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Allen-Bradley MPL-B4530F-RJ72AA Servo Motor
Detailed Technical Specifications, Product Introduction, Applications, Advantages, Series Information and Related Models
1. Product Overview
The Allen-Bradley MPL-B4530F-RJ72AA is a low-inertia brushless AC servo motor designed for industrial motion-control systems that require controlled speed, accurate positioning, repeatable movement, and reliable dynamic performance.
This motor belongs to the MP-Series MPL Low-Inertia Brushless Servo Motor family and is part of the 460 V AC-class motor range.
The MPL-B4530F-RJ72AA uses a 130 mm frame size, a 76.2 mm magnet stack, and a 3000 rpm speed class.
One of the defining features of this particular configuration is its resolver feedback system. Unlike the high-resolution absolute encoder configurations within the same MPL family, this model uses a resolver as its feedback device.
The motor also uses a keyed shaft extension, providing a conventional mechanical connection for compatible couplings, pulleys, gears, and other machine transmission components.
Another important feature is the absence of an integral brake. This makes the motor suitable for applications where a holding brake is not required or where braking and mechanical holding are handled separately by the machine design.
The motor uses a right-angle SpeedTEC DIN connector with approximately 180° rotational adjustment, providing flexibility when routing motor cables in compact machine installations.
The overall design is intended for high-cycle industrial automation, precision positioning, indexing, material handling, packaging, assembly, and other servo-controlled machine applications.
2. Brand and Product Series
| Item | Description |
|---|---|
| Brand | Allen-Bradley |
| Product Family | MP-Series |
| Motor Series | MPL Low-Inertia Brushless Servo Motors |
| Product Type | Rotary AC servo motor |
| Motor Technology | Permanent-magnet brushless AC servo |
| Voltage Class | 400 V AC class |
| Armature Voltage | 460 V AC |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. class |
| Magnet Stack | 30 / 76.2 mm / 3.0 in. |
| Rated Speed | 3000 rpm |
| Feedback Type | Resolver |
| Shaft Configuration | Keyed shaft extension |
| Brake | No integral brake |
| Connector | SpeedTEC DIN |
| Connector Style | Right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange |
| Mounting Hole Type | Free mounting holes / FF |
| Motor Design | Low-inertia brushless servo |
The MPL series is designed for machine axes where the motor must respond quickly to commands from a servo drive.
Rather than operating as a simple constant-speed motor, the MPL-B4530F-RJ72AA is intended to work in a closed-loop servo system.
The controller and servo drive use feedback from the motor to regulate speed, position, acceleration, deceleration, and torque.
3. Main Technical Parameters
| Parameter | MPL-B4530F-RJ72AA |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Brand | Allen-Bradley |
| Series | MP-Series MPL |
| Motor Type | Low-inertia brushless AC servo motor |
| Voltage Class | 400 V AC class |
| Armature Voltage | 460 V AC |
| Rated Speed | 3000 rpm |
| Maximum Speed | 3000 rpm class |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Rated Continuous Power | Approximately 2.1 kW |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. class |
| Magnet Stack Length | 76.2 mm / 3.0 in. |
| Feedback Type | Resolver |
| Feedback Technology | Resolver-based position feedback |
| Shaft Type | Keyed |
| Shaft Key | Yes |
| Shaft Seal | No |
| Brake | No integral brake |
| Connector | SpeedTEC DIN |
| Connector Configuration | Right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange |
| Mounting Hole Style | Free mounting holes / FF |
| Rotor Construction | Low inertia |
| Rotor Inertia | Approximately 0.00040 kg·m² |
| Approximate Motor Weight | 9.5 kg |
| Typical Application | Industrial servo motion control |
The motor provides approximately 8.25 N·m of continuous stall torque and approximately 20.3 N·m of peak stall torque.
This combination provides a useful balance between continuous load capability and short-duration acceleration performance.
The 3000 rpm speed class is well suited to general industrial servo applications where torque and dynamic response are more important than extremely high rotational speed.
