Key Features

• Dual‑element time‑delay design provides separate overload and short‑circuit protection for optimal system reliability.
• Current‑limiting Class RK5 fuse reduces fault energy and protects downstream components.
• Time‑delay rating: 10‑second minimum at 500% of rated current (for 40A size).
• Ferrule end × ferrule end cartridge configuration for standard RK5 fuse holders.
• Non‑indicating type (no blown‑fuse window).
• Energy‑efficient Fusetron technology—up to 23% more efficient than many competitive designs.
• UL Listed and CSA Certified for wide industry acceptance.

Specifications

• Catalog Number: FRN‑R‑40 (retail pack version: BP/FRN‑R‑40)
• Amp Rating: 40A
• Voltage Ratings:
  • 250 VAC
  • 125 VDC
• Interrupting Ratings:
  • 200 kAIC @ 250 VAC
  • 20 kAIC @ 125 VDC
• Fuse Class: Class RK5
• Response Time:
  • 10 seconds at 500% overload
• Construction: Cylindrical fiberglass body with ferrule terminals
  Dimensions:
  • Length: 3 in
  • Diameter: 0.81 in
• Mounting: Clip/holder mount (RK5 compatible)
• Package Type: Retail blister pack (BP/FRN‑R‑40)

Applications

The FRN‑R‑40 is ideal for time‑delay circuits exposed to temporary surges, including:

• Combination starters
• Motor control centers (MCCs)
• Machinery disconnects & industrial equipment
• Power panelboards
• HVAC systems, pumps, compressors, fans, conveyors
• Heavy inductive loads requiring surge tolerance