Rectorseal M11987 Run Capacitor 340-408 Mfd 250V

Product Description

The RECTORSEAL M11987 is a run capacitor rated at 340 to 408 microfarads (MFD) and designed for operation at 250 volts or 220 volts. Run capacitors maintain a continuous phase shift in motor windings to keep single-phase motors running smoothly and efficiently. This capacitor is typically found in HVAC compressor and fan motor circuits where stable motor operation is critical. Licensed HVAC technicians install and replace this component during routine maintenance or when diagnosing motor start and run failures. Its compact cylindrical form factor fits standard capacitor brackets in most residential and light commercial air conditioning and heat pump equipment.

This run capacitor is suited for single-phase motor applications in residential and light commercial HVAC systems, including air conditioner condensing units and heat pump outdoor units. It supports motor circuits requiring a continuous capacitance in the 340 to 408 MFD range at 250V or 220V. Installations are typically found in compressor motor circuits where a correctly rated run capacitor is essential for proper motor torque, efficiency, and longevity. Always verify the MFD rating and voltage rating of the original capacitor before selecting a replacement.

Key Features

• Rated 340 to 408 MFD for continuous run-duty motor applications
• Dual voltage rating of 250V and 220V for flexible system compatibility
• Compact footprint measuring 1.812 inches wide by 3.375 inches tall for easy bracket fitment
• Designed as a direct replacement run capacitor for single-phase motor circuits
• UPC 685744119876 for straightforward parts identification and ordering

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase HVAC compressor and fan motor applications requiring a 340 to 408 MFD rating at 250V or 220V.

Installation Notes

Run capacitor replacement is performed by a licensed HVAC technician. Always disconnect and lock out power to the unit before servicing capacitors, as capacitors retain a lethal charge even after power is removed — discharge the capacitor safely using an approved resistor discharge tool before handling. Verify that the replacement MFD value and voltage rating match or meet the equipment manufacturer's specifications. Installation should comply with applicable NEC requirements and local electrical codes.

Technical Specifications

• Capacitance Range: 340 to 408 MFD
• Voltage Rating: 250V / 220V
• Width: 1.812 inches
• Length: 1.812 inches
• Depth: 1.812 inches
• Height: 3.375 inches
• UPC: 685744119876

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M11987