! Caution
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 Temperature Characteristic U2J(7U), C0G(5C)>
1-1. Since the self-heating is low in the low loss series, the allowable power becomes extremely high
compared to the common X7R(R7) 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.)
The surface temperature of the capacitor : 125°C or less
(including self-heating)
2012M/0805(2012M:Metric size code)
C0G(5C) Char. RatedꢀVoltage :ꢀDC200V
C0G(5C) Char. RatedꢀVoltage :ꢀDC250V
1000
100
10
~3900pF
4700pF
6800pF
10000pF
10
100
1000
Frequency [kHz]
3216M/1206(3216M:Metric size code)
C0G(5C) Char. RatedꢀVoltage :ꢀDC250V
Except for 2012M/0805 and 3216M/1206
(2012M,3216M:Metric size code)
C0G(5C) Char. RatedꢀVoltage :ꢀDC250V
Frequency VS Allowable Sine Wave Voltage
JEMCGC-05049F
9
MURATA [ muRata ]
