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Allen-Bradley MPL-B580J-SJ74AA Servo Motor – Detailed Specifications, Product Introduction, Applications and Model Selection Guide

1. Product Overview

The Allen-Bradley MPL-B580J-SJ74AA is a high-performance low-inertia brushless AC rotary servo motor designed for demanding industrial motion-control applications.

It belongs to the MP-Series MPL Low-Inertia Brushless Servo Motor family and is intended for applications where accurate positioning, rapid acceleration and deceleration, high torque output, and dependable closed-loop feedback are required.

The motor uses a 460 V AC class power configuration, a 165 mm frame, and a 203.2 mm magnet-stack length. It is a high-speed servo motor with a 3750 RPM rated speed class and a maximum operating speed commonly specified around 3800 RPM.

One of the defining characteristics of this model is its single-turn high-resolution absolute encoder. The feedback system provides precise rotor-position information to the servo system, allowing the motor to follow commanded position, speed, and torque profiles accurately.

The motor also includes a 24 V DC holding brake, which makes it particularly useful for applications where the shaft needs to be mechanically held after servo power is removed.

The shaft uses a keyed shaft extension, providing a conventional mechanical connection for couplings, pulleys, gear mechanisms, and other machine-drive components.

Another practical feature is the right-angle SpeedTEC DIN connector, which can be rotated through 180 degrees. This gives machine designers additional flexibility when routing power and feedback cables in compact equipment.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B580J-SJ74AA
Product Type	Rotary AC Servo Motor
Motor Technology	Brushless Permanent-Magnet Servo Motor
Application	Industrial Motion Control
Voltage Class	460 V AC
Frame Size	165 mm / 6.50 in
Magnet Stack	203.2 mm / 8.0 in
Speed Rating	3750 RPM
Maximum Speed Class	Approximately 3800 RPM
Feedback	Single-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos class
Feedback Protocol	Hiperface
Shaft	Keyed shaft extension
Brake	24 V DC holding brake
Connector	SpeedTEC DIN connector
Connector Style	Right-angle
Connector Adjustment	180° rotatable
Mounting	IEC metric flange mounting
Mounting Holes	Free mounting holes, Type FF
Weight	Approximately 40.9 kg
Frame Dimension	165 mm
Magnet Stack Dimension	203.2 mm
Overall Dimensions	Refer to the applicable mechanical drawing

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3. Basic Technical Parameters

Parameter	MPL-B580J-SJ74AA
Motor Type	Low-Inertia Brushless AC Servo Motor
Rated Voltage	460 V AC class
Power System	Three-phase AC
Speed Rating	3750 RPM
Maximum Speed Class	3800 RPM
Continuous Torque	Approximately 34 N·m class
Peak Torque	High dynamic peak-torque capability; application dependent
Frame Size	165 mm
Magnet Stack Length	203.2 mm
Feedback Type	Single-turn high-resolution absolute encoder
Feedback Technology	1024 Sin/Cos Hiperface
Shaft Type	Keyed shaft extension
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Orientation	Right angle
Connector Rotation	180° rotatable
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Protection Class	IP50 class; enhanced sealing configurations may be available depending on installation arrangement
Weight	Approx. 40.9 kg
Frame Dimension	165 mm
Stack Dimension	203.2 mm
Overall Motor Envelope	Configuration/mechanical-drawing dependent

The 165 mm frame and 203.2 mm magnet stack place this motor in a relatively large industrial servo-motor class.

The 3750 RPM speed rating gives the motor considerably more speed capability than many general-purpose 3000 RPM servo motors.

This makes the B580J family especially useful where the machine requires both substantial torque and relatively high rotational speed.

