Run Start Capacitor, Round, 65/7.5 MFD, 440/370

Mars 12659 – JARD Dual Run Capacitor, 65/7.5 MFD, 370/440 VAC, Round Aluminum Case

The Mars 12659 dual run capacitor from the JARD series is designed for use in HVAC systems requiring simultaneous support for compressor and fan motor operation. With a capacitance rating of 65/7.5 microfarads (MFD) and dual voltage compatibility (370/440 VAC), this capacitor delivers stable electrical support for permanent split capacitor (PSC) motors operating under continuous duty cycles.

Its compact round aluminum case and dual terminal configuration make it suitable for OEM replacement or field-installed upgrades in residential and light commercial condensing units.

Product Application and Use

This dual run capacitor supports both hermetically sealed compressor motors and outdoor fan motors in single-phase systems. Rated for high-load operation with built-in pressure-sensitive safety interrupter, the unit helps maintain proper voltage phase shift and motor torque under varying thermal and electrical conditions.

Performance Features

• ✅ Dual Capacitance: 65/7.5 MFD ±6% tolerance for compressor and fan motor circuits
• ✅ Voltage Rating: Operates at either 370 VAC or 440 VAC, reducing the need for stocking multiple SKUs
• ✅ Dielectric: Oil-filled, non-PCB, meeting UL and RoHS safety and environmental compliance
• ✅ Interrupter: Built-in pressure-sensitive interrupter disconnects internal circuit under fault conditions
• ✅ Case Construction: Rolled aluminum shell with plastic terminal insulator

Dimensional Data

• Form Factor: Round case design
• Diameter: Approximately 2.5 inches
• Height: Approximately 4.6 inches (including terminal cap)
• Operating Temp: -40°C to +70°C

Installation Guidelines

This capacitor should be installed by a qualified HVAC technician. Before service, ensure the equipment is fully de-energized and verify the correct microfarad rating and voltage per the system's nameplate specifications. Secure mounting and correct terminal placement (C, HERM, FAN) are critical to maintaining motor balance and preventing premature component failure.

Trade-Level Usage Considerations

The Mars 12659 is suited for aftermarket service and direct replacement of failed dual capacitors in residential condensers and heat pumps. Its dual voltage capability and single-case design simplify inventory management and reduce service time in the field.

Contractor-Ready Attributes

• ✅ OEM-Compatible Dimensions – Suitable for standard round capacitor brackets and strap mounts
• ✅ Dual Application Use – Supports compressor and outdoor fan motor circuits with one component
• ✅ Field-Reliable Build – Constructed for durability in outdoor enclosure environments
• ✅ Tested to EIA-456-A Standards – Assures operational endurance under sustained motor cycling