ELECTRIC DOUBLE LAYER CAPACITORSELECTRIC DOUBLE LAYER CAPACITORS

Cautions for Using Electric Double Layer Capacitors (DYNACAPTM)■ Usage
1. Electric double layer capacitors (EDLC) use a
conductive organic electrolyte.
The use at excessive mounting temperature orexceeding the upper category temperature cancause the electrolyte to leak. Especially,coin andmultilayer coin types for the memory backup(excluding cylindrical type) series use a low elastic
plastic as the sealant in the cell construction likecoin batteries; therefore, avoid using such capacitors in the Vicinity of automotive equipment withsteep temperature change, and heating element
such as motor, relay, transformer, power IC, etc.
because of the risk of leakage of electrolyte.
2. Since EDLC is polarized, do not apply areversed voltage.
EDLC is polarized. If a reversed voltage is applied
for a long time, the leakage current will increaseabruptly, which may cause a decrease in thecapacity, an increase in the internal resistance, andcausing leakage or damage to the product in somecases.
3. Do not apply any voltage higher than theMax. operating voltage (this means the surge
voltage in the case of short-time charge).
If an overvoltage is applied to the product, theleakage current will increase abruptly and theproduct will become overheated, which may cause
a decrease in the capacity, an increase in theinternal resistance, and causing leakage or damage
to the product in some cases.
4. Do not use smoothing a power supply ( forabsorbing its ripple).
Since the internal resistance of EDLC is high, theproduct will be overheated if it is used for smoothing
a power supply (for absorbing its ripple), which may
cause a decrease in the capacity. an increase in
the internal resistance, and causing leakage ordamage to the product in some cases .
5. Do not use in a circuit where quick charge anddischarge are repeated Very often.
In a circuit where quick charge and discharge
are repeated very often , the product will become
overheated, which may cause a decrease in thecapacity, an increase in the internal resistance, andcausing leakage or damage to the product in somecases.
Reduce the charge and discharge currents while
selecting a product with low internal resistance, andrnake sure that the product surface temperaturedoes not rise.
6. EDLC life depends heavily on the ambienttemperature.
①The lifetime of EDLC is seriously affected bychange in ambient temperature. If the temperature
is lowered by 10℃, the lifetime will be approximately doubled. Therefore, the product should beused at a temperature lower than the guaranteedmaximum value for maximum life.

NOTE : ‌Design, Specifications are subject to change without notice.
It is recommended that you shall obtain technical specifications
from ELNA to ensure that the component is suitable for your use.

②If the capacitor is used at a temperature
exceeding its maximum guaranteed temperature,
not only is its life shortened, but increased vapor
pressure of electrolyte or electrochemical reactions
may increase the internal pressure, and causing
leakage or damage to the product in some cases.
7. Do not use the product in an ambient atomsphere containing waterdrops ( condensation ) or
toxic gases.
Although EDLC is sealed, water droplets or toxic
gases may do degradation characteristics, aleakage and corrode the lead wires and the case,which may cause a breaking of the wires.
Avoid abrupt temperature changes, which may cause
water droplets, resulting in product deterioration andelectrolyte leakage.
8. Contact us before connecting the products inseries.
A series connection will cause imbalance in thevoltage, charged to the capacitors and an
overvoltage may be charged to one or more them.
This may cause a decrease in the capacity, anincrease in the internal resistance and causing
leakage or damage to the product in some cases.
When using series connection for several
capacitors, please derate the applied voltage fromthe Max. operating voltage or use balancing
circuits (bleeder resistor, etc.) to compensate for theimbalance in the applied voltage for each capacitor.
Moreover, please ensure the arrangement does notcause temperature fluctuation between capacitors.
9.About vibration.
A terminal blank, a terminal bend, and a crease
may occur by adding too much vibration to acapacitor.
Moreover, depending on the case, an EDLC may
do degradation of the characteristic, breakage, anda leakage.
When you become too much vibration, pleasecontact us.
10.When used on a double sided printed circuitboard, do not overlap the wiring patterns on themounted part.
A short circuit may be created by certain wiringconditions. Should the electrolyte leaks, the circuit
pattern may cause a short circuit, resulting intracking or migration.
11.Do not keep In high temperature and highhumidity atmospheres.
①Avoid high temperature or high humidity or directrays when storing capacitors.
② Keep the product in a place where the temperature is 5℃ to 30℃ and the humidity is lower than60%. Avoid an abrupt temperature change, which
may cause condensation or deterioration of theproduct or liquid leakage. (Recommended storage
term: 1year or less after delivery)③ Do not store EDLC at a place where there is apossibility that they may get water, salt or oil spill.

