The Dayton 1TDP2 is a direct replacement blower motor engineered to restore full airflow performance to heating, ventilation, and air-handling equipment. Rated at 104 CFM and 2815 RPM on 115V/60Hz power, it draws just 1.25 amps and features ball bearings for long service life, Class B insulation for thermal durability, and built-in automatic overload protection for worry-free operation. It directly replaces Dayton model 4C763 and is also catalogued as NBK Parts 20495.
When a blower motor fails in a forced-air heating or ventilation unit, the fix needs to be straightforward. The 1TDP2 matches the physical footprint and electrical specs of the original Dayton 4C763 motor, letting you swap it in without cutting, drilling, or rewiring. The 8 mm shaft, 4-1/16 in x 3-9/16 in flange, and clockwise rotation are all pre-matched to the original application.
Ball bearings -- rather than sleeve bearings -- deliver quieter operation and a longer service interval, especially in continuous-duty or high-cycle applications like RV furnace air handlers, small HVAC units, and commercial ventilation equipment. Automatic overload protection adds a layer of safety by shutting the motor down if it runs too hot, then allowing a manual or automatic reset once temperatures normalize.
Dual ball bearings reduce friction and wear compared to sleeve bearings, extending motor service life in continuous-duty applications.
Built-in thermal overload protection shuts the motor down if it overheats, protecting both the motor and the equipment it serves.
Class B rated winding insulation handles elevated operating temperatures, making it suitable for enclosed or warm-environment installations.
Clockwise shaft rotation (viewed from the shaft end) matches the original 4C763 orientation -- no blade reversal or adapter needed.
At 104 CFM, the 1TDP2 moves enough air to maintain comfort and equipment efficiency in small forced-air systems. The 3-1/8 in inlet diameter and 2-5/8 in x 2-1/8 in outlet opening are sized for compact blower housings commonly found in RV and light commercial applications. If your original system used a Dayton 4C763, airflow performance will be identical with this replacement.
The motor runs on standard 115V/60Hz household or RV shore power, drawing 1.25 amps at full load. That low amperage draw means it won't stress a circuit shared with other appliances, and it's compatible with standard 15-amp branch circuits without a dedicated run. Always verify your supply voltage is stable 115V AC before installation.
The 1TDP2 is rated for a maximum inlet air temperature of 104 deg F (40 deg C). Installations where inlet air consistently exceeds this threshold -- such as certain industrial or high-ambient environments -- should use a motor rated for higher inlet temperatures. For typical RV, residential, and light commercial HVAC applications, the 104 deg F limit is entirely adequate.