SyMAX® Motor

SYMAX® offers one of the highest available dynamic response of any motor on the market due to the reduced rotor inertia. With permanent magnet (PM) design SyMAX® rotor loss is minimized reducing operation temperature. Resulting in a consistent repeatable machine performance which creates less product variation resulting in a higher quality product for the consumer. You'll see longer maintenance intervals as well and increased service life of the entire drive system since power transmission devices such as pulleys, belts, and gear reducers have been simplified or removed.


  • Broad product offering that is designed for high speed & high performance air moving, compressor, and pumping applications
  • Wide voltage/frequency range meeting global requirements
  • Meets IE4 plus efficiency levels  
  • “Performance Matched” to all leading brands of PWM permanent magnet drives guaranteeing years of trouble-free operation
  • Direct drop-in replacement, with 1-2 frame size reduction possible


  • Power Rating: up to 75 HP
  • TENV - Operational to 20:1 constant torque open-loop (1000:1 closed-loop)
  • TEFC - Operational to 20:1 constant torque open-loop or closed-loop
  • Totally enclosed non-ventilated (TENV), as noted
  • High power density, low weight design
  • Ball bearing
  • Requires drive for operation
  • IP ratings: (Rolled steel) IP 43/54, (Cast Iron) IP 54,55,56
  • Class "H" for Cast Iron
  • Class "F" for Rolled steel
  • Ultra Efficient Premium-Plus exceeds NEMA Premium (IE4)
  • Cast iron construction for rigidity and reduced vibration, as shown
  • Premium severe duty in cast iron models
  • BCP or insulated ceramic rolling element bearings – optional
  • Provisions for Encoders
  • UL®, CSA® and CE®

MAX GUARD® Insulation System allows operation at any practical cable distance, at any carrier frequency, on any approved drive. MAX GUARD® Insulation System combines the best materials, design and quality standards to deliver long, dependable motor life under the dielectric stress imposed by today’s variable frequency drives, a “Low stress” winding configuration protected from dielectric stress from fast switching IGBTs, full Class H insulating materials, exceeding the requirements of NEMA MG1 Part 31 for inverter-driven motors.

PMAC: Permanent Magnet AC, sinusoidally distributed stator winding to produce sinusoidal back-electromotive force (EMF) waveforms

Cross Reference Tool

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Associated Models

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

The Marathon® brand has a developed reputation for conservative motor designs and highly engineered products used in a vast array of commercial and industrial applications around the world.

Today, we build on our legacy of innovative and efficient motor designs by the joining of magnetics and motors into a single leading technology. This allows for unparalleled power densities, unprecedented performance, and unmatched efficiencies.

Our SyMAX® PMAC radial flux motors allow you to imagine and implement possibilities that no conventional induction motor or competing variable speed technology could provide in air moving, compressor, and pumping applications.

The SyMAX® FHP motor is built in a 48 frame TENV enclosure and delivers the equivalent horsepower and torque of a 145T frame induction motor.  This is a three frame reduction in size!

The SyMAX® IHP motor has a power range from 1/2 HP to 50HP and typically has twice the torque of an equivalent induction motor in the same frame size.  Imagine a world with no belts, sheaves, or gearing, the cost savings along with the on-going savings in maintenance cost, and downtime due to worn out mechanical products.



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Commercial Systems|Industrial Systems