Aluminum Electrolytic Capacitors

ELECTRIC DOUBLE LAYER CAPACITORSCautions for Using Electric Double Layer Capacitor (DYNACAP , POWERCAP)Usage1. Electric double layer capacitors (EDLC) use aconductive organic electrolyte.The use at excessive mounting temperature orexceeding the upper category temperature cancause the electrolyte to leak. Especially,coin andmultilaver coin types for the memory backup (DB,DBN, DBJ, DBS, DX, DXJ, DXN, DXS, DH, DK, DC,DCK, DS, and DSK series) excluding the DZ, DZH,DZN and DP series use a low elastic plastic as thesealant in the cell construction like coin batteries;therefore, avoid using such capacitors in the vicnityof automotive equipment with steep temperaturechange, and heating element such as motor, relay,transformer, power IC, etc. because of the risk ofleakage of electrolyte.2. Since EDLC is polarized, do not apply areversed voltage.EDLC is polarized. If a reversed voltage is appliedfor 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 theoperating maximum voltage (this means the surgevoltage 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 causea decrease in the capacity, an increase in theinternal resistance, and causing leakage or damageto 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 smoothinga power supply (for absorbing its ripple), which maycause a decrease in the capacity. an increase in theinternal 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 dischargeare repeated very often , the product will becomeoverheated, 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 whileselecting a product with low internal resistance, andrnake sure that the product surface temperaturedoes not rise.6. EDLC life depends heavily on the ambienttemperature.The lifetime of EDLC is seriously affected bychange in ambient temperature. If the temperatureis lowered by 10, the lifetime will be approximatelydoubled. Therefore, the product should beused at a temperature lower than the guaranteedmaximum value for maximum life.If the capacitor is used at a temperatureexceeding its maximum guaranteed temperature,not only is its life shortened, but increased vaporpressure of electrolyte or electrochemical reactionsmay increase the internal pressure, and causingleakage or damage to the product in some cases.7. Note that a voltage drop in EDLC occurs duringbackup.In a case where discharge current is large, or alarge current flows instantaneously. an electricdouble layer capacitor may not operate at the startof discharge because of a large voltage drop (IRdrop) caused by the product with the DC internalresistance.Please consult us for a large dischargecurrent (inthe case of other series except DZ, DZH, DZN andDP series: when larger than 1mA1×CFasthe internal resistance varies by each series (Recommendationdischarge current: less than 1mA/F at 20)8. Do not use the product in an ambient atomspherecontaining waterdrops ( condensation ) ortoxic gases.Although EDLC is sealed, water droplets or toxicgases 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 causewater droplets, resulting in product deterioration andelectrolyte leakage.9. Contact us before connecting the products inserles. 10.About vibration.A terminal blank, a terminal bend, and a creasemay occur by adding too much vibration to acapacitor.Moreover, depending on the case, an EDLC maydo degradation of the characteristic, breakage, anda leakage.When you become too much vibration, pleasecontact us.11.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 circuitpattern may cause a short circuit, resulting intracking or migration.12.Do not keep in high temperature and highhumidity atmospheres.Avoid high temperature or high humidity or directrays when storing capacitors.Electric Double Layer CapacitorsCAT.No.2010/2011E