Eaton FRS-R-4-1/2 Fuse - Class RK5
Part Number: FRS-R-4-1/2
Quick Summary
The Eaton FRS-R-4-1/2 fuse provides time-delay, dual‑element protection for branch circuits in industrial controls. Nuisance blowing and mis-trips can throttle production, so reliable, selective protection is critical—this device helps minimize downtime while safeguarding critical loads. CE marking and Class RK5 compliance ensure suitability for IEC-based panel builds, and the dual-element design supports robust fault clearing. In practice, this fuse delivers predictable protection in compact control panels, delivering business value through improved uptime and safer, standards-aligned installations. Secondary benefits include straightforward integration with ferrule-end terminations and standard packaging, which translate to faster assembly and lower field rework for engineering teams.
Product Information
Extended Description
FRS-R-4-1/2 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 4.5 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-4-1/2
UPC
051712508216
EAN
5027590426770
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.145 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
4.5A
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
Feature → Time-delay, dual-element design enables short-circuit protection while tolerating temporary inrush, reducing nuisance trips and widening application windows in motor control and power distribution. Business Impact → Fewer production stops and lower maintenance costs due to reliable fault clearing; application in machine controls improves line uptime and equipment longevity. Application → Suitable for 600 Vac and 300 Vdc circuits within industrial control panels and distribution blocks, enabling versatile protection across mixed-voltage systems. Feature → 4.5 A amperage rating with a 600 Vac / 300 Vdc voltage rating provides precise protection for small-to-medium loads, supporting safe operation and energy efficiency. Business Impact → Optimized protection without oversizing, lowering wasteful energy dissipation and ensuring proper coordination with upstream protective devices. Application → Ideal for control panels, panels in packaging and processing lines, and machine builders seeking predictable performance. Feature → High interrupt ratings (200 kAIC at 600 Vac; 20 kAIC at 300 Vdc) deliver selective trip and strong short-circuit protection. Business Impact → Reduced bill-of-materials risk and improved safety margins in high-short-circuit environments. Application → Power distribution blocks and motor starters where fault currents peak. Feature → Class RK5 designation with ferrule-end connections and non-indicating status aligns with standard Bussmann/IEEE practices. Business Impact → Simplified procurement, consistent replacement parts, and compatibility with common automation cables. Application → Panel builders and maintenance teams benefit from quick sourcing and reliable field termination. Feature → Standard packaging and compact form factor (5 in length, 0.81 in width/height) fit tight enclosures without compromising protection. Business Impact → Space optimization in crowded panels and faster installation reduces lead times. Application → Retrofit projects and new builds where enclosure real estate is at a premium.
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FAQs
The FRS-R-4-1/2 uses ferrule-end terminations and measures 5 in long with a cross-section of 0.81 in by 0.81 in. It is non-indicating, Class RK5, and designed for standard Bussmann packaging, enabling straightforward retrofits and new installations in compact panels.
Yes. The fuse is rated for 600 Vac and 300 Vdc, with a 4.5 A current rating, making it suitable for mixed-voltage industrial control applications, motor control centers, and power distribution in automation panels.
Ideal for industrial control panels, machine wiring, and motor starters where reliable branch-circuit protection is required. Its time-delay characteristics tolerate inrush while delivering fast fault clearing in high-current environments.
The device carries CE Marking and adheres to Class RK5 fuse standards, aligning with IEC-based panel and equipment certification requirements common in industrial automation and electrical protection schemes.
Non-indicating design minimizes field indicators that can fail; the ferrule terminations support durable field connections, reducing maintenance checks. With its high interrupt ratings, you expect lower nuisance trips and longer intervals between replacements in well-coordinated protection schemes.