ALUMINUM ELECTROLYTIC CAPACITORS Cautions for Using ...

1 10 NOTED esign, Specifications are subject to change without factory for technical specifications before purchase and/or ELECTROLYTIC ( )1. DC ELECTROLYTIC CAPACITORS are polarized. If used with a wrong polarity, it creates an abnormalcurrent resulting in a short circuit or damage to DC bipolar ELECTROLYTIC CAPACITORS for use withuncertain or unknown polarity. DC CAPACITORS cannotbe used in AC circuits. 2. Use within the rated voltage. If a voltage exceeding the rated voltage is applied, itmay cause characteristic deterioration or damage dueto the increased leakage current.

2 When ripple current is loaded, make sure that thepeak value of the ripple voltage does not exceed therated voltage. 3. Do not use in a circuit which requires rapidcharging or discharging. If used in a circuit requiring rapid charging or dis-charging, it may cause characteristic deterioration ordamage to itself due to the heat generated inside thecapacitor. In such cases, contact us for our rapidcharging/discharging CAPACITORS . 4. Use within the rated ripple current. If applied ripple current exceeds rated ripple current,the life of the capacitor may be shortened, or in anextreme case it gets destroyed due to its internal high-ripple type CAPACITORS for such circuits.

3 5. Changes in characteristics due to operatingtemperature. The characteristics of an ELECTROLYTIC capacitor willchange with a change in the temperature. Suchchanges are temporary and the original characteris-tics will be restored at the original temperature (if thecharacteristics are not deteriorated by remaining at ahigh temperature for a long time). If used at a temper-ature exceeding the guaranteed temperature range,the capacitor may be damaged due to the increasedleakage current. Pay attention to the capacitor tem-perature being affected by the ambient temperatureof the unit, the temperature inside the appliance, theheat radiated by another hot component in the unitand the heat inside the capacitor itself due to theripple current.

4 The electrostatic capacitance is normally shown asthe value at 20 C-120Hz. It increases as the tem-perature raises and decreases as it lowers. The tangent of loss angle (tan ) is normally shownas the value at 20 C-120Hz. It decreases as thePlease read product specifications before Using ELNA products. The following Cautions should be observed when Using our ALUMINUM ELECTROLYTIC CAPACITORS to assure their maximumstability and performance. When your application design conditions or operating conditions exceed the limit of theproduct specification, please contact us.

5 If used under conditions beyond the limit of our specifications, it may causedefects such as short circuit, open circuit, leakage, explosion or combustion. Cautions for usage ambient temperature gets high and increases as itgets low. The leakage current increases as the temperaturegets high and decreases as it gets low. 6. Changes in the characteristics due to characteristics of an ELECTROLYTIC capacitor willchange according to the change in the operating fre-quency. The electrostatic capacity is normally shown as thevalue at 20 C-120Hz. It decreases as the frequencyincreases.

6 The tangent of loss angle (tan ) is normally shownas the value at 20 C-120Hz. It increases as thefrequency gets high. The impedance is normally shown as the value at100kHz 20 C. It increases as the frequency ALUMINUM ELECTROLYTIC capacitor life of an ALUMINUM ELECTROLYTIC capacitor termi-nates when it fails due to the deterioration in its elec-tronic characteristics. Temperature and the ripplecurrent since they especially affect the life. See charton Changes in ALUMINUM ELECTROLYTIC capacitorsduring storage. After storage for a long period, whether unused ofmounted on the appliance, the leakage current of analuminum ELECTROLYTIC capacitor will increase.

7 Thistendency is more prominent when the ambient tem-perature is high. If a capacitor has been stored formore than 2 years under normal temperature (shorterif high temperature) and it shows increased leakagecurrent, a treatment by voltage application is recom-mended. Addition of a protective circuit in the designof the appliance is also recommended, consideringthe effect of the initial increased current. 9. Insulation between the capacitor case and thecathode terminal. The capacitor case and the cathode terminal are con-nected through the electrolyte which has uncertainresistance.

8 If a complete insulation of the case isnecessary, add an insulator at assembly. 10 . External sleeve. During a preheating or a hardening of mountingadhensive may cause a sleeve CAPACITORS are usually sleeved with poly vinyl- Cautions for Using ALUMINUM ELECTROLYTIC Capacitors11 NOTED esign, Specifications are subject to change without factory for technical specifications before purchase and/or ELECTROLYTIC ( )chroraide or poly ethylene terephtharate for theindication purpose only. Please do not consider it asan insulation. 11. Fumigation ProcessWhen exporting electronic equipment abroad,fumigation process may be performed on woodenpackaging material with a halogen (compound) gassuch as methyl bromide.

9 Exercise care as thishalogen gas may corrode CAPACITORS . Also, usecaution to epidemic preventive agent as corrosivecomponent such as halogen may be Specific Operating EnvironmentsCapacitors may corrode when stored or used in aplace filled with acidic toxic gases (such as hydrogensulfide, sulfurous acid, nitrous acid, chlorine, bromine,methyl bromide, etc.)If CAPACITORS are used or stored in such environments,please let us Use at a high altitudeThe use of CAPACITORS at high altitudes such as on anairplane causes a large difference between theinternal pressure of the CAPACITORS and the atmos-pheric pressure.

10 However, there is no problem in useunder atmospheric pressure up to about an altitudeof 10,000 meters. Please check the operation ofelectronic equipment at the operating environmentaltemperature because the temperature lowers withincreased Hole pitch adjustment of the PCB to thecapacitors. Set the hole pitch of the PCB to the lead pitch (the F distance in the catalog) of the capacitor. Be carefulsince a short circuit, a cut or an increase in the leak-age current etc. may be caused by the stress given to the lead wire terminals due to the difference be-tween the hole pitch and the lead pitch.