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1. |
The electric double-layer
capacitors (DYNACAP) have an inherent polarity.
Before using, confirm the polarity. If the capacitor
has a reversed voltage, there will be an extremely
large leakage current, a capacitance reduction, and
an increased internal resistance. In some scenarios,
the capacitor will be ruined.
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2. |
Never apply voltages beyond
the rated voltage.
When a voltage exceeding the rated voltage is applied,
there will be a large leakage current, intense heat
generation, and capacitance reduction. Also, the
internal resistance will increase and, in some cases,
the capacitor will be ruined.
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3. |
Do not use the electrical
double-layer capacitor (DYNACAP) for power supply leveling (ripple
attenuation).
Because electrical double-layer capacitors (DYNACAP)
have large internal resistances, using these capacitors
for power supply leveling (ripple attenuation) will
cause excessive internal heating, capacitance reduction,
an increased internal resistance, and, in some cases,
a ruined capacitor.
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4. |
Do not use the electrical
double-layer capacitor (DYNACAP) in circuits that repetitively
and rapidly charge and discharge.
Using electrical double-layer capacitors (DYNACAP)
in circuits where there is frequent and rapid charging
and discharging will cause excessive internal heating,
capacitance reduction, an increased internal resistance,
and, in some cases, a ruined capacitor
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5. |
The lifespan of the electrical
double-capacitor (DYNACAP)
The ambient temperature has a major effect on the
lifespan of the electrical double-layer capacitor
(DYNACAP). The lifespan is approximately doubled
when the temperature is reduced by 10°C. The
capacitor should be placed as far as possible from
heat sources.
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6. |
Voltage drops in electrical
double-layer capacitors (DYNACAP) when used as a backup power
source.
Note that there will be a momentary drop in voltage
due to the internal resistance of the electrical
double-layered capacitor. The momentary drop is caused
by the operating current when the backup power supply
switches to the backup mode. Especially, when a power
outage is detected.
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7. |
Ambient gases during use
Do not use the electrical double-layer capacitor
(DYNACAP) in environments where there are water
droplets or poisonous gases. Such environments
can cause the lead wires and case of the electrical
double-layer capacitor (DYNACAP) case to corrode,
leading to open circuits.
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8. |
Storing the electrical
double-layer capacitors (DYNACAP)
Be careful not to store the electrical double-layer
capacitor (DYNACAP) in a high temperature, high humidity
environment. Store the capacitor in a cool, dry place,
with a temperature between 5 and 30°C and a relative
humidity of less than 60%. Avoid rapid changes in
temperature because this variance can cause condensation
or can damage the product.
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9. |
Double-sided circuit boards
When electrical double-layer capacitors (DYNACAP)
are used on double-sided circuit boards, use
caution that the interconnect pattern does not
cross the location where the capacitor is attached.
Depending on how the capacitor is mounted, there
is a danger that such a layout could cause a
short circuit.
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10. |
When soldering the capacitor
to the wiring board, do not attach the body of the capacitor
to the circuit board.
If the body of the capacitor is attached directly
to the circuit board, the flux or solder can blow
through the through holes in the circuit board, negatively
impacting the capacitor.
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11. |
After attaching the capacitor,
do not forcibly tilt or invert the body of the capacitor.
The added force may cause the leads to become detached.
If a strong force is applied to the internal cell
by the lead, the capacitor may experience a permanent
loss in performance.
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12. |
Avoid scratching or damaging
the leads.
The leads are coated with a solder plating. If the
leads are scraped with sandpaper, etc., the plating
will be removed making the capacitor difficult to
solder.
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13. |
Avoid excessively heating
the capacitor during solder dip.
The amount of excess heat applied to the capacitor
will vary depending on the type and size of the circuit
board. The excess heat will greatly diminish the
lifespan of the product. If the printed wiring board
used has a thickness of 1.6mm, then dip at 260°C
for no more than five seconds. Contact your sales
or technical representative if the printed wiring
board used is less than 1.6mm thick.
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14. |
Circuit board cleaning
after the solder dip
Contact your sales or technical representative regarding
the circuit board cleaning process because some types
of solvents can damage the inside of the electrical
double-layer capacitors (DYNACAP).
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15. |
Adhesive coating materials
for bonding.
Contact yours sales or technical representative regarding
the bonding process because bonding to the printed
wiring board and using adhesives may cause damage
to the electrical double-layer capacitor. Contact
your sales or technical representative in cases where
the adhesive or coating will cover the capacitor
plug as well. When hardening the adhesive or the
coating material, be sure not to exceed the maximum
use temperature for the capacitor.
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16. |
Connecting electrical double-layer
capacitors (DYNACAP) in series
When electrical double-layer capacitors (DYNACAP)
are connected in series, if the voltage balance between
the capacitors is lost, then one or more capacitors
may be subjected to an excessive voltage. This excessive
voltage may destroy the capacitor. Contact your sales
or technical representative if you plan to connect
the capacitors in series.
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17. |
Heating conditions in
adhesive curing furnaces, etc.
For example, subjecting the capacitor to excessive
heat in an adhesive curing furnace can substantially
reduce the life expectancy of the capacitor. Cure
the adhesive for no more than 60 seconds at the allowable
ambient temperature of no more than 140°C.
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18. |
Other
When using the electrical double-layer capacitor (DYNACAP) read
and understand not only the delivery specifications and the
catalog, but also the following documents: The Electronics
Industry Association of Japan Technical Report EIAJ RCR-2370
(Notes and Guidelines in Using Electrical Double-layer Capacitors
for Electronic Equipment).
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