Eaton FNQ-4 Fuse - Time-delay 4A, 500V with CE RoHS
Part Number: FNQ-4
Quick Summary
FNQ-4 fuse provides time-delay overcurrent protection for motor control circuits with inrush. That inrush can trip standard protections, causing downtime and costly maintenance. It carries CE Marking and RoHS compliance, aligning with global safety and environmental standards. Its ferrule-end connections and non-indicating design simplify installation in standard panels. With a 4 A rating at 500 V and a 10 kAIC interrupt capacity, it protects automation systems while boosting uptime. Engineers value the Bussmann series compatibility, reliable sourcing, and predictable performance across automated lines.
Product Information
Extended Description
FNQ-4 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 4 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-4
UPC
051712786041
EAN
5027590060547
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
4 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 complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - FNQ-4
Datasheet - FNQ-30
Time-delay design enables the FNQ-4 to tolerate short inrush currents without nuisance trips. This delivers measurable uptime gains in motor-start applications, reducing unplanned downtime and maintenance costs. It's particularly well suited for motor starters, conveyors, and pumps in automation systems. With a 10 kAIC interrupt rating at 500 Vac, the FNQ-4 safely clears fault currents without sustaining damage. This gives designers confidence in protecting controllers, relays, and drives connected to 500 V circuits. Nickel-plated bronze endcaps provide durability and corrosion resistance in harsh industrial environments. The rugged construction supports long service life in control panels, MCCs, and equipment enclosures. Ferrule end-to-end connections ensure reliable, quick wiring in standard fuse blocks, while the standard packaging simplifies stocking and replacement in maintenance programs. CE Marked and RoHS compliant status supports global deployments and regulatory readiness. The non-indicating design reduces nuisance indicators and simplifies panel aesthetics, while keeping replacement straightforward.
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FAQs
FNQ-4 features ferrule end connections that fit into standard fuse blocks, simplifying wiring and replacement. With dimensions of 0.41 in x 0.41 in x 1.5 in and a weight of 0.175 lb, it fits common panels and MCCs. Use ferrule terminations for secure, vibration-resistant wiring in automation environments.
FNQ-4 is a 4 A, 500 V time-delay fuse with a 10 kAIC interrupt rating at 500 Vac. It uses nickel-plated bronze endcaps, ferrule-end connections, and a non-indicating design. It is packaged as Standard and aligns with CE and RoHS compliance, supporting reliable protection for inductive loads in industrial equipment.
Yes. The FNQ-4’s time-delay characteristic tolerates motor start-up surges, reducing nuisance trips in motor control centers, conveyors, pumps, and other automation equipment. This translates to higher line uptime, fewer interruptions in production, and lower maintenance costs over the lifecycle of the installation.
FNQ-4 carries CE Marking and RoHS compliance, ensuring adherence to European safety standards and environmentally responsible manufacturing. These certifications support global deployments, simplify supplier qualification, and help meet regulatory requirements across manufacturing sites and international projects.
By suppressing nuisance trips during inrush events and providing robust fault clearance, FNQ-4 reduces unplanned downtime and extends equipment life. Easy sourcing within the Bussmann series and secure ferrule-term connections also lower maintenance labor and stocking costs, delivering tangible long-term savings in automation and control applications.