Bussmann KAC-400 600V AC 400A KAC Series Fuse
● LT: 8-12w600V AC 400A KAC Series fuse, 34,500 A²s clearing I²t.
Rated Current400A
Rated Voltage600V AC
Breaking Capacity200kA RMS Sym.
PackageNorth American Cylindrical Style
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Part NumberKAC-400BrandEaton BussmannRequested Qty
aR fast acting (f) fuse 400A 600V AC, KAC Series (600V AC High-Speed). DC common bus, Power converters, Industrial drives, UPS. Low I²t 34,500 A²s, low watt loss 30.0W. UL Recognized, CE, IEC 60269-4 compliant.
Quick answer, specifications & FAQ
Direct answer
Eaton Bussmann High-Speed Fuse KAC-400 is rated 400A, 600V AC, Fast Acting, North American Cylindrical Style. Breaking capacity 200kA RMS Sym., I²t 34.5k A²s, operating temperature -40°C to +125°C, certifications UL Recognized|CE|IEC 60269-4. Listed applications: DC Bus Protection, Motor Drives, Power conversion, UPS systems. Standards: IEC 60269-4. 600V AC 400A KAC Series fuse, 34,500 A²s clearing I²t.
Key specifications
- Part number: KAC-400
- Brand: Eaton Bussmann
- Rated current: 400A
- Rated voltage: 600V AC
- Breaking capacity: 200kA RMS Sym.
- Fuse speed: Fast Acting
- Package size: North American Cylindrical Style
- Dimensions: North American Style
- Terminal type: Bolted tag
- Operating temperature: -40°C to +125°C
- Certifications: UL Recognized|CE|IEC 60269-4
- Standards: IEC 60269-4
Frequently asked questions
What are the current and voltage ratings of KAC-400?
KAC-400 is rated 400A at 600V AC.
What is the breaking capacity of KAC-400?
KAC-400 has a breaking capacity of 200kA RMS Sym.. Confirm this covers the available fault current at the installation point.
What package size does KAC-400 use?
KAC-400 uses North American Cylindrical Style package size.
Which standards and approvals apply to KAC-400?
KAC-400 is listed under IEC 60269-4 / UL Recognized|CE|IEC 60269-4.
What is KAC-400 used for?
KAC-400 is listed for DC Bus Protection, Motor Drives, Power conversion, UPS systems applications. Verify suitability for your circuit before ordering.
What are the ordering terms for KAC-400?
KAC-400: typical lead time 12-16 weeks, minimum order 10 pcs. Submit a quote request for a firm quotation.
Data sources
- Part number
- KAC-400
- Brand
- Eaton Bussmann
- Last updated
- 2026-10-10
- Canonical URL
- https://fusestock.com/products/eaton-bussmann-kac-400/
Technical Specifications
- Part Number
- KAC-400
- Manufacturer Part Number
- KAC-400
- Series
- KAC Series (600V AC High-Speed)
- Fuse Type
- High-Speed Fuse
- Current Rating
- 400A
- Voltage Rating
- 600V AC
- AC / DC
- AC
- Breaking Capacity
- 200kA RMS Sym.
- I²t
- 34.5k A²s
- Pre-arcing I²t
- 6,000 A²s
- Total I²t
- 34500
- Operating Temperature
- -40°C to +125°C
- Package / Dimensions
- North American Cylindrical Style
- Mounting
- Bolt Mount
- Application
- DC Bus Protection · Motor Drives · Power conversion · UPS systems
- Standard
- IEC 60269-4
- Terminal Type
- Bolted tag
- Fuse Speed
- Fast Acting
- Utilization Class
- aR
- Approvals
- CE · RoHS · UL Recognized
- Certifications
- UL Recognized|CE|IEC 60269-4
- Reference Lead Time
- 12-16 weeks
- Minimum Order
- 10 pcs
- Sample Status
- Contact for Availability
- Clearing I²t
- 34,500 A²s
- Watt Loss @ In
- 30.0W
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