Fusetron FRS-R-1 is a type of fuse manufactured by the company Fusetron. It is a current-limiting, time-delay fuse designed for use in electrical systems to protect against overcurrents. The “R-1” designation indicates that it is rated for a current of 1 amp. The Fusetron brand is known for its high-quality fuses and is used in a wide range of applications, including residential, commercial, and industrial settings