Dual Run Capacitor, Round, 50/5/440 uF

HVAC System Support – Jard 50/5 µF Dual Run Capacitor, 370/440V

The Mars 12790 Jard Dual Run Capacitor is engineered to deliver consistent reactive power to both compressor and fan motors within single-phase HVAC systems. Featuring a dual-capacitance configuration of 50/5 microfarads, this unit combines operational efficiency and voltage stability for long-term service reliability in residential and light commercial applications.

Constructed with metallized polypropylene film and encased in a sealed aluminum shell, the capacitor is non-PCB and designed for use in systems requiring a 370/440 VAC rating. This model supports 50/60 Hz operation and is sized for compatibility with a wide range of OEM and aftermarket installations.

Performance-Oriented Design

Capable of operating in ambient temperatures from -40°C to +70°C, the 12790 model provides dependable performance in diverse environmental conditions. Its durable aluminum case resists corrosion and mechanical stress, making it suitable for rooftop units, pad-mounted condensers, and other exposed HVAC assemblies. Standard quick-connect terminals enable straightforward field service and replacement.

• ✅ Dual Capacitance Output – 50/5 µF configuration supports compressor and fan motor loads in a single unit.
• ✅ Voltage Rating: 370/440 VAC for compatibility with dual-rated systems.
• ✅ Wide Temperature Range – Operational from -40°C to +70°C for indoor/outdoor applications.
• ✅ Non-PCB Aluminum Can – Hermetically sealed for resistance to moisture, vibration, and contaminants.
• ✅ Space-Conscious Design – Round profile with industry-standard dimensions for quick replacement.

Technical Specifications

• Capacitance: 50/5 µF ±6%
• Voltage Rating: 370/440 VAC
• Frequency: 50/60 Hz
• Case Height: 3-7/8 inches
• Diameter: 2 inches
• Terminals: ¼-inch spade connectors
• Dielectric Material: Metallized polypropylene film

Installation Requirements

Professional installation is strongly recommended to ensure proper electrical matching and safety compliance. Capacitor replacement requires voltage verification, discharge procedures, and secure terminal attachment. This component is designed for quick change-out with minimal configuration adjustment when matching OEM microfarad and voltage ratings.

Contractor Application Benefits

HVAC professionals rely on the Mars 12790 for its electrical stability and dual-function efficiency in new installations and service jobs. Its compact form factor and voltage versatility allow it to serve as a universal replacement for many dual-run capacitor applications across a range of platforms. The high endurance rating ensures operational continuity under frequent cycling conditions.

Performance Features

• ✅ Supports Both Fan and Compressor Motors – Reduces parts inventory and simplifies installation logistics.
• ✅ Universal HVAC Compatibility – Meets requirements for most systems rated at 370 or 440 VAC.
• ✅ Reliable Dielectric Stability – Maintains capacitance values over long duty cycles and variable loads.
• ✅ Field-Ready Design – Sized and terminated for fast, secure integration into existing mounting brackets.