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A dual run capacitor that combines a 70 MFD compressor section and a 7.5 MFD fan section in one oval can, replacing two separate capacitors. It is rated 370/440V, so it works in both 370V and 440V residential AC systems, and has three labeled terminals: HERM for the compressor, FAN for the condenser fan motor and COM for the contactor. The 70/7.5 split suits larger residential condensing units where the compressor needs a big start boost and the fan motor needs little. Compared with buying two single capacitors, it saves space and wiring inside the control panel; the trade-off is that if one section fails, the whole can must be replaced.
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This is a 70+7.5 MFD dual run capacitor. The 70 MFD side powers the compressor, and the 7.5 MFD side powers the condenser fan motor. One capacitor takes the place of two separate run capacitors, which saves space and simplifies wiring.
It is rated 370/440V and has three terminals: HERM for the compressor, FAN for the condenser fan motor, and COM for the common connection to the contactor. The larger MFD value is always the compressor side, and the smaller value is the fan motor side.
A 440V capacitor can replace a 370V capacitor of the same MFD, because the voltage rating is a maximum, not the operating voltage. A 370V capacitor must not replace a 440V one. Round and oval cans are electrically interchangeable at the same rating, but the strap or bracket must hold the can securely.
