Safety Standard Certified Ceramic Capacitors/High Voltage ... - Murata

!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 specifi cations or transact the approval sheet for product specifi cations before ordering.C85E.pdfApr.7,2014Safety Certified Ceramic Capacitors for Automotive !Cautionc !Caution (Rating)1. Operating VoltageWhen DC-rated capacitors are to be used in AC or ripplecurrent circuits, be sure to maintain the Vp-p value of theapplied voltage or the Vo-p that contains DC bias withinthe rated voltage range.When the voltage is applied to the circuit, starting orstopping may generate irregular voltage for a transitperiod because of resonance or switching. Be sure touse a capacitor with a rated voltage range that includesthese irregular voltages.VoltageDC Voltage DC+AC Voltage AC Voltage Pulse Voltage (1) Pulse Voltage (2)PositionalMeasurementV0-p V0-p Vp-p Vp-p Vp-p2. Operating Temperature and Self-generated HeatKeep the surface temperature of a capacitor below theupper limit of its rated operating temperature range. Besure to take into account the heat generated by thecapacitor itself. When the capacitor is used in a highfrequencycurrent, pulse current or similar current, it mayhave self-generated heat due to dielectric loss. Appliedvoltage load should be such that self-generated heat iswithin 20°C under the condition where the capacitor issubjected to an atmospheric temperature of 25°C. Whenmeasuring, use a thermocouple of small thermalcapacity-K of ø0.1mm under conditions where thecapacitor is not affected by radiant heat from othercomponents or wind from surroundings. Excessive heatmay lead to deterioration of the capacitor's characteristicsand reliability. (Never attempt to perform measurementwith the cooling fan running. Otherwise, accuratemeasurement cannot be ensured.)3. Test Condition for Withstanding Voltage(1) Test EquipmentTest equipment for AC withstanding voltage should beused with the performance of the wave similar to50/60Hz sine wave.If the distorted sine wave or overload exceeding thespecified voltage value is applied, a defect may becaused.Continued on the following page.77