GRM0332C2A6R9DA01 datasheet(69/89 Pages) MURATA1

69 / 89 page

C02E.pdf

Nov.27,2017

Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.

• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

270

Caution

5. DC Voltage and AC Voltage Characteristics

1. The capacitance value of a high dielectric constant type

capacitor changes depending on the DC voltage applied.

Please consider the DC voltage characteristics when a

capacitor is selected for use in a DC circuit.

1-1. The capacitance of ceramic capacitors may change

sharply depending on the applied voltage (see ﬁgure).

Please conﬁrm the following in order to secure the

capacitance.

(1) Determine whether the capacitance change

caused by the applied voltage is within the

allowed range.

(2) In the DC voltage characteristics, the rate of

capacitance change becomes larger as voltage

increases, even if the applied voltage is below the

rated voltage. When a high dielectric constant

type capacitor is used in a circuit that requires a

tight (narrow) capacitance tolerance (e.g., a time

constant circuit), please carefully consider the

voltage characteristics, and conﬁrm the various

characteristics in the actual operating conditions

of the system.

2. The capacitance values of high dielectric constant type

capacitors changes depending on the AC voltage applied.

Please consider the AC voltage characteristics when

selecting a capacitor to be used in an AC circuit.

-60

-50

-40

-30

-20

-10

0.5

1.5

AC Voltage (Vr.m.s.)

-100

-80

-60

-40

-20

DC Voltage (V)

[Example of DC Voltage Characteristics]

Sample: X7R (R7) Characteristics 0.1µF,

Rated Voltage 50VDC

[Example of AC Voltage Characteristics]

Sample: X7R (R7) Characteristics 10µF,

Rated Voltage 6.3VDC

6. Capacitance Aging

1. The high dielectric constant type capacitors have an

Aging characteristic in which the capacitance value

decreases with the passage of time.

When you use high dielectric constant type capacitors in

a circuit that needs a tight (narrow) capacitance

tolerance (e.g., a time-constant circuit), please carefully

consider the characteristics of these capacitors, such as

their aging, voltage, and temperature characteristics. In

addition, check capacitors using your actual appliances at

the intended environment and operating conditions.

-40

-30

-20

-10

100

1000

10000

Time (h)

[Example of Change Over Time (Aging Characteristics)]

C0G (5C)

X7R (R7)

X5R (R6)

Continued from the preceding page.

Continued on the following page.

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