Dual Run Capacitor 55/7.5 MFD 440 Volt Round - Air Conditioning Replacement Part Air Conditioning Dual Run Capacitor 55/7.5 Microfarad 440 Volt Common run capacitor for some air conditioning compressors. Used on some A/C compressors. Metal casing. Round shape. 2 terminals with 4 prongs each. Made in Mexico, more reliable then capacitors from China.