Rectorseal M12040 Run Capacitor 25 Mfd 440V Oval

Product Description

The RECTORSEAL M12040 is a 25 microfarad (MFD), 440-volt oval run capacitor designed for single-phase motors in HVAC equipment. Run capacitors maintain a continuous phase shift on the run winding to keep the motor operating smoothly and efficiently after startup. This capacitor is rated at 440 volts, making it compatible with both 240-volt and 277-volt motor circuits within its voltage class. It measures 1.806 inches wide by 2.806 inches long by 3.5 inches tall in the standard oval form factor. Licensed HVAC technicians install this component during compressor, condenser fan motor, or blower motor servicing.

This oval run capacitor is suited for residential and light commercial HVAC applications, including split-system air conditioners, heat pumps, and packaged units. The oval housing fits into a wide range of capacitor brackets and mounting clips used in standard condenser and air handler cabinets. It is a common replacement item during seasonal tune-ups, motor replacements, and compressor changeouts where the existing capacitor shows signs of bulging, low capacitance, or failure under load.

Key Features

• 25 MFD capacitance rating for single-phase motor run circuits
• 440-volt rating suitable for 240-volt and 277-volt motor applications
• Oval form factor fits standard HVAC capacitor mounting brackets
• Compact dimensions: 1.806 x 2.806 x 3.5 inches
• Direct replacement style for failed or degraded run capacitors

Compatibility

Designed as an OEM-style replacement run capacitor for residential and light commercial HVAC motors requiring a 25 MFD, 440-volt oval capacitor.

Installation Notes

Run capacitor replacement is performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before servicing the capacitor, and discharge the existing capacitor fully before handling — stored voltage can remain after power is cut. Confirm the replacement MFD and voltage rating match the motor nameplate requirements before installation. Follow NEC guidelines and local electrical codes for all wiring and equipment service procedures.

Technical Specifications

• Capacitance: 25 MFD
• Voltage Rating: 440 volts
• Shape: Oval
• Width: 1.806 inches
• Length: 2.806 inches
• Height: 3.5 inches
• UPC: 685744120407

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12040