Eaton FRS-R-1-1/4 Fuse - RK5, 200 kAIC @ 600 Vac
Part Number: FRS-R-1-1/4
Quick Summary
The Eaton Bussmann FRS-R fuse provides time-delay, current-limiting protection for industrial controls and motor circuits. This helps reduce nuisance trips and unplanned downtime by delivering precise coordination in control panels. CE Marked safety compliance supports global deployments, while the RK5 class designation and ferrule-end connections enable standardized, reliable panel installations. Designed for industrial environments, this fuse balances protection with ease of integration, delivering measurable efficiency gains and lower total cost of ownership in automation systems.
Product Information
Extended Description
FRS-R-1-1/4 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 1.25 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-1-1/4
UPC
051712508100
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.1 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
1.25 A
Interrupt rating
200 kAIC at 600 Vac 20 kAIC at 300 Vdc
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
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series FRS-R 600 V Class R up to 60 A fuse data sheet no. 1017
Feature → Business Impact → Application: Time-delay, dual-element design provides selective protection for motor starters and feeders, reducing arc flash risk and improving uptime in automation lines. Application: motor control centers and machine enclosures where accurate fault clearing prevents unnecessary shutdowns while sustaining productivity. Feature → Business Impact → Application: Current-limiting capability (1.25 A) delivers fast fault clearance, minimizing conductor heating and insulation stress; Application: small-wattage control circuits and low-current protection zones. Feature → Business Impact → Application: High interrupt rating (200 kAIC at 600 Vac; 20 kAIC at 300 Vdc) ensures reliable performance in high-energy fault events; Application: panel feeders and power distribution blocks with stringent safety requirements. Feature → Business Impact → Application: Ferrule-end x ferrule-end connections support quick, secure wiring and reuse in standardized RK5 holders; Application: multi-channel assemblies and modular control panels. Feature → Business Impact → Application: Class RK5 compatibility and standard 5 in length streamline procurement and stock keeping; Application: OEMs replacing legacy RK5 fuses with a drop-in, performance-oriented solution. Feature → Business Impact → Application: Non-indicating design reduces nuisance indicators while leveraging robust protection; Application: applications where visual status indicators are unnecessary or undesired in clean-room or compact layouts.
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FAQs
Yes. The FRS-R-1-1/4 is a Class RK5 fuse designed for ferrule-end x ferrule-end connections and fits standard RK5 fuse holders found in industrial control panels. Its 5 inch length aligns with common mounting footprints, enabling quick, drop-in replacements in existing control architectures without rewiring or adapter kits.
Key ratings include a 1.25 A amperage rating, 600 Vac and 300 Vdc voltage ratings, and a 200 kAIC interrupt rating at 600 Vac (20 kAIC at 300 Vdc). The time-delay, dual-element design supports selective coordination in motor and control circuits, while maintaining fast fault clearing to protect conductors.
Yes. The FRS-R is a time-delay, dual-element, current-limiting RK5 fuse designed for motor control and industrial automation panels. Its high interrupt rating and ferrule-end connections simplify integration in control cabinets, enabling reliable motor protection, enhanced uptime, and improved coordination with upstream and downstream protection devices.
The product is CE Marked, indicating compliance with relevant safety standards in many regions. For broader regulatory considerations, Eaton provides a RoHS compliance verification pathway via its RoHS Search Tool, which can help confirm material restrictions where required for your project documentation.
The FRS-R’s time-delay, dual-element design promotes selective protection and reduces unnecessary replacements due to nuisance trips, lowering maintenance costs. Its durable ferrule-end construction supports secure connections and faster field replacements, delivering lower labor costs during service and improved overall equipment efficiency in automation environments.