Eaton Bussmann 45ET 45A 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL) Class aR BS88 High-Speed Semiconductor Fuse
● Check availability45ET: 45A; 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL); Class aR; High-Speed; 200kA AC / 50kA DC.
Rated Current45A
Rated Voltage690V AC / 500V DC (IEC); 700V AC / 500V DC (UL)
Breaking Capacity200kA AC / 50kA DC
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Part Number45ETBrandEaton BussmannRequested Qty
Eaton Bussmann 45ET is a bs88 high-speed semiconductor fuse rated 45A at 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL). Interrupting/withstand rating: 200kA AC / 50kA DC. Typical applications: DC common bus, DC drives, Power converters, Rectifiers, Reduced-voltage starters. Source: Bussmann Full Line Catalog 1007 (2018), page 4-17 to 4-18.
Quick answer, specifications & FAQ
Direct answer
Eaton Bussmann High-Speed BS88 Fuse 45ET is rated 45A, 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL), High Speed. Breaking capacity 200kA AC / 50kA DC, I²t Pre-arcing 103 A²s; clearing 680 A²s @415Vac; 1100 A²s @660Vac, certifications IEC 60269-4|BS88-4|CE|UL Recognized by catalog number. Listed applications: DC Bus Protection, Motor Drives, Motor Starters, Power conversion. Standards: BS88 Part 4, IEC, IEC 60269-4. 45ET: 45A; 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL); Class aR; High-Speed; 200kA AC / 50kA DC.
Key specifications
- Part number: 45ET
- Brand: Eaton Bussmann
- Rated current: 45A
- Rated voltage: 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL)
- Breaking capacity: 200kA AC / 50kA DC
- Fuse speed: High Speed
- Terminal type: Bolted Tag
- Certifications: IEC 60269-4|BS88-4|CE|UL Recognized by catalog number
- Standards: BS88 Part 4, IEC, IEC 60269-4
- Typical lead time: 12-16 weeks
- Source: Bussmann Full Line Catalog 1007 (2018), page 4-17 to 4-18. Catalog watts loss at rated current: 11 W.
Frequently asked questions
What are the current and voltage ratings of 45ET?
45ET is rated 45A at 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL).
What is the breaking capacity of 45ET?
45ET 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 45ET?
45ET is listed under BS88 Part 4, IEC, IEC 60269-4 / IEC 60269-4|BS88-4|CE|UL Recognized by catalog number.
What is 45ET used for?
45ET 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 45ET?
45ET: typical lead time 12-16 weeks. Submit a quote request for a firm quotation.
Data sources
- Part number
- 45ET
- Brand
- Eaton Bussmann
- Last updated
- 2026-09-22
- Canonical URL
- https://fusestock.com/products/eaton-bussmann-45et/
Technical Specifications
- Part Number
- 45ET
- Manufacturer Part Number
- 45ET
- Series
- ET Series (BS88 High-Speed aR)
- Fuse Type
- High-Speed BS88 Fuse
- Current Rating
- 45A
- Voltage Rating
- 690V AC / 500V DC (IEC); 700V AC / 500V DC (UL)
- AC / DC
- AC/DC
- Breaking Capacity
- 200kA AC / 50kA DC
- I²t
- Pre-arcing 103 A²s; clearing 680 A²s @415Vac; 1100 A²s @660Vac
- Pre-arcing I²t
- 103
- Total I²t
- 1100
- Mounting
- Bolt Mount
- Application
- DC Bus Protection · Motor Drives · Motor Starters · Power conversion · Rectifiers
- Standard
- BS88 Part 4 · IEC · IEC 60269-4
- Terminal Type
- Bolted Tag
- Fuse Speed
- High Speed
- Utilization Class
- aR
- Approvals
- BS88 · CE · UL Recognized by catalog number
- Certifications
- IEC 60269-4|BS88-4|CE|UL Recognized by catalog number
- Reference Lead Time
- 12-16 weeks
- Source
- Bussmann Full Line Catalog 1007 (2018), page 4-17 to 4-18. Catalog watts loss at rated current: 11 W.
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