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Bussmann 170M3966 63A 1000V AC 170M high-speed square-body fuse
Eaton Bussmann

Bussmann 170M3966 63A 1000V AC 170M high-speed square-body fuse

Part Number: 170M3966

● LT: 4-6w

Eaton Bussmann 170M3966, 63A, 1000V AC, Class aR; interrupting rating 125kA RMS Sym. @ 1000V AC.

Rated Current63A
Rated Voltage1000V AC
Breaking Capacity125kA RMS Sym. @ 1000V AC
PackageDIN 43 653 Size 1*
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Eaton Bussmann 170M3966 is a 170M Class aR high-speed square-body fuse rated 63A at 1000V AC. Interrupting rating: 125kA RMS Sym. @ 1000V AC. Typical application: DC common bus|DC drives|Power converters/rectifiers|Reduced voltage starters. Standard(s): IEC 60269-4|UL 248-13.

Quick answer, specifications & FAQ
Direct answer

Eaton Bussmann High-Speed Square Body Fuse 170M3966 is rated 63A, 1000V AC, High Speed, DIN 43 653 Size 1*. Breaking capacity 125kA RMS Sym. @ 1000V AC, I²t 1,300 A²s, operating temperature -40°C to +125°C, certifications UL Recognized|IEC 60269-4|CE. Listed applications: DC Bus Protection, Motor Drives, Motor Starters, Power conversion. Standards: IEC 60269-4, UL 248-13. Eaton Bussmann 170M3966, 63A, 1000V AC, Class aR; interrupting rating 125kA RMS Sym. @ 1000V AC.

Last updated 23 days ago

Key specifications

  • Part number: 170M3966
  • Brand: Eaton Bussmann
  • Rated current: 63A
  • Rated voltage: 1000V AC
  • Breaking capacity: 125kA RMS Sym. @ 1000V AC
  • Fuse speed: High Speed
  • Package size: DIN 43 653 Size 1*
  • Dimensions: DIN 43 653 Size 1* (per datasheet)
  • Terminal type: Bolted tag (KN/110)
  • Operating temperature: -40°C to +125°C
  • Certifications: UL Recognized|IEC 60269-4|CE
  • Standards: IEC 60269-4, UL 248-13

Frequently asked questions

What are the current and voltage ratings of 170M3966?

170M3966 is rated 63A at 1000V AC.

What is the breaking capacity of 170M3966?

170M3966 has a breaking capacity of 125kA RMS Sym. @ 1000V AC. Confirm this covers the available fault current at the installation point.

What package size does 170M3966 use?

170M3966 uses DIN 43 653 Size 1* package size.

Which standards and approvals apply to 170M3966?

170M3966 is listed under IEC 60269-4, UL 248-13 / UL Recognized|IEC 60269-4|CE.

What is 170M3966 used for?

170M3966 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 170M3966?

170M3966: typical lead time 4–6 weeks, minimum order 10 pcs. Submit a quote request for a firm quotation.

Data sources

Part number
170M3966
Brand
Eaton Bussmann
Last updated
2026-10-10
Canonical URL
https://fusestock.com/products/eaton-bussmann-170m3966/

Technical Specifications

Part Number
170M3966
Manufacturer Part Number
170M3966
Series
170M Series (1000V AC DIN 43 653)
Fuse Type
High-Speed Square Body Fuse
Current Rating
63A
Voltage Rating
1000V AC
AC / DC
AC
Breaking Capacity
125kA RMS Sym. @ 1000V AC
I²t
1,300 A²s
Pre-arcing I²t
215 A²s
Total I²t
1300
Operating Temperature
-40°C to +125°C
Package / Dimensions
DIN 43 653 Size 1*
Mounting
Stud Mount
Application
DC Bus Protection · Motor Drives · Motor Starters · Power conversion
Standard
IEC 60269-4 · UL 248-13
Terminal Type
Bolted tag (KN/110)
Fuse Speed
High Speed
Utilization Class
aR
Approvals
CE · UL Recognized
Certifications
UL Recognized|IEC 60269-4|CE
Reference Lead Time
4–6 weeks
Minimum Order
10 pcs
Sample Status
Contact for Availability
Clearing I²t @ 1000V
1,300 A²s
Watt Loss @ In
25W
Data Sheet
170K8564
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