Rectorseal M11059 Motor Start Capacitor 43-56 Mfd 330V

Product Description

The RECTORSEAL M11059 is a round motor start capacitor rated at 43-56 microfarads (MFD) and 330 volts, designed to provide the starting torque boost that single-phase compressor and fan motors require during startup. Built with a phenolic composition and rated for operation from -40 degrees F to 149 degrees F (equivalent to -40 to 65 degrees C), this capacitor handles up to 30 starts per hour and is compatible with both 50 Hz and 60 Hz systems. HVAC technicians and refrigeration service pros install this part when an original start capacitor has failed or degraded, causing hard-start or no-start conditions.

The M11059 is suited for residential and commercial air conditioning systems and refrigeration equipment where a motor start capacitor in the 43-56 MFD range is required. Its two-terminal configuration fits standard start relay and hard-start kit wiring layouts found in single-phase compressor circuits. The round form factor accommodates typical capacitor mounting brackets found in condensing units and refrigeration compressor compartments. This capacitor covers a broad MFD range, making it a practical service replacement across multiple unit sizes and configurations.

Key Features

• 43-56 MFD rating covers a wide range of motor start applications
• 330-volt operating voltage suitable for standard single-phase equipment
• Phenolic composition provides durable, heat-resistant construction
• Rated for up to 30 starts per hour for demanding duty cycles
• Wide temperature range: -40 to 65 degrees C operating limits
• Two-terminal, round design fits common mounting hardware and relay configurations

Compatibility

Recommended for use in residential and commercial air conditioning and refrigeration systems requiring a motor start capacitor in the 43-56 MFD, 330-volt range.

Installation Notes

Motor start capacitors are installed by licensed HVAC technicians or qualified refrigeration mechanics. Always disconnect and lock out power to the unit before replacing a capacitor, and discharge any stored voltage in the existing capacitor using an insulated discharge tool before handling. Verify that the replacement MFD value and voltage rating meet or exceed the original equipment specification. Follow NEC guidelines and local codes when servicing capacitors in packaged or split-system equipment.

Technical Specifications

• Capacitor Type: Motor Start
• MFD Rating: 43-56 MFD
• Operating Voltage: 330 volts
• Frequency: 50/60 Hz
• Starts Per Hour: 30
• Maximum Operating Temperature: 65 degrees C
• Minimum Operating Temperature: -40 degrees C
• Shape: Round
• Terminals: 2
• Composition: Phenolic
• Recommended Use: Residential and Commercial AC and Refrigeration

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M11059