inertia brushless servo motor family
B	400 V-class motor configuration
3	100 mm frame size
30	76.2 mm / 3.0 in. magnet stack
P	5000 RPM rated-speed configuration
S	Single-turn high-resolution encoder
K	Keyless shaft extension
7	SpeedTEC DIN connector, right-angle, rotatable
2	No brake
AA	Standard factory configuration

The exact product configuration is identified by the complete part number rather than by the base motor family alone.

This is important because two motors from the same MPL family may have the same frame and stack dimensions while using different feedback devices, shaft configurations, or brake options.

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5. Main Technical Specifications

Parameter	MPL-B330P-SK72AA Specification
Model	MPL-B330P-SK72AA
Brand	Allen-Bradley
Series	MPL Low-Inertia Servo Motor
Motor Type	Brushless AC permanent-magnet servo motor
Voltage Class	400 V class
Rated Voltage	460 V AC
Phase	3-phase
Frame Size	100 mm
Frame Number	Frame 3
Magnet Stack Length	76.2 mm / 3.0 in.
Rated Speed	5000 RPM
Maximum Speed	5000 RPM
Continuous Torque	4.18 Nm
Peak Torque	11.1 Nm
Continuous Rated Power	1.8 kW
Rotor Inertia	0.00012 kg·m²
Feedback	Single-turn high-resolution encoder
Encoder Resolution	1024 Sin/Cos cycles/rev
Feedback Protocol	Hiperface
Shaft Type	Keyless shaft extension
Shaft Seal	No shaft seal
Brake	No brake
Connector	SpeedTEC DIN
Connector Orientation	Right-angle, 180° rotatable
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Approximate Motor Weight	4.6 kg
Approximate Shipping Weight	About 6 kg
Dimensions	100 mm frame; 76.2 mm magnet stack; complete envelope depends on mechanical configuration
Operating Temperature Reference	Up to approximately 40 °C
Enclosure / Protection	Configuration-dependent; verify installation documentation for final protection requirements

The B330P family is specified at 4.18 Nm continuous torque, 11.1 Nm peak torque, 1.8 kW continuous rated power, and 0.00012 kg·m² rotor inertia. Published product data also lists approximately 4.6 kg motor weight for this configuration.

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6. Dimensions and Mechanical Characteristics

The MPL-B330P-SK72AA uses a 100 mm frame size and a 76.2 mm magnet stack.

The 100 mm figure refers to the IEC frame-size class and should not be interpreted as the complete outside length of the assembled motor.

Similarly, the 76.2 mm value describes the motor’s magnet stack length rather than the total motor envelope.

Mechanical Parameter	Specification
Model	MPL-B330P-SK72AA
IEC Frame Size	100 mm
Frame Designation	Frame 3
Magnet Stack Length	76.2 mm
Magnet Stack	3.0 in.
Mounting Standard	IEC Metric
Shaft Configuration	Keyless
Shaft Seal	No shaft seal
Brake	None
Connector	Right-angle SpeedTEC DIN
Connector Rotation	180°
Motor Weight	Approximately 4.6 kg
Shipping Weight	Approximately 6 kg
Overall Housing Dimensions	Configuration-dependent
Mounting Envelope	100 mm frame class

The exact dimensional drawing should be used when determining the required machine mounting space, shaft clearance, cable bend radius, and connector clearance.

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7. Motor Performance

The MPL-B330P-SK72AA is rated for 5000 RPM, making it suitable for applications where rapid rotary motion is required.

Its continuous torque rating is approximately 4.18 Nm, while the published peak torque value for the B330P configuration is approximately 11.1 Nm. The continuous rated output is approximately 1.8 kW.

The relatively low rotor inertia is one of the most important characteristics of the motor.

A low-inertia motor can change speed rapidly because less rotational energy is stored in the rotor. In a properly tuned servo system, this can improve acceleration and deceleration response and reduce the time required for repetitive positioning operations.

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8. Feedback System

The MPL-B330P-SK72AA uses a single-turn high-resolution encoder.

Published technical information identifies the feedback as a 1024 Sin/Cos cycles-per-revolution absolute single-turn encoder using Hiperface protocol.

This feedback arrangement allows the servo drive to receive high-resolution position information from the motor.

For applications involving frequent positioning, speed changes, synchronization, electronic gearing, indexing, or coordinated motion, accurate feedback is essential because the servo controller uses feedback information to continuously regulate motor position and speed.

