Supco 3W1 Hard Start Kit, Potential Relay Start Capacitor 208-240V, 35 Amps The 3-Series hard starts provide the service professional with an OEM option when the application calls for a hard start. Combining a potential relay and start capacitor, the 3 series provides a TRUE 3 wire solution. Features Mechanical Potential Relay True 3-wire solution NATE Recognized (Course #1867-0002) Voltage sensing Instant re-start 35 amp relay contacts Includes EZ snap bracket for quick installation 330 VAC capacitor UL Recognized Capacitor size (µF): 88-108