When DC-rated capacitors are to be used in AC or ripple
current circuits, be sure to maintain the Vp-p value of the
applied voltage or the Vo-p that contains DC bias within
the rated voltage range.
When the voltage is applied to the circuit, starting or
stopping may generate irregular voltage for a transit
period because of resonance or switching. Be sure to use
a capacitor with a rated voltage range that includes these
When using the low-dissipation DEA (SL Char.) /DEC (SL
Char.) /DEH (C, R Char.) /DES (D Char.) series in a high-
frequency and high-voltage circuit, be sure to read the
instructions in item 4.
When DC-rated capacitors are to be used in input circuits
from commercial power source (AC filter), be sure to use
Safety Certified Capacitors because various regulations
on withstand voltage or impulse withstand established for
each type of equipment should be taken into consideration.
Keep the surface temperature of a capacitor below the
upper limit of its rated operating temperature range. Be
sure to take into account the heat generated by the
capacitor itself. When the capacitor is used in a high-
frequency current, pulse current or similar current, it may
self-generate heat due to dielectric loss. The frequency of
the applied sine wave voltage should be less than
300kHz. The applied voltage load (*) should be such that
the capacitor's self-generated heat is within 20
°C in an
atmospheric temperature of 25
°C. When measuring, use
a thermocouple of small thermal capacity-K of ø0.1mm in
conditions where the capacitor is not affected by radiant
heat from other components or surrounding ambient
Excessive heat may lead to deterioration of the
capacitor's characteristics and reliability.
(Never attempt to perform measurement with the cooling
fan running. Otherwise, accurate measurement cannot
*Before using the low-dissipation DEA/DEC (SL Char.)
/DEH/DES series, be sure to read the instructions in
Pulse Voltage (1)
Pulse Voltage (2)
1. Operating Voltage
2. Operating Temperature and Self-generated Heat
When the capacitor is broken, failure may result in a short
circuit. Be sure to provide an appropriate fail-safe
function like a fuse on your product if failure could follow
an electric shock, fire or fume.
Continued on the following page.
s !Caution (Rating)
High Voltage Ceramic Capacitors !Caution
!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 because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.