Lennox Y8773 is a high-efficiency OEM ECM blower motor from Nidec / US Motors, model 5542ET, part of the RESCUE ECOTECH series. This electronically controlled, brushless permanent magnet motor is engineered as a direct-drive replacement for PSC blower motors used in residential and light commercial HVAC furnaces and air handlers.

The motor delivers constant torque performance with a 3/4 to 1/3 HP output range and operates on 115V single-phase power (also compatible with 208–230V at 50/60 Hz). With a rated speed of 1075 RPM and variable speed operation, it provides consistent airflow, improved efficiency, and quieter operation compared to traditional PSC motors. The ECM design eliminates the need for a capacitor and reduces overall energy consumption.

Designed for durability and long service life, the Y8773 features ball bearings, continuous air-over duty, Class B insulation, and electronic motor protection. It is rated for 40°C ambient conditions and includes reversible rotation for flexible installation. The 48-frame motor uses a belly band mounting configuration and comes with a 1/2 inch x 4.5 inch shaft and 36 inch leads, making it a true drop-in replacement solution.

This motor is ideal for HVAC technicians and contractors seeking a reliable OEM Lennox replacement that improves system efficiency while maintaining proper airflow and compatibility. A 2-year manufacturer warranty is included.