Mars Dual Run Capacitor, Round Air Conditioning Replacement Part, 40/5 MFD 440 Volt

Mars 12788 – Jard by Mars 45/5 MFD, 440V Dual Motor Run Capacitor The Mars 12788 is a dual-section motor run capacitor engineered for use in HVAC systems utilizing permanent split capacitor (PSC) motors. With capacitance values of 45 and 5 microfarads (MFD) and a voltage rating of 440 VAC, this unit is designed to support both the compressor and fan motor within a single compact enclosure. Constructed with a metallized polypropylene film dielectric, the capacitor is hermetically sealed and oil-filled for durability and heat resistance. An internal pressure-sensitive interrupter provides overpressure protection. This non-PCB capacitor meets UL and RoHS compliance standards and is suitable for both OEM and replacement applications in residential and light commercial systems. Technical Specifications Capacitance: 45/5 MFD (±5%) Voltage Rating: 440 VAC Frequency: 50/60 Hz Case Type: Round aluminum Dielectric Material: Metallized polypropylene film Construction: Hermetically sealed, oil-filled, non-PCB Safety Feature: Pressure-sensitive internal interrupter Operating Temperature Range: -40°C to +70°C Terminals: ¼" male quick-connect (dual section) Certifications: UL recognized, RoHS compliant Applications Designed for dual-motor circuits in PSC-based air conditioning and heat pump systems Commonly used in systems requiring both fan and compressor support with a single capacitor Suitable for use in residential condenser units and light commercial HVAC equipment Matches applications specifying 45/5 MFD at 440V Installation Notes Always confirm microfarad and voltage ratings match system specifications before replacement Discharge capacitor before handling; follow appropriate electrical safety practices Use standard mounting brackets or clamps for secure installation Terminal connections must be tight and properly oriented Installation should be completed by licensed HVAC professionals in accordance with local codes