The Bussmann Fusetron FRN-R is a Class RK5 dual-element, time-delay cartridge fuse with a built-in open-fuse indicator. The time-delay design rides through the temporary inrush of motor starting and other inductive loads without nuisance opening, while still delivering dependable overload and short-circuit protection. The indicator window shows at a glance when the fuse has opened, speeding troubleshooting.

• Class RK5 dual-element, time-delay cartridge fuse
• 250 VAC rating
• Open-fuse indicator shows when blown
• Time-delay rides through motor and inductive inrush without nuisance trips
• Brass cartridge end caps for low-resistance, reliable contact
• Ideal for motor branch circuits, HVAC, and general-purpose protection
• Sold 2 per blister card
• Size: 50 Amp