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4. Mechanical Specifications

Mechanical Parameter	Specification
Frame Size	165 mm
Frame Size	6.50 in class
Magnet Stack	203.2 mm
Magnet Stack	8.0 in class
Shaft	Keyed shaft extension
Shaft Seal	Configuration dependent; standard configuration may not include shaft sealing
Brake	24 V DC holding brake
Mounting	IEC metric flange mounting
Mounting Holes	Free mounting holes, Type FF
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180° rotatable
Motor Construction	Low-inertia rotor
Weight	Approx. 40.9 kg
Frame Dimension	165 mm
Stack Dimension	203.2 mm
Overall Length	Refer to mechanical drawing
Overall Width	Refer to mechanical drawing
Overall Height	Refer to mechanical drawing

The physical size of the motor should be considered during machine design.

The 165 mm frame establishes the mounting class, while the 203.2 mm magnet stack indicates the active motor length category.

The total installed envelope is larger than the magnet stack alone because it also includes the flange, shaft extension, rear housing, and connector assembly.

For that reason, the frame and stack measurements are useful for preliminary equipment design, while the final mounting arrangement should be based on the detailed mechanical drawing.

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5. Electrical Characteristics

The MPL-B580J-SJ74AA is a three-phase brushless permanent-magnet servo motor.

It is designed to work with a compatible servo drive that controls the motor’s phase current and interprets the encoder feedback.

The 460 V AC class makes it suitable for higher-voltage industrial motion systems.

The motor’s speed rating of 3750 RPM, together with a maximum speed class around 3800 RPM, gives it a useful combination of high rotational speed and substantial torque capability.

The electrical characteristics should always be evaluated together with the drive, motor cable, feedback cable, braking circuit, and actual machine duty cycle.

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6. Feedback System

The MPL-B580J-SJ74AA uses a single-turn high-resolution absolute encoder.

The encoder provides detailed rotor-position information to the servo drive.

The commonly specified feedback arrangement is a 1024 Sin/Cos Hiperface encoder.

The single-turn design means that the encoder provides precise position information within one mechanical revolution.

This is highly useful for applications where the servo drive needs accurate position information during normal machine operation.

Typical applications include:

• Rotary indexing
• Positioning axes
• Packaging machinery
• Material handling
• Machine tools
• Printing equipment
• Assembly equipment
• Automated production machinery

The encoder feedback is one of the most important components of the servo-control system because it allows the drive to compare commanded motion with actual motor motion.

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7. 24 V DC Holding Brake

A major feature of the MPL-B580J-SJ74AA is the integrated 24 V DC holding brake.

The brake is intended to mechanically hold the motor shaft when required.

This can be especially useful for:

• Vertical axes
• Lift mechanisms
• Position-holding applications
• Machines where the load must remain stationary when servo power is removed
• Equipment where uncontrolled shaft movement could create a mechanical problem

The brake should not automatically be treated as the primary stopping device for every application.

Its correct use depends on the machine design, safety requirements, load characteristics, and braking strategy.

The servo drive and machine controller should also be configured correctly so that the brake engages and releases at the appropriate time.

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8. Product Introduction

The MPL-B580J-SJ74AA is designed for industrial motion systems where standard induction motors are not sufficient.

A conventional motor may be suitable for continuous rotation, but many automated machines need something different.

They may require a motor to:

• Accelerate quickly
• Stop accurately
• Reverse direction
• Hold a precise position
• Follow a programmed speed profile
• Coordinate with other machine axes
• Repeat the same motion thousands of times

This is where a servo motor becomes valuable.

The MPL-B580J-SJ74AA combines a low-inertia rotor, high-resolution feedback, high-speed operation, and substantial torque capability in one motor package.

The result is a motor well suited to demanding automated equipment.

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9. Low-Inertia Design

The low-inertia design is one of the defining characteristics of the MPL series.

Rotor inertia determines how much effort is required to change the speed of the rotating assembly.

A lower-inertia rotor can accelerate and decelerate more quickly.

This becomes particularly important in machines that repeatedly perform short motion cycles.

For example, an indexing machine may accelerate from zero speed, reach operating speed, stop, reverse, and repeat the process many times per minute.

The low-inertia motor design helps the servo system respond quickly to these commands.

