Capacitors FAQ

Ceramic Capacitors
Polymer Capacitors
Variable Capacitors
Silicon Capacitors
High Temperature Film Capacitor

Ceramic Capacitors

Q What is the allowable Ripple current Murata's ceramic capacitors can withstand?
Q Can I use Murata capacitors in a AC circuit?
Q What is the units of insulation resistance for ceramic capacitors?
Q Does the capacitance change when a DC voltage is applied to ceramic capacitors? Are there any points to be aware of regarding changes in the capacitance?
Q Please tell us whether the capacitance of the ceramic capacitors changes with time. Also, please tell us about any points to pay attention to regarding time-dependent changes.
Q What is the reason that the nominal capacitance value cannot be obtained?
Q Is it safe to use multilayer ceramic capacitors in excess of the rated voltage condition?
Q What is the difference between the operating temperature range and the applicable temperature range?
Q [Temperature characteristics] What is the difference between Murata part number code 'B1' and 'B3' corresponding to JIS code 'B'?
Q How does the capacity change outside the applicable temperature range and within the operating temperature range for ceramic capacitors with different operating temperature ranges and applicable temperature ranges?
Q What is the mechanism of the changing of the capacitance of ceramic capacitors over time?
Q What are the typical ESR and ESL values of multilayer ceramic capacitors?
Q What is the difference in the features and applications between the high dielectric type (X5R/X6S/X7R etc.) and the temperature compensating type (COG/U2J etc.)?
Q Is a pretreatment required when using a multilayer ceramic capacitor?
Q I would like to use a DC rated product for an AC line; are there any issues in doing this?
Q Why does acoustic noise occur in ceramic capacitors, and does this have any effect on reliability?
Q I am considering connecting capacitors in series. Are there any issues in using them this way?
Q Although the KRM/KCM series which have metal leads are effective for acoustic noise and cracks, doesn't the ESR increase by an amount corresponding to the existence of metal terminals?
How much does ESR get worse as compared with GRM series?
Q What precautions must be observed when using capacitors that have metal terminals?
Q What is the function of a capacitor in a circuit?
Q What is the characteristics of Multilayer Ceramic Capacitors?
Q What kind of Ceramic Capacitors do you have?
Q What is the application of Multilayer Ceramic Capacitors?
Q How do you measure the capacitance of Ceramic Capacitors?
Q Do you have any cautions for measurement of capacitance?
Q [Temperature characteristics] What are the temperature characteristics of a capacitor?
Q What is the voltage characteristic of capacitor's capacitance?
Q What is the frequency characteristic of capacitor's impedance?
Q What is the calorific property and measuring method of capacitors?
Q What is the cause of increase of capacitance when the ceramics become thinner?
Q What are the leakage current specification values for DC?
Q How is the capacitance value of a capacitor obtained?
Q The capacitance-frequency characteristics displayed by SimSurfing differ from the nominal capacitance. What is the reason for this?
Q Are there any problems in performing manual repair or reworking (replacement, removal ⇒ mounting) of multilayer ceramic capacitors mounted on boards? Are there any points to be aware of when performing manual repair or reworking?
Q Which public standards do your chip multilayer ceramic capacitor products comply with?
Q What precautions for insulation resistance must be observed when using capacitors?
Q Please provide data regarding the temperature characteristics and DC bias characteristics, AC voltage characteristics, impedance/ESR and other frequency characteristics, ripple exothermic characteristics and other major electrical characteristics of multilayer ceramic capacitors. In addition, is it possible for such data to be provided in CSV format?
Q Please provide data regarding the DC bias characteristics in the event that the measurement conditions (ambient temperature and the applied voltage of the alternating current) of the multilayer ceramic capacitors are changed. (Ex: DC bias characteristic data at 40℃ and 10 mVrms)
Q Please provide data regarding the temperature characteristics in the event that the measurement conditions (applied voltage of the direct/alternating current) of the multilayer ceramic capacitors are changed. (Ex: Temperature characteristic data at 3VDC and 10 mVrms)
Q Please provide data regarding the frequency characteristics in the event that the measurement conditions (ambient temperature and the applied voltage of the direct current) of the multilayer ceramic capacitors are changed. (Ex: Frequency characteristic data at 40℃ and 3VDC)
Q Please provide a data sheet regarding the electrical characteristics of the multilayer ceramic capacitors. In addition, please provide comparative data for multiple part numbers.
Q What are the units for DF (dissipation factor) values?
Q Is data available for the high-frequency or low-frequency areas that do not appear on the frequency characteristics graphs for ceramic capacitors?
Q Do you have ceramic capacitors that can be substituted for electrolytic capacitors?
Q Are there ceramic capacitors that can be used to replace film capacitors?
Q [Temperature characteristics] What are the differences between the X7R, X7S, and X7T with regard to MLCC temperature characteristics?
Q Are there any resonant capacitors used for automotive OBC/wireless power supply, high power density server power supply, etc.? Also, are there any precautions for use?

Polymer Capacitors

Q Are polymer capacitors compliance product for EU RoHS and halogen-free?

Q Is the ECAS series a multi-layer device?

Variable Capacitors

Q ESD Resistance

Q How to make a spice model

Silicon Capacitors

High Temperature Film Capacitor

Q What are the characteristics of the dielectric film of the FH Series?

Q What are the failure modes where overvoltage is applied? Short mode failure or open mode failure?