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Starting at $899.00
Convert 240V to 208V for equipment designed to operate on lower voltage power.
Commonly used in CNC machines, commercial equipment, and industrial systems requiring 208V from a 240V supply.
Built in partnership with Hammond Power Solutions for proven industrial performance.
| Maximum Amps by Voltage | |||||
| Transformer Size (KVA) | 208v | 240v | 380/400v | 480v | 600v |
| 9 | 25 | 21.7 | 13 | 10.8 | 8.66 |
| 15 | 41.6 | 36.1 | 21.7 | 18 | 14.4 |
| 30 | 83.3 | 72.2 | 43.3 | 36.1 | 28.9 |
| 45 | 125 | 108 | 65 | 54.1 | 43.3 |
| 75 | 208 | 180 | 108 | 90.2 | 72.2 |
| 112 | 312 | 271 | 162 | 135 | 108 |
| 150 | 416 | 361 | 216 | 180 | 144 |
Technical specifications for 240 to 208 Volt Auto Transformers:
Input Voltage
Output Voltage
208V, 3 Phase
KVA Ratings
9, 15, 30, 45, 75
Frequency
Transformer Type
Auto-Transformer
Cooling
Enclosure
Certifications
Configuration Options
Delta-Delta, Wye-Wye (Learn More)
Dimensions & Weight
KVA
Weight
Dimensions (L × W × H)
9
49 lbs
15
67 lbs
30
115 lbs
45
130 lbs
75
150 lbs
Bidirectional Operation
Can be configured to step voltage down (240V to 208V) or step voltage up (208V to 240V).
Auto-Transformer Design
Uses a shared winding to convert voltage efficiently without electrical isolation.
Delta or Wye Configuration
Available in Delta-Delta or Wye-Wye configurations to match your system requirements. Learn More.
Application Use
Used in CNC machines, industrial equipment, HVAC systems, pumps and compressors, and manufacturing equipment requiring 208V power.
This transformer is backed by a 1-year manufacturer’s warranty from Hammond Power Solutions. For support or questions, contact our team.
Our Advantages
In-stock transformers ship fast so you can keep your operation running.
We partner with Hammond Power Solutions, a leading manufacturer of industrial transformers, to deliver reliable, high-quality performance in demanding environments.
From common voltage conversions to specialized applications, we stock a wide range of transformer configurations ready to go. If you don’t see what you need, we can source it.
Choosing the right transformer matters. Our team helps you size and select the correct unit based on your equipment, voltage, and load requirements.
Real experiences from people who trust our products
My old rotary phase converter gave 30 years of faithful service before it went up in smoke. With customers asking when I’d be operational, I researched every manufacturer and the choice was clear on American Rotary. First impression when it ... READ MORE
FAA Certified Machine Shop Owner
Very good company to do business with. The salesman Lenny treated me like I was a big company. I was shopping for a roto phase for my home machine shop. He had all the time in the world for me. ... READ MORE
Rodney Mears
A quick google search pointed me toward American Rotary. It wasn’t their website or their pricing but the number of videos and testimonials about the quality of their product and the great service. I wasn’t disappointed. I called on a ... READ MORE
Carl DiPaolo
I purchased this unit for a tenant in a commercial property that needed 3 phase power and the cost for the utility company to bring it in was significantly higher with much longer times to complete the project. The phase ... READ MORE
Matt Peace
I tried an inexpensive digital converter that made my machine motors very hot due to unbalanced power. A person I bought a milling machine from said he had an American Rotary and was very happy with the quality, so I ... READ MORE
Brad Everett
When I started, the garage had a single 120 V receptacle behind a shelf. Now, there (4) duplex 120A receptacles, (1) NEMA 16,20 A 240/120V with a DPDT switch to select voltages. 30A 50A 1 phase receptacles. Two 20A, one ... READ MORE
Raymond Jensen
I called in a talked to a representative told them I have a refrigeration unit I was looking to run 3 phase to, gave them the specs and was recommended the ADX 10. I ordered it super fast shipping got ... READ MORE
Jonathan Arrington
I had to move my workshop due to rent increases. The one I found didn’t have 3 phase. I found some cheap crappy digital shifter…didn’t work. Then I found American Rotary, they are the real deal! I am able to ... READ MORE
Mike Chinn
para todos los hispanohablantes America Rotary 100% recomendado fácil de instalar fácil de manejar fácil de cablear todo perfectamente gracias por su ayuda para poner en funcionamiento mi máquina edgebanding 3 Phase For all Spanish speakers, American Rotary 100% recommended. ... READ MORE
Neftaly Bustos Custom
Just got my ADX 5 up and running couldn’t be happier with my decision to purchase this excellent customer service and tech support. A++++++
... READ MOREMark Anderson
Absolutely love what american rotary does. Had a wonderful experience with their support team the phase converter we purchased and the transformer were supper easy to install definitely recommend buying from them. Customer service is 10/10
... READ MORECustom Machined Concepts | Andrey Girenko
American Rotary is an awesome company to work with, Mike was/is very helpful in answering my questions and getting me what I needed to get my shop ready for a new machine, giving me an option to either piggy back ... READ MORE
Charles Nelson
Select the kVA based on your equipment voltage and total load. Use our sizing guide or contact our team to confirm the correct size.
Match the configuration to your system requirements. Learn more here. If unsure, we can help you confirm before ordering.
Many sizes are available for fast shipping. For current availability, call 888-743-6832 or contact our team.
