The 2JS 1-R with Cartridge Fuses, manufactured by Bel Fuse, is a device used to provide circuit protection for electronic components. It is a two-piece device consisting of a holder and a fuse. The holder is rated for 250V, and the insertable fuse is a Type J, 250V, 0.125A size with a 0.2 x 0.4 inch diameter. They are designed to help protect against excessive current, overload, and short-circuit events. The 2JS 1-R with Cartridge Fuses are UL recognized, CSA certified, and RoHS compliant, ensuring safe use of the device. They are also designed for high electrical performance and have a long service life.