CAT.No.2023/2024E

ELECTRIC DOUBLE LAYER CAPACITORS④Do not store EDLC at place where the air
contains dense hazardous gas (hydrogen sulfide,sulfurous acid, nitrous acid, chlorine ammonia, etc.).
⑤Fumigation treatment with toxic gas covering
the whole wooden container frames as mothproofing during shipment may leave residual
toxic gas.
⑥Do not store EDLC at a place where it gets
ultraviolet ray or radioactive ray.
12. Capacitors fitted with a relief valve①The relief valve is provided with a valve function
with part of the case made thin to avoid explosion
by increased internal pressure when the capacitor
is under abnormal load such as overvoltage orreverse voltage. After activation of the relief valve,the capacitor must be replaced as it does notrestore.
②For the capacitors with a case relief valve (Cylindrical type), provide a void on the top of the relief
valve so as not to hamper its activation. Make avoid of 2 mm or more for the product of φ18 or lessin diameter in diameter on the top.
13. Use at a high altitude
The use of capacitors at high altitudes such as onan airplane causes a large difference between theinternal pressure of the capacitors and the atmospheric pressure.
However, there is no problem in use under atmosphericpressure up to about an altitude of 10,000 meters.
If the condition is severe like space, please contact us.
■Mounting
1. Do not overheat when soldered.
Depending on the type and size of the board, theproduct may be subjected to overheat, leading toloss of airtightness. This may greatly shorten theproduct life or cause liquid leakage.
ln case of a 1.6mm-thick and single side printed
board. for example, keep the following soldering
conditions: temperature lower then 260℃, timewithin 5 seconds (coin type), 10 seconds (Cylindrical type).
When a board thinner than 1.6 mm or multi-layer
printed board is used, contact us.
ln the case of hand soldering, the iron tiptemperature is lower than 400℃, time is shorter
than 4 seconds.
The coin types and multilayer coin types excluding
the DZ and reflow-compatible coin types use polypropylene as the packing material for sealing andtherefore susceptible to excessive heat. Note thatthe component body temperature shall be controlled
so as not to exceed 90℃ including preheating.
2. When soldering the capacitor to the wiringboard, do not attach the body of the capacitor tothe circuit board.
If the body of the capacitor is attached directly tothe circuit board, the flux or solder can blow throughthe through holes in the circuit board, negatively
impacting the capacitor.
Moreover, the heat influence at the time of soldering
can be reduced by floating the body.

NOTE : ‌Design, Specifications are subject to change without notice.
It is recommended that you shall obtain technical specifications
from ELNA to ensure that the component is suitable for your use.

®

3. Contact us when cleaning is necessary aftersoldering.
Certain types of solvents are not compatible andmay cause damage.
4. Contact us when the product Is attached byadhesive bonding.
Certain types of adhesives are not compatible.
Paste bond partially between the product and theboard so that the product will not adhere completely
to the board.
Do not raise the temperature over the guaranteedvalue while the bond is hardening.
5. Heating conditions of adhesive curing oven
During heating of the adhesive curing oven,application of excessive heat may significantly shorten
the product life or cause liquid leakage. Control thebody temperature so as not to exceed 90℃ during
work while setting the allowable atmospherictemperature below 110℃, and allowable heating timewithin 30 seconds.
For the heating conditions deviating from the above,consult with us providing your temperature profileconditions.
6. Be careful not to apply an excessive force tothe capacitor body, terminals or lead wires.
①Mount the capacitor while making sure that theterminal spacing of the capacitor and the spacingof the holes in the printed wiring board are aligned.
②lf the capacitor body is subjected to stress suchas grabbing, falling, bend, pushing or twisting after
mounted, its terminals may come off, leading toopen, short or liquid leakage.
■Other cautions
1. Emergency procedures
lf the EDLC overheats or starts to smell,
immediately switch off the units main power supply
to stop operation.
Keep your face and hands away from the EDLC,
since the temperature may be high enough to cause
the EDLC to ignite and burn.
2. Periodical inspections should be established
for the EDLC used in industrial appliances.
The following items should be checked:①Appearance : Check if there is leakage.
②Electronic performance : Check the leakage
current, the electrostatic, the internal resistance andother items described in the catalog or the productspecifications.
3. Disposing of EDLC
①Punch a hole or crush the EDLC (to preventexplosion) before incineration at approved facility.
②If they are not to be incinerated, bring them to aprofessional industrial waste disposal company.
4. Other notes
PIease refer to the following literature for anything
not described in the specification or the catalog.
(Technical Report of Japan Electronics and Information Technology Industries Association #EIAJ
RCR-2370 Guideline of notabilia for fixed electric
double layer capacitors”)

CAT.No.2023/2024E