\documentclass[landscape,12pt]{article}
%
%
\usepackage{siunitx}
\sisetup{per-mode=fraction}
%
\usepackage{pgfplots}
\pgfplotsset{compat=1.15}
%
\usepackage{mathrsfs}
%
\usepackage{tikz}
\usepackage[european, straightvoltages, americaninductors, siunitx]{circuitikz}
%
\ctikzset{logic ports=european, tripoles/european not symbol=ieee circle}
\usetikzlibrary{arrows}
%
\pagestyle{empty}
\begin{document}
	
\begin{circuitikz}
	
	\draw (0,0) coordinate(Ue);
	\draw (Ue) ++ (2,0) coordinate(L11);
	\draw (L11) -- ++ (3,0) coordinate(C11);
	\draw (C11) -- ++ (2,0) coordinate(R11);
	\draw (R11) ++ (0,-3) coordinate(R12);
	\draw (R12) -- ++ (-2,0) coordinate(C12);
	\draw (C12) -- ++ (-3,0) coordinate(L12);
	\draw (L12) -- ++ (-2,0) coordinate(GND);
	
	\draw (Ue) to[open, v = \SI{\sim230}{\volt}, o-o] (GND);
	\draw (C11) to[C, l = \SI{20}{\micro\farad}, i = \SI{1.45}{\ampere}, *-*] (C12);
	\draw (R11) to[R, l = \SI{100}{\ohm}] (R12);
	
	\draw (Ue) to[short, i = \SI{2.72}{\ampere}] (C11);
	\draw (C11) to[short, i = \SI{2,3}{\ampere}] (R11);
	
	%% Beschriftungen
	
	\draw (C11) ++ (-0.7, 0.7) coordinate(edge1);
	\draw (R12) ++ (1.7, -0.7) coordinate(edge2);
	\draw (R12) ++ (-0.7,-0.3) coordinate(text1);
	
	\draw[red, thick] (edge1) rectangle (edge2) ;
	\draw[red, thick] (text1) node[]{Gerät};
	
\end{circuitikz}
	
\end{document}