Eaton FRN-R-350 Fuse - RK5 Time-Delay
Part Number: FRN-R-350
Quick Summary
FRN-R-350 fuse provides time-delay, current-limiting protection for motor control panels and similar industrial power circuits. In demanding automation environments, nuisance trips or mismatched fuses can trigger downtime and costly recalls. This device helps prevent that with a dual-element RK5 design and a 350 A rating, delivering selective coordination and reliable fault clearing. It is CE marked and RoHS compliant, aligning with essential EU safety and environmental requirements. Designed for 250 Vac operation and blade-end connections, the FRN-R-350 integrates smoothly into Bussmann RK5 families, supports easy replacement, and helps streamline spare-part inventories while maintaining high availability.
Product Information
Extended Description
FRN-R-350 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 350 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-350
UPC
051712507523
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
350 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
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
Feature: Time-delay, dual-element architecture provides selective protection. Business Impact: Reduces nuisance trips and heat stress on components, extending equipment life and lowering maintenance costs. Application: Motor starters and power feeders in automation panels benefit from controlled inrush and reliable fault clearing. Feature: 350 A amperage rating. Business Impact: Enables protection of large feeders and motor circuits without nuisance blows. Application: Heavy-load drives in manufacturing lines gain improved reliability. Feature: Interrupt rating of 200 kAIC at 250 Vac; 20 kA at 250 Vdc. Business Impact: Safe fault clearance in high-energy circuits, reducing arc flash risk and downstream damage. Application: Switchgear and panel boards in industrial plants. Feature: Blade end x blade end connections with finger-safe housing. Business Impact: Simplifies installation, reduces maintenance time, and minimizes touch hazards. Application: Fast, tool-free panel swaps and spare-part interchangeability. Feature: CE marked and RoHS compliant. Business Impact: Regulatory alignment simplifies procurement for regulated sectors. Application: Automotive, food & beverage, and general industrial automation projects.
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FAQs
FRN-R-350 uses blade-end x blade-end connections compatible with Bussmann RK5 family panels. Ensure a 250 Vac supply, 350 A rating, and that the holder space accommodates an 8.63 in length device. Use the standard packaging and follow panel mounting practices to maintain finger-safe access and quick swap capability.
The fuse provides an interrupt rating of up to 200 kAIC at 250 Vac and 20 kA at 250 Vdc. It has an approximate response time of 10 seconds at 500% overload, enabling controlled fault clearing while minimizing nuisance tripping in motor circuits.
Yes. The time-delay, dual-element RK5 design is built to tolerate startup inrush without tripping while still delivering fast fault clearance for short-circuit events, supporting reliable motor protection and reduced production downtime.
FRN-R-350 is CE marked and RoHS compliant, reflecting adherence to EU safety and environmental standards. This helps simplify procurement for regulated industries and supports global compliance programs.
As a non-indicating fuse with blade-end connections, plan for periodic inspection during panel maintenance. Keep spares within RK5 families and reference the Bussmann data sheets for replacement timing and compatibility; replacement is straightforward due to standard form factor.