!
Caution
3. Applied Voltage and Applied Current
1. Do not apply a voltage to the capacitor that exceeds the
rated voltage as called out in the specifications.
1-1. Applied voltage between the terminals of a capacitor
shall be less than or equal to the rated voltage.
(1) When AC voltage is superimposed on DC voltage,
the zero-to-peak voltage shall not exceed the
rated DC voltage.
When AC voltage or pulse voltage is applied, the
peak-to-peak voltage shall not exceed the rated
DC voltage.
(2) Abnormal voltages (surge voltage, static
electricity, pulse voltage, etc.) shall not exceed
the rated DC voltage.
1-2. Influence of over voltage
Over voltage that is applied to the capacitor may
result in an electrical short circuit caused by the
breakdown of the internal dielectric layers.
The time duration until breakdown depends on the
applied voltage and the ambient temperature.
2. Use a safety standard certified capacitor in a power
supply input circuit (AC filter), as it is also necessary to
consider the withstand voltage and impulse withstand
voltage defined for each device.
<Applicable to NFM Series>
3. The capacitors also have rated currents.
The current flowing between the terminals of a capacitor
shall be less than or equal to the rated current. Using the
capacitor beyond this range could lead to excessive heat.
Typical Voltage Applied to the DC Capacitor
(E: Maximum possible applied voltage.)
DC Voltage
DC AC
AC Voltage
Pulse Voltage
E
0
E
0
E
0
E
0
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 so that the self-heating of
the capacitor body remains below 20°C, when
measuring at an ambient temperature of 25°C.
1
10
100
0
1
2
3
4
5
6
Current (Ar.m.s.)
[Example of Temperature Rise (Heat Generation)
in Chip Multilayer Ceramic Capacitors in Contrast
to Ripple Current]
Sample: R (R1) characteristics 10μF,
Rated voltage: DC10V
Temperature Rise (
°C)
Ripple Current
100kHz
500kHz
1MHz
Continued from the preceding page.
Continued on the following page.
!
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.
