The SG100 from Ametherm is a Ceramic Metal Oxide Negative Temperature Coefficient Thermistor that has been designed to provide in-rush current limit and sensing functions for electronic devices. It has a current rating (RMS) of up to 20 A and a resistance of 1 Ω. This UL 1434-certified in-rush current limiter offers high current handling capability and reduces noise and the risk of fuse failures. It lowers rectifier cost by reducing the required peak forward surge current rating. This RoHS-compliant current limiter is available in a through-hole package that measures 0.9 x 0.3 x 0.04 inches and is ideal for in-rush protection of the AC current in switching power supplies (SPS) applications.