Eaton FNQ-4-1/2 Fuse - 10 kAIC at 500 Vac
Part Number: FNQ-4-1/2
Quick Summary
FNQ-4-1/2 fuse from Eaton Bussmann protects motor control circuits with inrush tolerance, delivering predictable trips and steady operation in demanding panels. Too many startups trip on nuisance opens, leading to downtime and missed production windows, increasing maintenance costs and impacting overall equipment effectiveness. It carries CE marking and RoHS compliance, aligning with European and global safety standards across industries. Engineered for 500 V control panels and a 4.5 A protection level, it delivers reliable interrupt performance while staying compatible with standard ferrule-end terminations. Selecting this time-delay fuse improves uptime, reduces spare-part costs, and simplifies regulatory approvals for modern industrial applications.
Product Information
Extended Description
FNQ-4-1/2 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 4.5 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-4-1/2
UPC
051712786287
EAN
5027590407663
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
4.5A
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-4-1/2
FNQ-4-1/2~FNQ-4-1-2~BUSS MIDGET FUSE
FNQ-4-1/2 fuse combines a purposeful design with practical benefits for industrial panels. Feature → Business Impact → Application: Time-delay characteristics tolerate motor-start surges without compromising protection, reducing nuisance trips and improving line availability in machine centers and packaging lines. Application: motor control circuits and drives operating at 500 V with inrush currents. Feature → Business Impact → Application: 4.5 A rating aligns protection with common control devices while maintaining selectivity with upstream breakers in multi-load panels. Application: compact control panels and transformer-fed circuits. Feature → Business Impact → Application: 10 kAIC interrupt rating at 500 Vac provides robust fault clearance, lowering arc risk and extending equipment life in high-current fault scenarios. Application: motor control transformers and heavy-duty automation panels. Feature → Business Impact → Application: Ferrule end x ferrule end connections enable quick, secure wiring and consistent terminations. Application: panel wiring with standard ferrule fittings. Feature → Business Impact → Application: Nickel-plated bronze endcaps improve durability in harsh environments, reducing maintenance needs. Application: control panels exposed to vibration or humidity. Feature → Business Impact → Application: CE RoHS compliance simplifies procurement and regulatory audits, enabling faster project approvals. Application: cross-border deployments and supplier qualification programs.
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FAQs
FNQ-4-1/2 is built for ferrule-end terminations, matching standard control panels that use ferrule wiring. The fuse body is compact (0.41 in wide, 0.41 in deep, 1.5 in tall), enabling straightforward installation in crowded enclosures or DIN-rail layouts. Because it is non-indicating, it keeps wiring diagrams simple and reduces panel-time during commissioning.
FNQ-4-1/2 delivers time-delay protection, tolerating motor-start surges while still delivering fast fault clearance with a 10 kAIC interrupt rating at 500 V. This prevents nuisance opens during startup and minimizes unnecessary downtime, helping maintenance teams plan around predictable protection. It also reduces fusing nuisance without compromising safety in high-inrush circuits.
FNQ-4-1/2 is well suited for motor control transformers and drives where continuous protection, compact form factor, and reliable interruption are required. The ferrule-to-ferrule terminals simplify wiring in control panels and minimize loose connections. With CE RoHS compliance, it's compatible with common industrial standards, making panel integration straightforward and reducing the time needed for safety audits.
FNQ-4-1/2 carries CE marking and RoHS compliance, signaling adherence to European safety requirements and restricted substance rules. This helps buyers meet internal compliance goals, align with supplier quality programs, and pass regulatory reviews quickly. While other certifications vary by region, selecting a CE RoHS-compliant fuse simplifies cross-border procurement and reduces the need for additional conformity testing.
Using FNQ-4-1/2 can lower total cost of ownership by reducing nuisance tripping and associated downtime, which improves throughput and equipment availability. The 10 kAIC interrupt rating provides strong protection against fault currents, while ferrule-end wiring speeds installation and minimizes maintenance visits. Its durable nickel-plated endcaps resist wear and support long service life in harsh environments.