Frn-r Series Bp/frn-r-50 Fuse, 50 A, 250 Vac, 125 Vdc, 20, 200 Ka Interrupt, Fiberglass Body, Rk5

The Bussmann BP/FRN-R-50 is a dual-element time delay cartridge fuse designed to protect motors, transformers, and other equipment from damage caused by overloads, ground faults, and short circuits. This 50-amp, 250-volt fuse combines overload protection with rapid short-circuit response, making it ideal for circuits subject to temporary motor surge currents and inrush conditions that would otherwise cause nuisance trips.

The time delay design allows the initial startup surge current typical of motors to pass safely, while the dual-element construction opens quickly—in as little as 0.004 seconds—when dangerous short circuit conditions occur. This selective coordination helps prevent motor burnout from extended overloads or single phasing on three-phase systems, while simplifying electrical system blackout prevention and improving overall circuit reliability.

Features and Benefits

• Dual-Element Design: Provides both overload protection for extended current conditions and rapid short-circuit protection, with opening times as fast as 0.004 seconds under fault conditions.
• Time Delay Performance: Holds inrush current up to 5 times the amp rating for a minimum of 8 seconds, allowing motor startup surges without unwanted interruptions.
• Class RK5 Rating: 200 kA interrupting rating suitable for a broad range of industrial and commercial applications.
• Motor and Transformer Protection: Closer sizing to load allows excellent protection of motors and transformers while helping prevent burnout from overloads and single phasing.
• UL Listed: All fuses meet UL listed Class R standards with fiberglass body construction for durability.
• Convenient 2-Pack: Comes carded for easy storage and ready-to-install replacement.

Specifications

• Brand: Bussmann
• Model: BP/FRN-R-50
• Amperage: 50A
• Voltage: 250 VAC / 125 VDC
• Interrupt Rating: 200 kA
• Class: RK5 (Class R)
• Type: FRN-R Cartridge Fuse, Time Delay, Dual-Element
• Body Material: Fiberglass
• Dimensions: 2.375" L × 1.375" W × 0.50" H
• Count: 2-Pack, Carded

Descriptions are AI-generated. For accurate measurements, please call the store to confirm.