Eaton FRN-R-300 Fuse - RK5 Class, 200 kAIC CE Marked
Part Number: FRN-R-300
Quick Summary
FRN-R-300 fuse provides time-delay protection for power circuits in industrial control and motor applications. It helps prevent nuisance tripping in short-circuit and inrush conditions, reducing unplanned downtime. CE marked, RK5 class compatible, and finger-safe, it supports safer maintenance in live environments. Designed for Eaton Bussmann series integration, it delivers reliable protection with predictable response times for motor drives and panels. With a 300 A rating and a dual-element design, FRN-R-300 balances fast fault clearing with tolerance for startup in high-inrush loads. Its 200 kAIC interrupt rating at 250 Vac and 20 kAIC at 250 Vdc enables safe protection for medium to large panels. For engineers, FRN-R-300 offers straightforward integration with blade-end connections and the standard packaging.
Product Information
Extended Description
FRN-R-300 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 300 A, non-indicating fuse, interrupting rating of 200 kA at 250 Vac and 20 kA at 250 Vdc
Product Name
Eaton Bussmann series FRN-R fuse
Catalog Number
FRN-R-300
UPC
051712507516
Product Length/Depth
8.63 in
Product Height
2.38 in
Product Width
2.38 in
Product Weight
1.95 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
300 A
Interrupt rating
200 kAIC at 250 Vac 20 kAIC at 125 Vdc
Response time
10 sec at 500%
Voltage rating
250 Vac, 125 Vdc
Number of elements
Dual
Packaging type
Standard
Class
Class RK5
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Special features
Finger safe
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series Fusetron FRN-R RK5 fuse data sheet for fuses 70 to 600 amps No. 1020
Time-delay performance from FRN-R-300 reduces nuisance trips during motor startups while protecting feeders from sustained faults. This translates into lower maintenance costs and improved line uptime in manufacturing cells and packaging lines. High interrupt rating provides robust fault clearance, enabling safe operation of high-current drives in machine tools and conveyor systems. The blade-end connections, non-indicating design, finger-safe construction, and standard packaging simplify retrofits and ongoing service in busy automation environments. CE marking and RK5 class compatibility ensure regulatory alignment and easy integration with Eaton Bussmann’s full line, facilitating design-in and procurement workflows. The fuse’s compact footprint (8.63 in length, 2.38 in width and height) with a 1.95 lb weight supports efficient cabinet layout planning and thermal management in dense control panels. Overall, FRN-R-300 helps reduce downtime, improve reliability, and streamline maintenance in industrial automation projects.
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FAQs
The FRN-R-300 is a time-delay, dual-element, current-limiting fuse designed to protect industrial power circuits and motor control panels. As part of the Eaton Bussmann RK5 family, it handles motor startup surges while delivering robust overload protection with a 200 kAIC rating at 250 Vac and compatibility with blade-end terminations for easy integration into existing assemblies.
Yes. FRN-R-300 is built to fit the RK5 Class framework and uses blade-end connections, aligning with standard RK5 fuses. This enables straightforward retrofits, stock interchangeability in panels, and seamless replacement within Eaton Bussmann’s RK5 product line while preserving protection performance and footprint compatibility.
Key ratings include a 300 A amperage rating, 250 Vac voltage rating, and 125 Vdc rating. The fuse provides a 200 kAIC interrupt rating at 250 Vac and 20 kAIC at 250 Vdc, with a 10-second response time at 500% overload. These specs support reliable protection for high-current drives and challenging inrush conditions.
Mid-to-large control panels, motor starter assemblies, and power-distribution enclosures in manufacturing and process environments benefit most. The fuse’s high interrupt capability, time-delay behavior for inrush, and blade-end mounting simplify upgrades, improve uptime, and reduce nuisance trips in demanding automation applications.
FRN-R-300 is CE Marked and part of the RK5 Class protection family, with a finger-safe, non-indicating design. These features support regulatory compliance and safer maintenance in live environments, while ensuring compatibility with Eaton Bussmann series protections in modern electrical protection schemes.