Eaton FRN-R-4-1/2 Fuse - Class RK5, 4.5A, 200 kAIC at 250 Vac
Part Number: FRN-R-4-1/2
Quick Summary
The Eaton FRN-R fuse is a time-delay, dual-element protection device designed for industrial control panels and power distribution enclosures. It helps prevent nuisance outages by letting harmless surges pass while quickly interrupting severe faults. CE marked and built within the Class RK5 family, it combines reliable protection with standardized replacement options. This fuse is well suited for engineers seeking dependable branch circuit protection with predictable coordination and easy sourcing within the Eaton Bussmann lineup, supporting safer, more efficient panel design and maintenance.
Product Information
Extended Description
FRN-R-4-1/2 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 4.5 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-4-1/2
UPC
051712507219
EAN
5027590426268
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.055 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
4.5A
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
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Fusetron FRN-R RK5 fuse data sheet for up to 60 amps No. 1019
Feature: Time-delay, dual-element protection with current-limiting capability → Business Impact: Reduces nuisance trips during temporary inrush events, preserving uptime and equipment life in fast-moving production lines → Application: Industrial control panels and motor control circuits. Feature: 4.5 A amperage rating with 250 Vac/125 Vdc operation → Business Impact: Matches circuit protection to typical control circuits, minimizing voltage drop and unwarranted fuse swaps → Application: Machine tools and CNC panels. Feature: 200 kAIC at 250 Vac and 20 kAIC at 125 Vdc interrupt rating → Business Impact: Improves surge withstand and safety margins for high-energy faults → Application: Heavy startups and fault-prone power rails. Feature: Ferrule end x ferrule end connections with a compact 2 in length and 0.56 in cross-section → Business Impact: Simple, fast installation in standard RK5 holders, reducing service time → Application: Retrofit in existing RK5 fuse blocks. Feature: Non-indicating design within Class RK5 → Business Impact: Reduces misreading in dense panels, lowering maintenance errors → Application: High-density control panels and distributed protection networks.
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FAQs
Install the FRN-R-4-1/2 with ferrule-end connections into a standard RK5 fuse block. The fuse measures 2 inches in length and 0.56 inches in width/height, enabling straightforward seating. Use a fuse puller to avoid hand contact with live components, and verify proper seating and alignment before re-energizing the circuit.
The FRN-R-4-1/2 provides 200 kAIC interrupt rating at 250 Vac and 20 kAIC at 125 Vdc, with a voltage rating of 250 Vac and 125 Vdc. This combination supports high-energy fault protection while accommodating common industrial control voltages, ensuring both safety and reliability in demanding environments.
Yes. Its time-delay, dual-element design coupled with RK5 class construction is well-suited for motor protection in control panels. The fuse tolerates inrush due to motor starting while still delivering rapid interruption for short circuits, helping prevent equipment damage and reducing unplanned downtime.
FRN-R-4-1/2 is CE marked and belongs to the RK5 protected family, aligning with European safety and performance expectations. This certification supports compliance in global markets and standardizes protection characteristics across Eaton Bussmann RK5 fuses, simplifying specification, stocking, and maintenance across multi-site installations.
The time-delay, current-limiting design reduces nuisance trips and supports longer equipment life by accommodating startup surges. Its ferrule-end construction enables quick replacement in standard RK5 holders, lowering maintenance time and inventory complexity, which translates into lower lifecycle costs and improved system uptime for production facilities.