Rectorseal M11058 Motor Start Capacitor 36-43 Mfd 330V

Product Description

The RECTORSEAL M11058 is a round motor start capacitor rated at 36-43 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, the M11058 is engineered for durability across a broad operating temperature range of -40 degrees F to 149 degrees F (65 degrees C maximum). Rated for 50/60 Hz systems, this capacitor supports up to 30 starts per hour, making it suitable for applications with frequent cycling demands. HVAC technicians and refrigeration service professionals install this capacitor as part of motor start circuits in split-system air conditioners, package units, and refrigeration equipment.

The M11058 is recommended for use in residential and commercial air conditioning and refrigeration systems. It fits into motor start circuits where a brief capacitance boost is needed to bring the compressor or fan motor up to running speed before dropping out of the circuit. Its round form factor and phenolic housing make it a practical fit in standard capacitor brackets and control compartments found in typical rooftop units, split systems, and reach-in refrigeration equipment.

Key Features

• 36-43 MFD capacitance range suits a variety of motor start applications
• 330-volt operating voltage for single-phase motor start circuits
• Rated for up to 30 starts per hour, supporting high-cycle applications
• Phenolic composition housing for resistance to heat and electrical stress
• Round shape fits standard capacitor mounts in HVAC and refrigeration equipment
• Compatible with 50 Hz and 60 Hz systems

Compatibility

Designed as an OEM-style replacement motor start capacitor for residential and commercial air conditioning and refrigeration equipment requiring a 36-43 MFD, 330-volt round start capacitor.

Installation Notes

Motor start capacitors are installed by licensed HVAC technicians or qualified refrigeration service professionals. Always disconnect and lock out power to the unit before handling capacitors, and discharge any residual voltage stored in the existing capacitor before removal. Verify that the replacement MFD rating and voltage rating meet or exceed the original equipment specification before installation. Work must comply with applicable local codes and the National Electrical Code (NEC).

Technical Specifications

• Capacitor Type: Motor Start
• MFD Rating: 36-43 MFD
• Operating Voltage: 330 volts
• Frequency: 50/60 Hz
• Shape: Round
• Composition: Phenolic
• Maximum Operating Temperature: 65 degrees C
• Minimum Operating Temperature: -40 degrees C
• Starts Per Hour: 30
• Recommended Use: Residential and Commercial AC and Refrigeration

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: M11058