Partners Choice 01-0287 25/10/440 Round Dual Run Capacitor. This 25/10/440 Round Dual Run Capacitor is an electrical capacitor that changes the current to multiple windings of an electric motor to create a magnetic field. It is used in air conditioners, and forced air furnaces. This Partners Choice 01-0287 25/10/440 Round Dual Run Capacitor is designed to eliminate motor hesitation, noise, and performance drops. This Capacitor increases energy efficiency and helps the motor to run in an effective manor for extended life. When installing or replacing this Capacitor, the capacitor should be discharged before it is removal.