Eaton FNQ-R-1/4 Fuse - 200 kAIC Interrupt Rating
Part Number: FNQ-R-1/4
Quick Summary
The Eaton FNQ-R-1/4 fuse is a current-limiting device designed for reliable protection in low-voltage control circuits. Engineers often wrestle with nuisance trips and downtime when ratings are off, risking equipment damage and costly outages. This CE marked and RoHS-compliant time-delay, dual-element Class CC fuse combines a 0.25 A rating with a 200 kAIC interrupt rating to deliver robust protection for demanding panel applications. Its compact form factor and ferrule-end connections simplify installation, while meeting line protection needs for small control transformers, industrial control circuits, and branch protection. The result is faster design cycles, predictable maintenance, and improved uptime in critical manufacturing environments.
Product Information
Extended Description
FNQ-R-1/4 Eaton: Eaton Bussmann Series Class CC fuse, FNQ, time-delay, dual-element current limiting fuse, 0.25 A, rejection style fuse, interrupting rating of 200kA at 600Vac
Product Name
Eaton Bussmann series FNQ-R fuse
Catalog Number
FNQ-R-1/4
UPC
051712147002
EAN
5027590449656
Product Length/Depth
1.5 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.02 lb
Warranty
Not Applicable
Compliances
CE Marked
Type
Current-limiting high inrush time-delay fuse
Special features
Rejection style
Application
Line protection, small control transformers, industrial control, branch circuits
Amperage Rating
0.25 A
Class
Class CC
Interrupt rating
200 kAIC
Fuse indicator
Non-indicating
Connection
Ferrule end x ferrule end
Response time
12 sec at 200%
Material
Melamine tube
Packaging type
Standard
Voltage rating
600 V
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series FNQ-R Class CC Fuse Data Sheet No. 1014
Feature → Business Impact → Application: The FNQ-R-1/4 uses a time-delay, dual-element current-limiting design to tolerate inrush while stabilizing fault currents, reducing nuisance trips and extending equipment life in power and control circuits. This translates to lower maintenance costs and minimized unplanned downtime in industrial automation setups, particularly where small transformers and branch circuits are common. Application: Line protection, small control transformers, industrial control, branch circuits. The 0.25 A Amperage Rating ensures precise protection for low-current loads without oversizing protection devices, improving selectivity and reducing replacement costs during routine maintenance. Class CC architecture offers a compact footprint compatible with standard Bussmann ferrule-end terminations, facilitating quick retrofit and consistent mounting. Application: Panel boards and compact control panels. The 600 V voltage rating and 200 kAIC interrupt rating provide strong fault tolerance for medium-energy circuits, enabling safer operation in motor control centers and machine panels. Application: Industrial machinery protection. Rejection-style construction minimizes misapplication by ensuring only compatible fuses are installed, improving installation quality in busy production lines. Ferrule-end connections and melamine tube construction deliver durable, heat-resistant performance in harsh environments. Packaging is standard for easy stocking and rapid replacement, supporting lean maintenance strategies.
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FAQs
The FNQ-R-1/4 is designed for ferrule-end x ferrule-end connections, matching standard Bussmann ferrule terminals. Its 1.5 inch length and 0.41 inch width ensure compatibility with compact control panels, while the melamine tube construction provides dependable insulation. When replacing an existing fuse, verify the Class CC rating and time-delay characteristics to preserve coordination with upstream protection. Always follow manufacturer torque specs and use compatible housings or panels to avoid contact or arcing concerns.
A 200 kAIC interrupt rating indicates the fuse can safely interrupt peak fault currents up to 200 kiloamps at its rated voltage. This level of performance supports protection in circuits with substantial inrush or short-circuit events, such as small control transformers and industrial branch circuits. In practice, it helps prevent transformer burnouts and equipment damage while maintaining selectivity with upstream protections and main fuses.
Yes. With a 0.25 A rating, time-delay operation, and current-limiting characteristics, the FNQ-R-1/4 is well-suited for protecting small control transformers and branch circuits where brief inrush is common. The Class CC format and 600 V rating provide reliable protection in typical automation panels, reducing nuisance trips while maintaining fast fault clearance for sensitive loads.
The FNQ-R-1/4 is CE Marked, indicating compliance with essential EU safety and health requirements. Eaton also provides tools to verify RoHS compliance via their RoHS Search Tool, supporting regulated material restrictions. While other certifications are not listed in the data, the CE marking and RoHS verification options help ensure regulatory alignment for European installations and responsible material usage.
Because the FNQ-R-1/4 is a time-delay, current-limiting device with a high interrupt rating, it reduces nuisance trips and extends service intervals for control circuits. Its ferrule-end design simplifies stocking and replacement, minimizing downtime during maintenance. The reliable protection lowers the risk of transformer damage and panel failures, delivering a favorable total cost of ownership through fewer unplanned outages and reduced spare-part inventory.