The BP/FRN‑R‑100 FUSETRON® Time‑Delay Cartridge Fuse from Bussmann Corporation is a high‑capacity overcurrent protection device engineered for industrial and commercial electrical systems requiring reliable performance under heavy load conditions. Designed within the proven FUSETRON® FRN‑R series, this Class RK5 fuse delivers dependable protection for circuits subject to high inrush currents, temporary overloads, and severe fault conditions.

Rated at 100 amps and 250 volts AC, the BP/FRN‑R‑100 features a dual‑element, time‑delay construction that allows brief startup surges—common with motors, transformers, and inductive equipment—without nuisance opening. At the same time, it provides fast‑acting, current‑limiting response to short circuits, helping to reduce let‑through energy and protect downstream components from extensive damage.

The Class RK5 rejection‑type design enhances electrical safety by preventing the installation of lower‑rated or physically incompatible fuses when used with appropriate Class R fuse holders. With its high interrupting rating and rugged cartridge construction, the BP/FRN‑R‑100 is well suited for use in power distribution equipment, industrial control systems, and large motor circuits where dependable fault protection is essential.

Key Features

• Dual‑element, time‑delay cartridge fuse for combined overload and short‑circuit protection
• Withstands high inrush currents associated with motors and transformers
• High current‑limiting capability minimizes damage during fault conditions
• Class RK5 rejection‑type construction helps prevent incorrect fuse substitution
• Supports selective coordination in Class RK5 protection schemes
• Non‑indicating design for standard industrial applications
• Robust construction for demanding commercial and industrial environments

Specifications

• Manufacturer: Bussmann Corporation
• Product Series: FUSETRON® FRN‑R
• Model Number: BP/FRN‑R‑100
• Amperage Rating: 100 A
• Voltage Rating: 250 VAC (125 VDC)
• Fuse Class: Class RK5
• Fuse Type: Cartridge fuse, time‑delay
• Element Type: Dual‑element
• Interrupting Rating:
  • 200 kAIC at 250 VAC
  • 20 kAIC at 125 VDC
• Response Characteristic: Time‑delay operation designed to tolerate temporary overloads
• Indication: Non‑indicating
• Terminal Style: Ferrule end × ferrule end
• Fuse Size: Class RK5 standard cartridge dimensions

Applications

• Large motor branch circuits
• Motor control centers
• Industrial machinery and equipment disconnects
• Power panelboards and switchboards
• Commercial and industrial power distribution systems
• Control panels handling high inrush or fluctuating loads