The single-turn configuration is particularly appropriate where the control architecture requires accurate position information within one mechanical revolution rather than multi-turn absolute position tracking.

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9. Keyless Shaft Configuration

One of the defining characteristics of the MPL-B330P-SK72AA is its keyless shaft extension.

Unlike a keyed shaft, a keyless shaft does not use a conventional shaft key and keyway for torque transmission.

This can be advantageous in applications where a suitable clamping hub, coupling, or other precision shaft connection is used.

A keyless connection can provide a clean mechanical interface and can be useful where shaft concentricity, assembly flexibility, and compact mechanical integration are important.

The exact coupling or hub selected for the application must be capable of handling the motor’s continuous and peak torque as well as the required operating speed.

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10. No-Brake Configuration

The MPL-B330P-SK72AA is supplied without an integrated holding brake.

This makes the model particularly appropriate for applications where a mechanical holding brake is not required.

A no-brake configuration can also reduce mechanical complexity and motor weight compared with an otherwise similar motor equipped with an integrated brake.

However, a servo motor without a brake should not automatically be treated as a load-holding device.

If the machine axis must remain mechanically stationary after power removal, especially on vertical or gravity-loaded axes, the machine designer may need a separate mechanical holding solution.

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11. SpeedTEC DIN Connector

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

The connector can be rotated through approximately 180 degrees, providing additional flexibility when routing motor cables.

This is useful in compact machine assemblies where a fixed connector direction could interfere with covers, cable trays, neighboring components, or machine guarding.

The connector design also helps maintain a consistent motor-cable interface within compatible motion-control installations.

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12. Mounting

The MPL-B330P-SK72AA uses an IEC metric mounting arrangement.

The 100 mm frame size provides a standardized mechanical class that can simplify integration into industrial machinery.

The mounting surface should be rigid and properly aligned.

Improper mounting can create shaft misalignment, additional bearing loading, vibration, and unnecessary mechanical stress.

The motor should be mounted according to the applicable mechanical installation requirements, with particular attention to coupling alignment and permissible radial and axial loads.

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13. Applications

The MPL-B330P-SK72AA can be used in a wide range of industrial motion-control systems.

Typical applications include:

Packaging Machinery

Packaging equipment frequently requires rapid acceleration, precise indexing, synchronized movement, and repetitive positioning.

A 5000 RPM servo motor with low rotor inertia is well suited to applications such as indexing mechanisms, feeders, rotary positioning systems, sealing mechanisms, and synchronized packaging axes.

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Material Handling

The motor can be used for controlled conveyor movement, indexing, positioning, transfer mechanisms, and other material-handling equipment.

Servo control allows the machine to control acceleration, deceleration, speed, and position more precisely than a basic fixed-speed motor.

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Machine Tools

The high-speed characteristics and feedback system make this type of motor suitable for various machine-tool auxiliary axes and precision positioning mechanisms.

Applications may include feed mechanisms, indexing systems, tool positioning, and other controlled rotary axes.

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Electronic Assembly Equipment

Electronic manufacturing machinery often requires accurate and repeatable motion.

The low-inertia motor configuration can be useful for pick-and-place mechanisms, indexing equipment, positioning systems, and assembly automation where rapid motion changes are common.

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Printing and Converting Equipment

Web-handling, converting, feeding, and positioning systems often require accurate synchronization between multiple axes.

Servo motors can provide controlled speed and position relationships between shafts and mechanical sections.

The MPL-B330P-SK72AA can be considered for applications where the required torque and speed fall within its operating range.

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Robotics and Automated Machinery

Servo motors are widely used in robotic and automated mechanisms because they allow closed-loop control of position and velocity.

The B330P motor size can be appropriate for medium-sized rotary axes, auxiliary mechanisms, positioning stages, and other automated equipment.

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Textile and Web-Processing Equipment

High-speed controlled rotation is important in many textile and web-processing machines.

The 5000 RPM rating and low-inertia design can be advantageous for applications requiring frequent speed changes and coordinated movement.

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14. Main Advantages

14.1 Low-Inertia Rotor

The low-inertia design is one of the primary advantages of the MPL series.

Lower rotor inertia allows the motor to respond quickly to changes in commanded speed.

This is especially useful in machines with frequent acceleration and deceleration cycles.

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14.2 High-Speed Operation

The motor is rated at 5000 RPM.