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10. High-Speed Capability

The B580J configuration is designed for relatively high-speed operation.

The model has a 3750 RPM rated speed, with a maximum speed class around 3800 RPM.

This makes it suitable for applications where a 3000 RPM servo motor may not provide enough speed margin.

High-speed operation can improve machine throughput when the mechanical system is designed to take advantage of it.

Examples include:

• High-speed indexing
• Fast feeding
• Roller applications
• Printing
• Converting
• Packaging
• High-speed material handling

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11. Torque Capability

The B580J-SJ74AA belongs to a high-output servo-motor class.

Its continuous torque capability is approximately 34 N·m class, while the servo system can provide substantially higher short-duration torque when operating within the appropriate peak limits.

The actual usable torque depends on:

• Speed
• Ambient temperature
• Duty cycle
• Acceleration
• Mechanical load
• Drive configuration
• Cooling conditions
• Servo tuning

For this reason, the motor should be sized using the complete machine motion profile rather than selecting it only from a single torque number.

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12. Main Product Advantages

12.1 High Dynamic Response

The low-inertia rotor allows rapid changes in speed.

This can shorten machine cycles and improve positioning performance.

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12.2 High-Speed Operation

The 3750 RPM speed rating provides a useful advantage for high-speed motion applications.

Machines that require fast rollers, rapid indexing, or short cycle times can benefit from this characteristic.

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12.3 High-Resolution Feedback

The single-turn high-resolution encoder provides detailed position feedback.

This helps the servo system maintain accurate positioning and speed control.

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12.4 Integrated Holding Brake

The 24 V DC brake makes the motor suitable for applications where the shaft must be mechanically held.

This is particularly useful for vertical or gravity-loaded mechanisms.

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12.5 Keyed Shaft

The keyed shaft provides a conventional mechanical interface.

It can be used with a wide range of compatible industrial transmission components.

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12.6 Flexible Connector Arrangement

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

This is helpful when the motor is installed in a compact machine where cable routing space is limited.

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12.7 High Torque Density

The motor provides substantial torque within a 165 mm frame.

This helps machine designers achieve high mechanical output without necessarily moving to an even larger frame size.

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13. Typical Applications

13.1 Packaging Machinery

Packaging machines often require rapid and repeatable movements.

The MPL-B580J-SJ74AA can be considered for:

• Product indexing
• Film feeding
• Cutting
• Sealing
• Labeling
• Carton positioning
• Conveyor synchronization
• Product transfer

The high-speed capability and brake option make it useful for a wide range of packaging-axis applications.

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14. Material Handling

Material-handling systems require accurate movement and synchronization.

Possible applications include:

• Conveyor positioning
• Transfer mechanisms
• Sorting systems
• Roller drives
• Feed mechanisms
• Automated positioning
• Lift systems

The integrated brake is particularly relevant when a load needs to remain stationary after motion stops.

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15. Printing Machinery

Printing machinery often requires coordinated motion between rollers and feed mechanisms.

The motor can be used for:

• Feed rollers
• Registration systems
• Web handling
• Cutting mechanisms
• Roller positioning
• Auxiliary motion axes

High-resolution feedback is particularly important when several axes must remain synchronized.

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16. Converting Equipment

Converting equipment handles continuous materials such as paper, film, foil, and other web products.

Servo motors are commonly used for:

• Feeding
• Slitting
• Cutting
• Web positioning
• Roller synchronization
• Registration
• Indexing

The B580J’s relatively high speed is useful for machines that need rapid material movement.

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17. Assembly Automation

Automated assembly systems require repeatable positioning and controlled movement.

Typical uses include:

• Rotary indexing
• Component positioning
• Fixture movement
• Transfer mechanisms
• Pick-and-place systems
• Automated stations
• Precision feed mechanisms

The encoder provides feedback for closed-loop motion control.

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18. Machine Tools

The MPL-B580J-SJ74AA can also be considered for appropriate machine-tool axes.

