Dayton 3N349 3-Phase Motor 1/4 HP 48 Frame 208-230/460V AC

Three-Phase Motor for Industrial HVAC Systems

The Dayton 3N349 is a 1/4 HP three-phase general-purpose motor built for HVAC controls and compatible industrial equipment. It operates on 208-230/460V AC at 60 Hz and fits a NEMA 48 frame. The rigid base mounting and CW/CCW shaft rotation suit fixed installations that need reversible direction. Continuous-duty rating and Class B insulation support long-running HVAC fans, pumps or drives in commercial and light-industrial settings.

Integration Into Air-Handling Builds

The steel frame and ball bearings handle the vibration and radial loads common in ducted or plenum-mounted assemblies. A 40 °C maximum ambient temperature matches typical mechanical-room conditions. Because the enclosure is totally enclosed non-ventilated, the motor does not draw cooling air from the airstream, simplifying sealing against dust or moisture. Full-load current of 1.1 A at 208-230 V or 0.5 A at 460 V lets the installer size branch-circuit protection and starters without extra calculation.

Steady-State Operation Characteristics

Nominal efficiency of 69.7 percent and a service factor of 1.0 indicate the motor is intended for constant-load runs rather than frequent overload cycles. Nameplate speed of 1,725 RPM delivers predictable airflow or fluid flow when paired with matched pulleys or direct-drive shafts. Thermal protection is not included, so external overload relays or a motor starter with built-in protection must be provided by the installer. The motor meets continuous-duty requirements for extended HVAC cycles.