Eaton FNQ-R-4-1/2 Fuse - 200 kAIC, 600V Class CC
Part Number: FNQ-R-4-1/2
Quick Summary
FNQ-R-4-1/2 fuse is a time-delay, current-limiting device for line protection and small control transformers. Designers often wrestle with nuisance inrush, space constraints, and the need to meet regulatory uptime targets. This Eaton Bussmann Class CC fuse delivers reliable performance with a high 200 kAIC interrupt rating at 600 V, while maintaining compact form. CE marking and RoHS compliance help ensure regulatory alignment in modern panels. With a 4.5 A rating and ferrule-end connections, it installs quickly in industrial control cabinets, reducing wiring complexity. Using this fuse for line protection and branch circuits supports lower maintenance costs and longer asset life across manufacturing environments.
Product Information
Extended Description
FNQ-R-4-1/2 Eaton: Eaton Bussmann Series Class CC fuse, FNQ, time-delay, dual-element current limiting fuse, 4.5 A, rejection style fuse, interrupting rating of 200kA at 600Vac
Product Name
Eaton Bussmann series FNQ-R fuse
Catalog Number
FNQ-R-4-1/2
UPC
051712582421
Product Length/Depth
1.5 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.15 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Type
Current-limiting high inrush time-delay fuse
Special features
Rejection style
Application
Line protection, small control transformers, industrial control, branch circuits
Amperage Rating
4.5A
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-4-1/2 is a time-delay, current-limiting fuse designed to absorb transient inrush without unnecessary opening, reducing nuisance trips in line protection and small control transformers. This translates to fewer unnecessary outages and smoother startup sequences in industrial control panels. Application: ideal for branch circuits and industrial control systems where fast, reliable protection is required without compromising control performance. Feature → Business Impact → Application: Rejection-style design prevents incorrect fuse installation, improving reliability in high-mix environments and simplifying maintenance in serviceable control panels. Application: suitable for replacement in Bussmann FNQ-R family assemblies and compact protective enclosures. Feature → Business Impact → Application: 600 V rating combined with a 200 kAIC interrupt capacity provides robust short-circuit protection for equipment fed from medium-voltage-like control circuits, reducing incident damage and cost of downtime in machine tools and packaging lines. Application: line protection and industrial transformers. Feature → Business Impact → Application: Ferrule-end connections enable quick, solder-free termination and repeatable field assembly, supporting faster panel builds and secure terminations in rugged environments. Application: standard protection in industrial control cabinets and modular switchgear. Feature → Business Impact → Application: Non-indicating fuse indicator minimizes visual complexity in busy panels, lowering inspection time and allowing fault diagnosis through continuity testing or data logging rather than indicator lamps. Application: suitable for clean, organized control rooms and high-density panel layouts. Feature → Business Impact → Application: Compliance with CE and RoHS supports global deployment and supply-chain reliability, limiting compliance risk for OEMs shipping to multiple regions. Application: essential for global manufacturing lines and export-ready equipment.
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FAQs
The FNQ-R-4-1/2 features ferrule end x ferrule end connections, enabling quick, solder-free terminations with compatible ferrule crimp terminations. This minimizes installation time in industrial control panels and improves vibration resistance in harsh environments. Use with standard ferrule crimps to ensure consistent electrical contact and reliable retention in busy control cabinets.
Key specs include a 4.5 A amperage rating, 600 V voltage rating, and a 200 kAIC interrupt rating. It is a time-delay, current-limiting Class CC fuse with a 12-second response at 200% for controlled inrush events. These figures ensure protection for line circuits and small control transformers while allowing necessary startup current without nuisance opening.
Yes. This fuse is explicitly designed for line protection, small control transformers, and industrial control circuits, including branch circuits. Its Class CC, current-limiting, time-delay characteristics make it well-suited for equipment protecting sensitive electronics and machinery in manufacturing lines, without compromising startup performance or reliability.
The FNQ-R-4-1/2 is CE marked and RoHS compliant, aligning with European and international regulatory requirements. These certifications support global deployment in compliant electrical protection schemes and help OEMs meet safety and environmental obligations across markets.
The fuse reduces downtime by tolerating inrush without nuisance trips, simplifies installation with ferrule-end terminations, and lowers maintenance costs through reliable, robust protection. Its high interrupt rating protects downstream equipment, mitigating repair costs after faults and extending asset life in industrial control applications.