Potential applications include:

• Feed axes
• Rotary positioning
• Auxiliary axes
• Indexing tables
• Tool positioning
• Automated adjustment

The actual selection should take into account cutting forces, reflected inertia, required acceleration, speed, and continuous duty.

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19. Typical Servo System

The motor is normally installed as part of a complete motion-control system.

System Component	Main Function
Motion Controller	Generates motion commands
Servo Drive	Controls motor current, speed, and torque
Servo Motor	Produces controlled mechanical motion
Encoder	Provides position feedback
Brake	Holds the shaft when required
Power Cable	Supplies controlled motor power
Feedback Cable	Carries encoder information
Coupling	Connects motor to machine load
Gearbox	Adjusts speed and torque when required
Mechanical Load	Performs the actual machine operation

Correct integration of all these components is essential.

A high-performance motor cannot achieve its intended performance if the drive is undersized, the load inertia is excessive, the coupling is poorly aligned, or the motion profile is unsuitable.

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20. Mechanical Installation

The motor should be installed on a rigid mounting surface.

The flange should be properly aligned with the driven mechanism.

The shaft should remain correctly aligned with the coupling or transmission.

Poor alignment can result in:

• Increased bearing loading
• Excessive vibration
• Mechanical noise
• Coupling wear
• Reduced positioning accuracy
• Premature mechanical failure

The motor should also have adequate clearance around the housing and connector.

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21. Brake Installation Considerations

The 24 V DC holding brake requires proper electrical control.

The brake should not be repeatedly engaged and released in a way that exceeds its intended operating characteristics.

For vertical applications, the machine designer should consider what happens during:

• Power failure
• Servo fault
• Emergency stop
• Controller shutdown
• Drive fault
• Maintenance

The brake should be integrated into the machine’s overall safety and stopping strategy.

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22. Cable and Connector Considerations

The SpeedTEC DIN connector is designed for industrial servo installation.

The right-angle configuration reduces the required space behind the motor.

Because the connector can rotate 180 degrees, the cable exit can be positioned to better suit the machine structure.

Cable routing should avoid:

• Sharp bends
• Excessive pulling
• Crushing
• Abrasion
• Excessive heat
• Unsupported cable weight

The feedback cable is particularly important because signal quality directly affects servo feedback performance.

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23. Environmental Characteristics

Environmental Parameter	Specification / Consideration
Protection Class	IP50 class for standard configuration
Enhanced Environmental Protection	Possible with suitable sealing/configuration
Motor Type	Industrial brushless servo motor
Mounting	IEC metric flange
Operating Environment	Industrial machinery environment
Moisture Exposure	Requires appropriate protection
Dust Exposure	Requires suitable enclosure/protection
Vibration	Should remain within applicable motor limits
Weight	Approx. 40.9 kg
Frame Dimension	165 mm
Magnet Stack	203.2 mm

The environmental rating should always be considered together with the shaft seal, connector arrangement, cables, and actual machine enclosure.

The motor should not automatically be assumed to be suitable for heavy washdown or severe contamination without the appropriate configuration.

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24. Dimensions and Weight

Physical Parameter	Value
Frame Size	165 mm
Frame Size	6.50 in class
Magnet Stack	203.2 mm
Magnet Stack	8.0 in class
Weight	Approx. 40.9 kg
Shaft	Keyed
Brake	24 V DC
Mounting	IEC metric flange
Connector	Right-angle SpeedTEC DIN
Connector Rotation	180°
Overall Motor Length	Mechanical drawing required for exact value
Overall Width	Mechanical drawing required for exact value
Overall Height	Mechanical drawing required for exact value

The 40.9 kg weight should be considered when designing the motor mounting structure.

For moving machine axes, motor mass can also contribute to the total moving inertia of the machine.

The 165 mm frame and 203.2 mm stack provide a useful dimensional reference for preliminary layout, but the complete motor envelope should be taken from the applicable mechanical drawing before fabrication.

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25. Maintenance Considerations

Regular maintenance should focus on the complete motion system rather than the motor alone.

