Eaton FRS-R-40 Fuse - RK5 Class, 200 kAIC at 600 Vac
Part Number: FRS-R-40
Quick Summary
Eaton FRS-R-40 fuse is a time-delay protection device designed for branch circuits in industrial control panels. This solution helps minimize downtime by reliably carrying startup surges while rapidly clearing faults. CE marked and classified as RK5 fuse, it delivers robust performance in harsh industrial environments, with a high interrupt rating appropriate for distributed power systems. By combining a 40 A rating with dual-element protection, it supports safer, more predictable panel protection and reduces nuisance trips. The non-indicating design keeps costs down in large installations, while its ferrule-end connections simplify wiring and improve field reliability for panel builders and maintenance teams.
Product Information
Extended Description
FRS-R-40 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 40 A, non-indicating fuse, interrupting rating of 200 kA at 600 Vac and 20 kA at 250 Vdc
Product Name
Eaton Bussmann series FRS-R fuse
Catalog Number
FRS-R-40
UPC
051712508360
Product Length/Depth
11.63 in
Product Height
2.34 in
Product Width
2.34 in
Product Weight
2.25 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
40 A
Interrupt rating
200 kAIC at 600 Vac 20 kAIC at 250 Vdc
Response time
10 sec at 500%
Voltage rating
600 Vac, 250 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
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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, current-limiting RK5 fuse design. Benefit: Tolerates temporary overloads and startup surges without nuisance trips, increasing equipment uptime and reducing unnecessary maintenance. Application: Motor control centers, drives, and branch circuits in automation panels. Feature: High interrupt rating of 200 kAIC at 600 Vac (and 20 kAIC at 250 Vdc). Benefit: Provides robust fault-clearing capability for large feeders and critical loads, enabling upstream protection coordination. Application: Main feeds and distribution panels in heavy industrial environments. Feature: 40 A amperage rating with standard ferrule-end-to-end connections. Benefit: Clear current protection boundaries with reliable mechanical terminations, simplifying installation and service. Application: Industrial switchgear, control panels, and machine safety circuits. Feature: Non-indicating (no fuse status indicator). Benefit: Lower upfront costs and simpler stocking in large deployments, while maintenance teams can leverage external indicators or monitoring. Application: Large-scale installations with centralized health monitoring. Feature: 11.63 in length, 2.34 in height/width, and 2.25 lb weight, packaged as standard Bussmann-series components. Benefit: Predictable form factor supports easy panel layout, compatibility with existing Bussmann footprints, and straightforward replacement. Application: Retrofit projects and new builds requiring consistent form factor. Feature: 600 Vac / 250 Vdc voltage rating and 40 A rating align with typical industrial controls and DC-bus applications. Benefit: Broad compatibility across AC and DC control circuits, reducing the need for multiple fuse families. Application: Industrial automation, drives, and control panels.
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FAQs
The FRS-R-40 is a Class RK5 fuse with ferrule-end x ferrule-end connections, designed to fit Bussmann-series holders and standard industrial panel footprints. Its 11.63 in length and 2.34 in width height ensure predictable mounting in control cabinets, while remaining compatible with common mounting rails and fuse-block configurations found in motor control centers and distribution panels.
FRS-R-40 provides an interrupt rating of 200 kAIC at 600 Vac and 20 kAIC at 250 Vdc, with a voltage rating of 600 Vac / 250 Vdc. This combination supports main circuit protection and DC bus safety in mixed AC/DC applications, enabling reliable fault clearing and protecting downstream equipment from catastrophic faults.
Yes. The FRS-R-40 fuse is explicitly rated for 600 Vac and 250 Vdc use, with a 40 A rating and time-delay dual-element design. It is well suited for motor control centers, power distribution panels, and automation enclosures where startup surges and transient faults must be managed without sacrificing protection.
Because the FRS-R-40 is non-indicating, status monitoring relies on external indicators or panel health systems. For maintenance planning, verify ampacity protection in the panel, ensure ferrule-end terminations remain secure, and replace on a preventive schedule aligned with panel maintenance cycles. Its robust RK5 construction supports long service life under common industrial conditions.
Expected ROI comes from reduced downtime due to fewer nuisance trips, improved fault clearance reliability, and lower spare-parts inventory with a standard RK5 fuse family. The 40 A rating matches typical branch-circuit protection needs, while the high interrupt rating minimizes downstream damage. Combined with easy installation and durable construction, the FRS-R-40 helps extend panel uptime and lower total cost of ownership.