This DiversiTech 378-440 Motor Start Capacitor, 378-440 F, 110 volts electrolytic, non-polarized capacitor is designed for normal intermittent service on single-phase A/C motor starting circuits. Features a round, molded case that protects it from oil, dirt, moisture, and grease. Motor Start Capacitor lets the motor turn on and off rapidly, and helps the motor run more efficiently.