Eaton FRN-R-2-1/4 Fuse RK5 Time-Delay, CE Marked
Part Number: FRN-R-2-1/4
Quick Summary
The Eaton FRN-R-2-1/4 fuse provides time-delay protection for control panels and motor circuits. Engineers often struggle with nuisance trips during motor start-up and inrush events, especially in compact enclosures. CE Marked compliance and Class RK5 designation help ensure regulatory alignment and predictable replacement cycles, while its dual-element design quickly limits fault currents. With a 2.25 A rating and high interrupt capability, this fuse supports reliable protection without sacrificing operation. The ferrule-end connection and compact 2 in length streamline installation in standard RK5 holders, delivering value through reduced downtime and easier stocking for maintenance teams and procurement.
Product Information
Extended Description
FRN-R-2-1/4 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 2.25 A, non-indicating fuse, interrupting rating of 200 kA at 250 Vac and 20 kA at 125 Vdc
Product Name
Eaton Bussmann series FRN-R fuse
Catalog Number
FRN-R-2-1/4
UPC
051712507158
EAN
5027590426152
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.04 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
2.25 A
Interrupt rating
20 kAIC at 125 Vdc 200 kAIC at 250 Vac
Response time
8 sec at 500%
Voltage rating
250 Vac, 125 Vdc
Number of elements
Dual
Packaging type
Standard
Class
Class RK5
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Fusetron FRN-R RK5 fuse data sheet for up to 60 amps No. 1019
Time-delay, dual-element protection is designed to tolerate short inrush surges common in motor starters, while still interrupting a fault current quickly. This combination reduces nuisance trips, minimizes mechanical wear, and preserves uptime in applications with rapid startup cycles. It is ideal for control panels, servo drives, and small motor circuits where dependable protection is essential. Class RK5 designation ensures compatibility with Bussmann RK5 fuse holders nationwide, which simplifies stocking and lifecycle management. The ferrule-end x ferrule-end connection provides a robust, vibration-resistant interface that simplifies installation and replacement in harsh industrial environments. In panel builds, that translates to faster commissioning and fewer field install errors. With 200 kAIC at 250 Vac and 20 kAIC at 125 Vdc, the device protects feeders and downstream equipment while maintaining clearance for future expansion. The 2.25 A rating suits compact control circuits, and the 8 sec at 500% response characterizes timing behavior for coordinated protection. The two-inch length and 0.56 inch profile fit tight spaces, and the non-indicating design keeps panels uncluttered. For maintenance, a clean, consistent RK5 form factor reduces stocking complexity and accelerates replacements. CE marking supports European deployments, while standard RK5 compatibility facilitates cross-vendor interchange.
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FAQs
FRN-R-2-1/4 uses ferrule-end x ferrule-end connections and is designed for Class RK5 fuse holders within the Bussmann RK5 family. This facilitates quick field replacement, minimizes adaptor requirements, and ensures reliable interface in standard control panels. When selecting a holder, verify RK5 compatibility and ensure the enclosure accommodates a 2 in length with a 0.56 in cross-section to maintain adequate clearance.
The time-delay dual-element design tolerates initial inrush while still interrupting fault currents. This reduces nuisance trips during motor start-up and allows for selective coordination with upstream protections. In typical applications like motor starters and drives, you can expect improved uptime and longer equipment life due to controlled fault response and reduced wear on contactors.
Yes. The FRN-R-2-1/4 is rated for 250 Vac and 125 Vdc, with an interrupt rating of 200 kAIC at 250 Vac and 20 kAIC at 125 Vdc. Its 2.25 A amperage rating and 2 in length suit compact control panels and small motor circuits, ensuring reliable protection without unnecessary crowding in enclosures.
The FRN-R-2-1/4 is CE Marked, indicating European compliance for electrical safety and performance. It belongs to the Class RK5 fuse family, providing standardized interchangeability with RK5 holders. While listed data highlights CE conformity, always verify current certifications on Eaton’s official datasheets for field deployments and regulator-specific requirements.
Using FRN-R-2-1/4 supports uptime through reliable protection and predictable replacement cycles within the RK5 ecosystem. Its compact Ferrule-end design reduces installation time, while a standardized form factor simplifies stocking and procurement. Although non-indicating, coupling with periodic testing enables timely fault detection and minimizes unplanned downtime in mission-critical control cabinets.