The main purpose of limiting inrush current is to prevent components in series with the input to the DC/ DC convertor from being damaged. Typically, inrush protection prevents nuisance blowing of fuses or breakers as well as welding of switch contacts.
UL Approval (UL 1434 File# E82830)
Small physical size offers design-in benefits over larger passive components
Low steady resistance and accompanying power loss
Suitable for PCB mounting
Available with kinked or straight leads and tape and reel to EIS RS-468A for automatic insertion