Dual Run Capacitor, Round, 35/5/440 uF

Contractor-Grade Performance – Jard 12783 Dual Run Capacitor, 35/5 MFD, 370/440V

The Jard 12783 Dual Run Capacitor is engineered for use in split-phase HVAC systems where both compressor and fan motor support are required from a single component. With a capacitance rating of 35/5 microfarads and a dual-voltage tolerance of 370/440 VAC, this capacitor meets the electrical and mechanical demands of field installations across residential and light commercial applications.

Constructed with metallized polypropylene film and an aluminum cylindrical enclosure, it provides stable dielectric performance, thermal resilience, and compatibility with a wide range of OEM specifications. The capacitor is suitable for systems operating at 50/60 Hz and within ambient temperatures from -40°C to +70°C.

Performance and Application Highlights

• ✅ Dual Section Design – Supplies dedicated capacitance to both the compressor (35 MFD) and the condenser fan motor (5 MFD).
• ✅ 370/440 VAC Rating – Designed for universal replacement scenarios, accommodating fluctuating voltage conditions common in HVAC systems.
• ✅ Aluminum Canister – Corrosion-resistant housing with rolled edges supports vertical and horizontal mounting configurations.
• ✅ Pressure-Sensitive Interrupter – Integrated fail-safe mechanism disconnects internal connections under fault conditions to prevent rupture.

Technical Specifications

• Model: Mars 12783 / Jard
• Capacitance: 35/5 μF (microfarads)
• Voltage Rating: 370/440 VAC
• Frequency: 50/60 Hz
• Operating Temp Range: -40°C to +70°C
• Case Type: Round aluminum
• Case Height: 3-1/8 inches
• Diameter: Approximately 2 inches

Installation Guidance

Installations must be conducted with all power sources isolated. Always verify capacitance and voltage compatibility prior to wiring. Terminal identification (C, FAN, HERM) should be cross-referenced with system schematics. Proper use of terminal connectors and torque tools is recommended to prevent overheating or vibration-related failure. Ensure the capacitor is secured in an upright position within the service panel or bracketed housing, where applicable.

Use Case Considerations

Field Technicians:

This unit is ideal for service replacements involving worn-out or out-of-tolerance capacitors in condensing units, where reliable dual-functionality is required in a single enclosure. Its compact footprint and universal voltage support streamline inventory stocking and reduce misapplication risks.

Key Features Summary

• ✅ Film-Foil Dielectric – Stable electrical performance with low ESR.
• ✅ Dual Motor Support – Consolidates compressor and fan support in one device.
• ✅ UL Recognized – Conforms to applicable safety and construction standards.
• ✅ Wide OEM Compatibility – Suitable for many legacy and current model AC units.

Maintain System Integrity with Proper Components

For professionals seeking dependable dual run capacitors in 35/5 MFD configurations, the Jard 12783 offers field-tested durability and performance for HVAC systems operating on 370V or 440V supplies. Proper capacitor selection and installation play a critical role in maintaining energy efficiency and motor reliability.