Marathon 4338 Electric Motor 3/4 HP 1800 Rpm 1PH 115 Volt 56 Frame 5KH39QN9541T

The Leeson (formerly Marathon) 4338 fan and blower motor by Regal Rexnord is a reliable 3/4 HP single‑phase motor designed for HVAC fan and blower applications. Operating at 1725 RPM on 115V power, this motor features a NEMA 56 frame with a drip proof (DP/ODP) enclosure and resilient base mounting that helps reduce vibration in belt‑driven and direct‑drive systems. Built for continuous duty with a split‑phase design, automatic thermal protection, and durable ball bearings, the 4338 is well suited for commercial air handlers, exhaust fans, and general fan and blower equipment.

• Horsepower: 0.75 HP (3/4 HP, 0.56 kW)
• Phase: Single Phase
• Voltage: 115V
• Frequency: 60 Hz
• Speed: 1725 RPM
• Frame: NEMA 56
• Mounting: Resilient Base
• Enclosure: Drip Proof (DP / ODP)
• Duty Rating: Continuous Duty
• Insulation Class: B
• Thermal Protection: Automatic
• Electrical Design: Split Phase
• Poles: 4
• Current: 11.4 A
• Efficiency: 64.5 percent (Full Load)
• Rotation: Reversible (CW/CCW)
• Bearings: Ball Bearings
• Shaft Diameter: 5/8 in
• Shaft Extension: 1.88 in
• Ambient Temperature Rating: 40°C
• Frame Material: Rolled Steel
• Certifications: UL Recognized, CSA Certified