Description
The Regal Rexnord Marathon B303 is a heavy-duty blower motor engineered for reliable, long-lasting performance in a wide range of HVAC air-handling and blower applications. Built on the trusted Marathon platform, this motor delivers consistent airflow and dependable operation in demanding residential and light commercial environments.
Key Specifications
- Horsepower: 1/4 HP
- Voltage: 115VAC
- Phase: Single Phase
- Speed: 1800 RPM
- Amperage: 5.0 Amps
- Frame Size: 48YZ
- Enclosure: Open Drip Proof (ODP)
- Bearing Type: Ball Bearing
- Mount Style: Resilient Base with Extended Studs
Product Highlights
- Ball bearing construction ensures smooth, quiet operation and extended service life
- Open Drip Proof enclosure protects internal components from dripping liquids in standard installations
- Resilient base with extended studs allows for flexible, vibration-dampening mounting configurations
- 48YZ frame size provides broad cross-reference compatibility with common blower assemblies
- Single-phase, 115VAC design for straightforward integration into standard residential and light commercial electrical systems
- Manufactured by Regal Rexnord under the Marathon brand — a trusted name in HVAC motor solutions
Typical Applications
- Residential and light commercial air handlers
- Furnace blower assemblies
- Fan coil units
- General HVAC blower replacement applications







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