GR442QR7LB102KW01L Datasheet, PDF (139/237 Pages) Murata Manufacturing Co., Ltd. – chip monolithic ceramic capacitors

!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.
C02E.pdf
Oct.1,2012
Continued from the preceding page.
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 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.
2. The capacitance values of high dielectric constant type
capacitors change depending on the AC voltage applied.
Please consider the AC voltage characteristics when
selecting a capacitor to be used in an AC circuit.
!Caution
[DC Voltage Characteristics]
20
0
-20
-40
-60
-80
-100
0
1
2
3
4
5
6
7
DC Voltage (VDC)
[AC Voltage Characteristics]
30
20
10
0
-10
-20
-30
-40
-50
-60
0.0
0.5
1.0
1.5
2.0
2.5
AC Voltage (Vr.m.s.)
6. Capacitance Aging
1. The high dielectric constant type capacitors have the
characteristic in which the capacitance value decreases
with the passage of time.
When you use a 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.
20
10
0
-10
-20
-30
-40
10
100
1000
Time (Hr)
5C
RΔ
10000
Continued on the following page.
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