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Dayton 3N350 three-phase motor, steel frame, rigid base

Dayton

Dayton 3N350 1/3 HP 48 Frame 208-230/460V Three-Phase Motor

SKU CH-DQWH-MPPGS

A 1/3 HP three-phase motor in a 48 frame with 208-230/460V operation and 725 RPM for continuous-duty HVAC applications

  • Three-phase power delivers balanced torque for industrial loads
  • 1/3 HP output at 1,725 RPM handles continuous-duty applications
  • Dual-voltage 208-230/460 V design fits multiple supply systems
  • 48-frame steel construction with ball bearings ensures rigid mounting
  • Totally enclosed non-ventilated enclosure protects windings in harsh environments

Motor for HVAC systems

This three-phase motor delivers 1/3 HP at 1,725 RPM for continuous-duty HVAC applications. It operates on 208-230/460V AC at 60 Hz with a 48 frame size and rigid base mounting. The steel frame and ball bearings support CW/CCW shaft rotation for flexible installation. Nominal efficiency is rated at 72 percent under full-load conditions.

Thermal and electrical profile

The totally enclosed non-ventilated enclosure runs without external airflow up to a maximum ambient temperature of 40 degrees Celsius. Insulation Class B and a 1.0 service factor handle sustained operation within nameplate limits. Full-load current draws 1.3 amps at 208-230 volts or 0.70 amps at 460 volts with no dedicated thermal protection device fitted.

Build quality and mounting implications

A steel frame and ball bearings provide mechanical durability for industrial environments. The rigid base requires secure bolting to a flat surface to maintain alignment and reduce vibration. Dual-voltage windings allow wiring for either low or high voltage supply without rewinding. Absence of thermal protection means the installer must provide external overload safeguards per local code.

Highlights

  • Three-phase power delivers balanced torque for industrial loads
  • 1/3 HP output at 1,725 RPM handles continuous-duty applications
  • Dual-voltage 208-230/460 V design fits multiple supply systems
  • 48-frame steel construction with ball bearings ensures rigid mounting
  • Totally enclosed non-ventilated enclosure protects windings in harsh environments

Specifications

BrandDAYTON

Questions about this item

How is the 48-frame motor mounted, and what step is often missed?

Bolt the rigid steel base to a flat surface and align the shaft before tightening; skipping alignment causes vibration and premature bearing wear.

Which part will need replacement first during continuous duty?

The ball bearings are the primary wear item; with no thermal protection they can overheat if the 40 °C ambient limit is exceeded.

At what load does the 72 % efficiency limit appear during sustained operation?

Efficiency is rated at full-load amps of 1.3 A at 230 V or 0.70 A at 460 V; running continuously above that load drops efficiency below 72 %.

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