4. Dimensions and Weight
The MPL-B4530F-RJ72AA uses a 130 mm frame class and a 76.2 mm magnet stack.
The 130 mm frame provides a relatively compact mechanical package for the available torque level.
| Mechanical Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. class |
| Magnet Stack Length | 76.2 mm / 3.0 in. |
| Mounting Standard | IEC Metric |
| Mounting Type | Flange mount |
| Mounting Hole Style | Free mounting holes / FF |
| Shaft Type | Keyed |
| Shaft Key | Yes |
| Shaft Seal | None |
| Brake | No integral brake |
| Connector | Right-angle SpeedTEC DIN |
| Connector Rotation | 180° |
| Approximate Weight | 9.5 kg |
The approximately 9.5 kg motor weight should be taken into account when designing the machine mounting structure.
The mounting plate or machine frame should be rigid enough to support both the motor itself and the mechanical forces produced during acceleration, deceleration, reversing, and load movement.
5. Electrical and Performance Characteristics
The MPL-B4530F-RJ72AA is designed for a 460 V AC armature voltage class and a 3000 rpm rated-speed configuration.
Its continuous stall torque is approximately 8.25 N·m, with approximately 20.3 N·m peak stall torque.
| Performance Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Armature Voltage | 460 V AC |
| Voltage Class | 400 V AC class |
| Rated Speed | 3000 rpm |
| Maximum Speed | 3000 rpm |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Rated Continuous Power | Approx. 2.1 kW |
| Rotor Inertia | Approx. 0.00040 kg·m² |
| Frame Size | 130 mm |
| Magnet Stack | 76.2 mm |
| Weight | Approx. 9.5 kg |
The relatively low rotor inertia is an important advantage for dynamic motion.
When a servo axis repeatedly accelerates and decelerates, the motor must continuously change its rotational speed.
A lower rotor inertia helps the servo system change motor speed more efficiently, which can contribute to faster machine response and shorter positioning cycles.
6. Resolver Feedback System
The MPL-B4530F-RJ72AA is equipped with a resolver feedback system.
This is one of the main characteristics separating this model from the MPL configurations that use multi-turn absolute or single-turn high-resolution encoders.
A resolver is a robust rotary position feedback device designed to provide the servo drive with information about rotor position.
| Feedback Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Feedback Type | Resolver |
| Feedback Technology | Rotary resolver |
| Primary Function | Motor position feedback |
| Control Type | Closed-loop servo control |
| Position Feedback | Rotor angular position |
| Typical Benefit | Robust position feedback |
| Typical Application | Industrial servo motion systems |
Resolver-based feedback can be attractive in industrial environments where robustness and straightforward feedback architecture are important.
The resolver does not provide the same type of digital absolute multi-turn information associated with the MPL-MJ configurations.
Instead, the resolver provides the servo system with rotary position information that can be used for closed-loop speed and position control.
7. Resolver Versus High-Resolution Encoder
The difference between resolver and encoder feedback is important when selecting a replacement motor.
| Feature | MPL-B4530F-RJ72AA | MPL Encoder Configuration |
|---|---|---|
| Feedback | Resolver | High-resolution encoder |
| Absolute Multi-turn Information | No | Available on selected configurations |
| Feedback Principle | Electromagnetic resolver | Optical/electronic encoder |
| Typical Strength | Robust feedback | Higher-resolution position information |
| Configuration | RJ | MJ/MK/SJ/SK families |
| Typical Application | General industrial servo | Precision/high-resolution motion |
| Replacement Compatibility | Requires resolver-compatible system | Requires encoder-compatible system |
A resolver-based motor should not be treated as a direct electrical replacement for an encoder-based motor simply because the frame size and torque ratings are similar.
The servo drive must support the corresponding feedback technology.
8. Keyed Shaft Configuration
The MPL-B4530F-RJ72AA uses a keyed shaft extension.
