Rectorseal M11021 Motor Start Capacitor 324-388 Mfd 110/125V

Product Description

The RECTORSEAL M11021 is a round motor start capacitor rated at 324-388 microfarads (MFD) and 110/125 volts, designed to provide the initial torque burst needed to start single-phase compressor and fan motors. Built with a phenolic composition housing, it operates across a temperature range of -40 degrees F to 149 degrees F (-40 to 65 degrees C) and supports both 50 Hz and 60 Hz systems. This capacitor handles up to 30 starts per hour, making it suited for applications where frequent cycling is expected. Licensed HVAC technicians and refrigeration mechanics are the primary installers for this component.

The M11021 is intended for residential and commercial air conditioning and refrigeration equipment. It is typically installed in the start circuit of single-phase compressor motors or condenser fan motors where additional starting torque is required. Its dual-voltage rating of 110/125 volts provides flexibility across a range of motor configurations commonly found in packaged cooling units, split systems, and light commercial refrigeration systems.

Key Features

• 324-388 MFD rating covers a broad capacitance range for versatile motor start applications
• Dual voltage rating of 110/125 volts suits a wide range of single-phase motor configurations
• Phenolic housing construction provides durable insulation and heat resistance
• Rated for up to 30 starts per hour, supporting moderate-cycle applications
• Compatible with 50 Hz and 60 Hz systems for domestic and international equipment
• Wide operating temperature range of -40 to 65 degrees C for reliable performance in harsh environments

Compatibility

Recommended for use in residential and commercial air conditioning and refrigeration systems requiring a motor start capacitor rated at 324-388 MFD and 110/125 volts.

Installation Notes

Installation should be performed by a licensed HVAC technician or refrigeration mechanic. Always disconnect and lock out power to the unit before handling capacitors, as they retain a charge even after power is removed — discharge the capacitor using an appropriate resistor tool before touching terminals. Verify that the replacement MFD range and voltage rating match or are compatible with the original equipment specification before installation. Follow all applicable local electrical codes and NEC guidelines when servicing motor start capacitor circuits.

Technical Specifications

• Capacitor Type: Motor Start
• MFD Rating: 324-388 MFD
• Operating Voltage: 110/125 volts
• Frequency: 50/60 Hz
• Shape: Round
• Composition: Phenolic
• Maximum Rated Temperature: 65 degrees C
• Minimum Rated Temperature: -40 degrees C
• Starts Per Hour: 30
• Recommended Use: Residential and Commercial AC and Refrigeration

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M11021