Description
The Regal Rexnord Marathon K381 is a heavy-duty commercial blower motor engineered for reliable, long-service performance in demanding HVAC and industrial blower applications. Built on the trusted Marathon platform, this motor delivers consistent airflow performance across a wide range of commercial and light-industrial systems.
Motor Specifications
- Horsepower: 1/2 HP
- Voltage: 208-230/460 VAC
- Phase: Three Phase
- Speed: 1725/1425 RPM (60/50 Hz)
- Full Load Amps: 2.3-2.2/1.1 A
- Frame Size: 56
- Enclosure: Open Drip Proof (ODP)
- Bearing Type: Ball Bearing
- Mounting: Resilient Base
- SKU: K381
Key Features & Benefits
- Three-phase design delivers smooth, efficient power ideal for commercial blower and air-handling equipment
- Dual-voltage capability (208-230/460V) provides installation flexibility across a wide range of electrical systems
- Dual-speed rating (1725/1425 RPM) supports both 60 Hz and 50 Hz applications
- Open Drip Proof (ODP) enclosure protects internal windings from dripping liquids and falling debris in standard indoor environments
- Precision ball bearings ensure low friction, reduced maintenance intervals, and extended motor life
- NEMA 56 frame provides a standardized footprint for straightforward drop-in replacement or new installations
- Resilient base mounting reduces vibration transmission to the surrounding structure, minimizing noise and mechanical stress
Typical Applications
- Commercial HVAC blower assemblies
- Air handling units (AHUs)
- Fan coil units
- Industrial ventilation blowers
- Replacement motor for OEM 56-frame blower motor installations
Why Choose the Marathon K381?
Marathon Electric, a Regal Rexnord brand, is a recognized leader in commercial and industrial electric motor manufacturing. The K381 is built to NEMA standards, ensuring compatibility and interchangeability with a broad range of equipment. Its dual-voltage, dual-speed configuration makes it a versatile stocking motor for HVAC contractors and distributors serving mixed commercial fleets.
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