% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{circuitikz}
    \draw(0,0) 
        to [C, o-, l={$C_1$}] ++(2,0) 
        to [C, l={$C_2$}] ++(2,0) 
        to [C, -o, l={$C_3$}] ++(2,0);
\end{circuitikz}