Eaton FRS-R-125 Fuse - Class RK5, 200 kAIC, 600 Vac
Part Number: FRS-R-125
Quick Summary
The Eaton FRS-R-125 fuse provides time-delay, dual-element overcurrent protection for industrial controls. In compact control panels, nuisance trips and insufficient interrupt ratings can stall production and complicate safety compliance. This CE-marked Class RK5 fuse delivers reliable protection with a 200 kAIC interrupt rating at 600 Vac and 20 kAIC at 300 Vdc, supporting selective coordination in demanding power circuits. Designed for blade-end connections and non-indicating operation, it enables straightforward installation and maintenance in limited spaces. Its time-delay behavior helps prevent nuisance trips from brief surges, reducing downtime while maintaining critical circuit protection.
Product Information
Extended Description
FRS-R-125 Eaton: Eaton Bussmann Series Class RK5 fuse, FRS-R, time-delay, dual-element, current limiting fuse, 125 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-125
UPC
051712508452
Product Length/Depth
9.63 in
Product Height
1.6 in
Product Width
1.6 in
Product Weight
1.05 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
125 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
Blade end x blade 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 65-600 A fuse data sheet no. 1018
Feature: Time-delay, dual-element, current-limiting fuse. Business impact: Reduces nuisance tripping and improves protection coordination in evolving automation lines. Application: Motor controllers and branch circuits in process automation. The durable delay allows momentary overloads to pass without sacrificing protection for sustained faults, improving machine uptime. Feature: 125 A amperage rating and 200 kAIC interrupt capability at 600 Vac. Business impact: Supports high-energy fault interruption while minimizing equipment damage. Application: Heavy machinery, conveyors, and power distribution in manufacturing cells. Feature: Class RK5 and Blade end x blade end connection. Business impact: Standardized form factor simplifies replacement in retrofit projects and reduces spare part variance. Application: Panelboards and control cabinets with Bussmann RK5 fuses. Feature: Time-to-protect specs—10 seconds at 500% overload. Business impact: Clear fault response expectations improve safety checks and maintenance planning. Application: Routine testing and routine protection assessments in control architectures. Feature: Non-indicating fuse for clean panel presentation. Business impact: Easier visual inspection and reduced false alarms in diagnostic workflows. Application: Industrial automation cabinets with strict space and visibility considerations. Feature: CE Marked compliance with industry safety expectations. Business impact: Facilitates regulatory alignment and faster procurement cycles for international projects. Application: Global machinery deployments and multi-site installations.
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FAQs
FRS-R-125 uses blade end x blade end connections and a standard RK5 form factor, making it compatible with Bussmann RK5 fuse holders and common Eaton/Bussmann panel assemblies. Ensure panel space accommodates a 9.63 in length and 1.6 in width and that mounting supports blade contact alignment for reliable seating. Always consult the latest data sheet no. 1018 for wiring and safe-termination guidance.
Key ratings include 125 A amperage, 600 Vac / 300 Vdc voltage rating, and an interrupt rating of 200 kAIC at 600 Vac (20 kAIC at 300 Vdc). The fuse is time-delay with a 10-second response at 500% overload, suitable for industrial motors and short-term surge events while protecting downstream equipment.
Yes. The dual-element, current-limiting RK5 fuse is designed for selective coordination in motor and power circuits, providing reliable protection against short circuits and overloads with a time-delay characteristic that tolerates inrush while preventing nuisance trips during normal startup sequences.
The FRS-R-125 is CE Marked, indicating conformity with European safety standards. It is part of the RK5 class family designed for industrial protection schemes in compliant power systems. For additional compliance checks, Eaton’s RoHS tooling and datasheets offer guidance on broader environmental standards.
With a non-indicating design, routine visual checks are minimized, and the time-delay characteristic reduces nuisance trips during startup transients. This lowers maintenance interventions, increases uptime, and simplifies stock management since replacements are sized to standard RK5 footprints and amperages.