Eaton FRN-R-20 Fuse - RK5 Class, 20 A, CE Marked
Part Number: FRN-R-20
Quick Summary
Eaton FRN-R-20 fuse provides time-delay protection for motors and feeders in industrial control panels. Engineers often contend with nuisance trips and short-cycling that disrupt production and complicate maintenance. This FRN-R-20 is designed to meet CE safety requirements, supports RoHS compliance, and uses RK5 construction for reliable time-delay protection. With a 20 A rating at 250 Vac and rugged ferrule-end connections, it integrates smoothly into standard panels, delivering uptime and protection. By combining dual-element design with a high interrupt rating, the FRN-R-20 provides dependable coordination with upstream breakers. Manufacturers benefit from reduced spare parts costs and simpler maintenance planning when using standardized RK5 fuse family.
Product Information
Extended Description
FRN-R-20 Eaton: Eaton Bussmann Series Class RK5 fuse, FRN-R, time-delay, dual-element, current limiting fuse, 20 A, non-indicating fuse, interrupting rating of 200 kA at 250 Vac and 20 kA at 125 Vdc
Product Name
Eaton Bussmann series FRN-R fuse
Catalog Number
FRN-R-20
UPC
051712101752
Product Length/Depth
1.56 in
Product Height
1.56 in
Product Width
1.56 in
Product Weight
0.9 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
20 A
Interrupt rating
20 kAIC at 125 Vdc 200 kAIC at 250 Vac
Response time
8 sec at 500%
Voltage rating
250 Vac, 125 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 Fusetron FRN-R RK5 fuse data sheet for up to 60 amps No. 1019
Feature: Time-delay, dual-element design. Benefit: Allows temporary inrush currents without nuisance trips, increasing equipment uptime and reducing unplanned downtime in motor circuits. Application: Ideal for motor starters and feeders in HVAC, pumps, and conveyors where load surges occur. Feature: 20 A current rating at 250 Vac. Benefit: Clear, predictable protection for standard industrial loads, enabling consistent protection while avoiding nuisance outages. Application: Panelboards and disconnects in process lines where steady performance is required. Feature: High interrupt rating (200 kAIC at 250 Vac, 20 kAIC at 125 Vdc). Benefit: Superior fault withstand capability, safeguarding downstream equipment and wiring in catastrophic fault conditions. Application: Heavy-duty control panels and motor drives with demanding short-circuit scenarios. Feature: Class RK5, ferrule end connections, non-indicating. Benefit: Simplified wiring, reliable solder-free connections, and straightforward replacement during maintenance. Application: Retrofit projects and new builds using Bussmann RK5 family across industrial automation lines. Feature: Standard packaging and compact form factor (1.56 in length/width/height). Benefit: Easy enclosure fit and faster installation in crowded control cabinets. Application: Enclosed panels, compact distribution boards, and OEM equipment. Feature: Compliance and safety alignment (CE marked, RoHS support). Benefit: Streamlined regulatory readiness and sustainability alignment for European deployments. Application: Certified equipment for global installations where compliance documentation matters. Industry context: The FRN-R fuse family is widely adopted in automation and electrical protection schemes, supporting lifecycle cost reduction and predictable protection curves across installations.
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FAQs
The FRN-R-20 combines time-delay, dual-element protection with a 20 A rating and a high interrupt capacity (200 kAIC at 250 Vac). This enables coordination with upstream protection while tolerating motor inrush, reducing nuisance trips and enabling smoother startup sequences in automated lines.
Ferrule end x ferrule end connections provide a secure, solder-free interface that installers can quickly crimp into standard Bussmann RK5 holders. This reduces installation time, improves reliability in vibration-prone environments, and simplifies replacement during maintenance windows.
The FRN-R-20 is CE marked, indicating compliance with European safety standards, and Eaton provides RoHS compliance support. The RK5 class designation also signals adherence to a widely used fuse family standard for reliable, predictable protection in industrial systems.
Key specs include 20 A amperage rating, 250 Vac maximum voltage, 200 kAIC interrupt rating at 250 Vac, and 20 kAIC at 125 Vdc. The response time is 8 seconds at 500% overload, with a dual-element, current-limiting design suitable for demanding motor protection tasks.
Utilize the ferrule-ended, RK5-compatible form factor to minimize panel modification and ensure quick field replacements. The fuse’s compact 1.56 in dimensions fit tight drawer spaces, while its non-indicating design reduces visual clutter in maintenance checks. These factors contribute to reduced downtime and inventory costs.