Eaton KTN-R-45 Fuse - Class RK1 for Industrial Panels
Part Number: KTN-R-45
Quick Summary
The Eaton KTN-R-45 fuse is a fast-acting current-limiting device designed for branch circuit protection in industrial control panels. This helps minimize damage from short circuits and nuisance overloads that can stall production and extend downtime. For users evaluating certifications, review the RK1-class fuse data sheet (no. 1043) and use the RoHS verification tool to confirm compliance. With a compact footprint and reliable Bussmann RK1 compatibility, it delivers both space efficiency and consistent protection, supporting safer, longer-lasting electrical distribution in harsh industrial environments while aligning with operational efficiency goals and maintenance planning.
Product Information
Extended Description
KTN-R-45 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 45 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-45
UPC
051712407106
Product Length/Depth
3 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.9 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
45 A
Voltage rating
250 V
Number of elements
1
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
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
Feature: Fast-acting, current-limiting RK1 fuse. Business Impact: Reduces arc energy during faults, protecting wiring insulation and reducing downtime. Application: Ideal for branch circuits in industrial control panels where quick interruption of fault current is critical. Feature: High interrupting rating of 200 kA at 250 VAC. Business Impact: Supports protection for high fault currents without nuisance tripping, improving line reliability. Application: Suitable for panels with heavy loads and critical equipment. Feature: Rejection style and non-indicating design. Business Impact: Minimizes misinsertion risk and simplifies safe maintenance in crowded enclosures. Application: Replacements in compact control cabinets and switchgear. Feature: Compact footprint (3 in length, 0.81 in width, 0.81 in height) and weight (0.9 lb). Business Impact: Saves panel space and eases installation or retrofits in limited enclosures. Application: Retrofit of legacy RK1 holders and new panel builds. Feature: 45 A, 250 V rating within Class RK1. Business Impact: Delivers targeted protection for standard 240 V systems and common automation circuits, optimizing uptime and component life. Application: Distribution blocks, motor controls, and control panels in manufacturing environments.
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FAQs
The KTN-R-45 is a 45 A, 250 V Class RK1 fast-acting, current-limiting fuse with a 200 kA interrupting rating. It is designed for standard RK1 holders and a 3 inch long footprint, making it suitable for compact industrial control panels. When selecting, verify the system’s fault current, voltage, and the RK1 compatibility to ensure reliable protection and easy replacement in typical automation environments.
Key ratings include a 45 A current rating, 250 V operating voltage, Class RK1 designation, 200 kA interrupting rating at 250 VAC, and a fast-acting, current-limiting profile. These specs support protection for medium-load industrial circuits, helping minimize damage from short circuits while maintaining control system performance and safety.
Yes, with a 200 kA interrupting rating at 250 VAC, the KTN-R-45 is designed to interrupt large fault currents quickly, protecting conductors and equipment in high-short-circuit scenarios. It’s appropriate for industrial panels where reliable fast-acting protection is essential to protect downstream components and reduce downtime.
The fuse measures 3 inches in length with a width and height of 0.81 inches, and weighs about 0.9 pounds, fitting standard RK1 fuse holders. Its rejection style design helps prevent mis-insertion during maintenance, improving install reliability in tight, crowded enclosures common in industrial automation environments.
Documentation is available through Eaton’s Bussmann resources: the Bussmann Full Line Catalogs and the data sheet no. 1043 for KTN-R, plus a RoHS verification tool. You can also access the Bussmann Fuseology video for practical installation tips and maintenance guidance, aiding informed sourcing and compliance checks.