Recommended inspection points include:

• Mounting bolts
• Motor flange
• Shaft coupling
• Encoder cable
• Power cable
• Connector
• Brake wiring
• Abnormal vibration
• Abnormal noise
• Excessive temperature
• Mechanical backlash
• Servo following errors
• Repeated overload conditions

The brake should also be monitored if the application uses frequent brake operation.

Unusual brake noise, delayed engagement, or unexpected shaft movement should be investigated.

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26. Five Recommended Same-Series or Closely Related Models

The following models are useful comparisons within the MPL family and the B580J platform.

Model	Speed	Feedback	Shaft	Brake	Frame / Stack	Weight / Dimension Reference
MPL-B580J-SJ74AA	3750 RPM	Single-turn high-resolution absolute	Keyed	24 V DC	165 mm / 203.2 mm	Approx. 40.9 kg; 165 mm × 203.2 mm stack
MPL-B580J-SJ72AA	3750 RPM class	Single-turn high-resolution absolute	Keyed	No brake	165 mm / 203.2 mm	Configuration-dependent; 165 mm × 203.2 mm stack
MPL-B580J-SK74AA	3750 RPM class	Single-turn high-resolution absolute	Keyless	24 V DC	165 mm / 203.2 mm	Configuration-dependent; 165 mm × 203.2 mm stack
MPL-B580J-SK72AA	3750 RPM class	Single-turn high-resolution absolute	Keyless	No brake	165 mm / 203.2 mm	Configuration-dependent; 165 mm × 203.2 mm stack
MPL-B580F-SJ74AA	3000 RPM class	Single-turn high-resolution absolute	Keyed	24 V DC	165 mm / 203.2 mm	Configuration-dependent; 165 mm × 203.2 mm stack

These models provide a practical selection range.

The MPL-B580J-SJ72AA is the most direct comparison when the brake is not required.

The MPL-B580J-SK74AA is appropriate when a keyless shaft is preferred while retaining the brake.

The MPL-B580J-SK72AA combines a keyless shaft with a no-brake configuration.

The MPL-B580F-SJ74AA is useful when the machine does not need the higher B580J speed class and a 3000 RPM-class motor is sufficient.

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27. Comparison of the Related Models

Feature	MPL-B580J-SJ74AA	MPL-B580J-SJ72AA	MPL-B580J-SK74AA	MPL-B580J-SK72AA	MPL-B580F-SJ74AA
Speed Class	3750 RPM	3750 RPM	3750 RPM	3750 RPM	3000 RPM
Feedback	Single-turn absolute	Single-turn absolute	Single-turn absolute	Single-turn absolute	Single-turn absolute
Shaft	Keyed	Keyed	Keyless	Keyless	Keyed
Brake	24 V DC	No	24 V DC	No	24 V DC
Frame	165 mm	165 mm	165 mm	165 mm	165 mm
Stack	203.2 mm	203.2 mm	203.2 mm	203.2 mm	203.2 mm
Weight	Approx. 40.9 kg	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent
Main Advantage	Brake + keyed shaft + high speed	Simpler no-brake version	Brake + keyless shaft	Keyless + no brake	Lower speed class

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28. Five Popular Models from the Same Brand

For a broader product comparison, the following models are useful related selections from the same brand.

Model	Product Category	Main Specification	Feedback	Shaft / Brake	Dimension Reference	Weight
MPL-B580J-SJ74AA	MPL Servo Motor	460 V AC, 3750 RPM, high-torque class	Single-turn absolute	Keyed / 24 V DC brake	165 mm / 203.2 mm	Approx. 40.9 kg
MPL-B580J-SJ72AA	MPL Servo Motor	460 V AC, 3750 RPM class	Single-turn absolute	Keyed / No brake	165 mm / 203.2 mm	Configuration-dependent
MPL-B580J-SK74AA	MPL Servo Motor	460 V AC, 3750 RPM class	Single-turn absolute	Keyless / 24 V DC brake	165 mm / 203.2 mm	Configuration-dependent
MPL-B560F-SJ74AA	MPL Servo Motor	460 V AC, 3000 RPM class	Single-turn absolute	Keyed / 24 V DC brake	165 mm / 152.4 mm	Configuration-dependent
MPL-B560F-SK74AA	MPL Servo Motor	460 V AC, 3000 RPM class	Single-turn absolute	Keyless / 24 V DC brake	165 mm / 152.4 mm	Configuration-dependent

