Eaton KWN-R-20 Fuse - Class RK1 Non-indicating Knife Blade
Part Number: KWN-R-20
Quick Summary
KWN-R-20 fuse provides fast-acting overcurrent protection for industrial panels and motor circuits in control systems. This addresses downtime and misdiagnosis risks that come from using the wrong fuse type or unclear indicators in critical equipment. The device uses Class RK1 classification and a non-indicating design to streamline maintenance while providing consistent protection. While Eaton's Bussmann series focuses on reliable compatibility, the KWN-R-20's knife blade contact improves reliability and reduces heat in high-density layouts. For procurement teams, this fuse supports standardized stocking, traceability with UPC 051712407564, and easy cross-compatibility with RK1 holders, enabling faster parts replacement and reduced total cost of ownership in robust electrical protection strategies.
Product Information
Extended Description
KWN-R-20 Eaton: Eaton Bussmann series KWN-R fuse, 20 A, Class RK1, Non-indicating, Standard
Product Name
Eaton Bussmann series KWN-R fuse
Catalog Number
KWN-R-20
UPC
051712407564
Product Length/Depth
2 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.4 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
20 A
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Special features
Knife blade
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - KWN-R-20
Feature: 20 A amperage rating and Class RK1 design. Business impact: ensures reliable overcurrent protection for common industrial loads while aligning with standard RK1 fuse holders. Application: suitable for control panels and motor circuits in automation systems, reducing nuisance trips. Feature: Knife blade contact. Business impact: improves contact reliability and reduces heating in dense terminal blocks. Application: high-density panel layouts and equipment with tight space constraints, boosting uptime. Feature: Non-indicating fuse indicator. Business impact: minimizes visual clutter in crowded panels, lowering maintenance time and potential misreads. Application: ongoing monitoring in complex machines without extra status LEDs. Feature: Compact dimensions (2 in L x 0.56 in W x 0.56 in H). Business impact: enables space-saving retrofits and easier integration into existing fuse holders. Application: retrofit projects and new installations with limited panel depth. Feature: Standard packaging and clear cataloging (Catalog Number KWN-R-20, UPC 051712407564). Business impact: simplifies procurement, reduces stocking complexity, and improves traceability. Application: MRO and OEM supply chains seeking consistent Eaton Bussmann components.
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FAQs
KWN-R-20 is designed to fit standard RK1-class fuse holders used in many Eaton Bussmann and third-party panels. For installation, verify the holder accepts RK1 fuses with a 2 inch length and 0.56 inch width, and ensure the knife-blade contact interfaces securely with the bus bar or terminal. This compatibility minimizes retrofit complexity and downtime during panel upgrades.
The KWN-R-20 is rated for 20 A with Class RK1 characteristics, non-indicating, and features a knife blade for reliable contact. In practice, this combination provides predictable overload protection for common automation circuits, reduces resistance-related heating, and supports consistent tripping behavior under short-circuit conditions, enhancing system reliability.
KWN-R-20 serves general industrial control and panel protection needs thanks to its RK1 class design and knife-blade contact. While the data does not specify IP or CE/SIL certifications, it remains a compact, standard-protection fuse ideal for non-harsh environments or where RK1-compatible assemblies are already in place. For harsh environments, confirm applicable enclosure ratings and additional protections.
The provided spec highlights Class RK1, non-indicating indication, and standard packaging, but does not list CE, SIL, or IP certifications. To meet regulatory requirements, supplement with third-party approvals as needed and verify against your regional compliance needs. Cross-check with Eaton’s datasheet (KWN-R-20) for any updated certifications or country-specific approvals.
Using a standardized 20 A RK1 fuse like the KWN-R-20 reduces spare-part variety and simplifies procurement via the UPC 051712407564, improving inventory turns. Its knife blade design lowers contact failures, potentially reducing downtime. Overall, this can lower maintenance labor hours and spare-part carrying costs in a multi-site automation environment.