20 HP Phase Converter

General Purpose Rotary Phase Converter

The 20 hp/20 kVA phase converter from American Rotary is designed to power most loads up to 10 hp or 28 amps.


The AR20 is a great solution due to its reliability and affordable price tag.


It was designed and is best suited for general or light duty loads up to 10 hp.


An example of these loads would be a drill press.


The AD20 is the perfect solution for voltage-sensitive equipment such as welders, ovens, EDMs, and CNCs. It was designed with our microsmart controller to give you more precise power and efficiency.


Benefits of the AD20 include reliability, precision, and longevity.


The ADX20 is our most versatile series designed to give you the cleanest, most balanced power for high inertia loads such as pumps, air compressors, and equipment with a flywheel, yet it is able to handle the most sensitive type of loads. Advantages to the ADX20 include our CTR Technology which allows for on-demand call of power for the toughest starting loads. Making the ADX20 the best choice for consumers.


The AUL20 offers the same great technology as the ADX20, but it comes with a UL registration needed in certain applications. Ask your electrician if UL registration is required in your installation.


The AI20 takes the precision and power of the ADX20 and packs it into a fully enclosed NEMA 3R-rated enclosure. Advantages to the AI20 include a lifetime wash down filter, solar reflective paint, and a 3R weatherproof enclosure allowing you to put the AI20 outdoors or indoors. So whether it is dust or the outside elements you are looking to protect your equipment from, you will benefit from the A120 phase converter.


Rest assured that whichever American Rotary model you choose, it will give you many years of reliable power and is backed by its lifetime warranty.


The ARAD, ADX, and AUL models are available in floor mount and wall mount configurations. Some assembly required.

Phase Converter Wizard

When sizing for a Rotary Phase Converter it is best to size with a 2:1 ratio to ensure you will have enough starting capacity. This sizing guideline will protect your equipment long term and ensure it performs at its highest efficiency.

Try out our Phase Converter Wizard by selecting your equipment type and inputting its total HP rating to see which converter series and size would be best for you.


Phase Converter for Welder

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AI - Industrial Phase Converter

Industrial Grade Phase Converter

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ADX - Smart Phase Converter

Extreme Duty Digital Rotary Phase Converter

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AD - Digital Phase Converter

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AR - Pro Phase Converter

General Purpose Rotary Phase Converter

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For models 75 and larger please call us at 1.888.743.6832

Build your phase converter

Start with our Sizing Chart

20 HP Phase Converter



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