Eaton KTN-R-20 Fuse - 200 kA @ 250V Class RK1
Part Number: KTN-R-20
Quick Summary
The Eaton Bussmann KTN-R-20 fuse is a fast-acting current-limiting device that protects low-voltage circuits in motor control panels and power distribution blocks. Engineers often wrestle with nuisance trips, performance gaps, and downtime when protection is either too slow or not matched to the load. This model uses Class RK1 construction and delivers a 200 kA interrupting rating at 250 V, with ferrule-end connections and a compact 2-inch form factor. While the datasheet notes Not Applicable for warranty and compliance, the device is designed for reliable protection in standard Bussmann fuse holders, minimizing replacement time and field service calls. For panel builders and procurement teams, its small footprint and robust end-cap design translate to faster installs and better uptime in rugged industrial environments.
Product Information
Extended Description
KTN-R-20 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 20 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-20
UPC
051712407052
EAN
5027590446136
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.048 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
20 A
Voltage rating
250 V
Material
Melamine glass tube
Number of elements
1
Packaging type
Standard
Class
Class RK1
Connection
Ferrule end x ferrule 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
Feature: Class RK1, fast-acting current-limiting protection → Business Impact: Precise fault interruption reduces arc energy and downstream damage, improving equipment longevity and service intervals. Application: Motor drives, power distribution panels, and control cabinets. Long-tail keywords: Class RK1 fuse, fast-acting RK1 protection, industrial control fuses.Feature: 200 kA interrupting rating at 250 V → Business Impact: High fault tolerance for serious short-circuit events, lowering system-wide risk and potential repair costs. Application: Heavy-duty machinery and critical power circuits. Long-tail keywords: high interrupting rating fuses, 250 V industrial fuses, short-circuit protection.Feature: 20 A amperage rating and 250 V voltage rating → Business Impact: Suitable protection for common low-voltage circuits while allowing normal operating current without nuisance trips. Application: Panel protection for electrical assemblies and equipment wiring. Long-tail keywords: 20 A fuses, 250 V protection fuses, low-voltage circuit protection.Feature: Ferrule end x ferrule end with 70/30 brass end caps → Business Impact: Reliable contact quality and easy insertion/removal in standard fuse holders; durable under vibration and temperature cycling. Application: Rejection-style, replace-in-place installations in compact panels. Long-tail keywords: ferrule end fuses, brass end caps, easy install protection fuses.Feature: Melamine glass tube, 1 element, 2 in length, non-indicating → Business Impact: Compact footprint with predictable performance; status indication not required in this design, lowering panel complexity. Application: Space-constrained control cabinets. Long-tail keywords: melamine glass fuse, 2 inch fuse, non-indicating fuse.Feature: Standard packaging and compatibility with Bussmann-series holders → Business Impact: Streamlined procurement and interchangeability, reducing spare-part SKUs and obsolescence risk. Application: Enterprise-wide fuse standardization. Long-tail keywords: Bussmann series compatibility, standard fuse packaging, interchangeability.
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FAQs
KTN-R-20 uses ferrule end connections (ferrule end x ferrule end) and is designed to fit standard Bussmann-series fuse holders in RK1 protection schemes, ensuring straightforward replacement and compatibility with common control panels.
The fuse provides a 20 A amperage rating, 250 V voltage rating, and a robust 200 kA interrupting rating at 250 VAC, making it suitable for short-circuit protection in low-voltage industrial circuits.
Yes. Its fast-acting current-limiting design, Class RK1 construction, and high interrupting rating align with typical motor control-panel protection requirements while helping minimize nuisance trips and downtime.
The datasheet notes Warranty: Not Applicable and Compliances: Not Applicable for this part. Always verify your project’s regulatory needs in case additional certifications are required for your application.
The fuse is 2 inches long with 0.56 inches in width and height and weighs 0.048 lb, making it suitable for compact control cabinets and space-constrained installations.