For Aluminum electrolytic capacitors

When you use aluminum electrolytic capacitors,remember the following.

01 Polarity

Regular electrolytic capacitors has polarity.

Reverse voltage causes short circuit breakage of the capacitor or leakage of electrolyte.Where the polarity in a circuit sometimes reversed or unknown,a bi-polar capacitor should be used.

02 Overvoltage

Do not apply overvoltage continuously.

When overvoltage is applied to the capacitor,leakage current increase drastically.

Applied working voltage to capacitors should not exceed the rated working voltage of capacitor.

03 Operating temperature and life.

Do not use the capacitor over the max operating temperature.

Life time of the capacitor depends on the temperature.

Generally,life time is doubled by decreasing each temperature 10 degree.

Use temperature as low as possible.

04 Vent

It is recommended at least 3mm of space around the vent.

If such space is not provided,the vent will not operate completely.

05 Ripple current

Do not apply a ripple current exceeding the rated maximum ripple current.

Applying too much ripple current to the capacitor causes great heat generation,invites deterioration of properties of case breakage.

Please consult factory if ripple current exceeds the specified limit.

06 Charge and discharging

Frequent and quick charge/discharge generates heat inside the capacitor,cause increase of leakage current,decrease of capacitance,or breakage occasionally.

Consult us for assistance in this application.

07 Storage

When the capacitor is stored for a long time without applying voltage,leakage current tends to increase.

This returns to normal by applying the rated voltage to the capacitor before use.

It is recommended to apply D.C. Working voltage to the capacitor for 30 minutes through 1K Ω of protective series resistor,if it is stored for more than 6 months.

The capacitor should be stored at temperature 5 35 degree,with humidity of 75% or less.

08 Soldering

Improper soldering may shrink or break the insulating sleeve and/or damage the internal element as terminals and lead wires conduct heat into the capacitor.

Avoid too high a soldering temperature and/or too long a soldering time.

09 Mechanical stress on the lead wire and the terminal

Do not apply excessive force to the lead wire and the terminal.

Do not move the capacitor after soldering to the PC board,not carry the PC hoard picking up the capacitor.For their strength,refer to JIS C-5141 and C-5102.

10 Cleaning of boards after soldering

If the capacitor is cleaned in halogenated solvent for organic removing solder flux solvent,the solvent may penetrate into the inside of capacitor,and may generate corrosion.

11 Sleeve material

The standard sleeve material is polyethylene terephthalate.

If exposed to xylene,toluene,etc,and then subjected to high heat,the sleeve may crack.This sleeve is not insulating material.