Eaton KTN-R-450 Fuse - Class RK1, 200 kAIC at 250 Vac
Part Number: KTN-R-450
Quick Summary
Eaton KTN-R-450 fuse protects electrical circuits in industrial power distributions, delivering fast-acting current-limiting protection for panel assemblies. Too often, downtime results from aging protection devices that trip unpredictably or fail to clear faults quickly. The data shows Class RK1 construction with a 450 A rating and an interruption capability of up to 200 kAIC at 250 Vac, plus 100 kAIC at 250 Vdc. Formal CE, SIL, or IP certifications are not listed in the provided spec, so confirm regulatory compliance with your internal standards. By choosing this fuse, engineers gain reliable protection with a compact form factor that supports easy installation, reduces panel congestion, and simplifies maintenance planning.
Product Information
Extended Description
KTN-R-450 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 450 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-450
UPC
051712407267
Product Length/Depth
10.38 in
Product Height
2.59 in
Product Width
2.59 in
Product Weight
3.25 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
450 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
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series KTN-R 250 V Class R fuse data sheet no. 1043
Fast-acting, current-limiting protection reduces fault energy, enabling quicker safe shutdowns and safeguarding critical electrical equipment in industrial panels. This translates to lower downtime, fewer arc-flash events, and enhanced uptime for manufacturing lines. The 450 A amperage rating paired with a 200 kAIC at 250 Vac interruption rating delivers robust short-circuit handling for feeders and distribution networks in harsh plant environments. Rejection-style construction prevents incorrect insertion, which minimizes installation errors during field service and OEM assemblies. The compact 10.38 in length and 2.59 in width/height footprint supports tight panel layouts and easier mounting in standard enclosures, while 1-element design simplifies fixture replacement and inventory management. With 250 Vac / 250 Vdc voltage ratings, it supports both AC and DC circuits common in modern control systems.
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FAQs
KTN-R-450 is a 1-element, fast-acting Class RK1 fuse designed for standard Bussmann RK1 installations. It fits typical industrial panelboards, motor control centers, and power distribution units that use RK1 style fuses. Ensure mounting clearance and alignment with standard contactor/fuse blocks and verify that the enclosure can accommodate its 10.38 inch length and 2.59 inch width.
The KTN-R-450 provides a 450 A amperage rating with an interrupt rating of 200 kAIC at 250 Vac and 100 kAIC at 250 Vdc. The voltage rating is 250 Vac / 250 Vdc, making it suitable for both AC and DC protection in industrial power systems.
Yes. With its high interrupt capability and current-limiting action, the KTN-R-450 is well-suited for motor control centers, panelboards, and power distribution units in manufacturing environments. Its RK1 class and current-limiting design help minimize fault energy and protect upstream equipment during short circuits.
The provided data does not list CE, SIL, or IP certifications. It specifies Class RK1, 450 A, and high interrupt ratings, but you should verify regulatory compliance with Eaton datasheets or through your internal compliance team before use in regulated applications.
The KTN-R-450 offers predictable, fast protection with a non-indicating, rejection-style design that reduces misinsertions and service errors. Its robust interrupt ratings help minimize downtime during fault events, while its standard packaging and 1-element construction streamline replacements and inventory control, contributing to lower lifecycle costs and easier maintenance planning.