Bussmann FRN-R 60A Time-Delay Cartridge Fuse – 250V AC / 125V DC, Class RK5 Motor Protection, Pack of 2

Overview

The Bussmann FRN-R 60 Amp fuse is a heavy‑duty time‑delay cartridge fuse designed to guard motors and main panels in demanding electrical environments. Its dual‑element design combines fast short‑circuit response with a forgiving time‑delay that accommodates normal motor startup surges, helping to prevent burnout during longer overloads. Designed for durability, this fuse delivers reliable protection without sacrificing operational flexibility.

Why choose FRN-R for motor protection

• Heavy‑duty time‑delay and dual‑element construction provide robust short‑circuit and overload protection
• The time‑delay capability supports momentary motor overloads and startup surges, while still interrupting faults quickly
• Rated for 250 VAC and 125 VDC use, with interrupting ratings tuned for demanding circuits
• UL Listed Class R with high interrupting ratings for safe, reliable protection in complex panels
• End cap grooves or knife blade notches enable compatibility with Class H, K or R fuse blocks
• Optional open fuse indication is available on select ratings for quick status checks

Typical applications

Ideal for motor protection in commercial, industrial, and agricultural settings, including HVAC, pumps, conveyors, and other machinery control panels. It is well suited for circuits that may experience surge currents up to several times the amp rating for brief periods, helping to maintain power continuity when possible.

How it works

The FRN-R design employs dual elements to balance fast fault detection with tolerance for temporary overloads. In a genuine fault, the fuse can shut off in a fraction of a second, while during normal startup or short surges it remains conductive long enough to prevent nuisance interruptions. The 60 A rating is paired with a 250 VAC/125 VDC operating range and high interrupting ratings to support safe commissioning and operation of protected equipment.

Practical tips for use

• Use for motor circuits that require protection against single phasing and overloads
• Opt for selective coordination to minimize outages in larger systems
• Install in compatible fuse blocks using the groove or notch end caps

Key specifications at a glance

60 Amp rating; 250 VAC with 125 VDC capability. UL Listed Class R. Interrupting rating: 200 kA at 250 VAC and 20 kA at 125 VDC. Retail pack includes 2 fuses.