A direct-fit replacement blower motor engineered for reliable two-speed airflow performance. The 1TDT8A drops in where Dayton 5C508, Fasco 7090-1184, and Century 9459 motors have failed, restoring high- and low-speed operation without modification. Ball bearings and automatic overload protection deliver long service life in demanding HVAC and ventilation applications.
The Dayton 1TDT8A is built as a direct replacement for several discontinued and hard-to-source blower motors. Whether you are servicing a rooftop HVAC unit, a furnace air handler, or an industrial ventilation blower, this motor restores both high-speed (797 CFM / 1360 RPM) and low-speed (549 CFM / 970 RPM) operation using the original wiring and mounting footprint.
At 115V and 3.3 amps, it is compatible with standard single-phase residential and light commercial circuits. The 60/50 Hz rating makes it usable in both North American and international installations. Automatic overload protection shuts the motor down before heat damage can occur -- it resets automatically once temperatures return to safe levels.
Switches between 1360 RPM (high) and 970 RPM (low), delivering 797 or 549 CFM to match comfort and noise requirements.
Precision ball bearings reduce friction and wear, extending motor life compared to sleeve-bearing designs in dusty or warm environments.
Built-in thermal overload protector cuts power if the motor overheats and resets automatically, protecting the winding from burnout.
Directly replaces Dayton 5C508, Fasco 7090-1184, Century 9459, JE2J047, and JE2J047NS -- one motor covers multiple legacy applications.
The 1TDT8A is confirmed to replace the following OEM and aftermarket motor part numbers:
This motor is also catalogued under NBK Parts number 20230, which is the vendor part number used by some distributors and service wholesalers.
This motor is commonly used in forced-air heating and cooling systems, rooftop package units, air handlers, and commercial ventilation blowers where two-speed control is required. The 104 deg F maximum inlet air temperature rating makes it suitable for normal HVAC return-air and supply-air streams but not for high-temperature exhaust or combustion-air applications.
The 1TDT8A is a two-speed motor with separate high- and low-speed winding taps. Confirm your existing control wiring (typically a two-speed thermostat or relay) matches before installation. The motor draws 3.3 amps at 115V on the high-speed tap -- verify your circuit breaker and wire gauge are appropriate for continuous duty at this amperage.