This is a conventional and widely used industrial motor shaft arrangement.
| Shaft Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Shaft Type | Keyed |
| Shaft Key | Yes |
| Shaft Seal | None |
| Mechanical Connection | Keyed coupling or compatible transmission |
| Typical Components | Couplings, pulleys, gears, mechanical drives |
| Main Advantage | Conventional mechanical connection |
| Typical Application | Industrial servo transmission |
The keyed shaft can be useful when the machine already uses keyed couplings or other mechanical components designed around a shaft key.
The coupling should be properly selected according to motor torque, peak torque, speed, radial loading, axial loading, and acceleration requirements.
9. No Integral Brake
The MPL-B4530F-RJ72AA is supplied without an integral holding brake.
This is an important distinction when comparing it with brake-equipped configurations.
| Brake Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Integral Brake | No |
| Holding Brake | Not included |
| Brake Voltage | Not applicable |
| Typical Machine Requirement | External holding method if required |
| Suitable Applications | Horizontal axes and non-gravity-loaded axes |
| Main Advantage | Simpler motor configuration |
The absence of an integral brake can be advantageous when the machine does not require motor-mounted holding.
It can also reduce unnecessary motor complexity in horizontal applications where the load naturally remains in position or where a separate mechanical braking system is already installed.
For vertical axes, however, the machine designer should carefully evaluate whether an external holding brake or another load-retention method is required.
10. Connector Configuration
The motor uses a SpeedTEC DIN right-angle connector.
The connector can be rotated through approximately 180°, providing flexibility during installation.
| Connector Parameter | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Connector Type | SpeedTEC DIN |
| Connector Style | Right-angle |
| Connector Rotation | 180° |
| Connection Style | Quick-connect |
| Main Advantage | Flexible cable routing |
| Installation Benefit | Reduced cable-routing restrictions |
The right-angle configuration can be particularly useful in compact machine assemblies.
When several servo motors are mounted close together, connector orientation can have a significant effect on available cable space.
The ability to rotate the connector allows the installer to choose a more practical cable direction.
11. Product Introduction
The MPL-B4530F-RJ72AA is a general-purpose industrial servo motor within the MPL low-inertia family.
Its design focuses on dynamic response, closed-loop control, and repeatable motion.
The motor’s 3000 rpm operating class makes it suitable for a wide range of automated machine axes.
Its 8.25 N·m continuous stall torque provides substantial continuous torque for its frame class, while the approximately 20.3 N·m peak torque capability provides additional short-term torque during acceleration and other demanding motion events.
The resolver feedback system provides the motor with a robust position-feedback method.
The keyed shaft provides a conventional mechanical interface.
The lack of an integral brake keeps the motor configuration focused on the motor’s primary servo function rather than adding a holding mechanism that may not be required by every machine.
12. Low-Inertia Motor Design
The low-inertia design is one of the defining features of the MPL family.
In a servo system, the motor may repeatedly perform rapid changes in speed.
For example, a packaging machine may accelerate an axis, move it to a specific location, decelerate, stop, reverse, and then repeat the entire cycle.
The rotor inertia affects how quickly these changes can occur.
The approximately 0.00040 kg·m² rotor inertia of the MPL-B4530F-RJ72AA is well suited to dynamic motion applications.
Potential benefits include:
- Faster acceleration
- Faster deceleration
- Improved reversing response
- Shorter settling time
- Better indexing performance
- Reduced unnecessary rotational energy
- Improved cycle-time potential
- Better response to changing motion commands
13. Main Product Advantages
13.1 Low-Inertia Construction
The low-inertia rotor allows the motor to respond quickly to speed and position commands.
This is especially useful in machines that perform repetitive movement.
13.2 3000 rpm Speed Rating
The 3000 rpm rating provides a useful balance between motor speed and available torque.
It is suitable for many general-purpose industrial servo axes.
13.3 8.25 N·m Continuous Torque
The approximately 8.25 N·m continuous stall torque provides useful continuous load-handling capability.
This makes the motor suitable for medium-duty servo applications where continuous torque is an important consideration.
13.4 20.3 N·m Peak Torque
The peak torque capability provides additional torque during acceleration and other short-duration load changes.
This is important for machines with demanding motion profiles.
