DHR4E4A221K2BB Ver la hoja de datos (PDF) - Unspecified

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DHR4E4A221K2BB

HIGH VOLTAGE CERAMIC CAPACITORS

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C41E2.pdf 03.4.16

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DHS Series !Caution and Notice

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 applied to

the circuit, starting or stopping may generate irregular

voltage for a transit period because of resonance or

switching. Be sure to use a capacitor with a rated voltage

range that includes these irregular voltages.

3

3

Voltage

DC Voltage

DC+AC Voltage

AC Voltage

Pulse Voltage (1)

Pulse Voltage (2)

Positional

Measurement Vo-p

Vo-p

Vp-p

Vp-p

Vp-p

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 similar current, it may self-generate heat

due to dielectric loss. The applied voltage load should be

such that the capacitor's self-generated heat is within

10°C at an atmosphere temperature of 25°C.

When measuring, use a thermocouple of small thermal

capacity-K of ø0.1mm in conditions where the capacitor

is not affected by radiant heat from other components or

surrounding ambient fluctuations.

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. Installation

Installation torque should not exceed the torque strength

values in "Specifications and Test Methods".

Do not use a screw with a thread depth greater than

specified.

Avoid installation in which any bending torque is applied

to the capacitor terminal.

Do not rework or resolder the terminal.

4. Operating and storage environment

The insulating coating of capacitors does not form a

perfect seal; therefore, do not use or store capacitors in a

corrosive atmosphere, especially where chloride gas,

sulfide gas, acid, alkali, salt or the like are present. And

avoid exposure to moisture.

Before cleaning, bonding, or molding this product, verify

that these processes do not affect product quality by

testing the performance of a cleaned, bonded or molded

product in the intended equipment.

Store the capacitors where the temperature and relative

humidity do not exceed –10 to 40°C and 15 to 85%. Use

capacitors within 6 months.

5. Vibration and impact

Do not expose a capacitor to excessive shock or vibration

during use.

Failure to follow the above cautions may result, worst

case, in a short circuit and cause fuming or partial

dispersion when the product is used.

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