Rectorseal M12174 Dual Run Capacitor 45/5 Mfd 370V Oval

Product Description

The RECTORSEAL M12174 is a dual run capacitor rated at 45/5 microfarads (MFD) and 370 volts, designed to support motor starting and running in single-phase HVAC systems. Dual run capacitors serve two loads simultaneously, typically the compressor and the condenser fan motor, in a single oval-shaped housing. This reduces cabinet space requirements compared to two separate capacitors. The oval form factor measures 1.806 inches wide by 2.806 inches long by 4.25 inches tall, making it a compact fit for most condenser unit capacitor brackets. Licensed HVAC technicians install and replace this component during routine maintenance or when a failed capacitor is identified as the cause of compressor or fan motor startup failure.

This capacitor is used in residential and light commercial air conditioning and heat pump systems where the condenser unit relies on a single dual run capacitor to energize both the compressor and the condenser fan motor. It is a common replacement component serviced during cooling season maintenance, after hard-start diagnostics, or when capacitance testing reveals a reading outside acceptable tolerance. The oval housing fits standard capacitor brackets found in a wide range of split-system condensers.

Key Features

• Dual run design supports two motor loads from one capacitor housing
• 45/5 MFD rating covers both compressor and condenser fan motor circuits
• 370-volt rating suitable for standard single-phase residential condenser units
• Oval housing fits common condenser unit capacitor mounting brackets
• Compact dimensions minimize space requirements inside the condenser cabinet

Compatibility

Designed as an OEM-style replacement dual run capacitor for single-phase residential and light commercial air conditioning and heat pump condenser units requiring a 45/5 MFD 370-volt oval capacitor.

Installation Notes

Capacitor replacement is performed by licensed HVAC technicians. Disconnect and lock out all power to the condenser unit before opening the electrical access panel. Capacitors store a charge even after power is removed and must be safely discharged using an insulated discharge tool before handling. Follow NEC guidelines and local electrical codes when replacing capacitors in HVAC equipment.

Technical Specifications

• Capacitance: 45/5 MFD
• Voltage Rating: 370 volts
• Shape: Oval
• Width: 1.806 inches
• Length: 2.806 inches
• Height: 4.25 inches
• UPC: 685744121749

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M12174