The following cautions must
be observed when using electrolytic capacitors.
1. DC Electrolytic Capacitors have the
Make sure of the
polarity, Application of the reversed voltage may cause a short circuit or
damage to the capacitors when the polarity is not determined or
unknown. Note that DC
electrolytic capacitors cannot be for used for AC application.
2. Capacitors are not suitable operating with sudden charge
and discharge are frequently repeated.
In the circuit subjected
to rapid charge cycles, capacitors may be damaged. Be sure
and use special capacitors in these applications.
3. Be sure not to apply a voltage exceeding the rated voltage.
If a voltage exceeding
the rated voltage is applied the leakage current will increase
which may damage the capacitor. For a short period however the
withstands up to the surge voltage.
4. Be sure not to flow excessive ripple current through the capacitor.
The flow of ripple
current over the permissible ripple current will cause heat of the
capacitor, which may decrease the capacitance and damage the capacitor.
capacitors designed for high ripple current application.
5. Capacitors should be stored in cold and dry placed which have
been stored for a long period.
The capacitors after
long storage tends to have high leakage current which may
damage the capacitor by the excessive heat because of high leakage
flow. Use it after voltage treatment(aging).
6. Be sure of the temperature range.
The characteristics of
capacitors change with the operating temperature. This change
is temporary and Restorable with in the specified temperature
range. Be sure not to
use capacitors below or over the recommended temperature range.
7. Be sure not to apply excessive force to the terminals and leads.
The excessive strong
force applied to the terminals and lead wires may break them
and loosen the connections of the internal elements.
8. Capacitance decreases at higher frequencies.
The capacitance value is
measured at 120Hz. The capacitance decreases as the
applied frequency becomes higher whereas increases as the ambient
9. Tangent of loss angle increases at higher frequencies.
The tangent of loss angle(tand
) increase as the applied frequency becomes higher
whereas the ambient temperature becomes higher.
10. Be careful of temperature and time when
Dipping must be performed at the soldering temperature or
less than 260º c for
less than 10 seconds otherwise the capacitors may be
damaged , and the sleeve
of the capacitors may deform and crack from the extremely
11. Be cautions of cleaning the circuit
board after soldering.
protection for sleeve marking and sealing materials on capacitors body will
not be damaged, which should never be washed or cleaned by
halogens agents or
solvents such as trichloroethene, Xyiene or acetone etc.
12. The specification of products are according to characteristic (w),
established by JIS-C5141.