RF1946-000 is a fast-acting type semiconductor fuse from Littelfuse. It is a 0.3A/250VAC small-footprint radial fuse designed for use in a variety of applications. It has a 1/4”x 1/2” ceramic body, a 6” lead length, and features a small case size for easy mounting in tight spaces. It is rated for use in 10kA surge and interrput applications, with a 900VAC breaking capacity.