Eaton FWH-020A6F High Speed Fuse - UL Recognized
Part Number: FWH-020A6F
Quick Summary
The Eaton FWH-020A6F high-speed fuse protects DC and AC circuits in industrial power distribution and control panels. This helps engineers avoid outages caused by slow fusing during short circuits. UL Recognized, CSA Certified, and CE Marked, this device meets critical safety standards while supporting global deployments. Its compact ferrule-end design and low watt losses contribute to reliable protection without adding heat or wiring complexity, delivering measurable uptime and cost savings for modern automation installations. With a 20A RMS rating and a 500 Vac/dc capability, it covers a wide range of mid-power applications, while a 50 kAIC interrupt rating at 0.25-20A and 20 kAIC at 25-30A provides a robust safety margin across diverse fault conditions.
Product Information
Extended Description
FWH-020A6F Eaton: Eaton Bussmann series FWH high speed fuse, DC common bus, 20A RMS (200% minimum opening current at rated voltage), 50 kAIC at 0.25-20A, 20 kAIC at 25-30A, Ferrule end X ferrule end, Standard
Product Name
Eaton Bussmann series FWH high speed fuse
Catalog Number
FWH-020A6F
UPC
051712796729
EAN
5027590061186
Product Length/Depth
1.25 in
Product Height
0.25 in
Product Width
0.25 in
Product Weight
0.4 lb
Warranty
Not Applicable
Compliances
CE Marked
Certifications
UL Recognized CSA Certified
Amperage Rating
20A RMS (200% minimum opening current at rated voltage)
Interrupt rating
50 kAIC at 0.25-20A 20 kAIC at 25-30A
Voltage rating
500 Vac/dc (35-800 A only)
Watt losses
4.26 W
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non Indicating
Eaton Specification Sheet - FWH-020A6F
Bussmann series FWH 6x32mm high speed fuse data sheet no. 720038
Bussmann series FWH 6x32mm high speed fuse data sheet no. 720038
Datasheet - FNQ-30
The FWH-020A6F is a high-speed fuse designed to rapidly clear faults on DC common buses and AC power rails. This fast response reduces fault energy and protects power electronics, drives, and control circuits, delivering a measurable improvement in system uptime. With a 20A RMS rating and a 500 Vac/dc voltage rating, it supports mid-power applications while maintaining a safe margin for surge events. The device provides 50 kAIC interrupt rating from 0.25 to 20A and 20 kAIC at 25-30A, enabling robust protection across fault conditions. Ferrule-end terminations (ferrule end x ferrule end) simplify installation and ensure vibration-resistant connections in harsh industrial environments. The compact 1.25 in length and 0.25 in height/width profile enable dense panel layouts and straightforward replacement in aging equipment. UL Recognized, CSA Certified, and CE Marked, this fuse supports global compliance programs and streamlines supplier qualification for multinational installations. By meeting established safety standards, it reduces risk during audits and accelerates time-to-commissioning. Low watt losses of 4.26 W help minimize cabinet heat and cooling loads, while a non-indicating fuse indicator reduces nuisance trips in busy automation environments. Standard packaging and a 0.4 lb weight make stocking predictable and service-friendly for maintenance teams.
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FAQs
Yes. The FWH-020A6F uses ferrule-end terminations and is designed for DC common bus protection in industrial power-distribution schemes. It can be substituted into panels that already use Bussmann FWH fuses, subject to proper sizing per the datasheet and Eaton installation guidance.
The fuse provides a 20A RMS current rating with a 500 Vac/dc voltage rating, and an interrupt rating of 50 kAIC from 0.25-20A and 20 kAIC from 25-30A. Watt losses are approximately 4.26 W, with a non-indicating fuse indicator.
Ideal for DC common bus protection in industrial power supplies, motor drives, PLC panels, and control cabinets where fast fault clearance and reliable protection are critical to minimize downtime.
UL Recognized, CSA Certified, and CE Marked, providing regulatory alignment for North American and European markets. These approvals simplify compliance, audits, and cross-border procurement for multinational manufacturing ecosystems.
Low watt losses and compact form factor reduce heat and footprint in cabinets, lowering cooling costs and enabling denser layouts. Global datasheets and application notes from Eaton and Bussmann support correct sizing, fast replacements, and faster time-to-value in automation projects.