Run Start Capacitor, Round, 80/10 MFD, 440/370

Jard 80/10 µF Dual Run Capacitor – 440V, Round Aluminum Case

The Mars 12821 Dual Run Capacitor is designed to deliver consistent electrical performance for HVAC systems requiring simultaneous support for both compressor and fan motor circuits. With a dual capacitance of 80 µF and 10 µF and a voltage rating of 440V, this unit is suitable for high-demand, continuous-duty applications in single-phase systems.

Constructed with metallized polypropylene film and housed in a sealed round aluminum case, the 12821 capacitor provides field-tested durability for rooftop units, condensers, and packaged HVAC systems. Its standard terminal configuration ensures compatibility with a wide range of OEM systems and mounting brackets.

Component Highlights

• ✅ Dual Capacitance Design: 80 µF for compressor and 10 µF for fan motor within one compact enclosure.
• ✅ Voltage Rating: 440 VAC – Engineered to handle elevated operating voltages and heavy-duty start cycles.
• ✅ Temperature Range: Rated for operation from -40°C to +70°C for stability in varied environmental conditions.
• ✅ Case Material: Round aluminum housing, non-PCB and hermetically sealed for moisture and corrosion resistance.
• ✅ Application Fit: Designed for use in residential and light commercial systems requiring dual motor capacitive support.

Technical Specifications

• Model: Mars 12821
• Capacitance: 80/10 µF ±6%
• Voltage Rating: 440 VAC
• Frequency: 50/60 Hz
• Enclosure: Round aluminum can, sealed
• Terminals: ¼-inch quick-connect male spade terminals

Installation Requirements

The 12821 capacitor should be installed by licensed HVAC technicians. Before replacement, verify correct capacitance and voltage match. Power should be fully isolated, and the existing capacitor must be discharged safely. Standard HVAC tools, including a multimeter and insulated connectors, are recommended to ensure secure and code-compliant installation.

Use Case and Field Performance

This model is suitable for systems where a single capacitor must support both a compressor and a fan motor. Its dual-capacitance format simplifies service work and reduces component count in the field. Designed for rugged operation, the 12821 performs reliably across frequent start-stop cycles and variable load conditions.

Professional Features

• ✅ Integrated Dual Functionality: Combines two capacitors into one, reducing install time and part inventory.
• ✅ HVAC Standard Dimensions: Compatible with common bracket styles and mounting hardware.
• ✅ Voltage and Thermal Stability: Maintains rated values under heat and voltage stress.
• ✅ Reliable Field Service Component: Ideal for new installations or replacements in demanding environments.