This makes it suitable for applications where a high mechanical speed is required while maintaining closed-loop servo control.

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14.3 High-Resolution Feedback

The single-turn high-resolution encoder provides detailed position feedback to the servo control system.

This supports accurate positioning, speed regulation, synchronization, and motion coordination.

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14.4 Compact 100 mm Frame

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

For machine builders, compact motor packaging can help reduce cabinet-to-machine interface space and simplify mechanical layout.

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14.5 Keyless Shaft

The keyless shaft provides an alternative mechanical coupling arrangement for applications using clamping hubs or compatible precision couplings.

This can be useful when a smooth shaft interface is preferred.

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14.6 No-Brake Design

The absence of an integrated brake simplifies the motor configuration where a holding brake is not needed.

It can also reduce mechanical complexity compared with a brake-equipped equivalent.

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14.7 Rotatable Right-Angle Connector

The 180-degree rotatable connector gives machine designers more freedom when routing cables.

This is particularly useful in compact machinery where connector orientation can otherwise become a mechanical constraint.

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15. Important Selection Considerations

Before selecting the MPL-B330P-SK72AA for a machine, several factors should be checked.

The first consideration is the required continuous torque.

The motor provides approximately 4.18 Nm continuous torque, so the application’s continuous operating torque should remain within the allowable motor and drive operating envelope.

The second consideration is peak torque.

The published B330P family peak torque is approximately 11.1 Nm, but peak torque capability depends on the complete motor-drive combination and operating conditions.

The third consideration is motor speed.

The motor is designed for operation up to approximately 5000 RPM, so the application should be evaluated for the required speed range, acceleration profile, load inertia, and mechanical transmission ratio.

The fourth consideration is feedback compatibility.

The single-turn high-resolution encoder must be compatible with the selected servo drive and control architecture.

The fifth consideration is the absence of a brake.

For vertical axes or loads that must remain mechanically stationary after power removal, the machine may require an external holding mechanism.

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16. Detailed Technical Parameter Table

Category	Parameter	Specification
Identification	Model	MPL-B330P-SK72AA
Identification	Brand	Allen-Bradley
Identification	Product Family	MP-Series
Identification	Product Series	MPL Low-Inertia Servo Motors
Motor	Motor Type	Brushless permanent-magnet rotary servo motor
Motor	Voltage Class	400 V class
Motor	Rated Voltage	460 V AC
Motor	Phase	3-phase
Motor	Rated Speed	5000 RPM
Motor	Maximum Speed	5000 RPM
Motor	Continuous Torque	4.18 Nm
Motor	Peak Torque	11.1 Nm
Motor	Continuous Power	1.8 kW
Motor	Rotor Inertia	0.00012 kg·m²
Mechanical	Frame Size	100 mm
Mechanical	Frame Number	Frame 3
Mechanical	Magnet Stack	76.2 mm / 3.0 in.
Mechanical	Shaft	Keyless shaft extension
Mechanical	Shaft Seal	No shaft seal
Mechanical	Mounting	IEC metric flange
Mechanical	Brake	No brake
Feedback	Encoder	Single-turn high-resolution encoder
Feedback	Resolution	1024 Sin/Cos cycles/rev
Feedback	Protocol	Hiperface
Connection	Connector	SpeedTEC DIN
Connection	Connector Style	Right-angle
Connection	Connector Rotation	180° rotatable
Protection	Enclosure	Application/configuration dependent
Environment	Operating Temperature Reference	Up to approximately 40 °C
Physical	Motor Weight	Approximately 4.6 kg
Physical	Shipping Weight	Approximately 6 kg
Physical	Frame Dimension	100 mm
Physical	Stack Dimension	76.2 mm
Physical	Complete Envelope	Refer to mechanical drawing for final installation dimensions

The B330P family values of 4.18 Nm continuous torque, 11.1 Nm peak torque, 1.8 kW output, 0.00012 kg·m² rotor inertia, and approximately 4.6 kg motor weight are consistent with published selection data.

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17. Five Related Models in the Same Series

The following models are useful comparison points within the MPL low-inertia servo motor family.

