Run Start Capacitor, Round, 20/10 MFD, 440/370

Contractor-Preferred – Mars 12651 Dual Motor Run Capacitor for Demanding HVAC Applications

The Mars 12651 Dual Motor Run Capacitor is engineered for reliable performance in single-phase HVAC systems requiring continuous-duty support for both compressor and fan motors. With a dual capacitance of 20/10 microfarads and a high voltage tolerance of 440 VAC, this unit delivers efficient phase balancing in demanding operating conditions.

Designed for compatibility with standard round-can configurations, the 12651 model simplifies component replacement during service work and supports a range of condenser and air handler motor applications. Its dielectric system is built with metallized polypropylene film to ensure stable operation under continuous electrical and thermal load.

Performance Highlights

• ✅ Dual Motor Support – Provides simultaneous run capacitance for two motor circuits, reducing part count in split-phase systems.
• ✅ 440V AC Rating – Rated for high-voltage residential and commercial HVAC environments, offering increased surge protection and longevity.
• ✅ Stable Capacitance – 20/10 µF capacitance ensures precise phase angle correction for motors requiring consistent torque and speed regulation.
• ✅ Resilient Build – Aluminum case with rolled edge and sealed terminals ensures environmental resistance and mechanical integrity on job sites.

Technical Specifications

• Capacitance: 20/10 microfarads (µF)
• Voltage Rating: 440 VAC
• Shape: Round
• Dielectric: Metallized polypropylene film
• Configuration: Dual-section run capacitor
• Manufacturer: Mars

Installation Considerations

The Mars 12651 is built for straightforward installation using industry-standard quick-connect terminals. However, field installation must be handled by licensed professionals to ensure compliance with electrical codes and correct capacitor selection. Prior to installation, verify the microfarad and voltage rating against the system's motor nameplates or OEM specs.

Applications for Field Technicians

For HVAC Professionals: This capacitor is ideal for multi-motor applications where reliability and fitment speed are critical. Its compact round design facilitates drop-in replacements during maintenance or retrofit work, especially in systems with space constraints.

Key Features

• ✅ High Voltage Durability – 440V rating provides improved protection against line spikes and power fluctuations.
• ✅ Precision Tolerances – Manufactured to industry-standard capacitance deviation to ensure system balance and motor protection.
• ✅ Compact Footprint – Easy to install in standard motor compartments without modification.
• ✅ Contractor-Grade Materials – Built to deliver field reliability in high-cycle HVAC service environments.

Specified for Performance-Critical Systems

Choose the Mars 12651 Dual Motor Run Capacitor for systems requiring consistent dual motor support, accurate capacitance values, and field-tested reliability. This capacitor meets the performance standards expected by industry professionals, reducing downtime and improving service quality across residential and light commercial HVAC platforms.