Eaton FNQ-6-1/4 Fuse - 10 kAIC at 500 Vac
Part Number: FNQ-6-1/4
Quick Summary
The Eaton FNQ-6-1/4 fuse provides time-delay protection for motor control circuits with inrush currents. This helps prevent nuisance trips during startup, keeping critical loads online and reducing unplanned downtime. The device is CE marked and RoHS compliant, signaling adherence to essential safety and environmental standards. With a 6.25 A rating, 500 V maximum, and a 10 kAIC interrupt capability, it delivers robust protection for motors, transformers, and control panels while supporting efficient, compliant protection strategies. Its ferrule-end construction and nickel-plated endcaps simplify installation in common panel and wiring configurations, helping maintenance teams stock and deploy reliably across industrial facilities.
Product Information
Extended Description
FNQ-6-1/4 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 6.25 A, Non-indicating, Ferrule end x ferrule end, 10 kAIC at 500 Vac, Nickel-plated bronze endcap, Standard, 500 V
Product Name
Eaton Bussmann series FNQ fuse
Catalog Number
FNQ-6-1/4
UPC
051712786317
EAN
5027590450041
Product Length/Depth
0.41 in
Product Height
1.5 in
Product Width
0.41 in
Product Weight
0.175 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
6.25A
Interrupt rating
10 kAIC at 500 Vac
Voltage rating
500 V
Material
Nickel-plated bronze endcap
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - FNQ-6-1/4
FNQ-6-1/4~FNQ-6-1-4~BUSS MIDGET FUSE
Feature: Time-delay design enables the FNQ-6-1/4 fuse to tolerate motor and transformer inrush without tripping. Business impact: reduces nuisance trips, lowers maintenance costs, and improves machine uptime in push-button start cycles. Application: suitable for motor control circuits, transformer protection, and other inrush-heavy loads in control panels. Feature: Amperage rating of 6.25 A and voltage rating of 500 V with an interrupt rating of 10 kAIC. Business impact: provides reliable short-circuit and overload protection for equipment in harsh industrial environments. Application: motor starters, power distribution panels, and feeder circuits. Feature: Ferrule end x ferrule end connections and nickel-plated bronze endcaps. Business impact: durable, low-resistance terminations that resist corrosion and vibration, reducing maintenance and contact wear. Application: panel-mounted fuses in standard fuse blocks and Bussmann FNQ series accessories. Feature: Non-indicating fuse with standard packaging. Business impact: simplifies large-scale stocking and procurement in maintenance inventories; note that external indication may require auxiliary monitoring. Application: general-purpose protection where visual status is not required. Feature: CE Marked and RoHS compliant specifications documentation. Business impact: supports regulatory compliance and environmental responsibility across global operations. Application: essential for OEMs and contractors delivering industrial electrical protection solutions.
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FAQs
The FNQ-6-1/4 uses ferrule-end terminations and nickel-plated endcaps, designed for standard fuse holders and Bussmann FNQ accessories. Ensure compatible panel space, proper ferrule sizing, and adequate clearance for 500 V operation. Verify that the chosen fuse holder supports a 10 kAIC interrupt rating to maintain protection integrity during faults.
Key specs include a 6.25 A amperage rating, 500 V voltage rating, and a 10 kAIC interrupt rating. These values ensure effective protection for motor control circuits and transformers while tolerating inrush currents common in starting conditions, reducing nuisance trips and maintaining uptime.
Yes. The time-delay design of FNQ-6-1/4 is specifically intended to handle inrush currents without tripping, making it appropriate for motor starters, transformers, and other startup-heavy loads in industrial panels.
The FNQ-6-1/4 is CE marked and RoHS compliant, aligning with European safety requirements and environmental standards, while supporting global deployments in regulated markets.
By reducing nuisance trips and enabling reliable protection, this fuse lowers unplanned downtime and maintenance costs. Its robust construction and standard packaging simplify stocking, improving procurement efficiency and long-term return on investment in medium-power, inrush-prone applications.