These models cover several of the most useful combinations of speed, motor length, shaft arrangement, feedback type, and brake configuration.

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29. B580J Versus B560F

The B580J and B560F families use the same general 165 mm frame class but have different magnet-stack lengths.

Feature	B560F	B580J
Frame	165 mm	165 mm
Magnet Stack	152.4 mm	203.2 mm
Typical Speed	3000 RPM	3750 RPM
Maximum Speed Class	Lower	Approximately 3800 RPM
Motor Length	Shorter	Longer
Torque Capability	Lower class	Higher class
Space Requirement	Lower	Higher
Typical Application	Compact high-performance axes	Higher-speed, higher-output axes

The B560F family can be a better choice where machine space is limited.

The B580J family is more attractive when the application requires greater torque and higher speed.

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30. Keyed Shaft Advantages

The keyed shaft extension provides a positive mechanical torque-transfer method.

It is suitable for conventional industrial mechanical systems.

Typical compatible components include:

• Flexible couplings
• Rigid couplings
• Timing pulleys
• Gearboxes
• Rollers
• Gears
• Lead-screw drives
• Belt-driven systems

When installing a coupling, shaft alignment should be checked carefully.

A poorly aligned coupling can create unnecessary radial and axial forces.

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31. Brake Advantages

The 24 V DC brake makes this model particularly attractive for load-holding applications.

For example, consider a vertical axis carrying a mechanical load.

When servo power is removed, the load may attempt to move under gravity.

A holding brake can help prevent unwanted movement when properly integrated into the control and mechanical system.

This makes the SJ74AA configuration more versatile than a comparable no-brake model for certain machine designs.

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32. Where the SJ72AA May Be Better

The no-brake MPL-B580J-SJ72AA can be preferable when a holding brake is not required.

Removing the brake can simplify the motor configuration and may reduce unnecessary complexity in applications where the load is already mechanically secure.

Typical examples include:

• Horizontal conveyors
• Rotary mechanisms
• Certain roller applications
• Horizontal indexing axes
• Machine-tool axes with independent mechanical holding

The correct choice depends on the actual machine.

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33. Where the SK74AA May Be Better

The MPL-B580J-SK74AA provides a different mechanical shaft arrangement.

It combines:

• B580J high-speed performance
• Single-turn high-resolution feedback
• Keyless shaft configuration
• 24 V DC holding brake

This can be useful when the machine’s coupling or transmission system is designed specifically for a keyless shaft connection.

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34. Servo Tuning

Because the motor is designed for dynamic motion, servo tuning is important.

The following factors should be considered:

• Motor inertia
• Load inertia
• Gear ratio
• Coupling stiffness
• Mechanical resonance
• Acceleration
• Deceleration
• Position-loop gain
• Speed-loop gain
• Motion profile

Poor tuning can produce:

• Vibration
• Overshoot
• Audible noise
• Excessive following error
• Increased motor temperature
• Reduced positioning accuracy

The motor’s low-inertia characteristics can provide excellent dynamic response when the complete system is tuned correctly.

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35. Thermal Considerations

A servo motor’s temperature depends on the actual motion profile rather than speed alone.

A motor repeatedly producing high torque during acceleration may generate considerably more heat than one operating at moderate torque.

Important thermal factors include:

• Continuous torque
• Peak torque
• Average torque
• Speed
• Acceleration
• Cycle time
• Ambient temperature
• Machine enclosure
• Motor mounting
• Cooling conditions

The motor should therefore be selected based on the complete RMS torque and duty-cycle requirements.

