Eaton FRS-R-20 Fuse - Class RK5, 200 kAIC, 600 Vac
Part Number: FRS-R-20
Quick Summary
The Eaton FRS-R-20 fuse is a time-delay, current-limiting solution designed to protect industrial power circuits in machine controls and panelboards. In practice, engineers often struggle with nuisance trips during motor start-ups and inrush events; this dual-element fuse mitigates that risk while delivering reliable protection. Key certifications include CE Marking and RoHS support, with Class RK5 compatibility for standardized panel integration. By combining compact form with robust interrupting capability, the FRS-R-20 delivers both reliability and cost-effective maintenance for modern automation environments while aligning with common procurement and compliance requirements.
Product Information
Extended Description
FRS-R-20 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 20 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-20
UPC
051712508322
Product Length/Depth
5 in
Product Height
0.8 in
Product Width
0.8 in
Product Weight
0.16 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
20 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: The FRS-R-20’s time-delay, dual-element design tolerates motor inrush and startup surges, reducing nuisance trips and minimizing downtime in automated lines. This translates to higher line uptime and smoother control-panel operation in packaging, assembly, and process environments. Application: ideal for motor starters and power distribution panels in industrial automation where reliable coordination with other selective devices is essential. Feature → Business Impact → Application: With a 200 kAIC interrupt rating at 600 Vac and 20 kAIC at 300 Vdc, fault currents are cleared quickly and safely, protecting priceless equipment and reducing post-fault damage in high-energy circuits. Application: large control cabinets and machine feeds in manufacturing lines that demand heavy fault-current resilience. Feature → Business Impact → Application: The 600 Vac / 300 Vdc rating supports both AC and DC systems, enabling cross‑domain protection in mixed-control architectures. Application: mixed-drive systems, robotics racks, and condensate-free panels where DC bus protection is required. Feature → Business Impact → Application: Ferrule end x ferrule end design and a compact 5 in length simplify installation in standard RK5 holders, lowering installation time and inventory complexity. Application: retrofit projects and new builds in machine centers where space is at a premium. Feature → Business Impact → Application: CE Marked compliance and non-indicating operation minimize panel clutter and support regulatory alignment without additional indicators. Application: certified control panels and safety-conscious deployments in process industries. Feature → Business Impact → Application: 0.8 in width/height and 0.16 lb weight deliver a compact, cost-efficient solution for high-density panel layouts in automotive and packaging lines. Application: space-constrained electrical panels in high-volume production environments.
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FAQs
Install the FRS-R-20 using ferrule-end terminals aligned with the carrier sockets. The fuse length is 5 inches with ferrule ends, designed to drop into standard RK5 holders without adapters. Ensure correct polarity and seating to prevent arcing, then verify the circuit is de-energized before connection. This streamlines maintenance and reduces rework in control panels.
The FRS-R-20 is a 20 A time-delay, dual-element fuse with an interrupt rating of 200 kAIC at 600 Vac and 20 kAIC at 300 Vdc. It is rated for 600 Vac and 300 Vdc, with a response time of 10 seconds at 500% overload. These specs support reliable fault clearing in high-energy industrial circuits.
Yes. Its time-delay, dual-element design accommodates motor inrush while delivering fast fault clearing, reducing nuisance trips during startup. The 20 A rating suits small-to-medium motor circuits, and the 600 Vac rating aligns with standard motor and drive configurations in automation environments.
The FRS-R-20 is CE marked, demonstrating compliance with European electrical safety requirements. Eaton also provides access to RoHS compliance tooling to verify restricted substances, supporting regulatory alignment in global manufacturing. The fuse belongs to the Class RK5 family, a widely adopted protection standard in control panels.
The FRS-R-20 combines a compact 5 in length with ferrule-end connections and a non-indicating design, reducing hardware costs and panel footprint. Its high interrupt ratings and time-delay capability offer durable protection for high-energy, high-cycle applications, delivering predictable lifecycle costs and reliable protection in dense automation environments.