The Bussmann FRN‑R‑15 is a high‑performance dual‑element, time‑delay, current‑limiting fuse engineered for industrial and commercial electrical systems requiring dependable overload and short‑circuit protection. Part of the renowned Fusetron FRN‑R Series, this Class RK5 fuse is designed to handle temporary motor inrush, transformer energizing, and momentary overload conditions without nuisance opening.

With an exceptional interrupting rating of 200 kA at 250 VAC, the FRN‑R‑15 is suitable for demanding applications such as motor control centers, combination starters, machinery disconnects, and power panelboards. Its dual‑element design provides advanced overload protection not possible with standard one‑time or fast‑acting fuses.

Key Features

• Dual‑element time‑delay performance—withstands temporary motor overloads and high inrush currents.
• Time‑delay rating: 8 seconds minimum at 500% of rated current for 1/10–30A sizes, including 15A.
• Current‑limiting Class RK5 fuse significantly reduces fault energy for enhanced component protection.
• Non‑indicating (no blown‑fuse indicator window).
• Ferrule end × ferrule end terminal configuration for standard RK5 fuse holders.
• UL Listed, CSA Certified, and CE compliant for broad industrial acceptance.
• Energy‑efficient Fusetron construction for cooler operation and long service life.

Specifications

• Catalog Number: FRN‑R‑15 
• Amp Rating: 15A
• Voltage Ratings:
  • 250 VAC
  • 125 VDC
• Interrupting Ratings:
  • 200 kAIC @ 250 VAC
  • 20 kAIC @ 125 VDC
• Fuse Class: RK5
• Response Time: 8 seconds at 500% overload
• Construction:
  • Fiberglass cylindrical body
  • Ferrule terminals
• Dimensions:
  • Length: 2 in
  • Diameter: 0.56 in
• Mounting: Clip/holder mount

Applications

The FRN‑R‑15 is ideal for circuits that experience inrush currents or require high‑performance overload protection:

• Combination starters
• Motor control centers (MCCs)
• Machinery disconnects and industrial equipment
• Power panelboards
• HVAC and pump systems
• Lighting and feeder circuits requiring time‑delay behavior