Rectorseal M12299 Dual Run Capacitor 55/10 Mfd 440V

Product Description

The RECTORSEAL M12299 is a dual run capacitor rated at 55/10 microfarads (MFD) and 440 volts, designed for use in residential and light commercial HVAC systems. Run capacitors store and release electrical energy to maintain steady motor operation in compressors and fan motors. This round-style capacitor delivers a 55 MFD rating for the compressor winding and a 10 MFD rating for the condenser fan motor, both on a single 440V unit. HVAC technicians install this component during routine capacitor replacement or as part of a compressor or fan motor service call. Its compact round form factor fits standard capacitor mounting brackets in most air conditioning and heat pump condensing units.

This capacitor is suited for split-system air conditioners and heat pumps where a single dual-rated capacitor serves both the compressor and outdoor fan motor. It is a common replacement part during the cooling season when capacitor failure causes hard-start conditions, motor humming, or system shutdown. The round form factor and standard MFD ratings make it a practical direct-replacement option for techs stocking a service van with commonly needed capacitor values.

Key Features

• Dual run capacitor supports both compressor and condenser fan motor circuits in one unit
• 55/10 MFD rating covers the most common compressor and fan motor pairing in residential condensing units
• 440V rating provides voltage headroom for both 208/230V single-phase applications
• Round form factor fits standard capacitor brackets and retention straps
• Compact dimensions allow installation in tight equipment cabinets

Compatibility

Designed as an OEM-style replacement dual run capacitor for residential and light commercial split-system air conditioners and heat pumps requiring a 55/10 MFD, 440V round capacitor.

Installation Notes

Dual run capacitors are installed by licensed HVAC technicians. Always disconnect and lock out power to the condensing unit before handling capacitors, and discharge the capacitor terminals using an approved resistor or discharge tool before removing any wiring. Capacitors can retain a lethal charge even after power is removed. Follow local electrical codes and manufacturer wiring diagrams when reconnecting terminals to the compressor, fan motor, and contactor.

Technical Specifications

• Capacitance: 55/10 MFD
• Voltage Rating: 440 volts
• Style: Round
• Width: 2.5 inches
• Length: 2.5 inches
• Height: 4.375 inches
• Depth: 2.5 inches

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12299