Eaton KTN-R-250 Fuse - 200 kAIC at 250 Vac
Part Number: KTN-R-250
Quick Summary
Eaton KTN-R-250 fuse provides fast-acting overcurrent protection for industrial power circuits in panelboards and motor control centers. This design targets reliable fault clearing to minimize downtime during surge events. Professionals often struggle with nuisance trips and downstream equipment damage when using generic fuses, which can drive maintenance costs and downtime. Key specs include Class RK1 designation, a 250 A rating, and interrupt ratings of 200 kAIC at 250 Vac and 100 kAIC at 250 Vdc, with blade-end connections for secure, tool-free installation. By aligning with Eaton Bussmann series compatibility, you gain streamlined inventory, consistent performance data, and proven protection for critical electrical systems across plant networks.
Product Information
Extended Description
KTN-R-250 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 250 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-250
UPC
051712407229
Product Length/Depth
8.5 in
Product Height
2.06 in
Product Width
2.06 in
Product Weight
1.94 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
250 A
Interrupt rating
100 kAIC at 250 Vdc 200 kAIC at 250 Vac
Voltage rating
250 Vac, 250 Vdc
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 KTN-R 250 V Class R fuse data sheet no. 1043
Fast-acting protection minimizes damage. The KTN-R-250's fast-acting current-limiting design interrupts faults quickly, reducing arc energy and thermal stress on downstream components, which translates to lower repair costs and shorter downtime in panelboards and MCCs. High current rating and interrupt capability provide resilience against high fault currents, allowing safer operation of heavy-load drives and critical power feeds. Blade end x blade end connections and 70/30 brass end caps deliver solid, low-resistance connections that resist vibration and heat, simplifying field installation and improving long-term reliability in harsh industrial environments. Construction uses a melamine glass tube and a single-element design for consistent timing and durability, even on dusty or humid factory floors, while maintaining compatibility with Bussmann-series inventories for stocking efficiency. Installation and lifecycle planning are easier thanks to a standard 8.5 in length, 2.06 in width, and 1.94 lb weight, which support enclosure fitting and cooling considerations in busy plant environments.
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FAQs
Install the KTN-R-250 using its blade end x blade end configuration, ensuring the panel provides adequate clearance for an 8.5 inch long fuse. Use compatible Bussmann-series fuse blocks and mounting hardware, tighten ends to specification, and verify 250 Vac/dc voltage compatibility. Confirm orientation and limit vibration with the 70/30 brass end caps for reliable operation in harsh environments.
The fuse is rated 250 A with interrupt ratings of 200 kAIC at 250 Vac and 100 kAIC at 250 Vdc, providing rapid fault interruption to minimize damage. Voltage ratings cover 250 Vac and 250 Vdc, while the single-element, melamine glass tube construction ensures predictable timing. These ratings support protection for high-load industrial circuits and motor-control configurations.
Yes. The KTN-R-250 is a fast-acting Class RK1 fuse designed for panelboards and motor control centers. Its 250 A rating and high interrupt ratings make it suitable for dense electrical rooms and equipment feeders, where reliable protection and fast fault clearance reduce downtime and collateral damage while maintaining compatibility with Eaton Bussmann-series inventory.
The device is designated as Class RK1, which guides selectivity in multi-fuse panel arrangements. While specific CE/UL listings are not listed in the provided data, Eaton provides catalogs and RoHS tools to verify broader compliance. For exact certifications, consult Eaton’s official datasheets and the RoHS search tool referenced in the product materials.
The KTN-R-250 enables faster fault clearance, reducing the likelihood of downstream damage and downtime. Its compatibility with Bussmann-series components simplifies stock planning and maintenance workflows, lowering spare-part variance. The robust blade-end connections and end-cap design minimize field rework, contributing to lower total cost of ownership over equipment life cycles.