Eaton FRS-R-450 Fuse - Class RK5, 450 A, 200 kAIC @ 600 Vac
Part Number: FRS-R-450
Quick Summary
The Eaton FRS-R-450 fuse is a high-current, time-delay protector designed for industrial power distribution. On demanding lines, nuisance tripping during motor starts and inrush can disrupt uptime and drive maintenance costs. This device belongs to the CE-marked RK5 class family, combining reliability with standard compliance for both AC and DC feeders. By selecting a dual-element, current-limiting design, maintenance teams gain predictable protection without sacrificing performance. With a 450 A rating and robust interrupt capability, it scales across mid-to-large equipment such as drives, panels, and feeders, delivering safer, more economical protection. Operational life is supported by a blade-end connection that simplifies replacement and reduces downtime during servicing.
Product Information
Extended Description
FRS-R-450 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 450 A, non-indicating fuse, interrupting rating of 200 kA at 600 Vac and 20 kA at 300 Vdc
Product Name
Eaton Bussmann series FRS-R fuse
Catalog Number
FRS-R-450
UPC
051712508544
Product Length/Depth
5.5 in
Product Height
1.06 in
Product Width
1.06 in
Product Weight
3 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
450 A
Interrupt rating
20 kAIC at 300 Vdc 200 kAIC at 600 Vac
Response time
10 sec at 500%
Voltage rating
600 Vac, 300 Vdc
Number of elements
Dual
Packaging type
Standard
Class
Class RK5
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series FRS-R 600 V Class R 65-600 A fuse data sheet no. 1018
Time-delay, dual-element design reduces nuisance trips during motor starts and inverter inrush while maintaining fast fault clearing. Business impact: smoother commissioning, fewer unplanned shutdowns, and lower maintenance overhead. Application: motor drives, transformers, large feeders, and panelboards where inrush is common and reliability is critical. The FRS-R-450 also delivers reliable current limiting to protect downstream components, improving equipment longevity and reducing repair costs over the asset life. High current rating (450 A) combined with a 200 kAIC interrupt rating at 600 Vac and 20 kAIC at 300 Vdc enables safe operation in heavy fault conditions, minimizing energy release and collateral damage. This translates to higher system availability and reduced downtime for industrial processes. Compatibility and installation are streamlined by blade-end x blade-end connections and standard RK5 form-factor, enabling straightforward field replacement and reduced spare-part variety. Non-indicating design simplifies enclosure layouts, while standard packaging supports quick stocking and procurement.
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FAQs
The FRS-R-450 is designed for high-current branch circuits in industrial power distribution. Use it for motor feeders, drives, and panel boards where inrush is common. Its time-delay, dual-element design limits nuisance trips while delivering robust protection for transformers and feeders, helping maintain uptime in heavy-load environments.
The fuse is rated for 450 A with a voltage rating of 600 Vac and 300 Vdc. It provides interrupt ratings of 200 kAIC at 600 Vac and 20 kAIC at 300 Vdc, with a response time of about 10 seconds at 500% of rated current. These specs enable fast fault clearance while tolerating startup surges in demanding equipment.
Yes. The FRS-R-450 is a Class RK5 fuse with blade-end x blade-end connections and standard packaging. This ensures straightforward compatibility with Bussmann RK5 holders and common industrial cabinet designs, reducing integration risk and simplifying spare-parts management for service teams.
Ensure proper mating with an RK5 housing and verify blade-end connectivity for a secure, low-resistance connection. Adhere to standard safety practices, note the fuse’s 5.5 in length and 1.06 in cross-section, and plan for non-indicating operation by implementing panel-side monitoring to confirm status during maintenance and replacements.
The time-delay design minimizes nuisance trips, reducing unplanned downtime and maintenance costs in high-inrush applications. High fault-energy protection preserves equipment health, lowering repair expenses. Standard RK5 compatibility simplifies spares and procurement, while CE compliance supports facility-wide regulatory alignment and smoother audits, delivering measurable total cost of ownership benefits.