This is a new SPP5 Hard Start Capacitor. This capacitor has a 300% increase on starting torque over the average capacitor and is used to "kick start" compressers and units that are froze up. It is "hopeful attempt" to get your unit going again before replacing a very expensive compresser.
Hard starting compressors Low voltage situations Use on any single phase air-conditioner or refrigeration unit
PTC Positive Temperature Coefficient Relay and Capacitor