Rectorseal m12789 Dual Run Capacitor 45/7.5 Mfd 440V

Product Description

The RECTORSEAL m12789 is a dual run capacitor rated at 45/7.5 microfarads (MFD) and 440 volts, designed to support the continuous operation of HVAC compressor and fan motor circuits. Dual run capacitors serve two motor loads simultaneously — typically the compressor and the condenser fan — from a single oval or round housing. This reduces component count in the electrical compartment and simplifies replacement. The m12789 is a new-condition unit suitable for residential and light commercial air conditioning and heat pump systems. Installation is performed by a licensed HVAC technician as part of routine equipment service or emergency repair.

This capacitor is used in split-system air conditioners and heat pumps where the control board or contactor supplies a shared run capacitor for both the compressor and condenser fan motor. Dual run capacitors are one of the most commonly replaced components in HVAC service, typically failing due to heat exposure, age, or voltage stress. The m12789 fits applications requiring a 45 MFD compressor section and a 7.5 MFD fan section at a 440-volt rating, which is compatible with standard 370-volt and 440-volt rated motor circuits.

Key Features

• Dual run capacitor supports compressor and condenser fan motor from a single unit
• Rated 45/7.5 MFD with a 440-volt rating for broad motor circuit compatibility
• New-condition component — not remanufactured or reconditioned
• 440-volt rating provides headroom for use in both 370V and 440V rated applications

Compatibility

Designed as an OEM-style replacement dual run capacitor for residential and light commercial split-system air conditioners and heat pumps requiring a 45/7.5 MFD, 440-volt dual run capacitor.

Installation Notes

Dual run capacitors must be replaced by a licensed HVAC technician. Disconnect and lock out all power to the unit before opening the electrical compartment. Capacitors store a lethal electrical charge and must be safely discharged prior to handling — use an insulated discharge resistor or discharge tool, never short the terminals directly. Verify the replacement MFD ratings and voltage rating match the equipment nameplate before installation.