Model	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback / Shaft	Brake	Approx. Weight
MPL-B310P	100 mm class / shorter stack	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	Low-inertia servo configuration	Configuration-dependent	2.7 kg
MPL-B320P	100 mm class / intermediate stack	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	Low-inertia servo configuration	Configuration-dependent	3.7 kg
MPL-B330P	100 mm / 76.2 mm stack	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	High-resolution feedback configuration	Configuration-dependent	4.6 kg
MPL-B420P	Larger frame / comparable high-speed class	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	Low-inertia servo configuration	Configuration-dependent	4.3 kg
MPL-B430P	Larger frame / longer stack	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	Low-inertia servo configuration	Configuration-dependent	5.5 kg

The B-series comparison data shows the progression from B310P through B430P in torque and power while retaining 5000 RPM operation in these configurations.

MPL-B310P

The MPL-B310P is a smaller-output member of the same low-inertia family.

With approximately 1.58 Nm continuous torque and 0.77 kW output, it is suitable for applications requiring less motor torque than the B330P.

Its approximate weight is 2.7 kg.

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MPL-B320P

The MPL-B320P increases the available torque and output compared with the B310P.

Its published continuous torque is approximately 3.05 Nm, with 7.91 Nm peak torque and approximately 1.5 kW output.

Its approximate weight is 3.7 kg.

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MPL-B330P

The MPL-B330P is the base motor family corresponding to the SK72AA configuration.

It provides approximately 4.18 Nm continuous torque, 11.1 Nm peak torque, 1.8 kW output, and 5000 RPM.

Its approximate motor weight is 4.6 kg.

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MPL-B420P

The MPL-B420P provides approximately 4.74 Nm continuous torque and 13.5 Nm peak torque.

Its continuous output is approximately 1.9 kW and its published weight is approximately 4.3 kg.

This model can be considered where somewhat higher torque capability is required while maintaining high-speed servo operation.

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MPL-B430P

The MPL-B430P increases the available torque to approximately 6.55 Nm continuous and 19.8 Nm peak.

It provides approximately 2.2 kW continuous output and has a published weight of approximately 5.5 kg.

This makes it a useful comparison for applications requiring more torque than the B330P.

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18. Five Same-Brand Representative Models for Comparison

For a second group of same-brand models, the following representative servo motors are useful when comparing different output levels within the same general motion-control product family.

Model	Product Type	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Approx. Weight
MPL-B310P	Low-inertia servo motor	100 mm class	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	2.7 kg
MPL-B320P	Low-inertia servo motor	100 mm class	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	3.7 kg
MPL-B420P	Low-inertia servo motor	Larger frame class	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	4.3 kg
MPL-B430P	Low-inertia servo motor	Larger frame class	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	5.5 kg
MPL-B4530F	Low-inertia servo motor	Larger frame / longer stack	3000 RPM	8.36 Nm	20.3 Nm	2.1 kW	7.3 kg

These models represent different motor sizes and output levels within the same manufacturer’s servo-motor portfolio. Published selection data lists the B4530F at approximately 8.36 Nm continuous torque, 20.3 Nm peak torque, 2.1 kW output, 3000 RPM, and 7.3 kg.

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19. MPL-B330P-SK72AA Compared with Brake Version

One of the most useful comparisons is between the no-brake SK72AA configuration and a comparable brake-equipped configuration.

Feature	MPL-B330P-SK72AA	Comparable Brake Configuration
Feedback	Single-turn high-resolution	Can be configured similarly
Shaft	Keyless	Depends on model suffix
Brake	No brake	24 V DC brake
Speed	5000 RPM	Generally similar base motor speed
Frame	100 mm	100 mm
Stack	76.2 mm	76.2 mm
Continuous Torque	4.18 Nm	Approximately same base B330P class
Power	1.8 kW	Approximately same base B330P class
Main Difference	Simpler no-brake construction	Mechanical holding capability

The no-brake version is generally more appropriate when the axis does not need an integrated holding brake.

A brake-equipped configuration should be considered when the machine requires a dedicated motor-mounted holding function, subject to the exact mechanical and safety requirements of the application.

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20. MPL-B330P-SK72AA vs. Keyed-Shaft Version

The SK72AA uses a keyless shaft, while other B330P configurations can use different shaft arrangements.

Feature	MPL-B330P-SK72AA	Keyed-Shaft B330P Configuration
Shaft	Keyless	Keyed
Motor Size	B330P	B330P
Frame	100 mm	100 mm
Stack	76.2 mm	76.2 mm
Speed	5000 RPM	5000 RPM
Feedback	Single-turn high-resolution	Configuration-dependent
Brake	No brake	Configuration-dependent
Coupling Method	Clamping / compatible keyless coupling	Keyed coupling
Primary Selection Factor	Mechanical coupling requirement	Mechanical coupling requirement

The choice between keyed and keyless shaft configurations should be based primarily on the machine’s mechanical coupling design rather than simply on motor electrical performance.

