Bussmann FRN-R-80 Fusetron Slow-Blow Time Delay Fuse

Bussmann FRN-R-80 Fusetron Slow-Blow Time Delay Fuse is an 80 A, 250 VAC Class RK5 fuse from Eaton’s Bussmann FRN-R family, built to protect branch circuits with the reliability of a current-limiting, dual‑element design. Its time‑delay (slow‑blow) characteristics let brief overloads—such as motor starts or transformer inrush—pass without nuisance trips, while its fast interrupting action clears faults promptly, supported by a 200 kA interrupting rating at 250 VAC. This non‑indicating cartridge uses blade‑end terminals for straightforward installation in compatible RK5 holders and panelboards, offering a compact, replaceable protection device in a wide range of commercial and industrial applications. Typical uses include protecting motors, transformers, power supplies, and other inductive loads in motor control centers, switchgear, and distribution panels, where dependable overcurrent protection and quick fault clearance are essential.