Marathon C331 Motor 1/2 HP 3450 Rpm 1PH 115/230 Volt 56J 5KC36JN269X

General Purpose Pump Motor – 0.50 HP (C331)

This General Purpose Pump Motor is a high-performance, single-phase motor designed for reliable industrial and residential pumping applications. Featuring a rugged 56J frame and a high-speed 3600 RPM rating, it is engineered for efficiency and longevity.

With its 416 stainless steel threaded shaft, this motor is particularly well-suited for environments where corrosion resistance is essential. The automatic reset thermal protector ensures the motor stays safe during unexpected temperature spikes, making it a “set-and-forget” solution for your pumping needs.

Key Features

• Corrosion Resistant Shaft: The 56J frame includes a 416 stainless steel threaded shaft with a slinger, ideal for water-based pumping applications.

• Built for Durability: Features double-sealed ball bearings that are mechanically locked on the shaft end to prevent movement and ensure smooth rotation.

• Safety First: Equipped with an Automatic Reset Thermal Protector that shuts the motor down if it overheats and restarts it once it has cooled to a safe temperature.

• Dual Voltage: Highly versatile power options, capable of running on either 115V or 230V AC power.

• High Service Factor: A 1.6 Service Factor means this motor can handle intermittent loads up to 60% beyond its rated horsepower without damage.

Technical Specifications

Application & Maintenance

• Orientation: As a Drip Proof (DP) motor, it is designed for use in clean, dry, indoor environments. If used outdoors, a drip cover (sold separately) is highly recommended to protect the internals from falling moisture.

• Rotation: Note that this model features Fixed CW Rotation when viewed from the opposite of the shaft end. Ensure this matches your pump’s impeller requirements.

• Bearings: The double-sealed 6203 bearings are lubricated for life and do not require periodic greasing.

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