Eaton KWS-R-20 Fuse - Class RK1, 20A, 600 Vac/600 Vdc
Part Number: KWS-R-20
Quick Summary
The Eaton KWS-R-20 fuse provides overcurrent protection for photovoltaic systems and panelboards. Engineers face nuisance trips and compatibility gaps as PV and DC/AC networks expand, impacting uptime and project costs. With CE marking and Class RK1 designation, this fuse delivers reliable performance, including high interrupt ratings of 200 kAIC at 600 Vac and 100 kAIC at 600 Vdc to handle fault currents. Its ferrule-end connections and non-indicating body simplify field wiring, while the compact 5 in form factor supports dense electrical layouts. In practice, the KWS-R-20 integrates smoothly with Eaton Bussmann protection schemes, helping manufacturers and installers meet safety standards while reducing installation time and lifecycle costs.
Product Information
Extended Description
KWS-R-20 Eaton: Eaton Bussmann series KWS-R fuse, Photovoltaic systems, Inverters, Panelboards, 20 A, Class RK1, Non-indicating, Ferrule end x ferrule end, 100 kAIC at 600 Vdc, 200 kAIC at 600 Vac, Standard
Product Name
Eaton Bussmann series KWS-R fuse
Catalog Number
KWS-R-20
UPC
051712658782
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.13 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
20 A
Interrupt rating
200 kAIC at 600 Vac 100 kAIC at 600 Vdc
Voltage rating
600 Vac, 600 Vdc
Packaging type
Standard
Class
Class RK1
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - KWS-R-20
Feature: 20 A amperage rating paired with Class RK1 classification enables precise protection for PV inverters and panelboards. Business Impact: Reduces nuisance trips and protects critical power electronics, lowering maintenance costs. Application: Suitable for PV arrays and distributed energy systems requiring reliable DC and AC protection. Feature: 600 Vac / 600 Vdc voltage rating and high interrupt ratings up to 200 kAIC at 600 Vac and 100 kAIC at 600 Vdc. Business Impact: Handles high fault currents, improving system safety and downstream equipment life. Application: PV power conversion stages and commercial/industrial electrical distribution. Feature: Ferrule-end x ferrule-end connections with a compact 5 in length. Business Impact: Simplifies wiring, speeds installation, and enables secure, vibration-resistant terminations. Application: Administrative and field-fuse blocks in tight electrical cabinets. Feature: Non-indicating fuse body with standard packaging. Business Impact: Reduces maintenance overhead by avoiding indicators that can fail in harsh environments; supports straightforward replacement. Application: Retrofit projects and new builds in space-constrained panels. Feature: CE Marked compliance and class RK1 designation. Business Impact: Ensures regulatory alignment and predictable performance within European markets and global PV protection strategies. Application: Designing compliant protection schemes for rooftop and industrial PV installations.
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FAQs
The KWS-R-20 uses ferrule-end terminations designed for straightforward insertion into compatible fuse blocks. Verify a 20 A rating matches the circuit, align ferrule ends with the block’s terminals, and secure using standard mounting hardware. Ensure the block supports RK1-class fuses and observe the 5 inch body length for clearance within the enclosure.
The KWS-R-20 is rated at 20 A with a voltage rating of 600 Vac and 600 Vdc. It provides interrupt ratings of up to 200 kAIC at 600 Vac and 100 kAIC at 600 Vdc, enabling robust fault current protection for mixed AC/DC PV circuits and related protection schemes.
Yes. The KWS-R-20 is designed for photovoltaic systems, inverters, and panelboards, offering high-current protection for both DC and AC portions of PV installations. Its 600 Vdc rating and RK1 class make it a reliable choice for solar energy protection needs.
The KWS-R-20 carries CE marking and is classified as Class RK1. This combination assures alignment with European safety standards and aligns with Bussmann’s protection-series guidelines for reliable fuse operation in PV and general electrical protection.
The fuse’s compact design, ferrule-end wiring, and non-indicating body simplify routine replacements and field servicing, reducing downtime. High interrupt ratings protect downstream equipment, potentially lowering repair costs and extending system reliability, contributing to favorable total cost of ownership for PV and commercial electrical installations.