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36. Product Advantages Summary

Advantage	Description
High-Speed Capability	3750 RPM rated-speed class
High Maximum Speed	Approximately 3800 RPM class
High Torque Output	Approximately 34 N·m continuous class
Low-Inertia Design	Fast acceleration and deceleration
Absolute Feedback	High-resolution single-turn feedback
Hiperface Feedback	Sin/Cos encoder technology
Holding Brake	24 V DC brake
Keyed Shaft	Conventional mechanical transmission
Flexible Connector	180° rotatable right-angle DIN
Large Industrial Frame	165 mm
Long Magnet Stack	203.2 mm
Industrial Servo Construction	Designed for demanding motion applications

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37. Practical Selection Guide

Application Requirement	Recommended Model Direction
Need 3750 RPM class	MPL-B580J family
Need 3000 RPM class	MPL-B580F family
Need single-turn absolute feedback	SJ models
Need multi-turn absolute feedback	MJ models
Need keyed shaft	J shaft configuration
Need keyless shaft	K shaft configuration
Need 24 V DC brake	74 configuration
No brake required	72 configuration
Need high-speed + keyed + brake	MPL-B580J-SJ74AA
Need high-speed + keyed + no brake	MPL-B580J-SJ72AA
Need high-speed + keyless + brake	MPL-B580J-SK74AA

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38. Quick Technical Reference

Parameter	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B580J-SJ74AA
Motor Type	Rotary Brushless AC Servo Motor
Voltage	460 V AC class
Phase	Three-phase
Speed Rating	3750 RPM
Maximum Speed Class	Approximately 3800 RPM
Continuous Torque	Approx. 34 N·m class
Frame Size	165 mm
Magnet Stack	203.2 mm
Feedback	Single-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos class
Feedback Protocol	Hiperface
Shaft	Keyed shaft extension
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	180°
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Protection	IP50 class
Weight	Approx. 40.9 kg
Frame Dimension	165 mm
Stack Dimension	203.2 mm
Overall Dimensions	Refer to mechanical drawing
Typical Applications	Packaging, material handling, printing, converting, assembly, machine tools, indexing

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39. Final Product Evaluation

The Allen-Bradley MPL-B580J-SJ74AA is a powerful industrial servo motor designed for applications where high-speed operation, accurate feedback, dynamic response, and mechanical load holding are important.

Its combination of a 165 mm frame, 203.2 mm magnet stack, 3750 RPM rated speed, approximately 34 N·m continuous torque class, single-turn high-resolution absolute feedback, keyed shaft, and 24 V DC holding brake makes it a versatile choice for demanding motion-control systems.

The low-inertia construction gives the motor strong dynamic characteristics.

The high-speed B580J platform allows the motor to operate at speeds beyond the common 3000 RPM servo class.

The single-turn absolute encoder provides accurate rotor-position feedback, while the integrated 24 V DC brake adds an important mechanical holding function.

The keyed shaft makes the motor easy to integrate with conventional industrial mechanical transmission systems.

The right-angle, rotatable DIN connector is another practical advantage, particularly in machines where cable routing space is limited.

The motor’s relatively substantial 40.9 kg weight should be taken into account during machine-frame design and when the motor is installed on a moving axis.

The B580J-SJ74AA is especially attractive for applications that need a combination of high speed, high torque, precise position feedback, and brake holding capability.

For a similar motor without a brake, the SJ72AA configuration is a logical comparison.

For a keyless shaft arrangement, the SK74AA is a useful alternative.

For applications where 3000 RPM is sufficient and a somewhat different motor configuration is preferred, the B580F family provides another selection path.

Overall, the MPL-B580J-SJ74AA can be regarded as a large-frame, high-speed, low-inertia industrial servo motor with high-resolution single-turn feedback and an integrated 24 V DC holding brake, making it well suited to demanding automated machinery and closed-loop motion-control applications.