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Control Techniques UNI4401


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  • 2 Year Warranty
Part NumberUNI4401
ManufacturerControl Techniques
TypeAC Drives
Warranty2 Year
Operating ModesOpen Loop
Closed Loop vector
Nominal Rating - kW45
Nominal Rating - hp75
Max. Continuous Output Current at 40°C ambient (A)
Max. Continuous Output Current at 40°C ambient (A)
Typical Input Current (A)76
Max. Continous Output Current (A)98
Minimum Resistance (Ω)5
Instantaneous Powe Rating (kW)120

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed UNI4401 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this UNI4401 we also repair a wide range of other Control Techniques products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty UNI4401, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 115lbs

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Ask about exchanging your faulty UNI4401 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Control Techniques UNI4401 Overview

Control Techniques UNI4401 AC Drive

The Control Techniques UNI4401 is an advanced AC drive designed to meet the demanding needs of modern industrial applications. This high-performance drive excels in operating modes, including open loop, closed loop vector, servo, and regenerative (regen) modes. It is a versatile solution for numerous automation and control scenarios. Its robust design and sophisticated features ensure efficient and reliable operation, enhancing productivity and performance in diverse settings.

High Power and Performance

The UNI4401 boasts a nominal rating of 45 kW (75 hp), providing substantial power to drive large industrial machinery and processes. Its maximum continuous output current at a 40°C ambient temperature varies depending on the switching frequency, offering flexibility and adaptability to different operational requirements. It can deliver a maximum continuous output current of 96 A at 3 kHz and 4.5 kHz, 88 A at 6 kHz, and 70 A at 9 kHz. This adaptability ensures that the drive can maintain optimal performance across a range of frequencies, catering to the specific needs of various applications.

Precision Control in Diverse Modes

The UNI4401 operates efficiently in open-loop and closed-loop vector modes, providing precise speed and torque control essential for complex machinery. It offers exceptional accuracy and responsiveness in servo mode, which is crucial for applications requiring exact positioning and rapid adjustments. The regenerative mode (regen) allows the drive to recover energy, contributing to energy savings and operational efficiency. These versatile operating modes make the UNI4401 ideal for industries requiring high precision and dynamic control.

Advanced Thermal Management

Designed to operate in demanding environments, the UNI4401 features advanced thermal management capabilities. It can handle different maximum continuous output currents at elevated switching frequencies, ensuring stable and reliable performance even under strenuous conditions. For instance, it maintains 95 A at 3 kHz, 85 A at 4.5 kHz, 75 A at 6 kHz, and 60 A at 9 kHz in high-temperature environments. This capability underscores the drive's robustness and suitability for continuous, heavy-duty operations.

Efficient Power Utilization

The UNI4401's typical input current is 76 A, reflecting its efficient power consumption profile. It can deliver a maximum continuous output current of 98 A, demonstrating its ability to provide consistent power to demanding applications. The drive also features a minimum resistance of 5 ohms, contributing to its efficient power handling and distribution. This combination of features ensures that the UNI4401 operates with high efficiency, minimizing energy waste and optimizing performance.

Exceptional Instantaneous Power Rating

One of the standout features of the UNI4401 is its instantaneous power rating of 120 kW. This high power capability allows the drive to handle sudden load changes and peak demands effectively, ensuring smooth and uninterrupted operation. This feature is particularly beneficial in applications where load conditions vary rapidly, providing the necessary power boost to maintain performance and prevent downtime.

Frequently Asked Questions about Control Techniques UNI4401 AC Drive

What is the nominal power rating of the UNI4401 AC Drive?

The nominal power rating of the UNI4401 AC Drive is 45 kW (75 hp). This rating indicates the drive's capacity to handle substantial power loads, making it suitable for large industrial machinery and demanding applications.

In which operating modes can the UNI4401 function?

The UNI4401 AC Drive can operate in several modes: open loop, closed loop vector, servo, and regenerative (regen) modes. These modes provide flexibility and precision, allowing the drive to cater to various industrial requirements and control scenarios.

What is the maximum continuous output current at different frequencies?

The maximum continuous output current at a 40°C ambient temperature varies depending on the switching frequency:

  • At 3 kHz: 96 A
  • At 4.5 kHz: 96 A
  • At 6 kHz: 88 A
  • At 9 kHz: 70 A

This adaptability ensures the drive can maintain optimal performance across different operational frequencies.

What is the typical input current for the UNI4401?

The typical input current for the UNI4401 is 76 A. This indicates the amount of current the drive typically draws from the power source, reflecting its efficient power consumption.

How does the UNI4401 handle thermal management?

The UNI4401 is designed to handle different maximum continuous output currents at elevated switching frequencies, ensuring stable performance even under high-temperature conditions. For example, it maintains:

  • 95 A at 3 kHz
  • 85 A at 4.5 kHz
  • 75 A at 6 kHz
  • 60 A at 9 kHz

This robust thermal management makes it suitable for continuous, heavy-duty operations.

What is the minimum resistance of the UNI4401, and why is it important?

The UNI4401's minimum resistance is 5 ohms. This low resistance value is important because it contributes to the efficient power handling and distribution within the drive, reducing energy losses and improving overall performance.

What is the instantaneous power rating of the UNI4401?

The UNI4401's instantaneous power rating is 120 kW. This high power rating allows the drive to effectively handle sudden load changes and peak demands, ensuring smooth and uninterrupted operation, especially in applications with variable load conditions.

Can the UNI4401 be used for regenerative braking?

Yes, the UNI4401 can be used for regenerative (regen) braking. In regenerative mode, the drive can recover energy during braking processes, contributing to energy savings and enhancing operational efficiency.

What makes the UNI4401 suitable for industrial applications?

The UNI4401 is suitable for industrial applications due to its high power rating, versatile operating modes, robust thermal management, and efficient power utilization. Its ability to operate in open loop, closed loop vector, servo, and regenerative modes allows it to meet modern industrial environments' precise control and dynamic performance needs.

How does the UNI4401 ensure energy efficiency?

The UNI4401 ensures energy efficiency through its typical input current of 76 A and a low minimum resistance of 5 ohms. Additionally, its regenerative braking capability allows it to recover and reuse energy, enhancing efficiency and reducing operational costs.

Contact Us Today For More Information About Control Techniques Products

Check out the rest of our Control Techniques product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like UNI4401, take a look at more from our AC Drives line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our UNI4401 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

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