Rectorseal M12124 Dual Run Capacitor 50/10 Mfd 440V

Product Description

The RECTORSEAL M12124 is a dual run capacitor rated at 50/10 microfarads (MFD) and 440 volts, designed for use in single-phase HVAC compressor and fan motor circuits. Run capacitors maintain the phase shift needed to keep motors running efficiently after startup. This round-style capacitor measures 2.5 inches in diameter and 4.375 inches in height, making it a compact fit for most residential condenser unit capacitor brackets. Installation is typically performed by a licensed HVAC technician as part of a compressor or condenser fan motor service call.

This capacitor is used in residential and light commercial air conditioning and heat pump systems where a single capacitor serves both the compressor and the condenser fan motor simultaneously. The dual-rating configuration — 50 MFD for the compressor and 10 MFD for the fan — eliminates the need for two separate capacitors in the same cabinet. It is a common replacement component during seasonal HVAC maintenance, motor replacements, and system no-cool diagnostics.

Key Features

• Dual-rated at 50/10 MFD for simultaneous compressor and fan motor support
• 440-volt rating provides compatibility across standard 208/230-volt residential systems
• Round form factor fits standard capacitor mounting brackets in condensing units
• Compact dimensions: 2.5 inches diameter by 4.375 inches height

Compatibility

Designed as an OEM-style replacement dual run capacitor for residential and light commercial single-phase air conditioning and heat pump condensing units requiring a 50/10 MFD 440-volt round capacitor.

Installation Notes

Installation should be performed by a licensed HVAC technician. Always disconnect and lock out power to the condensing unit before handling capacitors — capacitors store a charge and must be safely discharged before removal. Verify the MFD ratings and voltage rating of the original capacitor before installing a replacement. Follow all applicable local electrical codes and NEC guidelines when servicing capacitor circuits.

Technical Specifications

• Capacitance Rating: 50/10 MFD
• Voltage Rating: 440 volts
• Form Factor: Round
• Diameter: 2.5 inches
• Height: 4.375 inches
• Depth: 2.5 inches

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12124