13.5 Resolver Feedback
The resolver provides a robust position-feedback solution for servo control.
This can be attractive in industrial applications where feedback reliability and straightforward operation are important.
13.6 Keyed Shaft
The keyed shaft provides a conventional mechanical connection.
It can simplify integration with existing machinery using standard keyed couplings and mechanical transmission components.
13.7 No Integral Brake
For horizontal axes and applications that do not require shaft holding, the no-brake configuration can be advantageous.
There is no need to allocate motor space or control resources to a brake that the machine does not need.
13.8 Flexible Connector Orientation
The 180° rotatable right-angle connector helps simplify installation and cable routing.
14. Typical Applications
14.1 Packaging Machinery
The MPL-B4530F-RJ72AA is suitable for packaging equipment that requires repeated and controlled motion.
Potential applications include:
- Filling machines
- Cartoning equipment
- Labeling systems
- Sealing machines
- Product positioning
- Packaging indexing
- Material feeding
- Film handling mechanisms
The low-inertia design is particularly useful when the machine performs frequent acceleration and deceleration.
15. Automated Assembly Equipment
Automated assembly machinery often requires precise and repeatable movement.
The MPL-B4530F-RJ72AA can be used for:
- Component positioning
- Transfer mechanisms
- Rotary indexing
- Automated insertion
- Automated fastening
- Assembly tooling
- Workpiece positioning
- Component handling
The resolver feedback allows the servo controller to monitor motor position as part of the closed-loop motion system.
16. Material Handling
The motor can also be used for controlled material movement.
Potential applications include:
- Conveyor positioning
- Transfer mechanisms
- Automated feeders
- Sorting mechanisms
- Product positioning
- Pick-and-place systems
- Material transfer systems
The motor’s torque capability can be useful when the machine must move a moderate load while maintaining controlled acceleration and deceleration.
17. Indexing Machines
Indexing is one of the natural application areas for a low-inertia servo motor.
A typical indexing cycle may involve:
- Rapid acceleration.
- Movement toward the target position.
- Deceleration.
- Position settling.
- Workpiece processing.
- Return or reverse movement.
- Repetition of the cycle.
The low-inertia rotor can help the motor respond quickly during these repeated motion changes.
Typical machines include:
- Rotary indexing tables
- Automated inspection stations
- Assembly cells
- Packaging stations
- Machining transfer systems
18. Machine Tools and Auxiliary Axes
The MPL-B4530F-RJ72AA can be considered for certain machine-tool auxiliary axes and automated mechanical positioning systems.
Possible applications include:
- Tool positioning
- Material positioning
- Auxiliary rotary axes
- Automated fixtures
- Workpiece positioning
- Automated tool mechanisms
The exact suitability depends on the required accuracy, feedback architecture, speed, torque, and drive compatibility.
19. General Industrial Automation
The motor can be used in many types of industrial automation equipment where a servo-controlled rotary axis is required.
Examples include:
- Production-line equipment
- Automated feeders
- Transfer systems
- Inspection equipment
- Packaging systems
- Assembly machinery
- Conveyor positioning systems
- Automated material handling
- Precision indexing systems
20. Application Advantages
| Application | Main Advantage |
|---|---|
| Packaging | Fast repetitive motion |
| Indexing | Rapid acceleration and deceleration |
| Assembly | Repeatable positioning |
| Material handling | Controlled movement |
| Conveyor positioning | Closed-loop speed control |
| Inspection equipment | Repeatable axis movement |
| Rotary mechanisms | Accurate servo positioning |
| Machine tools | Controlled auxiliary movement |
| Automated feeders | High-cycle operation |
| Production automation | Coordinated servo motion |
21. Resolver Feedback Applications
Resolver feedback can be particularly useful when the machine requires reliable closed-loop motor position information without requiring the absolute multi-turn functionality of a high-resolution encoder.
Typical applications include:
- General industrial servo axes
- Rotary positioning
- Conveyor systems
- Packaging machinery
- Assembly equipment
- Material handling
- Indexing systems
- Automated production equipment
The resolver configuration can be a practical choice where the servo system has been designed around resolver feedback from the beginning.
