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MANUFACTURER: Control Techniques



4 in stock
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2 Year warranty


Part NumberUNI3404
ManufacturerControl Techniques
Model #UNI3404
TypeAC Drives
Warranty2 Year
Operating ModesOpen Loop
Closed Loop vector
Nominal Rating - kW30
Nominal Rating - hp40
Max. Continuous Output Current at 40°C ambient (A)
Max. Continuous Output Current at 50°C ambient (A)
Typical Input Current (A)52
Max. Continous Output Current (A)66
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 UNI3404 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 UNI3404 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 UNI3404, 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

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  • Order within the next 7 hours and 6 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty UNI3404 for credit when ordering from MRO Electric

Additional Information

Control Techniques UNI3404 Overview

The Unidrive module UNI3404 is a variable speed module manufactured by Control Techniques for the AC driveline for induction and servo motors. It is a 400 V, 30 kW size 3 AC drive with 40 hp and 60 amps.

The typical input current 52 A and the maximum continuous input current is 66 A.  The fuse rating is 70 A, and the cable size is 16 mm 24 AWG. AC1 is the recommended AC supply for the Control Techniques UNI3404.


The Control Techniques UNI3404 drive module is a bookcase mounted, size three variable speed drive that is designed to work with appropriate motors, controllers, and other components for your manufacturing needs to realize complete end products or systems. The 400V drive ratings (380V to 480V ±10%) for this module are 30 kW at 380 V, and 40 hp at 460 V. The output current for the drive unit UNI3404 is 60 A, and the input current is typically 52 A.

The label of the Control Techniques Unidrive UNI3404 contains the module number which carries valuable information. UNI indicates Unidrive, the first number of the module indicates the model size. The second number indicates the voltage rating, in this case, it is 4, for 400 V. The last two numbers of the part indicate the power rating of the module. 

RFI filters, or electromagnetic interference filters, are available for the Control Techniques UNI3404 to help mitigate the high-frequency Electromagnetic noise that exists on power and signal lines.

The output currents that are listed for the Control Techniques Unidrive UNI3404 are listed for a max of 40°C (104°F) ambient, 1,000m altitude, and 3kHz switching.

For frequencies that are higher than the rating, derating is necessary for higher switching frequencies, ambient temperatures >40°C (104°F), and high altitudes.

The Unidrive UNI3404 includes overloads and operating modes as standard industrial. 

Additionally, it features low acoustic noise 9kHz default switching frequency S4 duty cycle.

The Control Techniques size 3 variable speed drive UNI3404 features an upper and a lower display on the top front of the module with programming keys. There are control keys beneath the programming keys.  The control keys are for forwarding/reversing, stopping/reseting, and Run modes. Next is the large option module connection followed by the small option module connection. 

On the bottom front of the module are two available connections. One connection for an encoder and a second connection for control connectors.


The Control Techniques UNI3404 variable speed drive requires no additional short-circuit protection device as the output circuit has quick-acting short-circuit protection. What does the quick-acting electronic short circuit protection do? It limits the fault current to no more than 5 times the rated output current. This interrupts the current in about 20µs.

As long as the motor rate current suits the motor, the Control Techniques UNI3404 variable speed drive provides overload protection for both the motor and the cables that are connected.

The Control Techniques size 3 variable speed drive UNI3404 comes with a two-year warranty.

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 UNI3404, take a look at more from our Unidrive 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 serviceon all of our 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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MRO was very communicative with keeping us updated on our order. There was a slight delay in shipping, but Joe kept us u...