The Amphenol Advanced Sensors thermometrics CL Series of inrush current limiting thermistors consists of a disc thermistor with uninsulated lead-wires, and are used to control inrush current when switching power supplies. 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.

Low cost, solid state device for inrush current suppression
Excellent mechanical strength
Wide operating temperature range: -58°F to 347°F (-50°C to 175°C)
Suitable for PCB mounting
Low steady resistance and accompanying power loss
Small size
Low cost solid state sensor