1. Changing Device Parameters in PSpice
Device Model: Diode

2. PSpice
Simplest diode model in PSpice uses only the ideal diode equation
More complex diode models in PSpice include:
Parasitic resistances to account for the linear regions
Breakdown voltage with current multipliers to map the knee between Io and the current at breakdown
Temperature dependences of various parameters
Parasitic capacitances to account for the frequency dependence 2

3. PSpice Device Simulation packages Capture Schematics
The calculations performed will be identical when using the same device models.
The GUIs are not the same.
There are minor differences in how the programs interprets some changes that you make to the device models. 3

4. PSpice Schematics

5. To plot the I-V characteristics of the diode in PSpice, I run a DC sweep on this very simple circuit. 5

8. Device Parameters *** Power Diode *** Type of Diode .MODEL D1N4002-X D
Part Number
( IS=14.11E-9
Reverse Saturation Current
N=1.984
Ideality Factor
RS=33.89E-3
Forward Series Resistance
IKF=94.81
High-Level Injection Knee Current in Forward Bias
XTI=3
Temperature Dependence of Reverse Saturation Current
EG=1.110
Energy Bandgap of Si
CJO=51.17E-12
Junction Capacitance at Zero Applied Bias
M=.2762
Grading Coefficient Inversely Proportional to Zener Resistance
VJ=.3905
Turn-on Voltage
FC=.5
Coefficient Associated with Forward Bias Capacitance
ISR=100.0E-12
Reverse Saturation Current During Reverse Bias
NR=2
Ideality Factor During Reverse Bias
BV=100.1
Breakdown Voltage
IBV=10
Current at Breakdown Voltage
TT=4.761E-6 )
Transit Time of Carriers Across p-n Juntion

9. PSpice Capture

12. Editing Device Model
The device parameters can be changed, but will only be changes for the file that you are currently working on.
In Schematics, the changes only apply to the specific part that you had highlighted when you made the changes.
In Capture, the changes apply to all components in the file that share the same part model.
To simulate the Ideal Diode Equation, you can delete the other parameters or set them to zero or a very large number, depending on what would be appropriate to remove their effect from the simulation