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MANUFACTURER : Control Techniques  




4 in stock

2 Year warranty
Part NumberUNI3405
ManufacturerControl Techniques
Model #UNI3405
TypeAC Drives
Warranty2 Year
Operating ModesOpen Loop
Closed Loop vector
Nominal Rating - kW37
Nominal Rating - hp50
Max. Continuous Output Current at 40°C ambient (A)
Max. Continuous Output Current at 50°C ambient (A)
Typical Input Current (A)66
Max. Continous Output Current (A)82
Minimum Resistance (Ω)10
Instantaneous Powe Rating (kW)60

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 UNI3405 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 UNI3405 we also repair drives, motors, PLCs and more, 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 UNI3405, 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 : 65lbs

Want it shipped tomorrow?

  • Order within the next 22 hours and 27 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty UNI3405 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.

Additional Information

Control Techniques UNI3405 Overview

The UNI3405 Unidrive Classic is a size 3 drive with a nominal rating of 37kW and 50hp. The output current for the drive is 70A while the typical input current is 66A. It is recommended that after every 4 years the capacitors are reformed to keep the drive running in good function.


Located on the top surface of the control pod, every UNIDRIVE unit bears a label with an identifiable nameplate with the drive identification and description clearly visible. This is an efficient way to ensure the drive with the correct power ratings and approvals is selected. What pertinent information is available on the label? The top left number is the model followed by the drive type and the power rating. The final info on that line is the customer and date code. Beneath the model’s number/name are the drive ratings. It is here you find such things as the voltage, current, overload, and software version displayed in both input and output values. Under the ratings are the serial no. and a bar code. The approvals are listed to the right of the ratings.


All frame size Unidrive standard industrial models have four operating modes. The four operating modes are for constant torque loads. The four modes are open-loop, closed-loop vector, servo, and regen modes. Overload for open-loop is 150 % for 60 seconds, for closed-loop vector 175 % for 60 seconds (for size 3 UNI3405), servo 175 % for 40 seconds (for size 3 UNI3405), and regen 150 % for 60 seconds.

How to use a UNI3405

The UNI 3405 is used in open-loop mode (OL) with standard AC induction motors. The drive applies power to the motor at frequencies the user can vary. The speed of the motor results from the output frequency of the drive and slip from the mechanical load. Motor performance is improved by this UNI3405 drive when it applies for slip compensation. You can alter the low-speed performance by choosing either V/f or open-loop vector mode.

Understanding the keypad display is key to getting the most from your UNI3405 unit. On the front display, two horizontal rows contain 7 segment displays. The Parameter value or the specific trip type is displayed on the upper display while the lower display demonstrates drive status or the current menu as well as the parameter number being viewed. The control buttons are directly beneath the keypad display. The control buttons consist of four arrow buttons used to navigate the parameter structure and altering parameter values. There is one mode button that is used to change between each of the display modes. The modes you may select on this menu are three: parameter view, parameter edit, and status. Finally, there are three control buttons. The control buttons give you control of the drive if you have selected keypad mode. The three selections for the control button start, stop, and forward / reverse. The start button is green, the stop button is red, and the forward/reverse button is blue. You may also use the stop button (red) to reset the drive. 

Product Description

The UNI3405 is a Size 3 AC DRIVE 50HP 460V that is manufactured by Control Techniques. These products are manufactured in United Kingdom and are designed for Metal production, paper processing, and material conveying usage. All of the products come with a 2 year warranty from MRO Electric. We also carry AC Drives from other manufacturers such as Siemens and Yaskawa.

Related 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 sending us an email at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like UNI3405, 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 UNI3405 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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