Eaton Bussmann FWH-45B 45A 500V AC/DC North American High-Speed Fuse
● Check availabilityFWH-45B: 45A; 500V AC/DC; High-Speed; High-Speed; 200kA AC / 50kA DC.
Rated Current45A
Rated Voltage500V AC/DC
Breaking Capacity200kA AC / 50kA DC
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Part NumberFWH-45BBrandEaton BussmannRequested Qty
Eaton Bussmann FWH-45B is a north american high-speed fuse rated 45A at 500V AC/DC. Interrupting rating: 200kA AC / 50kA DC. Typical applications: DC common bus, Power converters/rectifiers, Reduced-voltage starters. Source: Bussmann Full Line Catalog 1007 (2018), page 4-8.
Quick answer, specifications & FAQ
Direct answer
Eaton Bussmann High-Speed Semiconductor Fuse FWH-45B is rated 45A, 500V AC/DC, High Speed. Breaking capacity 200kA AC / 50kA DC, certifications UL Recognized|CSA Certified|CE. Listed applications: DC Bus Protection, Motor Starters, Power conversion. FWH-45B: 45A; 500V AC/DC; High-Speed; High-Speed; 200kA AC / 50kA DC.
Key specifications
- Part number: FWH-45B
- Brand: Eaton Bussmann
- Rated current: 45A
- Rated voltage: 500V AC/DC
- Breaking capacity: 200kA AC / 50kA DC
- Fuse speed: High Speed
- Terminal type: Bolted Tag
- Certifications: UL Recognized|CSA Certified|CE
- Typical lead time: 12-16 weeks
- Source: Bussmann Full Line Catalog 1007 (2018), page 4-8.; Watts loss at rated current: 7.5 W
Frequently asked questions
What are the current and voltage ratings of FWH-45B?
FWH-45B is rated 45A at 500V AC/DC.
What is the breaking capacity of FWH-45B?
FWH-45B has a breaking capacity of 200kA AC / 50kA DC. Confirm this covers the available fault current at the installation point.
Which standards and approvals apply to FWH-45B?
FWH-45B is listed under UL Recognized|CSA Certified|CE.
What is FWH-45B used for?
FWH-45B is listed for DC Bus Protection, Motor Starters, Power conversion applications. Verify suitability for your circuit before ordering.
What are the ordering terms for FWH-45B?
FWH-45B: typical lead time 12-16 weeks. Submit a quote request for a firm quotation.
Data sources
- Part number
- FWH-45B
- Brand
- Eaton Bussmann
- Last updated
- 2026-09-22
- Canonical URL
- https://fusestock.com/products/eaton-bussmann-fwh-45b-45a-500v-ac-dc-north-american-high-speed-fuse/
Technical Specifications
- Part Number
- FWH-45B
- Manufacturer Part Number
- FWH-45B
- Series
- FWH Series (North American High-Speed Fuse)
- Fuse Type
- High-Speed Semiconductor Fuse
- Current Rating
- 45A
- Voltage Rating
- 500V AC/DC
- AC / DC
- AC/DC
- Breaking Capacity
- 200kA AC / 50kA DC
- Mounting
- Bolt Mount
- Application
- DC Bus Protection · Motor Starters · Power conversion
- Terminal Type
- Bolted Tag
- Fuse Speed
- High Speed
- Approvals
- CE · CSA Approval (Unspecified) · UL Recognized
- Certifications
- UL Recognized|CSA Certified|CE
- Reference Lead Time
- 12-16 weeks
- Source
- Bussmann Full Line Catalog 1007 (2018), page 4-8.; Watts loss at rated current: 7.5 W
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