Eaton FNQ-3-1/2 Fuse - 10 kAIC at 500 VAC
Part Number: FNQ-3-1/2
Quick Summary
The Eaton FNQ-3-1/2 fuse provides reliable overcurrent protection for motor control circuits and general power distribution. Engineers often grapple with inrush currents and nuisance trips that disrupt production, and a properly sized fuse helps minimize downtime. This device carries CE Marked and RoHS Compliant certifications, aligning with stringent European standards for safe, compliant electrical protection. The FNQ-3-1/2 balances compact form with robust protection, offering easy integration in panel boards while supporting accurate 3.5 A protection and fast response where needed, making it a practical choice for motor starts and transformer circuits. The combination of standard packaging and ferrule-end connections also simplifies installation in legacy and new builds alike.
Product Information
Extended Description
FNQ-3-1/2 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 3.5 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-3-1/2
UPC
051712786034
Product Length/Depth
1.5 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.175 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
3.5 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-3-1/2
FNQ-3-1/2~FNQ-3-1-2~BUSS MIDGET FUSE
Feature → Business Impact → Application: Time-delay design handles motor startup inrush currents, reducing nuisance trips and enabling smoother equipment startups in fans, pumps, and conveyors across manufacturing lines. This translates to higher line uptime and lower maintenance costs. Application: Motor control panels and transformer-fed circuits in automated systems benefit from stable protection without compromising start-up performance. Feature → Business Impact → Application: Ferrule end x ferrule end connections provide reliable, vibration-resistant terminations that speed installation and minimize field rewiring, improving installation efficiency in retrofit projects and new equipment builds. Application: Control cabinet assemblies and power distribution blocks in industrial environments where panel density matters. Feature → Business Impact → Application: Nickel-plated bronze endcaps offer corrosion resistance and durability in harsh factory floors, extending fuse life and reducing replacement cycles in dusty or humid environments. Application: Panels near wash stations, grinders, or CNC machines. Feature → Business Impact → Application: 500 V operating capacity with a 10 kAIC interrupt rating ensures strong fault handling for short-circuit events, protecting downstream devices and reducing damage costs. Application: High-energy circuits and multi-circuit panels. Feature → Business Impact → Application: 1.5 in length and 0.41 in height/width enable compact installation in tight spaces, supporting higher panel density and simpler retrofits. Application: Small-form-factor protection in compact control housings and modular enclosures. Feature → Business Impact → Application: Standard packaging supports consistent stocking and quick replacement, lowering procurement complexity for maintenance teams in multi-site operations.
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FAQs
The FNQ-3-1/2 is designed for ferrule-end terminations. To install, ensure the circuit is de-energized, insert the fuse into compatible fuse holders with ferrule terminals, and crimp or solder ferrules as specified by the panel design. Verify correct orientation and secure mechanical fit to prevent vibration-related loosening in industrial environments.
This 3.5 A, 500 V time-delay fuse is ideal for motor control circuits, transformers feeding motor starters, and circuits with inrush currents. Its non-indicating design focuses on protective performance, while the ferrule-to-ferrule ends simplify integration in standardized control panels and distribution blocks.
The FNQ-3-1/2 has an amperage rating of 3.5 A, a voltage rating of 500 V, and an interrupt rating of 10 kAIC at 500 VAC. These specs provide robust short-circuit protection for moderate current circuits in industrial settings.
Yes. The FNQ-3-1/2 is CE marked and RoHS compliant, ensuring it meets European safety and environmental requirements for electrical protection components used in compliant assemblies and systems.
The fuse uses nickel-plated bronze endcaps with ferrule-end connections. This construction provides good corrosion resistance, durable contact reliability, and straightforward installation in standard panel enclosures and control cabinets.