This ClimaTek capacitor combines two capacitors into one unit. Three terminals on the top are labeled "Herm"/"H" for the compressor motor, "Fan"/"F" for the fan, and "C" for the common line.It is a dual capacitor that will power a compressor motor and a fan motor Model: CLM554（Universal model） Shell material: metal Dielectric Material: metallized polypropylene film Capacity: 50+5uf Tolerance: ±6% Rated voltage: 370V/440V AC Frequency: 50 / 60Hz Safety rated: 10,000 AFC Capacitor dimension: Diameter Height Operating temperature: -40 ℃ to +70℃/-104℉to+158℉ This capacitor is used for start-up and operation of AC motors with frequency of 50Hz/60Hz such as Industrial Grade Replacement for Central Air-Conditioners, Heat Pumps, Condenser Fan Motors, and Compressors.It is small in size, lightweight, heat resisting and anti-explosion. Round capacitor can be used to substitute oval shape one with the same MFD AND Volt specs.A 440 volt capacitor can be used in place of a 370 volt, as it is build better, but the 370 can't be used in place of a 440 volt.