Marathon Electric Explosion Proof AC Motors – Product Spotlight

Marathon Electric’s Hazardous Duty Explosion Proof Motors are AC motors with an all cast iron construction and 1.15 service factor for use on fans, blowers, pumps and compressors that require an explosion proof rating. Hazardous Duty Class I Groups C and D motors are available, as well as Class I Groups F and G motors.



Marathon Electric’s Explosion Proof AC Motors, available at! Pictured is the G639 model, rated for 1/4 horsepower at 1,800 RPM.


These 56/140 frame motors are available in single- and three-phase from 1/4 through 2 horsepower. Motors run at 1,200, 1,800 and 3,600 RPM.

Severe duty features include epoxy paint for extreme environments where contaminants may cause premature motor failure. Corrosion resistant hardware and a stainless steel nameplate resist rust in the most severe environments. The oversized, rotatable explosion proof conduit box provides additional room for field wiring and termination.

The corrosion resistant polypropylene fan and fan cover are non-sparking.

The insulation system utilizes corona resistant magnet wire for improved resistance to voltage spikes. Low loss electrical grade lamination provides for a lower temperature rise, significantly increasing the life of the motor. These motors meet UL frame temperature limit code T3B.

These motors also feature an explosion proof, automatic reset thermal protector.

Mounting configurations include C-Face, rigid base, resilient and through-bolt designs.

For more information about Marathon Electric’s Explosion Proof Motors, contact our experts today!


Share This:

Posted in:

Leave a Reply

Your email address will not be published. Required fields are marked *