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If I have a circuit that is designed for a ceramic, SMD, 0402, 1uF, 10%, 10V rated capacitor, and I swap in a ceramic, SMD, 0402, 1uF, 10%, 25V capacitor would anything change in the circuit?

Would the performance of the capacitor change in any significant or measurable way?


marked as duplicate by Lior Bilia, Dmitry Grigoryev, winny, Sparky256, Dave Tweed Sep 9 '18 at 16:02

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With high value ceramics like that, a higher specified voltage will mean a higher capacitance at your operating voltage. That is, the capacitor won't lose as much of its zero volts rated capacitance to voltage coefficient.

In decoupling applications, a little extra capacitance is a good thing. Given the tolerance of these capacitors, it's unlikely the circuit has been designed to rely on a particular reduced value.

  • 2
    \$\begingroup\$ My experience with high value ceramics in small packages has not been as you describe. A higher specified voltage rating does not dictate its capacitance under DC bias. It only dictates the range of safe voltages that can be applied. In many cases, higher-V-rated caps have shown similar or worse Capacitance vs. Voltage performance. I've used the manufacturers' tools (e.g. Murata Simsurfing) to demonstrate this in the past. \$\endgroup\$ – Kevin Kruse Sep 5 '18 at 18:34
  • \$\begingroup\$ Agree with Kevin. It's more of a physical size (including z hight) for a given capacitance and high k material. \$\endgroup\$ – Mike Sep 5 '18 at 18:41

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