22. Advantages of the No-Brake Configuration
The absence of an integral brake can be useful in applications where the motor shaft does not need to be mechanically held when power is removed.
For example, a horizontal conveyor axis may not require a holding brake because the mechanical system itself prevents uncontrolled movement.
Similarly, some rotary positioning mechanisms may use a separate mechanical locking system.
In these cases, a no-brake motor can provide a simpler overall machine configuration.
However, if the axis is vertical or the load can move because of gravity, a dedicated holding solution should be considered.
23. Mechanical Installation Considerations
The motor should be mounted on a rigid machine structure.
The motor shaft and driven load should be correctly aligned.
Misalignment can cause additional bearing loads and mechanical vibration.
The keyed shaft should be connected using a properly selected coupling or mechanical transmission component.
The coupling should be suitable for:
- Continuous torque
- Peak torque
- Operating speed
- Acceleration
- Deceleration
- Reversing
- Radial loads
- Axial loads
- Duty cycle
The machine mounting flange should also provide adequate support for the approximately 9.5 kg motor mass.
24. Environmental Considerations
The motor is intended for industrial automation use, but actual environmental suitability depends on the machine installation.
Important environmental factors include:
- Ambient temperature
- Humidity
- Dust
- Oil
- Coolant
- Cutting fluid
- Vibration
- Mechanical shock
- Contamination
- Cable exposure
The standard configuration does not include a shaft seal.
Therefore, applications with direct exposure to coolant, washdown liquid, oil, or other contaminants around the shaft should be evaluated carefully.
25. Five Same-Series or Closely Related Models
The following models are useful alternatives within the same MPL family.
| Model | Feedback | Shaft | Brake | Speed | Continuous Torque | Peak Torque | Power | Size | Weight |
|---|---|---|---|---|---|---|---|---|---|
| MPL-B4530F-RJ72AA | Resolver | Keyed | No | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | 9.5 kg |
| MPL-B4530F-RJ74AA | Resolver | Keyed | Yes | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | Approx. 11 kg class |
| MPL-B4530F-RK72AA | Resolver | Keyless | No | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | Approx. 9.5 kg class |
| MPL-B4530F-RK74AA | Resolver | Keyless | Yes | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | Approx. 11 kg class |
| MPL-B4530F-SJ72AA | Single-turn high-resolution encoder | Keyed | No | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | Approx. 8.2 kg |
These models are particularly useful when comparing the same basic motor frame while changing feedback, shaft, or brake configuration.
The MPL-B4530F-RJ74AA is the closest brake-equipped alternative.
The MPL-B4530F-RK72AA keeps the resolver configuration but changes the shaft from keyed to keyless.
The MPL-B4530F-RK74AA combines resolver feedback, keyless shaft construction, and an integral brake.
The MPL-B4530F-SJ72AA changes the feedback technology from resolver to single-turn high-resolution encoder while retaining a keyed, no-brake configuration.
26. Five Same-Brand Popular Models
| Model | Series | Feedback / Configuration | Rated Speed | Continuous Torque | Peak Torque | Power | Size | Weight |
|---|---|---|---|---|---|---|---|---|
| MPL-B430P-MJ74AA | MPL Low-Inertia | Multi-turn absolute / keyed / brake | 5000 rpm | 6.55 N·m | 19.8 N·m | 2.2 kW | 115 mm class | Approx. 5.5 kg |
| MPL-B430P-MK74AA | MPL Low-Inertia | Multi-turn absolute / keyless / brake | 5000 rpm | 6.55 N·m | 19.8 N·m | 2.2 kW | 115 mm class | Approx. 5.5 kg |
| MPL-B4530F-MJ74AA | MPL Low-Inertia | Multi-turn absolute / keyed / brake | 3000 rpm | 8.25 N·m | 20.3 N·m | 2.1 kW | 130 mm / 76.2 mm stack | Approx. 6–7 kg class |
| MPL-B4540F-MJ74AA | MPL Low-Inertia | Multi-turn absolute / keyed / brake | 3000 rpm | 10.2 N·m | 27.1 N·m | 2.6 kW | 130 mm class / 101.6 mm stack | Approx. 8.6 kg |
| MPL-B4560F-MJ74AA | MPL Low-Inertia | Multi-turn absolute / keyed / brake | 3000 rpm | 14.1 N·m | 34.4 N·m | 3.2 kW | Larger / longer stack | Approx. 11.82 kg |
These models cover several different industrial servo requirements.
