Run Start Capacitor, Round, 30/10 MFD, 440/370

Mars 12652 – Dual Run Capacitor, 30/10 MFD, 440V Round, Heavy-Duty HVAC Component

The Mars 12652 dual run capacitor is designed for high-reliability performance in air conditioning and refrigeration systems. Rated at 30/10 microfarads (MFD) and 440 VAC, this capacitor supports continuous duty in condenser fan motors and compressors where dual capacitance is required. Built for field replacement in commercial and residential HVAC units, it meets industry standards for endurance, dielectric integrity, and operational temperature stability.

Intended Applications

This capacitor functions as a start and run capacitor in split-phase and permanent split capacitor (PSC) motor circuits. Its dual-value design simplifies installation where both compressor and fan motor capacitors are required, reducing part count and panel clutter.

Product Highlights

• ✅ Capacitance: 30/10 MFD ±6% tolerance – supports dual-motor operation with precise charge delivery.
• ✅ Voltage Rating: 440 VAC – suitable for high-load commercial and residential systems.
• ✅ Construction: Rolled metal case with plastic cap – sealed for environmental protection.
• ✅ Safety Interrupter: Pressure-sensitive internal protection device activates in case of internal failure.
• ✅ Dielectric: Non-PCB oil-filled, complying with environmental and safety standards.

Dimensional Specifications

• Case Shape: Round
• Diameter: 1-3/4 inches
• Height (body): 3-3/4 inches
• Total Height: 4-1/4 inches (including terminals)
• Operating Temperature: -40°C to +70°C

Installation and Field Use

Proper installation of the Mars 12652 capacitor should be performed by qualified HVAC technicians. Confirm the capacitance and voltage rating match system specifications prior to installation. Use approved crimp terminals and mounting brackets to ensure mechanical and electrical integrity. Always disconnect power and discharge existing capacitors before servicing.

Contractor-Focused Use Case

The Mars 12652 is part of the Mars Blue Box series, designed for high-cycle HVAC applications with minimal drift over time. Its universal fit and field-proven reliability make it ideal for inventory stocking or emergency service replacements. The dual terminal design simplifies routing for compressor and fan circuits within OEM or retrofit panels.

Performance Characteristics

• ✅ Universal Replacement Profile – Compatible with most dual-capacitor HVAC configurations.
• ✅ Factory Tested – Meets EIA-456-A performance standards for life expectancy and dielectric withstanding voltage.
• ✅ Dual Terminal Configuration – Clearly marked “C,” “FAN,” and “HERM” terminals for reliable field wiring.
• ✅ Application: Compressor and fan motor combination use in residential split systems.