Conductive Polymer Aluminum Solid Capacitors

1.1 Prohibited circuits

(1) Leakage current of the OS-CON may increase in the following conditions.

(a) Soldering

(b) When voltage is not applied : high temperature no-load test, high temperature and high humiditynoload test,

　rapidly changing temperature test, etc.

(2) Avoid the use of the OS-CON in the following type of circuits because leakage current may increase.

(a) High-impedance circuits

(b) Coupling circuits

(c) Time constant circuits

(d) Other circuits that are significantly affected by leakage current.

✽ If you plan to use 2 or more OS-CONs in a series connection, please contact us before use。

1.2 Failure and life-span

The failure rate is 0.5 % /1000 h (Confidence level : 60 %) based on JIS C 5003.

The prospective failure is not zero. The mainly failure modes are as follows.

1.2-1 Contingency failure

The most common failure mode is a short circuit. Mainly caused by the soldering or operating temperature

environment, along with heat stresses, electrical stresses or mechanical stressesas follows.

・ Applying voltage over the rated voltage.

・ Applying reverse voltage

・ Excessive mechanical stress

・ Applying rush current by sudden charge or discharge out of the specification.

(1) The following phenomenon is seen when short-current is applied to the OS-CON.

(a) When current is relatively low. (ø10 : approx 1 A or less, ø8 : approx 0.5 A or less, ø6.3 : approx 0.2 A or less)

The OS-CON becomes heated, but no effects are visible even when the current is continously carried.

(b) When the short circuit currents exceed the mentioned value above.

After internal temperature increase, sealing rubber may be turned over.

In some cases, odorous gas may be produced.

(2) In case a short circuit occurs, ensure safety by fully considering the followings.

(a) If odorous gas is released, turn off the main power of the equipment.

In this case, keep your face and hands away from the area.

(b) It may take a few seconds to a few minutes for odor gas to be generated depending on the conditions.

When using a protective circuit, design the product so that it operates during this period.

(c) If the gas comes into eyes, rinse immediately. If the gas is inhaled, gargle immediately.

(d) Do not lick the electrolyte. If the electrolyte touches skin, wash it off with soap immediately.

(e) OS-CON contains combustibles. The short-circuit part may spark and catch fire if the current value after a

short-circuit is extremely large. Provide for safety designs such as redundant design and protection circuit.

1.2-2 Wear-out failure (life time)

When lifetime span exceeded the specified guarantee time of endurance and damp heat, electrolyte might insulate

and cause electric characteristic changed. This is called an open circuit.

The electric characteristics of capacitance and ESR may possibly change within the specified range in specifications

even if it is used under the condition of the rated voltage, electric and mechanical performance.

Please note it when designing.

1.3 Leakage current

Mechanical stress may cause OS-CON’s leakage current increased.

In such a case, leakage current will gradually decrease by applying voltage (withinthe category voltage and the upper

limit of category temperature).

1.4 Rapid charge and discharge limitation

Allowance of a large rush current to flow due to rapid charge and discharge may result in short circuit or large leakage

current. The protection circuit, to maintain high reliability, is recommended when rush current to flow to the OS-CON

is in the following cases.

(1) Products which 10 times of allowable ripple current is less than 10 A : It is when 10 A or over of rush current is

applied.

(2) Products which 10 times of allowable ripple current is 10 A or over : It is when rush current, which the figure is over

10 times of allowable ripple current, is applied.

05-Mar-21

　　Application Guidelines (OS-CON)

1. Circuit design