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CAUTION
1. OPERATING VOLTAGE
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 which contains DC bias within the rated voltage range. When
the voltage is started to apply to the circuit or it is stopped applying, the irregular voltage may be
generated for a transit period because of resonance or switching. Be sure to use a capacitor within
rated voltage containing these irregular voltage.
When DC-rated capacitors are to be used in input circuits from commercial power source (AC filter),
be sure to use Safety Recognized Capacitors because various regulations on withstand voltage or
impulse withstand established for each equipment should be taken into considerations.
Voltage DC Voltage DC+AC Voltage AC Voltage Pulse Voltage(1) Pulse Voltage(2)
Positional
Measurement
2. OPERATING TEMPERATURE AND SELF-GENERATED HEAT
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 the like, it may have the self-
generated heat due to dielectric-loss. In case of Class 2 capacitors (Temp.Char. : X7R,X7S,X8L, etc.),
applied voltage should be the load such as self-generated heat is within 20 C on the condition of
atmosphere temperature 25 C. Please contact us if self-generated heat is occurred with Class 1
capacitors (Temp.Char. : C0G,U2J,X8G, etc.). When measuring, use a thermocouple of small thermal
capacity-K of 0.1mm and be in the condition where capacitor is not affected by radiant heat of other
components and wind of surroundings. Excessive heat may lead to deterioration of the capacitor’s
characteristics and reliability.
3. Fail-safe
Be sure to provide an appropriate fail-safe function on your product to prevent a second damage that
may be caused by the abnormal function or the failure of our product.
4. OPERATING AND STORAGE ENVIRONMENT
The insulating coating of capacitors does not form a perfect seal; therefore, do not use or store
capacitors in a corrosive atmosphere, especially where chloride gas, sulfide gas, acid, alkali, salt or the
like are present. And avoid exposure to moisture. Before cleaning, bonding, or molding this product,
verify that these processes do not affect product quality by testing the performance of a cleaned, bonded
or molded product in the intended equipment. Store the capacitors where the temperature and relative
humidity do not exceed 5 to 40 C and 20 to 70%. Use capacitors within 6 months.
5. VIBRATION AND IMPACT
Do not expose a capacitor or its leads to excessive shock or vibration during use.
6. SOLDERING
When soldering this product to a PCB/PWB, do not exceed the solder heat resistance specification of
the capacitor. Subjecting this product to excessive heating could melt the internal junction solder and
may result in thermal shocks that can crack the ceramic element.
7. BONDING AND RESIN MOLDING, RESIN COAT
In case of bonding, molding or coating this product, verify that these processes do not affect the quality
of capacitor by testing the performance of a bonded or molded product in the intended equipment.
In case of the amount of applications, dryness / hardening conditions of adhesives and molding resins
containing organic solvents (ethyl acetate, methyl ethyl ketone, toluene, etc.) are unsuitable, the outer
coating resin of a capacitor is damaged by the organic solvents and it may result, worst case, in a short
circuit.
The variation in thickness of adhesive or molding resin may cause a outer coating resin cracking and/or
ceramic element cracking of a capacitor in a temperature cycling.
8. TREATMENT AFTER BONDING AND RESIN MOLDING, RESIN COAT
When the outer coating is hot (over 100 C) after soldering, it becomes soft and fragile.
So please be careful not to give it mechanical stress.
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