Use the Output Snubbers form to review the output snubbers used in the current design. PI Expert selects the output snubbers when optimizing a design and ensures that the output snubbers parameters meet the specification. The main output is marked with the M symbol. By default using the output snubber is turned on. In the Output Snubbers form for each output you can turn using snubber on or off and change the snubber components by accessing the Component library.
RC snubbers are commonly placed across secondary and bias diodes. The primary function of the snubber circuit is to limit the peak voltage at the instant when the diode turns off and to reduce the ringing.
The snubber capacitance should normally be chosen, so that it is much larger than the diode capacitance at the expected peak inverse voltage. The figure below shows how the ringing is decreased with the increased snubber capacitance. Note, however, that larger snubber capacitor is also associated with higher snubber losses. PI Expert selects a capacitor value to balance the losses and to provide significant damping at turn-off.
To change an output snubber:
Select the output for that you want to edit the snubber and click Change to display the Snubber Components dialog box. You can also double-click on the output row.
The Snubber Components dialog box displays and allows you to edit the components of the currently selected snubber. You can also apply or remove the snubber from the output.
Click OK when you are finished. The icon 
indicates that the custom selected snubber is added to the list. Double-click the icon to open Snubber Components dialog box to revise the custom settings or restore the default values.