Allen-Bradley MPL-B420P-HK74AA Low-Inertia Servo Motor
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||

Allen-Bradley MPL-B420P-HK74AA Low-Inertia Servo Motor
The Allen-Bradley MPL-B420P-HK74AA is a low-inertia brushless AC servo motor from Rockwell Automation’s MP-Series MPL family. Designed for industrial automation and precision motion control, it features a 460/480 V AC voltage class, a rated speed of 5000 RPM, incremental encoder feedback, a keyless shaft extension, and an integrated 24 V DC holding brake. Its 115 mm frame and rotatable right-angle SpeedTEC DIN connector make it suitable for automated machinery requiring accurate positioning and dependable motion control. This model was discontinued by the manufacturer on July 23, 2024, with MPL-B420P-SK74AA listed as its engineering replacement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Manufacturer | Rockwell Automation |
| Model | MPL-B420P-HK74AA |
| Product Type | Low-Inertia Brushless AC Servo Motor |
| Product Series | MP-Series MPL |
| Voltage Class | 460/480 V AC |
| Frame Size | 115 mm (4.53 in.) |
| Magnet Stack Length | 50.8 mm (2.0 in.) |
| Rated Speed | 5000 RPM |
| Continuous Torque | Approx. 4.74 Nm |
| Peak Torque | Approx. 13.5 Nm |
| Rated Power Class | Approx. 1.9 kW |
| Feedback Type | Incremental encoder |
| Encoder Resolution | 2000 lines per revolution |
| Shaft Configuration | Keyless shaft extension |
| Shaft Seal | Not included |
| Holding Brake | 24 V DC |
| Connector Type | Circular SpeedTEC DIN connector, right-angle, 180° rotatable |
| Mounting | IEC metric flange, free mounting holes (Type FF) |
| Approximate Weight | 6.80 kg (15.0 lb) |
| Dimensions | 115 mm frame with a 50.8 mm magnet stack; confirm overall length and mounting dimensions using the mechanical drawing |
| UPC | 820919980749 |
| Lifecycle Status | Discontinued |
| Engineering Replacement | MPL-B420P-SK74AA |
FAQ
Q1: What is the Allen-Bradley MPL-B420P-HK74AA?
A: It is a low-inertia brushless AC servo motor designed for industrial automation, positioning, and closed-loop motion-control applications.
Q2: What voltage class does this motor use?
A: It belongs to the 460/480 V AC voltage class. Confirm the exact motor nameplate and compatible drive requirements before installation.
Q3: What is the rated speed of this servo motor?
A: Its rated speed is 5000 RPM, making it suitable for applications requiring controlled, high-speed rotary motion.
Q4: What feedback system does the MPL-B420P-HK74AA use?
A: It uses an incremental encoder with a resolution of 2000 lines per revolution. The connected servo drive must support the appropriate feedback interface.
Q5: Does this model include a holding brake?
A: Yes. It includes a 24 V DC holding brake that helps hold the shaft when engaged. It should not replace a safety-rated braking system where one is required.
Q6: What shaft and connector configurations does it have?
A: The motor features a keyless shaft extension and a right-angle SpeedTEC DIN connector that can rotate through 180 degrees. It does not include a shaft seal.
Q7: What are the dimensions and weight of this motor?
A: It has a 115 mm frame and a 50.8 mm magnet stack, with an approximate weight of 6.80 kg. Consult the mechanical drawing for exact overall length, shaft measurements, and mounting-hole positions.
Q8: What should be checked before replacing this motor?
A: Verify the full catalog number, voltage class, encoder compatibility, shaft and coupling dimensions, brake voltage, connector orientation, mounting pattern, and drive compatibility. Since this model is discontinued, confirm the suitability of the proposed replacement before purchasing or commissioning it.
Allen-Bradley MPL-B420P-HK74AA Low-Inertia Servo Motor is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Company Introduction
Xiamen Shengruite Trading Co., Ltd. is a company specializing in the supply of industrial PLC spare parts.
We provide high-quality PLC spare parts to customers in the global manufacturing, energy and power, chemical and other fields.
Since its establishment in 2011, after 13 years of rapid development, the cumulative global shipments have reached 223,650 pieces, with an annual output value of US$50 million.
Successfully served more than 500 customers in more than 100 countries and regions including Saudi Arabia, UAE, the United States, Europe, Africa, and Southeast Asia
Our Mission
Provide customers with the best quality PLC spare parts and the fastest delivery service to ensure that their industrial automation systems are always in the best operating condition.
We provide a 1-year warranty service, and we support returns and exchanges for any issues to ensure your rights and interests are fully protected.
We can provide detailed product images upon request, and our team can arrange warehouse photos for confirmation to ensure you have all the information you need before making a purchase.
Shipping times vary depending on your location. With the support of our 16 global warehouses, we strive to deliver orders as quickly as possible. Contact us to get an estimated delivery time for your specific location.
The minimum order quantity (MOQ) is typically one unit. However, for larger orders, please contact us for potential discounts and pricing details.
Yes, we offer competitive pricing for bulk purchases. Please reach out to our sales team with the specifics of your order to receive a custom quote.
We accept various payment methods for wholesale orders, including bank transfers (T/T), letters of credit, and other options upon agreement. For large transactions, please contact us directly for payment terms.
Yes, we offer flexible ordering options for both small and large quantities. Whether youre looking for a single unit or a large batch, we can accommodate your needs.
We occasionally offer promotional discounts for new wholesale customers. Contact us to learn more about any current offers available for first-time buyers.
If you are unsure of compatibility with your existing setup please provide your system details and our support team can verify compatibility prior to purchase.
Returns are accepted within 30 days if the product is unused, unopened, and in its original packaging. Please note that return shipping and associated costs are the buyer\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’s responsibility.
Yes, we offer technical support for the installation and integration of our products. Our team can assist with setup, configuration, and troubleshooting to ensure a smooth installation.








