A voltage supressor like the transorb diode is frequently used in circuits complementing gas filled surge arrester. Following is an improvised symbol version using Circuitikz. The problem is that a symmetric symbol in a path requires some further tweaking!
\begin{circuitikz}
\draw (0,0) coordinate(A) to[zzD,fill=white,*-*] (2,0)coordinate(B) to[D, fill=white] ($(B)!0.65!(A)$) ;
\end{circuitikz}