SyMAX®-i Motor

The Power of the SyMAX®-i

What is the SyMAX®-i?

Marathon’s SyMAX®-i motor is a permanent magnet motor solution designed for indoor and outdoor environments. These motors can be installed as drop-in replacements for induction motors in both vertical shaft-up and horizontal orientations.

Today, Marathon builds on its legacy of innovative and efficient motor designs by joining magnetic fields and motors into a single leading technology. This allows for unparalleled power densities, unprecedented performance, and unmatched efficiencies.

It’s What’s Inside That Makes the Difference

The power of permanent magnets and Marathon’s intelliDrive technology.


A permanent magnet motor offers a simple design with powerful magnets creating a constant flux in the air gap of the motor, eliminating the need for the rotor windings and brushes normally used in synchronous motors. By combining the highly accurate performance of a synchronous motor into the robust design of a standard induction motor, the PMAC energizes directly on the stator by way of a variable speed drive. Now, what does that mean for customers? You’ll see reduced energy losses and maximization of output opportunities.

Thanks to this permanent magnet motor technology, the SyMAX®-i is capable of delivering high-efficiency outputs over a wide range of RPMs.


Marathon’s integrated drive solution, intelliDrive, elevates the SyMAX®-i motor from being like any other permanent magnet motor and created greater control of the motor’s constant torque to deliver optimum outputs.


In addition to heightened performance and control, permanent magnet motors by nature operate at a noticeably reduced noise level thanks to internal magnets and the elimination of motor wirings.

Industries of Success

Applications and industries where the SyMAX®-i thrives

The SyMAX®-i motor has proven itself within the commercial HVAC market as a high-efficiency motor perfect for condenser fan, fan and blower, and commercial refrigeration applications.                   

Commercial HVAC


Saving Money in the Market

How high-efficiency performance delivers maximum savings

The topic of energy efficiency is everywhere in today’s business climate. Companies are looking for ways to reduce their energy consumption without sacrificing quality in the products they implement in their applications. With new energy acts and legislation rolling out, there has never been a better time to lean into energy efficiency.

The SyMAX®-i motor offers a built-in passive power factor correction (85-89%@FL) circuitry that reduces voltage drop in the motor and save money.

Features and Benefits

Let’s get the facts straight


  • Heavy duty rolled steel construction
  • UL and CSA recognition
  • Class F Insulation with 60°C ambient temperature
  • IP54 Enclosure
  • Power Rating: 3.7HP at 133 in/lbs of torque
  • Voltage: 230VAC or 460VAC 50/60HZ
  • IntelliDrive embedded control
  • 85% plus system efficiency levels (Motor & Drive)
  • I/O options: 0-10VDC, 10-0VDC, 4-20mA, up to 9 discrete speeds


  • Greater energy savings and reduced operating costs compared to conventional motor drive combinations
  • High torque output allows the SyMAX®-i to operate in demanding applications
  • Integrated motor/drive with built-in intelligence and protection algorithms, allowing plug and play feature set
  • Wide voltage and frequency ranges meet global requirements
  • Communication options allow for EMS interface

Get Support

Looking for more information? Please reach out to us using this form.

For quote requests, please use this form.

Talk to one of our expert sales professionals to learn more about how this product can improve your business.

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Commercial Systems|Industrial Systems