Single Run Capacitor, Oval, 20/440 uF

Mars 12937 – Jard 20 MFD 440V Oval Motor Run Capacitor The Mars 12937 capacitor is part of the Jard series and provides 20 microfarads (µF) of capacitance with a 440 VAC rating. It is designed for continuous-duty applications in HVAC systems using permanent split capacitor (PSC) motors, including condenser fans, blowers, and compressors. This oval-shaped unit utilizes a metallized polypropylene film dielectric and features an aluminum case with a built-in pressure-sensitive interrupter for fail-safe operation. The design meets standard safety and performance requirements for motor run capacitors. Specifications Manufacturer: Mars (Jard line) Model Number: 12937 Capacitance: 20 µF Voltage Rating: 440 VAC Frequency: 50/60 Hz Case Style: Oval Dielectric Material: Metallized polypropylene Terminals: ¼" quick-connect male spade terminals Temperature Range: -40°C to +70°C Construction: Aluminum canister, non-PCB Safety Device: Pressure-sensitive interrupter Approx. Dimensions: 4" H x 2.5" W x 2.056" D Applications This component is suitable for HVAC systems requiring a 20 µF capacitor for single-motor support in applications such as: Condenser fan motors Evaporator blowers Circulator pumps Light-duty refrigeration systems The oval configuration allows placement in limited-clearance installations where cylindrical units may not fit. Installation Guidelines Disconnect all power and discharge capacitors before handling Confirm that the rated capacitance and voltage match the original component Use appropriate mounting hardware or brackets for secure installation Ensure compliance with local electrical codes and equipment manufacturer specifications Installation should be performed by qualified personnel trained in HVAC electrical systems. Improper wiring or selection can lead to system failure or unsafe operation. Key Performance Features Rated for continuous operation in demanding environments Oval aluminum case for compact mounting Internal protection against dielectric breakdown Non-PCB construction meets environmental safety requirements Compatible with a wide range of OEM and aftermarket systems