Bussmann FRN-R-7 Fuse, Glass Fuse, Time Delay, 7 A, 2 in L x 9/16 inch dia Fuse Size

Features

• These 250VAC UL Class RK5 fuses are time-delay and non-indicating. 
• They tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups.
• Also called slow-blow Class RK5 fuses, these 200kA IR fuses open to disconnect an electrical circuit when exposed to sustained loads and short circuits. 
• They have no indicator for identifying a blown fuse, so they're sometimes used with an indicating fuse block or cover.
• UL Class RK5 fuses provide moderate current limitation for general use applications where more current-limiting RK1 fuses aren't needed. 
• These fuses have an interrupting rating (IR) of 200kA and are the same size as Class H and K fuses, but have a rejection feature that prevents an accidental downgrade from a current-limiting system. 
• Their modified terminals ensure a match with the rejection clips in Class R fuse holders that prevent the installation of fuses with a lower interrupting capacity. 
• They're typically used in newer equipment, but can also be used with a Class H fuse holder to upgrade older installations from Class H or K fuses for improved overcurrent protection. 
• They are current-limiting to prevent electrical damage by disconnecting circuits before they're exposed to the full magnitude and duration of an overcurrent.