The MPL-B430P models are attractive when higher motor speed is important.
The MPL-B4530F models provide a balanced combination of speed, torque, and compactness.
The MPL-B4540F provides more torque and power for heavier machine axes.
The MPL-B4560F is intended for applications where substantially higher torque is required.
27. Comparison with MPL-B4530F-MJ72AA
The MPL-B4530F-RJ72AA and MPL-B4530F-MJ72AA have similar basic mechanical characteristics but use different feedback systems.
| Parameter | MPL-B4530F-RJ72AA | MPL-B4530F-MJ72AA |
|---|---|---|
| Series | MPL | MPL |
| Frame | 130 mm | 130 mm |
| Magnet Stack | 76.2 mm | 76.2 mm |
| Rated Speed | 3000 rpm | 3000 rpm |
| Continuous Torque | 8.25 N·m | 8.25 N·m |
| Peak Torque | 20.3 N·m | 20.3 N·m |
| Rated Power | Approx. 2.1 kW | Approx. 2.1 kW |
| Feedback | Resolver | Multi-turn high-resolution encoder |
| Shaft | Keyed | Keyed |
| Brake | No | No |
| Connector | SpeedTEC DIN | SpeedTEC DIN |
| Rotor Inertia | Approx. 0.00040 kg·m² | Approx. 0.00040 kg·m² |
| Weight | Approx. 9.5 kg | Approx. 7.3 kg family class |
| Main Difference | Resolver feedback | Absolute multi-turn encoder |
The most important selection issue between these two motors is feedback compatibility.
If the existing servo system is designed for resolver feedback, the RJ72AA configuration is the appropriate type to investigate.
If the system is designed around an absolute multi-turn encoder, the MJ72AA configuration is more appropriate.
The two should not be considered interchangeable merely because their frame, speed, torque, and power ratings are similar.
28. Comparison with MPL-B4530F-RK72AA
The RJ72AA and RK72AA configurations are closely related resolver-feedback motors.
| Parameter | MPL-B4530F-RJ72AA | MPL-B4530F-RK72AA |
|---|---|---|
| Feedback | Resolver | Resolver |
| Rated Speed | 3000 rpm | 3000 rpm |
| Continuous Torque | 8.25 N·m | 8.25 N·m |
| Peak Torque | 20.3 N·m | 20.3 N·m |
| Power | Approx. 2.1 kW | Approx. 2.1 kW |
| Shaft | Keyed | Keyless |
| Brake | No | No |
| Frame | 130 mm | 130 mm |
| Magnet Stack | 76.2 mm | 76.2 mm |
| Connector | Right-angle DIN | Right-angle DIN |
| Main Difference | Keyed shaft | Keyless shaft |
The choice between the two is primarily mechanical.
If the machine uses a traditional keyed coupling, the RJ72AA configuration is a natural match.
If the machine uses a clamping or keyless coupling, the RK72AA configuration may be more appropriate.
29. Comparison with MPL-B4540F
The MPL-B4540F is a useful higher-torque alternative.
| Parameter | MPL-B4530F-RJ72AA | MPL-B4540F-RJ72AA |
|---|---|---|
| Rated Speed | 3000 rpm | 3000 rpm |
| Continuous Torque | 8.25 N·m | 10.2 N·m |
| Peak Torque | 20.3 N·m | 27.1 N·m |
| Rated Power | Approx. 2.1 kW | 2.6 kW |
| Frame Class | 130 mm | 130 mm class |
| Magnet Stack | 76.2 mm | 101.6 mm |
| Feedback | Resolver | Resolver |
| Shaft | Keyed | Keyed |
| Brake | No | No |
| Approx. Weight | 9.5 kg | Approx. 8.6 kg class |
| Main Advantage | Compact torque package | Higher torque and power |
The MPL-B4540F is a logical choice when the application requires more continuous torque or higher peak torque.
