Eaton KTN-R-350 Series Fuse - Class RK1, 200 kAIC

Part Number: KTN-R-350
Manufacturer
Eaton
Part number
KTN-R-350

Quick Summary

The Eaton KTN-R-350 fuse provides fast-acting overcurrent protection for power distribution panels. Engineers often struggle with nuisance trips and slow fault isolation in demanding industrial cabinets, especially where high fault currents can occur. While the data sheet notes a Class RK1 designation and high interrupt ratings, it does not list CE, SIL, or IP certifications—verify local compliance for your application. Designed to integrate with Bussmann series protection schemes, this device supports reliable procurement, standardized replacements, and consistent protection across panels, helping maintain uptime and predictable maintenance cycles in harsh manufacturing environments.

Product Information

Extended Description

KTN-R-350 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 350 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac and 100 kA at 250 Vdc
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-350
UPC
051712407243
Product Length/Depth
8.63 in
Product Height
2.06 in
Product Width
2.06 in
Product Weight
1.94 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
350 A
Interrupt rating
200 kAIC at 250 Vac 100 kAIC at 250 Vdc
Voltage rating
250 Vac, 250 Vdc
Number of elements
1
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Feature → Business Impact → Application: Class RK1, fast-acting, current-limiting design provides selective protection and rapid fault clearance, reducing damage to downstream equipment and minimizing downtime in critical lines. This translates to improved line uptime and lower unplanned maintenance costs in assembly plants and packaging lines. Application: power distribution panels and industrial control cabinets where space and reliability are paramount. Feature → Business Impact → Application: 350 A amperage rating with a 200 kAIC at 250 Vac and 100 kAIC at 250 Vdc interrupt rating enables robust protection for high-current loads, such as motors and drives, while supporting selective tripping and safe fault isolation. Application: motor feeders and high-load circuits in manufacturing facilities. Feature → Business Impact → Application: rejection-style fuse class prevents incorrect installation and ensures proper orientation inside panel boards, reducing mis-seating risks and service calls. Application: standard RK1 fuse holders in control panels. Feature → Business Impact → Application: physical footprint of 8.63 in length with 2.06 in width and 2.06 in height, weight 1.94 lb, fits within common enclosure spaces and minimizes retrofit challenges. Application: retrofit projects and new panel builds with limited mounting depth. Feature → Business Impact → Application: part of the Eaton Bussmann Series enables procurement efficiency and catalog compatibility across sites, simplifying sourcing and cross-reference workflows. Application: centralized purchasing and long-term maintenance programs in multi-plant operations.

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FAQs

The KTN-R-350 is a fast-acting, current-limiting Class RK1 fuse from Eaton’s Bussmann series, rated at 350 A with a 200 kAIC interrupt rating at 250 Vac and 100 kAIC at 250 Vdc. It is commonly used in power distribution panels and industrial control cabinets to protect high-current circuits and enable quick fault isolation.
Yes. The KTN-R-350 is a Class RK1 fuse designed to integrate with standard RK1 holders used in Bussmann series protection schemes. For procurement and cross-referencing, consult the Bussmann Full Line Catalogs and ensure proper panel compatibility during installation.
The fuse provides 350 A ratings with an interrupt rating of 200 kAIC at 250 Vac and 100 kAIC at 250 Vdc, and a voltage rating of 250 Vac / 250 Vdc. This enables reliable protection for high-current, low-voltage applications in industrial environments.
The provided data does not list CE, SIL, or IP certifications for the KTN-R-350. Users should verify regulatory compliance with Eaton datasheets or regional approvals before usage in regulated environments.
Best-fit for power distribution panels, motor drives, and industrial control cabinets, the KTN-R-350 should be mounted in standard RK1 fuse holders. Its rejection-style design reduces mis-installation, and its dimensions—8.63 in length, 2.06 in width, 2.06 in height—facilitate straightforward retrofits and panel space planning.