Eaton FRN-R-85 fuse - RK5 Class, 200 kAIC rating
Part Number: FRN-R-85
Quick Summary
FRN-R fuse from Eaton Bussmann provides reliable overcurrent protection for industrial power circuits and motor control panels. When downtime is costly, engineers need fuses that tolerate inrush and brief surges without nuisance blows. This time-delay, dual-element FRN-R RK5 fuse is CE marked for international use and delivers an 85 A rating with a 200 kAIC interrupt capability at 250 Vac, making it suitable for demanding protection duties. The Class RK5 family is designed for easy replacement in standard blade-end holders, and the non-indicating fuse indicator reduces panel clutter while enabling remote status monitoring. By ensuring selective coordination and fast fault isolation, this device supports safer, more efficient electrical protection and maintenance budgeting.
Product Information
Extended Description
FRN-R-85 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 85 A, non-indicating fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series FRN-R fuse
Catalog Number
FRN-R-85
UPC
051712152785
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.15 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
85 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
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 fuses 70 to 600 amps No. 1020
Feature: Time-delay, dual-element design provides tolerance to inrush and brief surges. Business Impact: Reduces nuisance tripping and unplanned downtime in motor start-up and load-switching scenarios. Application: Ideal for drives, conveyors, and equipment with reactive loads. Feature: 85 A amperage rating with a 200 kAIC interrupt rating at 250 Vac. Business Impact: Protects feeders and panels from catastrophic faults while preserving upstream equipment. Application: Main distribution panels and control enclosures in manufacturing lines. Feature: Class RK5 construction with blade end x blade end connections. Business Impact: Fast, drop-in replacement in standard fuse holders; minimizes panel modification and maintenance time. Application: Retrofit projects and new machine builds relying on common Bussmann RK5 hardware. Feature: Compact 5 in length and 0.81 in cube with non-indicating status. Business Impact: Maximizes panel density and reduces wiring complexity; supports remote fault monitoring strategies. Application: Small to mid-size electrical panels in automation cabinets. Feature: CE Marked compliance and Bussmann RK5 family data sheet availability. Business Impact: Streamlines regulatory alignment and procurement with a trusted, documented protection device. Application: Global installations requiring standardized protective devices; consult FRN-R RK5 datasheet No. 1020 for performance details.
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FAQs
FRN-R-85 uses blade end x blade end connections and fits standard blade-type fuse holders. Its 5 in length and 0.81 in width enable convenient drop-in replacement in commonly configured low-voltage panels, reducing downtime during maintenance or upgrades.
FRN-R-85 provides a 200 kAIC interrupt rating at 250 Vac, with additional capability at 125 Vdc. This high interrupt rating supports safe fault clearance in demanding industrial circuits while maintaining system uptime.
Yes, FRN-R-85 is a time-delay, dual-element fuse. This design tolerates brief inrush currents typical of motors and drives, reducing nuisance opens and enabling reliable protection for loads with startup surges.
FRN-R-85 is CE marked, indicating conformity with European safety standards. This simplifies regulatory compliance for international deployments and supports safer integration within global automation projects.
Common use cases include protection for motor control centers, feeders, and low-voltage branch circuits. Benefits include fast fault isolation, reduced downtime from nuisance trips, and straightforward procurement due to standard RK5 form factor and documented performance (No. 1020 datasheet).