The MPL-B4530F-RJ72AA remains attractive when the existing machine design is optimized around the 76.2 mm stack length.
30. Comparison with MPL-B430P
The MPL-B430P is more speed-oriented.
| Parameter | MPL-B4530F-RJ72AA | MPL-B430P-MJ74AA |
|---|---|---|
| Rated Speed | 3000 rpm | 5000 rpm |
| Continuous Torque | 8.25 N·m | 6.55 N·m |
| Peak Torque | 20.3 N·m | 19.8 N·m |
| Rated Power | 2.1 kW | 2.2 kW |
| Frame Class | 130 mm | 115 mm class |
| Feedback | Resolver | Multi-turn absolute |
| Shaft | Keyed | Keyed |
| Brake | No | Yes |
| Main Strength | Torque and resolver feedback | Higher speed and absolute feedback |
The MPL-B430P is more suitable when the machine requires high-speed servo operation.
The MPL-B4530F-RJ72AA is better suited to applications where 3000 rpm is sufficient and resolver feedback is required.
31. Why Choose the MPL-B4530F-RJ72AA?
The MPL-B4530F-RJ72AA is a strong choice when several requirements come together.
First, the machine requires a 3000 rpm servo motor.
Second, the application needs approximately 8.25 N·m continuous torque and up to approximately 20.3 N·m peak torque.
Third, the machine control system is designed around resolver feedback.
Fourth, the mechanical system requires a keyed shaft.
Finally, the application does not require an integral motor brake.
When these conditions match the machine architecture, the RJ72AA configuration can be a practical and straightforward choice.
32. Important Selection Considerations
Before selecting the MPL-B4530F-RJ72AA as a replacement motor, the following points should be verified.
| Selection Item | Recommended Check |
|---|---|
| Motor Model | Confirm exact catalog number |
| Voltage | Confirm 460 V AC class |
| Rated Speed | Confirm 3000 rpm |
| Continuous Torque | Confirm 8.25 N·m is sufficient |
| Peak Torque | Confirm approximately 20.3 N·m is sufficient |
| Power | Confirm approximately 2.1 kW |
| Feedback | Confirm resolver compatibility |
| Shaft | Confirm keyed shaft requirement |
| Brake | Confirm that no integral brake is acceptable |
| Flange | Confirm 130 mm frame and mounting arrangement |
| Stack Length | Confirm 76.2 mm stack |
| Connector | Confirm SpeedTEC DIN compatibility |
| Cable Routing | Allow for right-angle connector |
| Weight | Allow for approximately 9.5 kg |
| Mechanical Load | Check radial and axial shaft loads |
| Environment | Check temperature, dust, moisture, oil, and coolant |
| Shaft Area | Confirm whether additional protection is necessary |
| Drive | Confirm compatible servo amplifier |
| Motion Profile | Verify acceleration and deceleration requirements |
33. Product Advantages at a Glance
| Advantage | Description |
|---|---|
| Low-inertia rotor | Fast dynamic response |
| 3000 rpm rating | Balanced speed and torque |
| 8.25 N·m continuous torque | Strong continuous output |
| 20.3 N·m peak torque | Useful short-term acceleration capability |
| Resolver feedback | Robust closed-loop position feedback |
| Keyed shaft | Conventional mechanical connection |
| No integral brake | Simple configuration for non-braked axes |
| 130 mm frame | Compact industrial package |
| 76.2 mm stack | Balanced motor geometry |
| Right-angle connector | Easier cable routing |
| 180° connector rotation | Flexible installation |
| IEC metric mounting | Convenient machine integration |
| Brushless construction | Suitable for servo operation |
| High-cycle capability | Suitable for repetitive automation |
34. Typical Machine Categories
The MPL-B4530F-RJ72AA can be considered for the following machine categories:
- Packaging machines
- Filling equipment
- Labeling systems
- Cartoning machinery
- Automated assembly machines
- Rotary indexing tables
- Material-handling equipment
