ITEM:
Bussmann Fusetron FRN-45 Fuses (Box of 10) New Old Stock– Old-Era Class K9 (Modern RK5 Equivalent)

DETAILS:
• Model: FRN-45
• Original Classification: Class K9
• Modern Equivalent: Class RK5
• Fuse Type: Time-Delay / Dual-Element
• Type: Cartridge Fuse
• Rating: 45A • 250V
• Current-Limiting Design
• Branding: Box marked "Buss Fuse"; fuse labels marked "Fusetron" (correct for this Bussmann era)

APPLICATIONS:
Motor circuits, HVAC compressors, pumps, industrial machinery, control panels, disconnects, branch-circuit protection, inductive loads, and general-purpose industrial/commercial electrical systems.

NOTES:
Old-stock fuses purchased from the remaining inventory of a long-running electrician / TV-radio repair shop. These are pre-FRN-R units and do not have the rejection notch. Fully compatible with circuits using RK5 characteristics where rejection feature is not required.

Guaranteed they work for 14 days!