Eaton FNQ-1/4 Fuse - Time-delay, 10 kAIC at 500 Vac
Part Number: FNQ-1/4
Quick Summary
The Eaton FNQ-1/4 fuse provides time-delay overcurrent protection for motor control circuits and industrial equipment. This design addresses nuisance trips during motor startup and inrush events, reducing downtime and maintenance costs. It is CE-marked and RoHS compliant, meeting European regulatory requirements and supporting sustainable electrical installations. With a 0.25 A rating and a 10 kAIC interrupt capability at 500 V, it safely shields downstream transformers and drives. The ferrule-end connections and nickel-plated bronze endcaps provide reliable, vibration-resistant terminations, while the standard packaging simplifies stocking and replacement. In short, the FNQ-1/4 fuse combines protection, compliance, and easy integration to help engineers optimize uptime and total cost of ownership.
Product Information
Extended Description
FNQ-1/4 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 0.25 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-1/4
UPC
051712786010
EAN
5027590449915
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
0.25 A
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
Special features
Non-indicating
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - FNQ-1/4
FNQ-1/4~FNQ-1-4~BUSS MIDGET FUSE
Time-delay protection enables the FNQ-1/4 fuse to withstand short inrush currents typical of motor starts, reducing nuisance trips and unplanned downtime. Feature ā Business Impact ā Application: The time-delay characteristic minimizes disruption in conveyor, pump, and motor control transformer circuits, improving equipment uptime and operator productivity in demanding industrial environments. Long-term cost of ownership is lowered by fewer fuse replacements and less panel rework during commissioning. Compatibility with ferrule-end terminations and nickel-plated endcaps ensures robust connections even in vibration-prone panels, translating to reliable fault clearance and reduced maintenance overhead in OEM builds and retrofit projects. The 0.25 A rating paired with a 10 kAIC interrupt capacity at 500 V delivers safe, predictable protection for small control circuits while meeting common European and global standards. This device fits seamlessly into standard 500 V control panels, simplifying stocking and field service.
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FAQs
FNQ-1/4 uses ferrule-end x ferrule-end connections, a common and reliable termination suitable for panel boards and motor control circuits. This design supports quick, secure crimp connections that tolerate vibration, reducing field installation time and rework. For assemblies with ferrule terminals, ensure correct ferrule sizes are used and crimp tools meet the manufacturer's specifications to maintain integrity under load.
The FNQ-1/4 fuse is rated at 0.25 A and provides an interrupt rating of 10 kAIC at 500 V. This combination offers reliable short-circuit protection for small-control circuits while safely interrupting high-energy faults. It is well-suited for motor control circuits, transformers, and devices with inrush currents within a 500 V rated system.
Yes. The FNQ-1/4 fuse is CE marked and RoHS compliant, aligning with European regulatory requirements for electrical protection devices. This ensures regulatory acceptance in European-built panels, reduces compliance risk, and supports sustainable manufacturing practices across industrial facilities in the region.
Recommended for motor control circuits, inrush-heavy drives, and transformer protection, especially where 0.25 A protection and 500 V operation are appropriate. Its time-delay characteristic handles startup surges without nuisance trips, making it suitable for conveyors, pumps, and small drives in manufacturing or processing environments.
Time-delay protection minimizes nuisance trips during motor start-up, reducing unnecessary fuse replacements and panel access downtime. Over time this translates to lower maintenance labor hours, fewer unscheduled outages, and faster commissioning of new or updated equipment, delivering a measurable return on investment in high-demand production lines.