- Conveyor positioning systems
- Automated feeders
- Pick-and-place mechanisms
- Inspection machines
- Machine-tool auxiliary axes
- Automated production lines
- Transfer mechanisms
- Precision positioning systems
- Automated processing machinery
- General industrial automation equipment
- Servo-controlled rotary axes
35. Technical Summary
| Category | Specification |
|---|---|
| Model | MPL-B4530F-RJ72AA |
| Brand | Allen-Bradley |
| Product Family | MP-Series |
| Product Series | MPL Low-Inertia Brushless Servo Motors |
| Motor Type | Rotary AC servo motor |
| Voltage Class | 400 V AC class |
| Armature Voltage | 460 V AC |
| Rated Speed | 3000 rpm |
| Maximum Speed | 3000 rpm |
| Continuous Stall Torque | 8.25 N·m |
| Peak Stall Torque | 20.3 N·m |
| Rated Continuous Power | Approx. 2.1 kW |
| Frame Size | 45 |
| Frame Dimension | 130 mm / 5.12 in. |
| Magnet Stack | 76.2 mm / 3.0 in. |
| Feedback | Resolver |
| Shaft | Keyed |
| Shaft Key | Yes |
| Shaft Seal | No |
| Brake | No integral brake |
| Connector | SpeedTEC DIN |
| Connector Configuration | Right-angle |
| Connector Rotation | 180° |
| Mounting | IEC metric flange |
| Mounting Hole Type | Free mounting holes / FF |
| Rotor Inertia | Approx. 0.00040 kg·m² |
| Approximate Weight | 9.5 kg |
| Typical Operating Temperature | Up to approximately 40 °C |
| Primary Application | Industrial servo motion control |
36. Final Product Description
The Allen-Bradley MPL-B4530F-RJ72AA is a low-inertia brushless AC servo motor designed for industrial automation systems that require controlled, repeatable, and responsive rotary motion.
Its 130 mm frame, 76.2 mm magnet stack, 3000 rpm rated speed, 8.25 N·m continuous stall torque, and approximately 20.3 N·m peak torque provide a balanced combination of speed and torque for a wide range of servo applications.
The most important characteristic of this particular model is its resolver feedback system.
The resolver provides reliable rotary position feedback for closed-loop servo operation and makes this configuration particularly suitable for motion systems that have been designed around resolver-based feedback.
The motor also features a keyed shaft extension, making it convenient for machines using conventional keyed couplings and mechanical transmission components.
Unlike brake-equipped configurations, the MPL-B4530F-RJ72AA does not include an integral motor brake.
This can be an advantage in horizontal applications or other machine axes where a motor-mounted holding brake is unnecessary.
The right-angle SpeedTEC DIN connector, together with its approximately 180° rotational adjustment, provides useful flexibility for motor installation and cable routing.
The low-inertia rotor is well suited to repeated acceleration, deceleration, reversing, and indexing operations.
For packaging equipment, assembly machinery, material-handling systems, indexing tables, automated production lines, precision positioning systems, and other industrial servo applications, the motor offers a practical combination of dynamic response, torque capability, resolver feedback, and conventional keyed mechanical construction.
In summary, the MPL-B4530F-RJ72AA can be characterized by the following key features:
3000 rpm operation, 8.25 N·m continuous stall torque, approximately 20.3 N·m peak torque, approximately 2.1 kW continuous power, 130 mm frame size, 76.2 mm magnet stack, resolver feedback, keyed shaft, no integral brake, right-angle DIN connector, low rotor inertia, and approximately 9.5 kg motor weight.
For applications where a resolver-based servo motor is required and an integrated holding brake is not necessary, the MPL-B4530F-RJ72AA is a practical member of the MPL low-inertia servo motor family.