Eaton FWX-400A High Speed Fuse - UL Recognized CSA Certified
Part Number: FWX-400A
Quick Summary
FWX-400A high speed fuse protects electrical drives and control panels by rapidly interrupting overcurrents in 600 V systems. Engineers often face nuisance trips in dense switchgear when protection is too slow; this fuse delivers fast response without compromising safety. It carries UL Recognized, CSA Certified status and CE Marked RoHS compliance, supporting international approvals and streamlined procurement. The compact, non-indicating design and blade-end connections simplify replacement and maintenance in panel boards and drive cabinets, delivering reliable electrical protection with predictable life-cycle costs. This combination of rugged performance and global compliance helps teams meet uptime targets while controlling total cost of ownership.
Product Information
Extended Description
FWX-400A Eaton: Eaton Bussmann series FWX high speed fuse, 600V, 400A RMS, 200 kAIC Vac, 50 kAIC at 250 Vdc, Non Indicating, High speed fuse, Blade end X blade end, Stud
Product Name
Eaton Bussmann series FWX high speed fuse
Catalog Number
FWX-400A
UPC
051712150712
Product Length/Depth
4.3 in
Product Height
1.63 in
Product Width
1.62 in
Product Weight
0.46 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Certifications
UL Recognized CSA Certified
Amperage Rating
400A RMS
Interrupt rating
50 kAIC at 250 Vdc 200 kAIC Vac
Voltage rating
600 V
Watt losses
44 W
Packaging type
Standard
Connection
Blade end x blade end
Fuse indicator
Non Indicating
Mounting method
Stud
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - FWX-400A
FWX-400A~BUSS HIGH SPEED FUSE
FWX-400A~BUSS HIGH SPEED FUSE
Datasheet - FNQ-30
Feature → Business Impact → Application: The FWX-400A delivers a 600 V rating and 400 A RMS protection with high interrupt capability (200 kAIC Vac, 50 kAIC at 250 Vdc). This enables faster fault clearance, reducing arc energy and safeguarding critical drives and panels, which translates to lower downtime and tighter safety margins in motor control centers. Application: suited for industrial drives and power distribution panels where compact form and robust protection are required. Feature → Business Impact → Application: Non-indicating construction paired with blade-end x blade-end connections simplifies replacement in crowded cabinets. Benefit: faster service, fewer wiring errors, and minimal panel downtime during maintenance. Application: ideal for retrofit projects and new installations in automated lines. Feature → Business Impact → Application: Stud mounting plus a compact 4.3 in length and 0.46 lb weight make it easy to fit into tight enclosures while maintaining mechanical stability. Benefit: reduced mounting complexity and improved vibration resistance in harsh environments. Application: drives, inverters, and switchgear in automation cells. Feature → Business Impact → Application: RoHS and CE compliance with UL Recognized and CSA Certified assurances reduce regulatory risk and enable global deployment. Benefit: smoother procurement, fewer compliance reviews, and faster time-to-value across multiple regions. Application: multinational plants and OEM integrations where standards vary by region.
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FAQs
Install FWX-400A using blade-end x blade-end connections or, when required, mount with its Stud configuration to secure the fuse within the panel. Ensure the panel supports 600 V systems and 400 A RMS ratings. Follow Eaton datasheets for installation clearances, bandwidth, and connector torque specs to minimize resistance and heat buildup.
Yes. FWX-400A supports blade-end x blade-end connections and includes a stud mounting option, offering flexible integration in legacy panels and modern drives. Verify enclosure clearance and mounting hardware to maintain proper alignment and insulation. This compatibility helps reduce redesign costs during upgrades or new installations.
FWX-400A provides 600 V voltage rating, 400 A RMS amperage, and interrupt ratings of 50 kAIC at 250 Vdc and 200 kAIC Vac. Watt losses are 44 W, and it uses non-indicating construction with blade-end connections and stud mounting. These specs enable fast fault clearance and safe, high-energy applications in automation equipment.
Yes. FWX-400A is RoHS Compliant and CE marked, with UL Recognized and CSA Certified certifications. This combination supports global deployment, reduces regulatory risk, and simplifies cross-border procurement for OEMs and integrators implementing international standards.
The FWX-400A delivers rapid fault clearance, minimizing equipment damage and unplanned downtime. Its high interrupt ratings provide safety margins, while the non-indicating design reduces maintenance checks. Overall, this translates to lower total cost of ownership, less panel downtime, and more consistent production throughput in automated facilities.