The Input Stage Components for DC-DC Designs form is displayed for High Voltage and Low Voltage DC inputs.
In this design form you can check and edit Fuse, CIN and Y-capacitor values:
Fuse - Click the calculator icon 
on the right of the Type box to change the Fuse type. You can select between Fuse and Fusible Resistor. The 
icon indicates that the custom selected value was selected. To restore the default value click the icon.
To change the component, click the black down arrow control on the right of the calculator icon and select Change. The Input Fuse or Fusible Resistor dialog box will be displayed where you can select another fuse or fusible resistor. The icon indicates that the custom selected component is chosen. To restore the default component click the black down arrow control on the right of the icon and click Default.
In case of Low Voltage DC input no fuse or fusible resistor is required, so this part of the Input Stage Components for DC-DC Designs form is grayed out.
Capacitors - To change the component for CIN or Y capacitor in the corresponding row click the black down arrow control on the right of the calculator icon and select Change. The Cin1 bulk capacitor or Y-capacitor dialog box will be displayed where you can select another capacitor. The icon indicates that the custom selected component is chosen. To restore the default component click the black down arrow control on the right of the icon and click Default.
In case of Low Voltage DC input there is no Y-capacitor.