Eaton FNQ-9 Fuse - 10 kAIC at 500 Vac
Part Number: FNQ-9
Quick Summary
The Eaton FNQ-9 fuse is a time-delay device designed for motor control circuits in industrial equipment. Inrush currents can trigger nuisance trips, leading to downtime and unpredictable production schedules. It is CE marked and RoHS compliant, rated at 10 kAIC at 500 Vac, with nickel-plated bronze endcaps and ferrule-end connections. The FNQ-9 combines rugged protection with fast replacement and straightforward installation, supporting efficient panel design and reduced maintenance costs. This makes it a practical choice for OEMs and maintenance teams seeking reliable protection for motors, transformers, and other inductive loads.
Product Information
Extended Description
FNQ-9 Eaton: Eaton Bussmann series FNQ fuse, Time-delay, Motor control transformers, Circuits with in-rush currents, 9 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-9
UPC
051712786331
EAN
5027590407694
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
9 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
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - FNQ-9
FNQ-9~BUSS MIDGET FUSE
Datasheet - FNQ-30
Feature: Time-delay operation enables protection without nuisance trips during motor start-up. Benefit: Reduces unplanned downtime and extends motor life by accommodating short inrush currents. Application: Ideal for motor control panels and transformer feeders in industrial automation, where inrush is common and protection must be selective. Feature: High interrupt rating of 10 kAIC at 500 Vac provides robust fault clearing. Benefit: Minimizes collateral damage in short-circuit events and improves overall system reliability. Application: Suitable for circuits powering industrial motors, drives, and equipment with high fault-current potential, improving uptime and safety. Feature: Ferrule end x ferrule end connection with nickel-plated bronze endcaps. Benefit: Easy, durable terminations with excellent contact resistance, simplifying installation and long-term performance. Application: Panel builders and field technicians benefit from consistent fit and faster commissioning. Feature: 9 A, 500 V rating with standard packaging. Benefit: Compatible with a wide range of machine protection schemes while maintaining compact form factor. Application: Controls engineers can standardize protections across multiple machines, reducing part variety and procurement complexity. Feature: Compliance and lifecycle clarity with CE Mark and RoHS. Benefit: Streamlines regulatory approvals and sustainability goals for European deployments. Application: OEMs seeking compliant protection across product lines. If indicating status is required, consider FNQ variants with built-in indicators for visual confirmation. Insight: Bussmann FNQ fuses are a trusted choice in control panels for manufacturing and process industries, offering predictable timing, proven reliability, and straightforward sourcing, which translates to lower maintenance costs and faster repair cycles.
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FAQs
FNQ-9 uses ferrule-end to ferrule-end connections, a common choice for motor control circuits and control panels. This design delivers clean, reliable terminations with minimal crimping and consistent contact resistance, simplifying panel wiring and reducing commissioning time. It is compatible with standard 0.41 in by 0.41 in fuse endpoints and can be integrated with typical Bussmann series protective devices in same enclosures.
FNQ-9 is rated at 9 A and 500 V with an interrupt rating of 10 kAIC at 500 Vac. This combination supports protection for mid-range industrial loads, including motors and transformers, while providing sufficient clearance for short-circuit events. The time-delay characteristic helps handle motor inrush without nuisance tripping, improving reliability in demanding environments.
Yes. The time-delay (slow-blow) behavior of FNQ-9 is designed to tolerate brief inrush surges common in motor starts and transformer energization. Its 9 A rating, 500 V capacity, and 10 kAIC interrupt rating ensure protection without unnecessary trips, enabling smooth operation of motor control circuits and reducing downtime in production lines.
FNQ-9 complies with CE marking and RoHS requirements, aligning with European regulatory expectations for electrical protection devices. This supports OEMs and maintenance teams in meeting customer and market standards while ensuring compatibility with other RoHS-compliant components in the protection scheme.
FNQ-9 offers predictable protection for inductive loads with minimal nuisance trips, reducing unplanned downtime and maintenance cycles. Its robust construction with nickel-plated endcaps and ferrule-terminations improves long-term reliability, lowering replacement frequency and total cost of ownership for motor protection in automation environments.