Bussmann Fusetron FRN-R-2-1/4 Dual-Element Time-Delay Fuse Class RK5 Box of 10

Bussmann Fusetron FRN-R-2-1/4 Dual-Element Time-Delay Fuse Class RK5 (Box of 10)

The Bussmann Fusetron FRN-R-2-1/4 is a dual-element, time-delay fuse designed to provide superior protection for motors and transformers. This Class RK5 fuse is engineered to handle temporary motor overloads and surge currents, ensuring both high-performance short-circuit and overload protection.

Key Features

• Dual-Element Design: Incorporates separate overload and short-circuit elements, allowing for closer sizing to motor full load amperes (FLA) and delivering excellent short-circuit protection. ([eaton.com](https://www.eaton.com/br/en-us/catalog/fuses-and-fuse-holders/bussmann-series-class-rk5-fuses.html?utm_source=openai))
• Time-Delay Performance: Provides a minimum of 10 seconds time-delay at 500% of rated current, accommodating temporary inrush currents without nuisance openings. ([eaton.com](https://www.eaton.com/br/en-us/catalog/fuses-and-fuse-holders/bussmann-series-class-rk5-fuses.html?utm_source=openai))
• Current Limiting: Offers component short-circuit protection by limiting the let-through energy, reducing potential damage to downstream equipment. ([eaton.com](https://www.eaton.com/br/en-us/catalog/fuses-and-fuse-holders/bussmann-series-class-rk5-fuses.html?utm_source=openai))
• Selective Coordination: Maintains a 2:1 amp ratio within the Bussmann series RK5 fuse family, preventing overcurrent events from opening upstream fuses and enhancing system reliability. ([eaton.com](https://www.eaton.com/br/en-us/catalog/fuses-and-fuse-holders/bussmann-series-class-rk5-fuses.html?utm_source=openai))
• Insulated End Caps: For fuses rated 225A-600A, insulated end caps reduce exposure to live parts and extend the air gap between blades of adjacent mounted fuses or to housing, enhancing safety. ([eaton.com](https://www.eaton.com/br/en-us/catalog/fuses-and-fuse-holders/bussmann-series-class-rk5-fuses.html?utm_source=openai))

Specifications

• Voltage Rating: 250V AC / 125V DC
• Amperage Rating: 2-1/4 A
• Interrupting Rating: 200kA RMS Symmetrical at 250V AC; 20kA at 125V DC
• Body Dimensions: 0.56 inches in diameter x 2 inches in length
• Construction: Fiberglass tube with cylindrical body
• Standards Compliance: UL Listed (Guide JDDZ, File E4273), CSA Certified (Class 1422-02, File 53787), CE Marked

Applications

• Power panelboards
• Motor control centers
• Combination starters
• Machinery disconnects

The Bussmann Fusetron FRN-R-2-1/4 fuse is an ideal choice for protecting motors and transformers against overloads and short circuits, ensuring reliable operation in various industrial applications.