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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.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $167.99
Pricier than about 79% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameDAYTON

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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