Eaton FNQ-R-3/4-R1 fuse - Class CC current-limiting
Part Number: FNQ-R-3/4-R1
Quick Summary
The FNQ-R-3/4-R1 fuse by Eaton provides current-limiting protection for line circuits and industrial control applications. Engineers often contend with nuisance trips and inrush spikes during startup of small control transformers. RoHS compliant; note that CE, SIL, or IP ratings are not specified for this catalog entry. Used across line protection, industrial control, and branch circuits, this model supports reliable protection with a compact Bussmann-series form factor. Its 0.75 A rating and Class CC construction balance selectivity and fast clearing for fuse protection without unnecessary outages. In practice, this translates to reduced downtime and simpler stocking for panel Shop and OEM programs.
Product Information
Extended Description
FNQ-R-3/4-R1 Eaton: Eaton Bussmann series FNQ-R fuse, Current-limiting high inrush time-delay fuse, Line protection, Small control transformers, Industrial control, Branch circuits, 0.75 A, Class CC
Product Name
Eaton Bussmann series FNQ-R fuse
Catalog Number
FNQ-R-3/4-R1
UPC
051712509480
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
Not Applicable RoHS Compliant
Type
Current-limiting high inrush time-delay fuse
Application
Line protection, small control transformers, industrial control, branch circuits
Amperage Rating
0.75 A
Class
Class CC
FNQ-R-3/4-R1~FNQ-R-3-4-R1~1CLASS CC W/14X51 REDUCERS
FNQ-R-3/4-R1~FNQ-R-3-4-R1~1CLASS CC W/14X51 REDUCERS
Bussmann series Fuseology
Eaton Specification Sheet - FNQ-R-3/4-R1
Feature → Business Impact → Application: The FNQ-R-3/4-R1 fuse is a current-limiting, high inrush time-delay device that minimizes damage from short-circuit events while tolerating normal inrush, reducing unscheduled downtime in line protection and transformer startups. This translates to superior reliability in industrial control panels and branch circuits, enabling technicians to protect small control transformers without sacrificing performance. Feature → Business Impact → Application: With a 0.75 A rating and Class CC construction, the fuse provides selective coordination to avoid unnecessary outages in auxiliary circuits while delivering fast fault clearance in commercial/industrial environments. This is ideal for protecting feeders and control loops in machines and panel boards. Feature → Business Impact → Application: Its compact 1.5 in length and 0.41 in cross-section simplify panel mounting and wire routing, saving space in crowded enclosures and easing retrofit projects. This supports faster installs and cleaner panel layouts in OEM and maintenance operations. Feature → Business Impact → Application: RoHS compliance ensures regulatory alignment and sustainability during procurement, while the Bussmann-series ecosystem guarantees compatibility with other protection devices, aiding standardization across a site. This fosters lower training costs and consistent maintenance. Feature → Business Impact → Application: Documentation availability, including catalog sheets and datasheets, reduces engineering guesswork and accelerates part turnover, helping procurement teams meet project deadlines without sacrificing protection quality.
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FAQs
The FNQ-R-3/4-R1 is designed for panel-mounted protection in line circuits and small control transformer feeders. Its Class CC form factor and 1.5 inch length fit in typical DIN rail or dashboard-style panels, while its 0.75 A rating supports selective fault-clearing without nuisance tripping in standard control panels. Verify space in the enclosure and ensure proper terminal access for reliable wiring and secure connections.
The fuse combines current-limiting action with a high inrush time-delay profile, allowing normal transformer energization without immediate fault clearance. This protects transformer windings from peak surge currents while providing fast protection during actual faults. For OEMs, this means fewer unnecessary outages and improved equipment longevity in power packs and control transformers.
Best suited for line protection, small control transformers, industrial control enclosures, and branch circuit protection in automation panels. The 0.75 A Class CC fuse delivers selective protection, enabling upstream devices to stay energized during minor faults while clearing severe faults quickly, which reduces downtime in machine tenders and retrofits.
This fuse is RoHS compliant, supporting responsible material usage and regulatory alignment. The catalog entry does not specify CE, SIL, or IP ratings; confirm region-specific requirements with your compliance team or Eaton literature before procurement for international deployments.
The combination of current-limiting protection and a compact form factor reduces component stress and enclosure footprint, lowering maintenance costs and spare-part inventories. Fewer nuisance trips translate to higher equipment uptime and stronger return on investment for automation projects, while compatibility with the Bussmann-series ecosystem simplifies procurement and stocking.