Eaton FWH-400A High Speed Fuse - 200 kAIC at 1000 Vac
Part Number: FWH-400A
Quick Summary
Eaton FWH-400A high speed fuse protects electrical systems in industrial power circuits by interrupting faults quickly. In critical power installations, delayed fault clearance and nuisance trips can cost uptime and drive maintenance expenses. The device is CE marked, RoHS compliant, and CSA Certified with UL Recognized status, reflecting compliance across global standards. For engineers and maintenance teams, reliable protection translates into safer panels, reduced arc energy, and simpler regulatory compliance. With 400 A RMS rating, 750 Vac / 750 Vdc voltage capability, and robust interrupt performance, the FWH-400A delivers business value through safer operations and lower lifecycle costs. The design also supports straightforward installation in blade-end or stud configurations, streamlining spares management and field upgrades.
Product Information
Extended Description
FWH-400A Eaton: Eaton Bussmann series FWH high speed fuse, 750 Vac, 750 Vdc, 400A RMS, 200 kAIC at 1000 Vac, 50 kAIC at 500 Vdc, Non Indicating, High speed fuse, Blade end X blade end, Stud
Product Name
Eaton Bussmann series FWH high speed fuse
Catalog Number
FWH-400A
UPC
051712150187
EAN
5027590061292
Product Length/Depth
1.69 in
Product Height
1.61 in
Product Width
4.52 in
Product Weight
0.52 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
CSA Certified UL Recognized
Amperage Rating
400A RMS
Interrupt rating
50 kAIC at 500 Vdc 200 kAIC at 1000 Vac
Voltage rating
750 Vac, 750 Vdc
Watt losses
65 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 - FWH-400A
Bussmann series FWH 6x32mm high speed fuse data sheet no. 720038
Bussmann series FWH 6x32mm high speed fuse data sheet no. 720038
Datasheet - FNQ-30
Feature → Business Impact → Application: The FWH-400A provides a 400 A RMS amperage rating and a 750 Vac / 750 Vdc voltage rating, enabling fast fault interruption that minimizes damage to feeders and motors, reducing downtime in manufacturing lines and power distribution panels. This translates to improved reliability for motor drives and control systems in industrial automation. Feature → Business Impact → Application: Interrupt ratings of 50 kAIC at 500 Vdc and 200 kAIC at 1000 Vac ensure high-energy fault events are controlled, protecting expensive equipment and reducing repair costs in large drive trains and panelboards. Feature → Business Impact → Application: Blade end x blade end connections with stud mounting offer mounting versatility and straightforward retrofits in existing switchgear, enabling faster maintenance and simplified stocking. Feature → Business Impact → Application: Non-indicating fuse design minimizes replacement complexity while keeping space in crowded panels, supporting compact layouts in machine builders and packaging lines. Feature → Business Impact → Application: 6x32 mm high-speed fuse format and standard packaging improve compatibility with common industrial enclosures, reducing fitment risk during upgrades and new builds. Feature → Business Impact → Application: Watt losses of 65 W and documented compliance (CE RoHS) help facilities meet energy-efficiency targets and green initiative requirements across production environments.
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FAQs
The FWH-400A supports blade-end x blade-end connections with a stud mounting option, allowing quick, secure installation in panelboards and motor control centers. For field swaps, ensure mating connectors match the blade polarity and tighten mounting hardware to spec to maintain fault clearance performance.
Important ratings include 400 A RMS amperage, 750 Vac / 750 Vdc voltage, and high interrupt ratings of 50 kAIC at 500 Vdc and 200 kAIC at 1000 Vac. These ensure rapid fault interruption while protecting downstream equipment in both AC and DC bus applications.
Yes. Its 750 Vac / 750 Vdc rating, 400 A RMS capability, and high interrupt ratings make it suitable for motor drives and power distribution panels found in manufacturing and process environments, delivering fast protection without compromising drive performance.
The FWH-400A is CE marked, RoHS compliant, and CSA Certified with UL Recognized status, aligning with global regulatory requirements and facilitating compliance in multinational facilities and certified product lines.
Fast fault interruption reduces arc energy and equipment damage, lowering repair costs and downtime. Its compatible form factor and non-indicating design simplify stocking and replacements, improving uptime and total cost of ownership for industrial automation projects.