Reply To: what is the factor of b in shockley diode equation May 1, 2021 at 1:16 am #5675 MichalKeymasterThe assignment of B to a physical entity is done with the Boltzmann factor, where E is replaced by the voltage B: B = qV/kT, where k = 8.61758 x 105 eV/K. Then, kT/q is called the thermal voltage Vth and is 25.8 mV at 300K