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Eaton Bussmann FWX-450A 450A 250V AC/DC North American High-Speed Semiconductor Fuse
Eaton Bussmann

Eaton Bussmann FWX-450A 450A 250V AC/DC North American High-Speed Semiconductor Fuse

Part Number: FWX-450A

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FWX-450A: 450A; 250V AC/DC; North American High-Speed; High-Speed; 200kA AC / 20kA DC.

Rated Current450A
Rated Voltage250V AC/DC
Breaking Capacity200kA AC / 20kA DC
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Eaton Bussmann FWX-450A is a north american high-speed semiconductor fuse rated 450A at 250V AC/DC. Interrupting/withstand rating: 200kA AC / 20kA DC. Typical applications: DC common bus, DC drives, Power converters, Rectifiers, Reduced-voltage starters. Source: Bussmann Full Line Catalog 1007 (2018), page 4-7.

Quick answer, specifications & FAQ
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Eaton Bussmann High-Speed Semiconductor Fuse FWX-450A is rated 450A, 250V AC/DC, High Speed. Breaking capacity 200kA AC / 20kA DC, I²t Pre-arcing 22100 A²s; clearing 101000 A²s, certifications UL Recognized|CSA to 800A|CE. Listed applications: DC Bus Protection, Motor Drives, Motor Starters, Power conversion. Standards: CSA Class 1422-30. FWX-450A: 450A; 250V AC/DC; North American High-Speed; High-Speed; 200kA AC / 20kA DC.

Last updated 39 days ago

Key specifications

  • Part number: FWX-450A
  • Brand: Eaton Bussmann
  • Rated current: 450A
  • Rated voltage: 250V AC/DC
  • Breaking capacity: 200kA AC / 20kA DC
  • Fuse speed: High Speed
  • Terminal type: Bolted Tag
  • Certifications: UL Recognized|CSA to 800A|CE
  • Standards: CSA Class 1422-30
  • Typical lead time: 12-16 weeks
  • Source: Bussmann Full Line Catalog 1007 (2018), page 4-7. Catalog watts loss at rated current: 49 W.

Frequently asked questions

What are the current and voltage ratings of FWX-450A?

FWX-450A is rated 450A at 250V AC/DC.

What is the breaking capacity of FWX-450A?

FWX-450A has a breaking capacity of 200kA AC / 20kA DC. Confirm this covers the available fault current at the installation point.

Which standards and approvals apply to FWX-450A?

FWX-450A is listed under CSA Class 1422-30 / UL Recognized|CSA to 800A|CE.

What is FWX-450A used for?

FWX-450A is listed for DC Bus Protection, Motor Drives, Motor Starters, Power conversion applications. Verify suitability for your circuit before ordering.

What are the ordering terms for FWX-450A?

FWX-450A: typical lead time 12-16 weeks. Submit a quote request for a firm quotation.

Data sources

Part number
FWX-450A
Brand
Eaton Bussmann
Last updated
2026-09-24
Canonical URL
https://fusestock.com/products/eaton-bussmann-fwx-450a/

Technical Specifications

Part Number
FWX-450A
Manufacturer Part Number
FWX-450A
Series
FWX Series (250V North American High-Speed)
Fuse Type
High-Speed Semiconductor Fuse
Current Rating
450A
Voltage Rating
250V AC/DC
AC / DC
AC/DC
Breaking Capacity
200kA AC / 20kA DC
I²t
Pre-arcing 22100 A²s; clearing 101000 A²s
Pre-arcing I²t
22100
Total I²t
101000
Mounting
Bolt Mount
Application
DC Bus Protection · Motor Drives · Motor Starters · Power conversion · Rectifiers
Standard
CSA Class 1422-30
Terminal Type
Bolted Tag
Fuse Speed
High Speed
Approvals
CE · CSA by rating · UL Recognized
Certifications
UL Recognized|CSA to 800A|CE
Reference Lead Time
12-16 weeks
Source
Bussmann Full Line Catalog 1007 (2018), page 4-7. Catalog watts loss at rated current: 49 W.

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