Us Motors 1933 Psc Ac Motor 1/4 Hp 115V 1075 Rpm 48YZ

Product Description

The US MOTORS 1933 is a single-phase permanent split capacitor (PSC) AC motor built for HVAC applications requiring reliable, low-maintenance air-moving performance. Rated at 1/4 horsepower and 115 volts, it operates at 1075 RPM nameplate speed with a 48YZ frame and yoke mount configuration. The open air-over (OAO) enclosure allows airflow across the motor for cooling, making it well suited to indoor blower and fan assemblies. Ball bearings support the shaft, and automatic thermal protection guards against overheating. A 1/2-inch diameter shaft extends 3-3/4 inches for direct coupling to fan wheels or blower assemblies. Licensed HVAC technicians and motor replacement specialists are the primary installers.

This motor is applied in residential and light commercial HVAC systems where a yoke-mount, OAO-enclosure PSC motor is required. Typical install scenarios include indoor air handler blower decks, evaporator coil fan assemblies, and similar forced-air equipment that uses a 48YZ-frame motor. It runs at two speeds, supports counterclockwise rotation from the lead end, and is rated for ambient operating temperatures down to 40 degrees F. The Dayton cross-reference part number is 4UX60, which aids in identifying compatible equipment and verifying drop-in fitment.

Key Features

• 1/4 HP single-phase PSC motor rated at 115 volts, 60 Hz
• 1075 nameplate RPM with two-speed operation
• 48YZ frame with yoke mount for direct replacement in HVAC blower decks
• OAO enclosure designed for air-over cooling in fan and blower applications
• Ball bearing construction for extended service life
• Automatic thermal protection with Class B insulation
• Counterclockwise rotation from the lead end; 1/2-inch x 3-3/4-inch shaft

Compatibility

Designed as an OAO yoke-mount PSC replacement motor for 48YZ-frame HVAC blower and fan applications. Cross-references to Dayton part number 4UX60.

Installation Notes

Motor replacement should be performed by a licensed HVAC technician. Disconnect and lock out all electrical power to the unit before removing the existing motor. Verify shaft diameter, rotation direction, and mounting configuration match the original motor before installation. Consult the equipment manufacturer's wiring diagram and observe applicable NEC requirements for motor branch-circuit sizing and protection.