Eaton FNQ-R-20 Fuse - Class CC, 200 kAIC at 600 Vac
Part Number: FNQ-R-20
Quick Summary
Eaton FNQ-R-20 fuse provides time-delay current-limiting protection for industrial control circuits. This design helps prevent nuisance trips and downtime during transformer inrush or motor startup surges. It is CE marked and RoHS compliant, delivering regulatory assurance for global deployments. As part of the Bussmann series, this Class CC device supports reliable line protection in control panels and small transformers. For procurement and maintenance teams, the FNQ-R-20 pairs with standard ferrule-terminals, offering predictable performance and simplified stocking across projects. Engineers also appreciate the fuse's compact footprint, which helps fit crowded enclosures without compromising safety. Using the Bussmann FNQ-R family across equipment reduces spare parts complexity and inventory costs while ensuring consistent performance in mission-critical applications.
Product Information
Extended Description
FNQ-R-20 Eaton: Eaton Bussmann Series Class CC fuse, FNQ, time-delay, dual-element current limiting fuse, 20 A, rejection style fuse, interrupting rating of 200kA at 600Vac and 20 kA at 300 Vdc
Product Name
Eaton Bussmann series FNQ-R fuse
Catalog Number
FNQ-R-20
UPC
051712497121
EAN
5027590449717
Product Length/Depth
0.41 in
Product Height
1.5 in
Product Width
0.41 in
Product Weight
0.15 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Type
Current-limiting time-delay fuse
Special features
Rejection style
Application
Line protection, small control transformers, industrial control, branch circuits
Amperage Rating
20 A
Class
Class CC
Interrupt rating
200 kAIC at 600 Vac 20 kAIC at 300 Vdc
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 Vac, 300 Vdc
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
The FNQ-R-20 uses a time-delay, dual-element current-limiting design to tolerate transformer inrush and startup surges while preserving fast fault clearing. The business impact is a significant reduction in nuisance trips and downtime, translating to higher line availability in manufacturing cells and industrial controls. Applications include line protection, small control transformers, and branch circuits where startup spikes are common. With a 20 A rating and a 200 kAIC interrupt capability at 600 Vac, this Class CC fuse delivers strong fault isolation for high-energy panels, improving equipment safety, reducing arc-flash exposure, and extending component life in power distribution gear. It is well-suited for feeders, control circuits, and protective interfaces that demand reliable interruption under short-circuit conditions. Rejection-style construction prevents incorrect fuses from being seated, reducing installation errors during maintenance and stocking. Ferrule-end connections enable quick, secure terminations, and the compact form factor fits tight enclosures, aligning with existing spare-part inventories. CE marking and RoHS compliance address regulatory expectations across global sites, while standard packaging and readily available datasheets support fast qualification and BOM integration.
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FAQs
The FNQ-R-20 is designed for line protection, small control transformers, industrial control circuits, and branch circuits where startup surges are common. Its 20 A rating and Class CC construction make it a reliable choice for protecting panels and feeders without nuisance trips during normal operation.
The time-delay, dual-element design tolerates inrush currents and startup surges, preventing unnecessary interruptions. This reduces downtime and equipment wear, while still delivering rapid fault clearance when a true fault occurs, improving overall line reliability in control panels and machinery.
The FNQ-R-20 uses ferrule end x ferrule end connections. Use appropriate ferrule sizes and secure crimp terminations to ensure reliable current transfer and vibration resistance in panel wiring, enabling quick swaps and consistent performance across maintenance cycles.
Yes. The FNQ-R-20 is CE marked and RoHS compliant, aligning with global regulatory requirements and environmental standards for equipment located in diverse facility environments and across international sites.
The FNQ-R-20 provides 200 kAIC interrupt rating at 600 Vac and 20 kAIC at 300 Vdc, with a 20 A amperage rating. It features non-indicating operation, Class CC designation, and a reaction time of 12 seconds at 200% of rated current, balancing protection with nuisance-survive capability.