documentclass{article}
usepackage{circuitikz,siunitx}
usetikzlibrary{circuits.logic.IEC}

begin{document}

begin{circuitikz}[circuit logic IEC]

node[
      and gate,
      inputs={nnn},
      and gate IEC symbol={},
      text height=5cm,
      text width=2cm,
     ] (A) {};

 (A.in 1) node [anchor=east] {A}     %not working
 (A.in 2) node [anchor=east] {B}     %not working

end{circuitikz}

end{document}