Eaton KTN-R-25 Fuse - Class RK1, 25 A, 250 V
Part Number: KTN-R-25
Quick Summary
Eaton KTN-R-25 fuse is a fast-acting Class RK1 current-limiting device designed to protect electrical circuits in industrial control panels. Selecting the right fuse can be challenging due to nuisance trips, undersized interrupting ratings, and compatibility concerns with existing Bussmann series inventories. This part delivers a 25 A rating at 250 V with a 200 kA interrupting rating, ferrule-end connections, and a durable melamine glass tube for reliable operation. While the datasheet notes Class RK1 and features like 70/30 brass end caps, there are no explicit CE, SIL, or IP certifications listed in this data. For panel builders, this provides a familiar, standards-aligned protection solution that supports easy maintenance and consistent inventory across facilities.
Product Information
Extended Description
KTN-R-25 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 25 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-25
UPC
051712407069
EAN
5027590446150
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.15 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
25 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: Fast-acting, current-limiting RK1 fuse design. Business Impact: Reduces arc energy and fault damage, promoting equipment longevity and safer startup in Power Distribution and Control Panels. Application: Ideal for industrial control panels and motor starters where quick fault isolation matters. The result is lower downtime and improved line efficiency. Feature: 25 A at 250 V rating. Business Impact: Aligns with common branch circuit protections, minimizing nuisance trips while ensuring reliable circuit protection. Application: Suitable for a wide range of modular control cabinets and machine enclosures. Feature: Ferrule end x ferrule end connections and compact 2 in length. Business Impact: Easy retrofit and replacement in standard fuse holders, reducing maintenance time and risk of improper installs. Application: Streamlines swap-out in existing Bussmann-based architectures. Feature: 70/30 brass end caps. Business Impact: Enhanced connection reliability and thermal performance, reducing contact resistance over time. Application: High-vibration environments and dense panel layouts. Feature: 200 kA interrupting rating at 250 Vac. Business Impact: High fault-current tolerance improves upstream coordination and protects upstream devices. Application: Heavy machinery and high-current panels where fault currents can spike. Feature: Class RK1 classification. Business Impact: Clear, proven protection category used across industrial automation, easing stocking and cross-referencing with other Bussmann-series parts. Application: OEM equipment, machine guards, and PLC-based control systems. Industry context: This fuse aligns with typical industrial protection strategies, supporting predictable maintenance cycles and inventory optimization.
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FAQs
The KTN-R-25 uses ferrule-end connections, is 2 inches long, and 0.56 inches wide and high. It fits standard Bussmann-series fuse holders, enabling straightforward swap-outs in existing panels. Its ferrule-end design supports reliable, high-contact integrity even in vibration-prone environments.
KTN-R-25 is rated for 25 A at 250 V with a 200 kA interrupting rating. As a Class RK1, it provides fast-acting, current-limiting protection suitable for branch circuits in industrial equipment, minimizing fault energy and protecting downstream devices.
Yes. Its fast-acting, current-limiting behavior, combined with a high interrupting rating, makes it well-suited for motor starters and motor drive protection in industrial panels, where rapid fault isolation reduces downtime and arc energy.
The datasheet specifies Class RK1 and electrical ratings (25 A, 250 V, 200 kA). It does not list CE, SIL, or IP certifications. For regulatory compliance, verify the part against your local standards and consult the included Bussmann data sheets or Eaton catalogs for any additional certifications.
The KTN-R-25 uses a standard ferrule-end design and is part of the widely used Bussmann-series family, simplifying spare parts stocking and replacements. Its reliability and high interrupting rating help reduce unplanned downtime, protect equipment, and lower total cost of ownership over the panel’s life cycle.