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Marathon 143THTN9026 HP: 1 Volts: 460 RPM: 1800
VIN#: 1187501802
Qty on hand Qty on hand: Stock
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Catalog Number:W501
Enclosure:Totally Enclosed
Model No.:143THTN9026
Mounting:Rigid Base

Premium Severe Duty/Chemical Processing/IEEE-841,
Three Phase, NEMA Premium® Efficiency, Blue Chip XRI®
Totally Enclosed, Rigid Base


For extreme applications in the process industries such as chemical plants, pulp and
paper mills, refineries, above-ground mines, food processing, foundries, and other
severe duty environments where long life and ultra-high efficiency are required.
Guaranteed efficiencies offer an eXtra Return on your Investment when using these
premium efficiency motors on high cycle or long run time applications.


  • Meets or exceeds NEMA Premium® efficiencies
  • Meets IEEE-841 standard for severe duty applications
  • Blue Chip® quality, 100% cast iron construction for rigidity and reduced vibration
  • Inpro/Seal® VBX® bearing isolators on drive end shaft extension TENV and on
    both ends of TEFC
  • Provisions to add stub shaft for an encoder (182T-449T, TEFC only)
  • Internal and external epoxy paint
  • MAX GUARD® Class F insulation system
  • 1.15 Service Factor on sinewave, 1.0 Service Factor on IGBT power
  • Bearing caps (254T and larger)
  • Precision balanced
  • Extended grease tubes, regreasable in service
  • Brass drain and breather
  • Meets IEEE45 USCG Marine Duty, API RPI4F for offshore platforms, IP56
  • Meets NEMA MG1 - 1.26.6 Waterproof specification
  • Division 2 CSA certification nameplate, for hazardous locations, Class I Groups A, B,
    C, and D
  • Actual test and vibration data supplied with each motor
  • Ball bearings, except where noted
  • UL Recognized (through 44

Available with Nameplate Modification (through 40 HP):

  • 2:1, 20:1, or 1000:1 Constant Torque, 1.0 Service Factor on IGBT (PWM) power
  • 1.25 Service Factor through 40 HP (sinewave only)
  • 50HZ at same HP, 1.0 Service Factor through 40 HP (sinewave only)
  • Contact Marathon Electric for optional nameplate markings on 50 HP and larger: