Rectorseal M12237 Round Run Capacitor 20 Mfd 440V

Product Description

The RECTORSEAL M12237 is a round run capacitor rated at 20 microfarads (MFD) and 440 volts, designed for continuous-duty motor operation in HVAC equipment. Run capacitors maintain a phase shift in the start winding of single-phase motors, improving torque and operating efficiency during normal run cycles. This unit is housed in a compact round case measuring 1.75 inches in diameter and 3.5 inches in height, making it a direct-fit replacement in tight equipment compartments. HVAC technicians install this capacitor as part of routine service on condensing units, air handlers, and fan motor circuits.

This capacitor is suited for residential and light commercial HVAC applications where a single-rated 20 MFD, 440-volt round run capacitor is required. Typical installations include outdoor condensing unit fan motors and compressor run circuits that call for a 440-volt-rated component. The 440-volt rating provides adequate margin for standard 240-volt motor circuits, which is consistent with industry practice for run capacitor selection.

Key Features

• 20 MFD capacitance rating for single-phase motor run duty
• 440-volt AC rating provides safety margin on 240-volt circuits
• Round case form factor fits standard capacitor brackets and mounting clips
• Compact dimensions: 1.75 inches diameter by 3.5 inches height
• Direct replacement form factor for common round run capacitors

Compatibility

Designed as an OEM-style replacement for single-phase HVAC motors requiring a 20 MFD, 440-volt round run capacitor in residential and light commercial systems.

Installation Notes

Run capacitors must be installed by a qualified HVAC technician. Disconnect and lock out all power to the unit before removing the existing capacitor, and discharge the old capacitor fully before handling — capacitors retain a charge after power is removed. Verify that the MFD rating, voltage rating, and physical form factor match the original component before installation. Follow all applicable local electrical codes and the equipment manufacturer's wiring diagram during replacement.

Technical Specifications

• Capacitance: 20 MFD
• Voltage Rating: 440 volts AC
• Case Style: Round
• Diameter: 1.75 inches
• Height: 3.5 inches
• Depth: 1.75 inches
• UPC: 685744122371

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12237