The exact distributed steady-state equivalent circuit model is used to calculate the forward current-voltage characteristics of zinc-doped p-n junction diodes. The experimental values of the Shockley-Read-Hall (SRH) coefficients at zinc centers in silicon and measured recombination center (zinc) density were used in the model. The theoretical forward <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I-V</tex> characteristics are compared with experimental <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I-V</tex> over a wide range of temperatures, showing excellent agreement.