Eaton FRN-R-50 fuse - RK5 Class, CE Marked
Part Number: FRN-R-50
Quick Summary
The Eaton FRN-R-50 fuse protects motor circuits with time-delay RK5 performance in electrical protection and circuit control applications. In industrial panels, inrush currents can trigger nuisance trips, causing downtime and wasted energy; this device reduces that risk while delivering reliable protection. CE Marked compliance and RK5 class designation align with European standards and common panel practice, while the Bussmann series lineage offers familiar installation and spare parts compatibility. The 50 A rating, 3 inch length, ferrule-end connections, and non-indicating design streamline retrofits and field service. For OEMs and maintenance teams, it combines rugged interrupt capacity with straightforward sourcing, enabling consistent protection across motor starters, drives, and distribution panels.
Product Information
Extended Description
FRN-R-50 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 50 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-50
UPC
051712101806
Product Length/Depth
3 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
3.1 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
50 A
Interrupt rating
20 kAIC at 125 Vdc 200 kAIC at 250 Vac
Response time
10 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
Time-delay dual-element design enables selective protection, reducing nuisance trips during motor inrush and shortening downtime, which translates to higher machine availability and lower maintenance costs in production lines. The business impact is clear: steadier processes and longer equipment life in motors, contactors, and feeders; applicable to motor control centers and DC control panels where inrush is common. The high interrupt ratings—200 kAIC at 250 VAC and 20 kAIC at 125 VDC—provide strong fault clearance, safeguarding power distribution and reducing the risk of arc flash incidents in harsh industrial environments. With a 250 VAC / 125 VDC voltage rating and a 50 A amperage rating, this fuse supports dual-voltage systems, enabling seamless integration into mixed-voltage equipment and minimizing parts stock. The 3 inch length and ferrule end x ferrule end connections offer quick, secure termination, which shortens installation time and improves field reliability in panel builds. Its standard packaging and non-indicating fuse indicator simplify replacement cycles and spare-part planning, while CE Marked compliance confirms suitability for European installations and regulated markets. The RK5 class designation aligns with established protection schemes, ensuring compatibility with Bussmann series components and industry-standard coordination in control gear and switchgear assemblies.
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FAQs
The FRN-R-50 is a time-delay, dual-element fuse rated at 50 A, designed to protect motor circuits and associated control gear. Its RK5 class and 250 VAC/125 VDC ratings handle typical motor startup inrush while the high interrupt capacity helps contain faults. Install it in distribution panels, motor starters, and drive systems to balance protection with uptime.
Yes. FRN-R-50 is part of Eaton Bussmann’s RK5 family, categorized as a Class RK5 fuse with ferrule-end terminations. Its 3 inch body length and standard packaging support straightforward substitutions in existing RK5-equipped panels, minimizing redesign while preserving protection coordination with upstream devices.
FRN-R-50 provides 200 kAIC interrupt capability at 250 VAC and 20 kAIC at 125 VDC. These ratings enable robust fault clearance for motor drives and power distribution circuits, reducing the risk of cascading faults in industrial environments while maintaining selectivity with upstream protective devices.
The FRN-R-50 measures 3.0 inches in length with 0.81 inches in width and height. It weights approximately 3.1 pounds and uses ferrule-end connections on both sides, enabling quick, secure termination in standard fuse holders and panel boards.
The FRN-R-50 carries CE Marked compliance, aligning with European safety requirements. It is a Class RK5 fuse within the Bussmann series, designed for reliable protection in industrial electrical protection and circuit control applications, with compatibility for European and global installations where RK5 protection is standard.