Eaton FRN-R-3-1/2 Fuse - Class RK5, 200 kAIC
Part Number: FRN-R-3-1/2
Quick Summary
FRN-R-3-1/2 fuse is a time-delay protection device for industrial power circuits. Engineered for reliability, it helps prevent nuisance trips while safeguarding equipment during inrush and fault events. This FRN-R fuse is CE marked and follows Class RK5 standards, with a finger-safe, dual-element design for safer maintenance. It balances fast fault interruption with selectivity, supporting efficient panel design and reduced maintenance. For system integrators and service teams, it simplifies spare stocking and replacement in Bussmann series installations, delivering consistent performance across voltage levels and providing peace of mind in mission-critical applications.
Product Information
Extended Description
FRN-R-3-1/2 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 3.5 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-3-1/2
UPC
051712507196
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
3.5 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
Special features
Finger safe
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
Feature: Time-delay, dual-element design provides tolerance to inrush currents while maintaining rapid fault interruption. Business Impact: Reduces nuisance tripping and wear on motors and drives, extending equipment life and minimizing downtime. Application: Ideal for motor control centers, drives, and power distribution panels where inrush is common. Feature: 3.5 A amperage rating with 200 kAIC interrupt at 250 VAC and 20 kAIC at 125 VDC. Business Impact: Enhances protection coordination and safety margins, enabling upstream protection to be tuned for reliability. Application: Industrial automation, conveyor systems, and process equipment where load currents spike briefly. Feature: RK5 class, ferrule end connections, non-indicating with finger-safe design. Business Impact: Simplifies installation and field servicing in standard enclosures, reducing maintenance time and exposure risk. Application: New panel builds and retrofit projects in control cabinets and switchgear. Feature: Compact, rugged geometry with 2 in length and ferrule-to-ferrule end connections. Business Impact: Fits a wide range of Bussmann series fuse holders and minimizes enclosure footprint without sacrificing protection. Application: Space-constrained panels, cabinet retrofits, and OEM assemblies. Feature: CE marked and standard packaging supports consistent sourcing and compliance workflows. Business Impact: Streamlines procurement, reduces compliance risk, and improves spare part availability for service teams. Application: Global installations needing reliable, traceable protection components.
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FAQs
FRN-R-3-1/2 is designed for standard ferrule end to ferrule end installations in industrial control panels, motor drives, and power distribution enclosures. With a 2 inch body length and 0.56 inch cross-section, it fits typical Bussmann series fuse holders and busbar layouts. Its ferrule terminations simplify wiring and reduce mounting time during panel upgrades or new builds.
Time-delay means the fuse tolerates brief inrush without tripping, while still providing fast interruption against sustained faults. The FRN-R-3-1/2 is rated at 3.5 A with an interrupt rating up to 200 kAIC at 250 VAC, ensuring selectivity with upstream protections. This prevents nuisance trips during motor startups or heater surges while safeguarding the connected equipment.
Yes, the FRN-R-3-1/2 carries CE marking and adheres to Class RK5 standards. While RoHS compliance is supported by Eaton’s program, verify specific lot compliance using Eaton’s RoHS tool to confirm current status for your production line or regional requirements.
The fuse provides 200 kAIC interrupt rating at 250 VAC and 20 kAIC at 125 VDC, with voltage ratings of 250 VAC and 125 VDC. This combination supports coordination with upstream protective devices in typical industrial power circuits and is suitable for 3.5 A loads in control panels and distribution blocks.
Non-indicating construction means visual inspection is necessary to confirm fuse status, and standard spares should be stocked for quick replacement. Use ferrule-end replacements from the Bussmann series to maintain RK5 coordination. Refer to the manufacturer datasheet for installation notes and to ensure replacement preserves the 200 kAIC and 3.5 A ratings.