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21. Servo Drive Compatibility

The motor should always be matched with a compatible servo drive.

Published technical information lists the B330P family with compatibility across several generations of servo-drive systems, including Kinetix and other compatible motion-control platforms.

The final drive selection should consider:

• Motor voltage class
• Continuous current
• Peak current
• Encoder feedback compatibility
• Required speed
• Required continuous torque
• Required peak torque
• Regenerative energy
• Control architecture
• Communication network
• Cable and connector configuration

A servo motor should not be selected based only on horsepower or RPM.

The motor and drive form a combined motion-control system, and the drive must be capable of correctly controlling the specific motor feedback and electrical characteristics.

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22. Application Selection Guide

Application	Suitability	Main Reason
Packaging machinery	High	High-speed repetitive motion
Indexing systems	High	Low-inertia acceleration
Material handling	High	Precise speed and position control
Electronic assembly	High	High-resolution feedback
Machine automation	High	Closed-loop motion
Printing/converting	High	Synchronization and speed control
Textile machinery	High	High-speed rotary motion
Robotics	Application-dependent	Depends on axis torque and inertia
Vertical axis	Requires additional evaluation	No integrated brake
Heavy-load axis	Requires sizing study	Torque and inertia must be checked
Simple fixed-speed motor replacement	Generally not the primary purpose	Servo drive required

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23. Installation Considerations

Correct installation is important for achieving the expected performance from a servo motor.

The motor mounting flange should be securely fastened to a rigid machine structure.

Shaft alignment should be checked carefully before coupling the motor to the driven machine.

Excessive shaft misalignment can cause increased bearing loads, vibration, mechanical noise, and premature component wear.

The motor cable should also be routed so that the connector is not subjected to excessive mechanical stress.

Because the SK72AA has a right-angle connector with rotational adjustment, the connector should be positioned to provide a clean cable path without placing unnecessary force on the connection.

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24. Thermal Considerations

Servo motors generate heat during operation.

The actual temperature of the motor depends on several factors, including continuous torque, duty cycle, ambient temperature, installation orientation, surrounding airflow, machine structure, and operating speed.

A motor operating near its continuous torque limit for extended periods can generate considerably more heat than one operating under a lighter duty cycle.

For this reason, continuous torque and RMS torque should be evaluated rather than selecting the motor based only on short-duration peak torque.

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25. Maintenance

A properly installed servo motor generally requires relatively little routine maintenance.

However, the following inspection items are recommended as part of normal machine maintenance:

• Check motor mounting bolts.
• Inspect the motor connector.
• Inspect cable routing.
• Check for abnormal vibration.
• Check for unusual bearing noise.
• Inspect the shaft coupling.
• Check for excessive shaft movement.
• Monitor motor temperature.
• Inspect surrounding machine components for mechanical interference.
• Verify feedback stability during machine operation.

If abnormal vibration or temperature is detected, the motor should not simply be replaced without investigating the cause.

Mechanical imbalance, coupling misalignment, excessive load, bearing problems, incorrect servo tuning, or cable/feedback problems can all produce symptoms that appear to be motor failures.

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26. Servo Tuning Considerations

Because the MPL-B330P-SK72AA is a low-inertia motor, servo tuning should take the motor-to-load inertia relationship into account.

A machine with a very large reflected load inertia can behave differently from a machine with a low-inertia load.

The mechanical transmission ratio also affects the inertia reflected back to the motor.

Correct tuning can improve:

• Positioning accuracy
• Acceleration response
• Settling time
• Speed stability
• Vibration performance
• Overshoot control
• Repetitive positioning

The best servo tuning parameters depend on the actual mechanical system and should be established during machine commissioning.

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27. Why the MPL-B330P-SK72AA Is Suitable for High-Speed Motion

The combination of 5000 RPM speed, 4.18 Nm continuous torque, 1.8 kW output, low rotor inertia, and high-resolution feedback gives this motor a balanced specification for many medium-sized industrial servo axes.

The motor is not simply designed to rotate at high speed.

Its main purpose is to provide controlled rotary motion under closed-loop feedback.

This allows the servo drive to command acceleration, deceleration, speed, and position according to the requirements of the machine.

