5 MFD Capacitor 370 or 440 VAC 5uf Oval Run Capacitor for Fan Motor Blower Condenser in Air Handler Straight Cool or Heat Pump Air Conditioner and Pool Pumps by The HVAC Genius

A capacitor is an electric component that temporarily stores an electrical charge. A “run capacitor” supports electric motors, such as in air conditioner or heat pump units, a fan motor, and a compressor motor. The capacitor has two terminals. Capacitors come in a variety of sizes, depending on the capacitance (µF or MFD), such as 40 plus 5 µF, and also the voltage. A 440-volt capacitor can be used in place of a 370-volt, as it is built better, but the 370 can’t be used in place of a 440-volt. It will work for a while and will fail prematurely, as exceeding the capacitor’s rated voltage will cause the dielectric to break down and the capacitor to short out. Same as an electric wire- 600V rated wire is better than 300V one. The capacitance(µF or MFD) must be the same or stay within 10%+ or 5%- of its original value. Example: 50 µF cap can be substituted by 47.5 to 55 µF with the same or better voltage rating capacitor. Round oval-shaped run capacitors are commonly used for air conditioning, to help in the starting of the compressor and the condenser fan motor.

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