GCM32ER71C226KE19L Datasheet, PDF (49/67 Pages) Murata Manufacturing Co., Ltd. – chip monolithic ceramic capacitors for automotive

!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.
C03E.pdf
May.17,2013
Continued from the preceding page.
4. Type of Applied Voltage and Self-heating Temperature
1. Confirm the operating conditions to make sure that no large
current is flowing into the capacitor due to the continuous
application of an AC voltage or pulse voltage.
When a DC rated voltage product is used in an AC voltage
circuit or a pulse voltage circuit, the AC current or pulse
current will flow into the capacitor; therefore check the
self-heating condition.
Please confirm the surface temperature of the capacitor so
that the temperature remains within the upper limits of the
operating temperature, including the rise in temperature due
to self-heating. When the capacitor is used with a
high-frequency voltage or pulse voltage, heat may be
generated by dielectric loss.
<Applicable to Rated Voltage of less than 100VDC>
1-1. The load should be contained to the level such that
when measuring at atmospheric temperature of 25°C,
the product's self-heating remains below 20°C and the
surface temperature of the capacitor in the actual circuit
remains within the maximum operating temperature.
<Applicable to Temperature Characteristic X7R, X7T
beyond Rated Voltage of 250VDC>
1-2. The load should be contained so that the self-heating of
the capacitor body remains below 20°C, when
measuring at an ambient temperature of 25°C. In
addition, use a K thermocouple of ø0.1mm with less
heat capacity when measuring, and measure in a
condition where there is no effect from the radiant heat
of other components or air flow caused by convection.
Excessive generation of heat may cause deterioration
of the characteristics and reliability of the capacitor.
(Absolutely do not perform measurements while the
cooling fan is operating, as an accurate measurement
may not be performed.)
<Applicable to Temperature Characteristic U2J beyond
Rated Voltage of 250VDC>
1-3. Since the self-heating is low in the low loss series, the
allowable power becomes extremely high compared to
the common X7R characteristics.
However, when a load with self-heating of 20°C is
applied at the rated voltage, the allowable power may
be exceeded. When the capacitor is used in a
high-frequency voltage circuit of 1kHz or more, the
frequency of the applied voltage should be less than
500kHz sine wave (less than 100kHz for a product with
rated voltage of DC3.15kV), to limit the voltage load so
that the load remains within the derating shown in the
following figure. In the case of non-sine wave,
high-frequency components exceeding the fundamental
frequency may be included. In such a case, please
contact Murata. The excessive generation of heat may
cause deterioration of the characteristics and reliability
of the capacitor.
(Absolutely do not perform measurements while the
cooling fan is operating, as an accurate measurement
may not be performed.)
!Caution
[Example of Temperature Rise (Heat Generation)
in Chip Monolithic Ceramic Capacitors in Contrast
to Ripple Current]
Sample: R characteristics 10μF, Rated voltage: DC10V
Ripple Current
100
10
100kHz
500kHz
1MHz
1
0
1
2
3
4
5
6
Current (Ar.m.s.)
The temperature of the surface
of capacitor: 125°C or less (including self-heating)
U2J char., Rated Voltage: DC250V
1000
(250)
100
to 2,200pF
4,700pF
10,000pF
10
1
10
100
1000
Frequency [kHz]
U2J char., Rated Voltage: DC630V
1000
to 680pF
1,000pF
2,200pF
4,700pF
100
10,000pF
22,000pF
47,000pF
10
1
10
100
1000
Frequency [kHz]
U2J char., Rated Voltage: DC1kV
10000
1000
100
to 470pF
1,000pF
2,200pF
4,700pF
10,000pF
10
1
10
100
1000
Frequency [kHz]
Sine-wave frequency VS allowable voltage
Continued on the following page.
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