Product Overview and Technical Characteristics

The MPL-B330P-HK74AA combines a 100 mm frame with a 76.2 mm magnet stack to provide a useful balance between motor size, torque capability, and dynamic response. It is a 460 V servo motor with a 2000-line incremental encoder and 24 V DC brake.

Its keyless shaft, right-angle SpeedTEC DIN connector, and IEC metric mounting configuration make it suitable for integration into established MP-Series motion platforms. For replacement projects, engineers should compare the complete motor configuration rather than relying only on the model family or frame size.

Technical Specifications

Specification	MPL-B330P-HK74AA
Manufacturer	Allen Bradley / Rockwell Automation
Product Series	MP-Series MPL
Product Type	Low-Inertia Brushless Servo Motor
Motor Type	Rotary Servo Motor
Voltage Rating	460 V AC
Voltage Class	400 V Class
Frame Size	100 mm
Magnet Stack Length	76.2 mm (3.0 in.)
Rated Speed	5000 RPM
Feedback	2000-Line Incremental Encoder
Brake	24 V DC Holding Brake
Shaft	Keyless Shaft Extension
Connector	SpeedTEC DIN, Right Angle
Connector Rotation	180°
Mounting	IEC Metric Flange
Enclosure	Keyless Shaft Configuration
Weight	4.60 kg / 10.14 lb
Overall Dimensions	Refer to the applicable mechanical drawing for installation clearance and mounting dimensions

Recommended Related Models

Model	Product Type	Key Difference
MPL-B330P-HK72AA	MP-Series Servo Motor	100 mm frame, keyless shaft, no brake
MPL-B330P-HJ74AA	MP-Series Servo Motor	100 mm frame, keyed shaft, 24 V DC brake
MPL-B330P-HJ72AA	MP-Series Servo Motor	100 mm frame, keyed shaft, no brake
MPL-B330P-SK74AA	MP-Series Servo Motor	Engineering replacement option with 24 V DC brake
MPL-B320P-HK74AA	MP-Series Servo Motor	100 mm frame with shorter 50.8 mm stack and brake

Popular Related Models

For replacement, retrofit, and motion-system projects, the following MP-Series motors are commonly compared with the MPL-B330P-HK74AA:

MPL-B330P-HK72AA — keyless shaft, no brake
MPL-B330P-HJ72AA — keyed shaft, no brake
MPL-B330P-HJ74AA — keyed shaft, 24 V DC brake
MPL-B330P-SK74AA — engineering replacement configuration
MPL-B320P-HK74AA — 100 mm frame, shorter magnet stack, keyless shaft and brake
MPL-B320P-MK72AA — 100 mm frame, multi-turn high-resolution feedback configuration

For a replacement project, the brake configuration, feedback type, shaft arrangement, stack length, and servo-drive compatibility should all be checked before selecting an alternative.

Where the MPL-B330P-HK74AA Fits Best

The MPL-B330P-HK74AA can be used in a wide range of industrial motion-control applications, including:

Packaging and filling machinery
Material handling equipment
Automated assembly systems
Machine tools
Printing and converting equipment
Semiconductor and electronics manufacturing equipment
Conveyor positioning systems
Pick-and-place machinery
High-speed indexing mechanisms
Automated production lines

The integrated 24 V DC holding brake is particularly useful for vertical axes and applications where the load needs to remain mechanically supported while the servo is stopped or powered down.

Key Advantages for Industrial Motion Applications

Low-inertia servo construction
The MPL-B330P-HK74AA belongs to the MP-Series low-inertia servo motor family. Its low-inertia design helps provide responsive acceleration and deceleration for dynamic machine movements.

5000 RPM speed capability
With a rated speed of up to 5000 RPM, the motor can support high-cycle machinery where fast positioning and short machine cycles are important.

2000-line incremental encoder
The incremental encoder supplies position and speed feedback to the servo drive, supporting closed-loop control and accurate motion regulation.

24 V DC holding brake
The built-in brake provides mechanical holding capability when the motor is not actively producing torque. This is valuable for vertical or gravity-loaded axes.

Keyless shaft configuration
The motor uses a keyless shaft extension, allowing machine designers to select appropriate coupling arrangements while maintaining a compact mechanical interface.

Rotatable SpeedTEC DIN connector
The right-angle connector can be rotated up to 180 degrees, providing greater flexibility when routing motor cables inside a machine enclosure.

Technical FAQs

1. What voltage does the MPL-B330P-HK74AA servo motor use?
The motor has a 460 V armature-voltage rating and belongs to the 480 V AC MP-Series servo motor family. The associated servo drive must be properly matched to the motor's electrical characteristics.

2. What is the maximum speed of the MPL-B330P-HK74AA?
The rated speed is 5000 RPM. The actual operating speed should be established according to the servo drive configuration, machine load, acceleration requirements, and application conditions.

3. What type of feedback does this servo motor provide?
The MPL-B330P-HK74AA uses a 2000-line incremental encoder. The feedback device provides the servo system with motor position and speed information required for closed-loop control.

4. Does the MPL-B330P-HK74AA include a holding brake?
Yes. This model is equipped with a 24 V DC holding brake. The brake is intended for holding the motor/load rather than serving as the primary means of dynamic stopping.

5. Is the motor shaft keyed?
No. The MPL-B330P-HK74AA uses a keyless shaft extension. The coupling and mechanical connection should therefore be selected to suit the keyless shaft configuration.

6. What is the magnet stack length?
The motor has a 30-series magnet stack with a length of 76.2 mm, or 3.0 inches.

7. What type of connector is used?
It uses a SpeedTEC DIN connector with a right-angle configuration. The connector can be rotated up to 180 degrees, which can simplify cable routing during machine installation.

8. What type of applications are suitable for this motor?
It is well suited to high-speed positioning, indexing, packaging, material handling, assembly, machine-tool, and other automated motion applications requiring closed-loop servo control.

9. What should be checked when replacing an existing MPL servo motor?
The replacement should be checked against the original motor's voltage class, feedback type, brake configuration, shaft design, frame size, stack length, connector arrangement, and compatible servo-drive configuration. Mechanical and electrical compatibility should both be confirmed before installation.

10. Is the MPL-B330P-HK74AA still manufactured?
Rockwell Automation lists the MPL-B330P-HK74AA as discontinued, with July 23, 2024 shown as the discontinuation date. An engineering replacement, MPL-B330P-SK74AA, is listed by Rockwell Automation. Existing systems can therefore require replacement planning or an engineering assessment when this motor is no longer available.

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