Eaton Bussmann KWN-R-6 Limitron Class RK1 Fast-Acting Fuse 6A 250V
The Eaton Bussmann KWN-R-6 is a fast-acting Limitron™ current-limiting fuse from the KWN-R series. UL Listed Class RK1, rated at 6A / 250Vac/dc with interrupting ratings of 200kA AC and 20kA DC. Suitable for branch circuit protection and equipment protection applications requiring a high-interrupting-rated, current-limiting fast-acting fuse. RoHS compliant.
Key Features
- Fast-Acting — Responds quickly to overloads and short circuits for precise equipment protection
- Current Limiting — Class RK1 — Limits the let-through energy during fault conditions to protect downstream components
- High Interrupting Rating — 200kA AC / 20kA DC for use in high-fault-current environments
- 250Vac/dc Rated — Suitable for AC and DC applications up to 250V
- UL Listed
- RoHS Compliant
Specifications
- Manufacturer: Eaton / Bussmann
- Series: KWN-R
- Part Number: KWN-R-6
- Ampere Rating: 6A
- Voltage Rating: 250Vac/dc
- Class: RK1
- Speed: Fast Acting
- Interrupting Rating: 200kA AC / 20kA DC
- Approvals: UL Listed, RoHS
- Weight: 0.4 lb
Download Product Datasheet (PDF)
Frequently Asked Questions
What does Class RK1 mean for a fuse?
Class RK1 is a UL fuse classification indicating a current-limiting, rejection-type fuse with a high interrupting rating (up to 200kA AC). The RK1 designation also means the fuse has a rejection feature that prevents it from being installed in holders designed for lower-rated fuse classes, reducing the risk of improper substitution. RK1 fuses provide tighter current-limiting characteristics than RK5 fuses of the same ampere rating.
What is the difference between fast-acting and time-delay fuses?
Fast-acting fuses open quickly in response to both overloads and short circuits, with little tolerance for temporary current surges. They are well-suited for protecting resistive loads and sensitive electronic equipment where sustained overcurrent events must be interrupted immediately. Time-delay (slow-blow) fuses tolerate brief inrush currents — such as motor starting — before opening, making them better suited for motor and transformer applications.
Is this fuse rated for DC applications?
Yes — the KWN-R series is rated for both AC (250Vac) and DC (250Vdc) applications, with an interrupting rating of 200kA AC and 20kA DC. Always confirm the DC voltage and fault current levels of your specific application are within the fuse’s rated limits before installation.
Where can I find the full product datasheet?
The full Eaton Bussmann KWN-R / KWS-R series product specification datasheet is available for download via the link above.