If this capacitor was used as a bypass capacitor with 15V applied, the effective capacitance is not 4.7uF, but only 20% of 4.7uF, or 0.94uF.
See the TDK video link below for the explanation:
Related Links:
Operating Above Resonance - Dr Howard Johnson
EEVblog #626 - Ceramic Capacitor Voltage Dependency - YouTube
EEVblog #626 - Ceramic Capacitor Voltage Dependency - YouTube
That's it !
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