Dual Run Capacitor, Round, 45/7.5/440 uF

HVAC-Grade Performance – Jard 45/7.5 µF Dual Run Capacitor, 370/440V

The Mars 12789 Jard Dual Run Capacitor is a heavy-duty component designed to support continuous operation in HVAC systems that utilize split-phase motors. This capacitor combines two capacitance values—45 µF for the compressor and 7.5 µF for the fan—within a single cylindrical housing, offering streamlined installation and reliable circuit separation for dual-motor configurations.

Manufactured with metallized polypropylene film in an oil-free, non-PCB aluminum canister, this capacitor is rated for 370/440 VAC and 50/60 Hz applications. It is suitable for use in both air conditioning condensing units and air handlers across a wide range of system types.

Designed for Field Durability

The Jard 12789 is built for longevity under thermal stress, with a wide operational temperature range from -40°C to +70°C. Its durable aluminum housing protects internal components against corrosion and vibration common in rooftop and pad-mounted units. The round profile allows efficient enclosure fit and supports standard ¼" quick-connect terminals for ease of replacement in field service.

• ✅ Dual Capacitance Configuration – Supports both compressor and fan motor circuits in one unit.
• ✅ High Voltage Rating – 370/440 VAC for compatibility with a broad range of HVAC applications.
• ✅ Wide Temperature Operating Range – Reliable from -40°C to +70°C in indoor and outdoor settings.
• ✅ Rugged Construction – Non-PCB aluminum can with sealed top ensures long-term integrity.
• ✅ Space-Efficient – Standard 3-7/8" height × 2" diameter for use in compact enclosures.

Technical Specifications

• Capacitance: 45/7.5 µF ±6%
• Voltage Rating: 370/440 VAC
• Frequency: 50/60 Hz
• Temperature Range: -40°C to +70°C
• Case Height: 3-7/8 inches
• Terminal Type: ¼-inch male spade connectors
• Dielectric: Metallized polypropylene film

Installation Notes

Installation should be performed by qualified HVAC personnel to ensure system compatibility and adherence to safety protocols. Always verify microfarad rating and voltage requirements before installation. Capacitor should be discharged using proper procedures prior to handling. Secure mounting and proper terminal orientation are critical for performance and compliance with service codes.

Contractor-Focused Benefits

The 12789 capacitor is engineered to meet industry expectations for endurance and reliability. Its high-voltage tolerance and stable capacitance output help maintain motor torque and system efficiency during peak load cycles. The dual configuration reduces component count and wiring complexity in the field, streamlining routine replacements and retrofit installations.

Performance Summary

• ✅ Dual-Motor Support – Replaces separate fan and compressor capacitors with one dual-section unit.
• ✅ Standard Dimensions – Compatible with most residential and light commercial HVAC platforms.
• ✅ Corrosion-Resistant Housing – Aluminum casing resists environmental degradation.
• ✅ Service-Grade Build – Rated for frequent cycling and long-term electrical load.