Dual Run Capacitor, Round, 40/5/440 uF

Precision Performance – Jard 12786 Dual Run Capacitor (40/5 MFD, 370/440V)

The Jard 12786 Dual Run Capacitor is engineered to deliver stable, long-term electrical support to both compressor and fan motors in HVAC systems. Designed for 40/5 microfarad applications with a voltage tolerance of 370/440 VAC, this unit provides consistent power factor correction and motor phase balancing in air conditioning and heat pump installations.

Its dual-section configuration supports permanent split capacitor (PSC) motor designs, consolidating functionality for compact and efficient system architecture. The capacitor’s rugged aluminum enclosure offers resilience against environmental stress and physical wear during extended duty cycles.

Benefits for HVAC System Integration

• ✅ Dual Functionality – Supports both hermetic compressor and condenser fan circuits in a single component.
• ✅ Rated for Harsh Environments – Operational temperature range from -40°C to +70°C provides stable performance under variable climate conditions.
• ✅ 370/440 VAC Tolerance – Ensures compatibility across standard high-voltage residential and light commercial systems.
• ✅ Corrosion-Resistant Housing – Aluminum can construction with rolled edge sealing for improved mechanical strength and moisture resistance.

Electrical and Dimensional Specifications

• Capacitance: 40/5 µF ±6%
• Voltage Rating: 370/440 VAC
• Operating Frequency: 50/60 Hz
• Temperature Range: -40°C to +70°C
• Case Height: 3-7/8 inches
• Diameter: 2 inches
• Case Type: Round aluminum

Installation Considerations

The Jard 12786 is designed for field-replaceable integration into condenser units and air handlers. Installation should be completed by qualified HVAC personnel to ensure code compliance and proper electrical connectivity. Key considerations include:

• ???? Required Tools: Insulated screwdrivers, multimeter with capacitance function, wire strippers/crimpers.
• ⚠️ Safety Protocol: Power must be fully disconnected and system capacitors discharged prior to removal or replacement.
• ???? Terminal Verification: Confirm terminal labeling (C, FAN, HERM) prior to connection to avoid reversed polarity or system fault.

Application and Field Use

For HVAC Contractors: The Jard 12786 meets standard specifications for numerous OEM configurations. It is field-proven for reliability in high-cycle residential cooling systems and split-system installations. Its robust design helps minimize repeat service calls caused by premature component failure.

For Technicians in Maintenance Operations: This capacitor’s dual rating reduces inventory load while offering drop-in compatibility with many existing systems. Performance testing with ESR meters or LCR testers confirms long-term electrical integrity post-installation.

Key Features Summary

• ✅ 35/5 µF Dual Section Design – Consolidates two capacitors into one for space and wiring efficiency.
• ✅ High Dielectric Strength – Rated for continuous duty across a wide temperature and voltage spectrum.
• ✅ HVAC-Grade Construction – Built to withstand field vibration, thermal stress, and humidity exposure.
• ✅ Optimized Sizing – Compact cylindrical profile for use in confined electrical enclosures.

Specify the Jard 12786 for Professional Results

Professionals choose the Jard 12786 Dual Run Capacitor for its reliable operation, verified capacitance accuracy, and compliance with industry performance standards. Suitable for new installations or service replacements, this capacitor supports efficient HVAC system operation across a range of environmental conditions.