Eaton KTS-R-125 Fuse - 200 kAIC at 600 Vac, Class RK1
Part Number: KTS-R-125
Quick Summary
The Eaton KTS-R-125 Fuse provides fast-acting current protection for electrical distribution panels. Engineers rely on reliable fuses to prevent cascading faults and minimize downtime in harsh industrial environments. The KTS-R-125 is a current-limiting Class RK1 device designed to interrupt faults rapidly, protecting downstream equipment such as drives, transformers, and control circuits. It delivers a robust 125 A rating with an interrupt capacity of 200 kAIC at 600 Vac, compatible with blade-end terminations for quick panel installation. This fuse carries CE marking and RoHS compliance, aligning with EU requirements and restricted-substance policies. In practice, it integrates smoothly with Eaton Bussmann series components, offering predictable replacement parts, reduced inventory, and improved lifecycle economics for mid- to high-power applications.
Product Information
Extended Description
KTS-R-125 Eaton: Eaton Bussmann Series Class RK1 fuse, KTS-R, fast-acting, current limiting fuse, 125 A, rejection style fuse, interrupting rating of 200 kA at 600 Vac
Product Name
Eaton Bussmann series KTS-R fuse
Catalog Number
KTS-R-125
UPC
051712417174
Product Length/Depth
9.63 in
Product Height
1.5 in
Product Width
1.5 in
Product Weight
1.23 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
125 A
Interrupt rating
200 kAIC at 600 Vac
Voltage rating
600 V
Material
Melamine glass tube
Number of elements
1
Packaging type
Standard
Class
Class RK1
Connection
Blade end x blade end
Fuse indicator
Non-indicating
Special features
70/30 brass end cap
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series KTS-R 600 V Class RK1 fuse data sheet no. 1044
Feature: Fast-acting current-limiting design that quickly isolates faults. Business Impact: Minimizes arc energy and collateral damage, reducing downtime and maintenance costs. Application: Ideal for distribution panels and motor control centers in manufacturing and process facilities. Feature: 125 A amperage rating with 200 kAIC interrupt rating at 600 Vac. Business Impact: Enables safe interruption of high-energy faults without nuisance trips, protecting essential loads. Application: Critical feeders and drive circuits in medium- to high-power industrial applications. Feature: Class RK1 with blade-end x blade-end connections and a rejection-style design. Business Impact: Delivers quick, error-proof installation and reliable contact, lowering commissioning time. Application: Drop-in replacement in standard RK1 fuse holders across Bussmann series. Feature: Melamine glass tube construction with a single element. Business Impact: Offers stable thermal performance and predictable response across temperature variations, simplifying maintenance planning. Application: Widely used in control cabinets and power distribution panels. Feature: CE Marked and RoHS compliant. Business Impact: Streamlines regulatory approval and supplier qualification for EU-based projects, reducing compliance risk. Application: Procurement-ready for international deployments and standardized Eaton Bussmann lineups. Feature: Rejection-style end caps with 70/30 brass end caps. Business Impact: Improves installation reliability and contact integrity in high-vibration environments. Application: Suitable for mounting in rugged industrial enclosures and RK1 fuse blocks.
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FAQs
The KTS-R-125 uses blade-end x blade-end connections designed for RK1 fuse blocks. To install, ensure the fuse holder matches the RK1 class and that the replacement is a one-for-one equivalent. Handle with care to avoid damage to the melamine glass tube and confirm proper seating in the holder to prevent overheating and nuisance trips.
Verify amperage rating of 125 A, interrupt rating of 200 kAIC at 600 Vac, voltage rating of 600 V, Class RK1 compatibility, blade-end end connections, and the non-indicating fuse type. Also confirm CE marking and RoHS compliance to meet regulatory requirements for EU-based installations.
Yes, as a fast-acting current-limiting RK1 fuse it can protect motor circuits from severe faults. For motor start-up surges or long-duration overloads, coordinate with a suitable overload relay or time-delay fuse variant if needed to prevent nuisance trips and ensure proper motor protection.
The KTS-R-125 is CE marked and RoHS compliant, aligning with EU regulatory and environmental standards. It is part of the Class RK1 family, ensuring standardized protection behavior across Bussmann series components and simplifying cross-referencing in approved product catalogs.
A high interrupt rating reduces arc energy and fault-related damage, cutting downtime and repair costs. Standardization within the Bussmann RK1 lineup simplifies spares management, boosts replacement part availability, and delivers predictable lifecycle costs for mid- to high-power protection schemes.