For applications with repetitive motion cycles, this can be more important than simply selecting a motor with a larger nominal power rating.

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28. Key Benefits at a Glance

Benefit	Description
High Speed	5000 RPM rating for high-speed rotary applications
Low Inertia	Fast acceleration and deceleration response
High Feedback Resolution	Suitable for precise closed-loop motion
Compact Frame	100 mm frame provides a practical machine footprint
1.8 kW Output	Suitable for medium-duty servo applications
4.18 Nm Continuous Torque	Useful continuous torque capacity
11.1 Nm Peak Torque	Provides additional short-duration acceleration capability
Keyless Shaft	Flexible coupling options
No Brake	Simple motor configuration where holding brake is unnecessary
Rotatable Connector	Easier cable routing in compact machines
IEC Metric Mounting	Standardized mechanical mounting concept

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29. Quick Technical Reference

Item	Value
Model	MPL-B330P-SK72AA
Brand	Allen-Bradley
Series	MPL Low-Inertia Servo Motors
Motor Type	Brushless permanent-magnet servo motor
Voltage	460 V AC
Frame	100 mm
Stack	76.2 mm / 3.0 in.
Rated Speed	5000 RPM
Continuous Torque	4.18 Nm
Peak Torque	11.1 Nm
Rated Power	1.8 kW
Rotor Inertia	0.00012 kg·m²
Feedback	Single-turn high-resolution encoder
Encoder	1024 Sin/Cos cycles/rev
Protocol	Hiperface
Shaft	Keyless
Brake	None
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Motor Weight	Approximately 4.6 kg
Shipping Weight	Approximately 6 kg
Frame Dimension	100 mm
Magnet Stack Dimension	76.2 mm
Full Mechanical Envelope	Configuration-dependent

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30. Recommended Models Summary

Same-Series / Closely Related Models

Model	Speed	Continuous Torque	Peak Torque	Power	Weight
MPL-B310P	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	2.7 kg
MPL-B320P	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	3.7 kg
MPL-B330P	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	4.6 kg
MPL-B420P	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	4.3 kg
MPL-B430P	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	5.5 kg

These values illustrate the progression of the B-series motor sizes and output ratings.

Same-Brand Representative Models

Model	Type	Speed	Continuous Torque	Peak Torque	Power	Weight
MPL-B310P	Low-inertia servo	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	2.7 kg
MPL-B320P	Low-inertia servo	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	3.7 kg
MPL-B420P	Low-inertia servo	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	4.3 kg
MPL-B430P	Low-inertia servo	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	5.5 kg
MPL-B4530F	Low-inertia servo	3000 RPM	8.36 Nm	20.3 Nm	2.1 kW	7.3 kg

The B4530F provides higher torque while operating at a lower 3000 RPM rated speed, making it a useful comparison when torque is more important than maximum rotational speed.

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31. Final Product Description

The MPL-B330P-SK72AA is a 460 V AC, 5000 RPM, low-inertia brushless servo motor designed for industrial motion-control systems requiring fast dynamic response and accurate closed-loop operation.

Its 100 mm frame and 76.2 mm magnet stack provide a compact mechanical format, while the B330P motor configuration delivers approximately 4.18 Nm continuous torque, 11.1 Nm peak torque, and 1.8 kW continuous output.

The motor uses a single-turn high-resolution encoder for position and speed feedback, allowing the associated servo control system to regulate motion accurately.

The keyless shaft configuration provides flexibility for compatible coupling systems, while the absence of an integrated brake keeps the motor configuration relatively simple for applications where mechanical holding is not required.

The right-angle SpeedTEC DIN connector can be rotated through approximately 180 degrees, providing useful flexibility for cable routing and machine integration.

Overall, the MPL-B330P-SK72AA is well suited to packaging machinery, material handling, indexing systems, electronic assembly equipment, printing and converting machinery, machine automation, and other applications requiring high-speed, precise, repeatable rotary motion.

When selecting this motor for a new installation or replacement, the most important items to verify are the required continuous and peak torque, motor speed, load inertia, feedback compatibility, servo-drive compatibility, shaft coupling method, mounting dimensions, cable arrangement, thermal conditions, and whether the machine requires a mechanical holding brake.

The MPL-B330P-SK72AA is therefore best understood as a compact, high-speed, low-inertia servo motor configuration intended for precise industrial motion rather than as a general-purpose AC motor.