Eaton FRN-R-1-1/4 Fuse - RK5 Class, 200 kAIC
Part Number: FRN-R-1-1/4
Quick Summary
FRN-R-1-1/4 is a time-delay fuse for protecting control panels and motor circuits in automation environments. This design helps prevent nuisance outages from short surges while preserving selective coordination across protection schemes. The FRN-R RK5 family carries CE Marking and Class RK5 safety alignment, delivering reliable current-limiting performance in harsh industrial settings. With a 1.25 A rating and 200 kAIC interrupt capacity at 250 Vac, the dual-element fuse offers predictable replacement cycles, a compact footprint, and easy ferrule-end installation—supporting uptime, regulatory compliance, and total-cost-of-ownership goals.
Product Information
Extended Description
FRN-R-1-1/4 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 1.25 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-1-1/4
UPC
051712507103
EAN
5027590426046
Product Length/Depth
0.56 in
Product Height
2 in
Product Width
0.56 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
1.25 A
Interrupt rating
200 kAIC at 250 Vac 20 kAIC at 125 Vdc
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 design provides selective protection for inrush-heavy loads, reducing downtime and extending equipment life in motors, drives, and control panels. This current-limiting fuse interrupts fault currents efficiently (200 kAIC at 250 Vac) while tolerating brief overloads, improving uptime in automated lines and minimizing nuisance trips during startup or transient surges. The compact 0.56 in by 0.56 in footprint and 2 in height fit standard RK5 fuse blocks, enabling straightforward retrofits and scalable protection across multiple control circuits. Ferrule-end connections simplify installation and ensure robust, vibration-resistant contact in harsh industrial environments. The non-indicating design reduces panel clutter, while CE marking confirms regulatory alignment for European operations. Overall, FRN-R-1-1/4 delivers reliable protection with predictable replacement cycles and low lifecycle cost.
Get a Quick Quote for a Eaton FRN-R-1-1/4
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton FRN-R-1-1/4?
Enquire Now
FAQs
Verify that the panel accepts ferrule-end fuses in an RK5 fuse block and that your circuit requires a 1.25 A, time-delay device. The FRN-R-1-1/4 uses ferrule-end x ferrule-end connections and a compact 0.56 in by 0.56 in cross-section, which aligns with standard Bussmann RK5 holders. Confirm the mounting footprint, header spacing, and panel cavity clearance to ensure reliable installation and maintenance access.
The FRN-R-1-1/4 is a dual-element, time-delay fuse with current-limiting capability. This combination tolerates brief inrush currents without nuisance trips while preserving fast fault interruption (200 kAIC at 250 Vac). It’s ideal for motor starters and automated controllers where transient surges are common, delivering consistent protection without compromising startup sequences.
Best suited for control panels, power feeders, and motor control circuits in automation environments, the FRN-R-1-1/4 supports protection in both AC and DC portions of the system (250 Vac / 125 Vdc). Its RK5 class construction and ferrule-end connections make it a robust, plug-and-play choice for standard RK5 fuse blocks in machine rooms and panel assemblies.
This fuse is CE Marked, aligning with European safety and environmental requirements. It belongs to the Class RK5 family, a widely adopted standard for protection fuses in industrial equipment. The device is designed for reliable operation within CE-compliant electrical installations and supports compliant panel design and maintenance practices.
The FRN-R-1-1/4 reduces downtime through reliable time-delay protection and high interrupt capacity, lowering repair time after faults. Its compact form and non-indicating design simplify inventory and replacement in crowded panels. With a 1.25 A rating and robust protection against short circuits, operators benefit from longer mean time between failures and lower total cost of ownership in automated facilities.