Rectorseal M11055 Motor Start Capacitor 21-25 Mfd 330V

Product Description

The RECTORSEAL M11055 is a motor start capacitor rated at 21-25 microfarads (MFD) and 330 volts, designed to provide the starting torque boost required by single-phase motors in air conditioning and refrigeration systems. Built with a phenolic composition and a round form factor, this capacitor handles up to 60 starts per hour and operates reliably across a temperature range of -40 degrees F to 149 degrees F (equivalent to -40 to 65 degrees C). Licensed HVAC technicians and refrigeration service professionals install this component as a direct service replacement when a motor exhibits hard-start conditions or fails to start under load.

The M11055 is suited for residential and commercial AC systems as well as refrigeration equipment where a motor start capacitor is required. It fits typical compressor and fan motor start circuits that operate on 50 or 60 Hz power. The 330-volt rating and 21-25 MFD range make it a commonly stocked service part for technicians handling a broad range of residential split systems, package units, and commercial refrigeration cases. The dual MFD rating accommodates slight variation in motor start requirements within that specification window.

Key Features

• 21-25 MFD rating provides the starting capacitance range needed for compatible single-phase motors
• 330-volt operating voltage suits standard residential and light commercial circuits
• Rated for up to 60 starts per hour for high-cycle applications
• Phenolic composition offers durability in equipment cabinet environments
• Round shape simplifies drop-in replacement in standard capacitor brackets
• Wide temperature range of -40 to 65 degrees C for use in varied climates and enclosure conditions
• 50/60 Hz compatible for use across standard North American power systems

Compatibility

Recommended for use in residential and commercial AC and refrigeration systems requiring a round motor start capacitor rated at 21-25 MFD and 330 volts. Verify existing capacitor MFD and voltage ratings before installation.

Installation Notes

Capacitor replacement is performed by qualified HVAC or refrigeration technicians. Disconnect and lock out all power to the unit before servicing. Capacitors store a charge even after power is removed — discharge the capacitor safely using an approved discharge tool or resistor before handling or removing terminals. Follow local electrical codes and the equipment manufacturer's wiring diagram when connecting terminals.

Technical Specifications

• Capacitor Type: Motor Start
• MFD Rating: 21-25 MFD
• Operating Voltage: 330 volts
• Frequency: 50/60 Hz
• Maximum Rated Temperature: 65 degrees C
• Minimum Rated Temperature: -40 degrees C
• Starts Per Hour: 60
• Shape: Round
• Terminals: 2
• Composition: Phenolic
• Recommended Use: Residential and Commercial AC and Refrigeration

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M11055