Reference only

EGD08E

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CAUTION

1. OPERATING VOLTAGE

When DC-rated capacitors are to be used in AC or ripple current circuits, be sure to maintain the

Vp-p value of the applied voltage or the Vo-p which contains DC bias within the rated voltage range.

When the voltage is started to apply to the circuit or it is stopped applying, the irregular voltage may

be generated for a transit period because of resonance or switching. Be sure to use a capacitor

within rated voltage containing these irregular voltage.

Voltage

DC Voltage

DC+AC Voltage

AC Voltage

Pulse

Voltage(1)

Pulse

Voltage(2)

Positional

Measurement

2. OPERATING TEMPERATURE AND SELF-GENERATED HEAT

Keep the surface temperature of a capacitor below the upper limit of its rated operating temperature

range. Be sure to take into account the heat generated by the capacitor itself.

When the capacitor is used in a high-frequency current, pulse current or the like, it may have the self-

generated heat due to dielectric-loss. Applied voltage should be the load such as self-generated

heat is within 20

°C on the condition of atmosphere temperature 25 °C. When measuring, use a

thermocouple of small thermal capacity-K of

φ0.1mm and be in the condition where capacitor is not

affected by radiant heat of other components and wind of surroundings. Excessive heat may lead to

deterioration of the capacitor’s characteristics and reliability.(Never attempt to perform measurement

with the cooling fan running. Otherwise, accurate measurement cannot be ensured.)

3. TEST CONDITION FOR WITHSTANDING VOLTAGE

(1) TEST EQUIPMENT

Test equipment for AC withstanding voltage should be used with the performance of the wave similar

to 50/60 Hz sine wave.

If the distorted sine wave or over load exceeding the specified voltage value is applied, the defective

may be caused.

(2) VOLTAGE APPLIED METHOD

When the withstanding voltage is applied, capacitor’s lead or terminal should be firmly connected

to the out-put of the withstanding voltage test equipment, and then the voltage should be raised

from near zero to the test voltage.

If the test voltage without the raise from near zero voltage would be applied directly to capacitor, test

voltage should be applied with the *zero cross. At the end of the test time, the test voltage should be

reduced to near zero, and then capacitor’s lead or terminal should be taken off the out-put of the

withstanding voltage test equipment.

If the test voltage without the raise from near zero voltage would

be applied directly to capacitor, the surge voltage may arise,

and therefore, the defective may be caused.

*ZERO CROSS is the point where voltage sine wave pass 0V.

- See the right figure -

4. FAIL-SAFE

When capacitor would be broken, failure may result in a short circuit. Be sure to provide an

appropriate fail-safe function like a fuse on your product if failure would follow an electric shock,

fire or fume.

5. VIBRATION AND IMPACT

Do not expose a capacitor or its leads to excessive shock or vibration during use.

0V

voltage sine wave

zero cross

Vp-p

Vp-p

Vp-p

Vo-p

Vo-p