Run Start Capacitor, Round, 70/10 MFD, 440/370

Mars 12869 – 70/10 MFD 440V Dual Round Run Capacitor for HVAC Motor Applications

The Mars 12869 is a dual-value round run capacitor rated at 70/10 microfarads (MFD) and 440 volts AC. Designed for continuous-duty service in HVAC systems, this capacitor supports the operation of two separate motors—typically a compressor and a fan motor—in a single-phase permanent split capacitor (PSC) circuit. It is built to meet EIA-456-A performance standards and is UL-recognized for use in both residential and light commercial applications.

Designed for Dual Motor Systems

This capacitor simplifies wiring and installation by integrating two capacitance values in one component. Commonly used in split system air conditioners and heat pumps, it supports efficient operation of both the compressor and the condenser fan motor. Its construction includes a rolled aluminum case and pressure-sensitive interrupter for added operational safety in the event of internal failure.

Technical Specifications

• Capacitance: 70/10 MFD ±6%
• Voltage: 440 VAC, 50/60 Hz
• Case Type: Round aluminum shell
• Terminals: Standard dual-terminal (¼" quick connect) labeled C, FAN, HERM
• Dielectric: Oil-filled, non-PCB
• Temperature Range: -40°C to +70°C

Dimensional Data

• Diameter: Approx. 2.5 inches
• Height: Approx. 4.75 inches (not including terminals)

Installation Requirements

The Mars 12869 should be installed by qualified HVAC technicians. Always confirm both capacitance values and voltage rating against the system nameplate before replacement. Ensure power is fully disconnected and residual charge is discharged prior to removal of the existing unit. Mount securely using approved brackets or capacitor straps and verify terminal connections per the system diagram.

Contractor-Oriented Benefits

• ✅ Dual-Value Configuration – Combines compressor and fan motor support in one device
• ✅ 440V High-Voltage Rating – Suitable for residential and light commercial systems
• ✅ UL Recognized / EIA-456-A Compliant – Validated for safety and electrical endurance
• ✅ Pressure-Sensitive Interrupter – Protects system in event of internal capacitor failure
• ✅ HVAC-R Standard Size – Designed for compatibility with most OEM round capacitor brackets