Datasheet

Product Specification
EGC-RF-1-0
Electric Double Layer Capacitor RF series
10
10.Notes in using Electric Double Layer Capacitors
Notice
1. Life time
Gold capacitors have a longer lifetime than secondary batteries, but their life is still limited. During use,
capacitance decrease and internal resistance rises. Take sufficient back-up time into consideration when designing
circuit. The lifetime of a Gold Capacitor is greatly affected by ambient temperature, applied voltage and operating
current. By reducing these factors as much as possible, capacitor lifetime can be lengthened.
Using products beyond end of the lifetime may change characteristics rapidly, short-circuit, operate pressure relief
vent, or leak electrolyte.
2.Residual electric charge
Since Gold capacitors can hold great charge, there may be residual electric charge that could damage other
low-withstanding voltage parts such as semiconductors.
3.Ambient temperature and humidity
•Capacitor life is affected by operating temperature. In general lowering ambient temperature by 10°C will double the
life of a capacitor. Use the capacitor at the lowest possible temperature under the maximum operating temperature.
•Operation above the maximum specified temperature not only shortens capacitor life, but can also cause serious
damage such as electrolyte leakage. Verify the operating temperature of the capacitor by taking into consideration
not only the ambient temperature and temperature inside the unit, but also the radiation from heat generating
elements inside the unit (power transistor, IC's, resistors, etc.) and self-heating due to ripple current. Be careful not
to place heat-generating elements across from the capacitor on the opposite side of the PCB.
•The lifetime of GOOLD CAPACITOR is influenced by surrounding humidity. When humidity rises, the lifetime of
GOLDCAPACITOR shortens. Especially, there is a possibility that lifetime shortens extremely due to rapid
characteristic deterioration when using it in the environment of the high temperature and humidity.
4.Voltage drop during back-up operation
Take careful notice of the voltage drop caused by the instantaneous operating current and the internal resistance of
the Gold Capacitor during the switch from power - failure - detection to back-up mode. Because internal resistance
varies by product, use the following table to decide the correct operating (discharge) current.
Operating current
Series
0.68F(5.5V) 0.68F(3.6V)
RF 20mA or less 25mA or less
5. External sleeve
External sleeve is not intended to ensure the electrical insulation, and thus capacitors should not be used in
the environment that requires electrical insulation.
Panasonic Electronic Devices Co.,Ltd.