Datasheet
6© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard A4081_ALC70 • 4/29/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Snap-In Aluminum Electrolytic Capacitors – ALC70, +85°C
Shelf Life
The capacitance, ESR, and impedance of a capacitor will not change signicantly after extended storage periods; however,
the leakage current will very slowly increase. KEMET products are particularly stable and allow a shelf life in excess of three
years at 40°C. See sectional specication under each product series for specic data.
Re-age (Reforming) Procedure
Apply the rated voltage to the capacitor at room temperature for a period of one hour or until the leakage current has fallen
to a steady value below the specied limit. During re-aging, a maximum charging current of twice the specied leakage
current or 5 mA (whichever is greater) is suggested.
Reliability
The reliability of a component can be dened as the probability that it will perform satisfactorily under a given set of
conditions for a given length of time.
In practice, it is impossible to predict with absolute certainty how any individual component will perform. Therefore, we
must utilize probability theory. It is also necessary to clearly dene the level of stress involved (e.g., operating voltage, ripple
current, temperature, and time.) Finally, the meaning of satisfactory performance must be dened by specifying a set of
conditions, which determine the end of life of the component.
KEMET provides an online life calculator that can be used to predict hours of life for a given part number in specic
application conditions. This can be found at: https://elc.kemet.com.
End of Life Denition
Catastrophic failure: short circuit, open circuit or safety vent operation
Parametric Failure:
• Change in capacitance > ±15%
• Leakage current > initial specied limit
• ESR > 3X ESR Limit