The STE14D301K1EQ0FST0R0 is a Varistor with 250V/300 (270~330) 500V/4.5KA Through Hole,P=7.5MM RoHS manufactured by Songtian. It is used for surge protection, snubber, transient suppression, and port filtering. It has a built-in ceramic body that provides superior insulation, temperature stability, and noise reduction. Its robust dielectric and high surge specifications makes it ideal for a wide range of applications. It also features low ESR, low ESL, and high power-handling capabilities. The RoHS compliant version is designed to meet environmental protection standards.