The Littelfuse FLSR90 POWR-GARD Class RK-5 Time Delay Dual Element Fuse is a high-quality electrical fuse designed for interior use. Made from copper, this fuse features a time-delay/slow-blow operation method, making it suitable for protecting electrical equipment and systems. With a current-limiting fuse classification and analog/mechanical control style, this fuse is reliable and efficient in controlling the flow of current in a single-phase system. Manufactured in the United States, this unit is designed for any room and offers a horizontal/vertical orientation for easy installation and maintenance.