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Bussmann FWK-40A25F 40A 750V DC FWK high-speed DC ferrule fuse
Eaton Bussmann

Bussmann FWK-40A25F 40A 750V DC FWK high-speed DC ferrule fuse

Part Number: FWK-40A25F

● LT: 12-16w

Eaton Bussmann FWK-40A25F, 40A, 750V DC; interrupting rating 50kA @ 750V DC.

Rated Current40A
Rated Voltage750V DC
Breaking Capacity50kA @ 750V DC
Package20×127mm or 25×146mm
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Eaton Bussmann FWK-40A25F is a Class gG high-speed dc FWK high-speed DC ferrule fuse rated 40A at 750V DC. Interrupting rating: 50kA @ 750V DC. Standard(s): IEC 60269.

Quick answer, specifications & FAQ
Direct answer

Eaton Bussmann High Speed Fuse FWK-40A25F is rated 40A, 750V DC, High Speed, 20×127mm or 25×146mm. Breaking capacity 50kA @ 750V DC, operating temperature -40°C to +125°C, certifications CE. Listed applications: DC Bus Protection, Power conversion, Solar PV Protection, UPS systems. Standards: IEC 60269. Eaton Bussmann FWK-40A25F, 40A, 750V DC; interrupting rating 50kA @ 750V DC.

Last updated 24 days ago

Key specifications

  • Part number: FWK-40A25F
  • Brand: Eaton Bussmann
  • Rated current: 40A
  • Rated voltage: 750V DC
  • Breaking capacity: 50kA @ 750V DC
  • Fuse speed: High Speed
  • Package size: 20×127mm or 25×146mm
  • Dimensions: 20×127mm or 25×146mm
  • Terminal type: Ferrule or Bolted
  • Operating temperature: -40°C to +125°C
  • Certifications: CE
  • Standards: IEC 60269

Frequently asked questions

What are the current and voltage ratings of FWK-40A25F?

FWK-40A25F is rated 40A at 750V DC.

What is the breaking capacity of FWK-40A25F?

FWK-40A25F has a breaking capacity of 50kA @ 750V DC. Confirm this covers the available fault current at the installation point.

What package size does FWK-40A25F use?

FWK-40A25F uses 20×127mm or 25×146mm package size.

Which standards and approvals apply to FWK-40A25F?

FWK-40A25F is listed under IEC 60269 / CE.

What is FWK-40A25F used for?

FWK-40A25F is listed for DC Bus Protection, Power conversion, Solar PV Protection, UPS systems applications. Verify suitability for your circuit before ordering.

What are the ordering terms for FWK-40A25F?

FWK-40A25F: typical lead time 12-16 weeks, minimum order 10 pcs. Submit a quote request for a firm quotation.

Data sources

Part number
FWK-40A25F
Brand
Eaton Bussmann
Last updated
2026-10-10
Canonical URL
https://fusestock.com/products/eaton-bussmann-fwk-40a25f/

Technical Specifications

Part Number
FWK-40A25F
Manufacturer Part Number
FWK-40A25F
Series
FWK Series (High Speed Fuse 750Vdc)
Fuse Type
High Speed Fuse
Current Rating
40A
Voltage Rating
750V DC
AC / DC
DC
Breaking Capacity
50kA @ 750V DC
Pre-arcing I²t
70.
Total I²t
250
Operating Temperature
-40°C to +125°C
Package / Dimensions
20×127mm or 25×146mm
Mounting
Bolt Mount · Fuse Holder
Application
DC Bus Protection · Power conversion · Solar PV Protection · UPS systems
Standard
IEC 60269
Terminal Type
Ferrule or Bolted
Fuse Speed
High Speed
Utilization Class
gG
Approvals
CE
Certifications
CE
Reference Lead Time
12-16 weeks
Minimum Order
10 pcs
Sample Status
Contact for Availability
Clearing I²t
250.
Watt Loss @ In
8.5W
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