Enter the reverse saturation current (amps), the applied voltage (volts), and the Temperature (K) into the calculator to determine the Diode Current. 

Diode Current Formula

The following formula is used to calculate the Diode Current.

Id = Irs * ( e^ (q*V/(k*T)) – 1)

  • Where Id is the Diode Current (amps)
  • Irs is the reverse saturation current (amps) 
  • V is the applied voltage (volts) 
  • T is the Temperature (K) 
  • q is the charge of an electron (1.60217662 *10^-19 C)
  • k is the Boltzmann constant (1.38064852 * 10^-23)

How to Calculate Diode Current?

The following example problems outline how to calculate Diode Current.

Example Problem #1

  1. First, determine the reverse saturation current (amps). In this example, the reverse saturation current (amps) is determined to be 50 .
  2. Next, determine the applied voltage (volts). For this problem, the applied voltage (volts) is measured to be 415 .
  3. Next, determine the Temperature (K). In this case, the Temperature (K) is found to be 40.
  4. Finally, calculate the Diode Current using the formula above: 

Id = Irs * ( e^ (q*V/(k*T)) – 1)

Inserting the values from above and solving yields: 

Id = 50* ( e^(1.60217662 *10^-19*415/(1.38064852 * 10^-23*40)) – 1) = (amps)

Example Problem #2

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

reverse saturation current (amps) = 321

applied voltage (volts) = 96

Temperature (K) = 7

Enter these given values into the calculator or above yields: 

Id = Irs * ( e^ (q*V/(k*T)) – 1) = (amps)