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15HP MARATHON 3600RPM 254T 208-230/460V TEFC 3PH MOTOR U644A

MARATHON U644A has been superseded by MARATHON E2121

Catalog Number:  U644A
Model Number: 254TTFC6002
Description:  15HP,3600RPM,254T,208-230/460V,TEFC,3PH,60/50HZ
Ship Weight:  300 lbs.

APPLICATIONS: For use on compressors, pumps, conveyors, blowers, and other machinery in dirty and dusty environments. Substantial energy savings can be realized when using this high efficiency motor. Guaranteed efficiencies offer an eXtra Return on your Investment when using this premium efficiency motor on high cycle or long run time applications.


  • Cast Iron Frame
  • Rigid base
  • Totally enclosed fan-cooled
  • 1 5/8" shaft output diameter
  • Meets or exceeds NEMA Premium® efficiencies
  • Suitable for use on a VFD, 10:1
  • Will become build-up item when current stock is gone
  • 1.15 Service Factor on sinewave, 1.0 Service Factor on IGBT power
  • F1 conduit box on Rigid Base
  • Shaft slinger
  • Ball bearings
  • UL Recognized, CSA Certified and CE Mark
  • Three year warranty
  • Footnotes: D

This product must be installed and serviced by a qualified technician, electrician, or electrical maintenance person familiar with its operation and the hazards involved. Proper installation, which includes electrical connections, fusing or other current protection, and grounding, can reduce the chance of electrical shocks, and fires, in this product or products used with this product, such as electric motors, switches, coils, solenoids, and relays. Do not use this product in an explosion-proof application.

Phase 3 Insulation Class F
Frame 254T Duty CONTINUOUS
Enclosure TEFC Ambient 40
Mounting Rigid NEMA Design B
Orientation HORIZONTAL Starting Type ACROSS THE LINE
Assembly F1 (F2 Modification Available) KVA Code G
Drive End Bearing BALL IP Code 43
Opposite End Bearing BALL    
Drive End Bearing Size 6309    
Opposite End Bearing Size 6308    
Weight 300 LB lbs    
UL Recognized Construction
Thermal Protection  
15HP MARATHON 3600RPM 254T 208-230/460V TEFC 3PH MOTOR U644A
Click Image to Enlarge
Image for quick reference only
Manufacturer Part Number: U644A
Stock # U644A

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