Eaton FRS-R-1-1/8 fuse - CE Marked Class RK5
Part Number: FRS-R-1-1/8
Quick Summary
The Eaton FRS-R-1-1/8 fuse is a time-delay, dual-element protection device designed for motor control and branch circuits. Many engineers struggle with nuisance tripping during inrush, downtime, and unnecessary fuse replacements. This CE-marked Class RK5 fuse delivers proven protection with 20 kAIC at 300 Vdc and 200 kAIC at 600 Vac. Designed for industrial electrical protection with Bussmann-series compatibility, it supports reliable uptime and cost control. Its ferrule-end connections and 5 in length simplify installation in compact control panels, while the non-indicating indicator keeps status clean and the high interrupt rating provides robust protection in demanding fault conditions.
Product Information
Extended Description
FRS-R-1-1/8 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 1.125 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-1-1/8
UPC
051712508094
EAN
5027590426459
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.148 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
1.125A
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
Ferrule end x ferrule 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 up to 60 A fuse data sheet no. 1017
Time-delay, dual-element design minimizes nuisance trips during motor starting and inrush surges, delivering dependable protection without premature replacements. This feature translates to reduced downtime in conveyors, pumps, and feeders while meeting industry standards for branch-circuit protection. Amperage rating of 1.125 A with a voltage rating of 600 Vac / 300 Vdc supports precise, current-limiting protection for mixed AC/DC control circuits. The high interrupt ratings—200 kAIC at 600 Vac and 20 kAIC at 300 Vdc—provide robust fault protection in medium- to high-energy systems. Class RK5 construction and ferrule-end connections enable quick, reliable replacement in existing Bussmann-series basing without rewiring. The 5-inch length and 0.81-inch square footprint fit standard control panels and energy-management cabinets, simplifying installation and maintenance. CE Marking confirms compliance with European electrical safety requirements, while the non-indicating fuse status can be monitored via panel indicators or system analytics integrated with Eaton protection strategy. Applications span industrial automation, motor control centers, and manufacturing lines where uptime and protection precision matter. With Bussmann-series compatibility, you gain access to a broad catalog and long-term availability, supporting predictable procurement and reduced maintenance costs.
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FAQs
To install the FRS-R-1-1/8, ensure the control panel accepts ferrule-end fuses and has standard Bussmann-series holders. Confirm the panel space accommodates a 5 inch length and 0.81 inch width, then insert the fuse with proper alignment to the ferrule ends. Use compatible holders and verify the circuit is de-energized during replacement to avoid arcing. This design supports quick swaps without rewiring, thanks to its ferrule-end x ferrule-end connection.
Key ratings include amperage 1.125 A and voltage 600 Vac / 300 Vdc, with interrupt ratings of 200 kAIC at 600 Vac and 20 kAIC at 300 Vdc. The time-delay, dual-element construction provides sustained protection during motor start-up and short surges, reducing nuisance trips while maintaining fast fault clearing. This makes it suitable for mixed AC/DC control circuits in industrial panels.
Yes. The time-delay, dual-element RK5 fuse is specifically designed to handle motor inrush, reducing nuisance tripping while still delivering rapid fault clearing for short circuits. Its 1.125 A rating and high interrupt capacity enable reliable protection for motor starters, conveyors, and automation equipment without sacrificing uptime. For best results, pair with appropriate protection schemes and verify the exact motor inrush characteristics in your panel design.
The FRS-R-1-1/8 is CE Marked, indicating compliance with European safety standards for electrical protection devices. Its Class RK5 designation confirms the fuse family and intended use in branch-circuit protection. These certifications support compliant installation across European installations and aid in vendor qualification, procurement, and end-user safety verification in industrial environments.
The FRS-R-1-1/8 offers durable, high-interrupt protection that minimizes fuse failures and downtime in automation lines, translating to lower maintenance costs and reduced production interruptions. Its compatibility with the Bussmann Full Line catalog improves parts availability and sourcing consistency. Over the lifecycle, fewer replacements and faster changeouts contribute to a lower total cost of ownership in industrial facilities.