Rectorseal M12221 Round Run Capacitor 40 Mfd 370V

Product Description

The RECTORSEAL M12221 is a round run capacitor rated at 40 microfarads (MFD) and 370 volts, designed to support continuous motor operation in HVAC equipment. Run capacitors store and release electrical energy to keep single-phase motors running smoothly after startup, maintaining the phase shift needed for efficient rotation. This unit is housed in a compact round aluminum can measuring 1.75 inches in diameter and 4.25 inches tall. It is installed by licensed HVAC technicians as a direct replacement in air conditioning condensers, heat pumps, and air handlers where motor reliability is critical.

This capacitor is suited for residential and light commercial HVAC applications where a 40 MFD, 370-volt round capacitor is specified. Common install locations include condenser fan motors and compressor circuits in split-system air conditioners and heat pumps. Its round form factor fits standard capacitor mounting brackets found in most outdoor condenser units.

Key Features

• 40 MFD capacitance rating for continuous-duty motor run applications
• 370-volt AC rating suitable for standard residential HVAC motor circuits
• Round housing fits widely used condenser and air handler capacitor mounts
• Compact profile at 1.75 inches wide by 4.25 inches tall for tight cabinet installations

Compatibility

Designed as an OEM-style replacement for single-phase HVAC motors requiring a 40 MFD, 370-volt round run capacitor in residential and light commercial systems.

Installation Notes

Run capacitors are installed by qualified HVAC technicians. Always disconnect and lock out power to the unit before servicing capacitors, as they can hold a dangerous charge even after equipment is shut off. Discharge the capacitor using an approved discharge tool before handling. Follow all applicable local codes and manufacturer wiring diagrams during installation.

Technical Specifications

• Capacitance: 40 MFD
• Voltage Rating: 370 volts
• Shape: Round
• Width: 1.75 inches
• Length: 1.75 inches
• Height: 4.25 inches
• Depth: 1.75 inches
• UPC: 685744122210

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12221