Bussmann 170M4443 High Speed S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,607.38
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Bussmann 170M4443 High Speed Square Body Fuse, 400A Class aR

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Model: 170M4443

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,607.38
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Bussmann 170M4443 High Speed Square Body Fuse, 400A Class aR

The Bussmann 170M4443 is an Eaton Bussmann series high speed square body fuse engineered for demanding power electronics circuits. Rated 700V (UL) and 690V (IEC) with a 1250V voltage rating, this 400A fuse delivers a 100 kAIC interrupting rating and is classified aR for accompanied semiconductor protection. Its square body design with flush end contacts supports compact panel and busbar mounting in industrial power conversion equipment.

Key Features

  • Amperage Rating: 400A for dependable overcurrent protection in high-power circuits.
  • Voltage Rating: Rated 700V (UL) and 690V (IEC), with a 1250V voltage rating for demanding industrial power systems.
  • Interrupting Rating: 100 kAIC interrupting capacity for reliable performance under high fault-current conditions.
  • Fuse Shape: Square body construction with flush end contacts for space-saving, compact installation.
  • Utilization Category: Class aR (accompanied semiconductor protection), purpose-built for protecting power semiconductor devices.
  • Clearing I2t: 175,000 A²s at 1000V and 235,000 A²s at 1250V for precise coordination with semiconductor let-through limits.
  • Pre-Arc I2t: 29,500 A²s.
  • Watt Losses: 75W.

Certifications & Compliance

  • IEC Rated
  • CE Marked

Technical Specifications

  • Amperage Rating: 400 A
  • Application: semiconductor protection
  • Certifications: IEC Rated
  • Clearing I2t: 175000 at 1000 V, 235000 at 1250 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, flush end contacts
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Pre Arc I2t: 29500
  • Product Height: 51 mm
  • Product Length Depth: 160 mm
  • Product Weight: .573 g
  • Product Width: 70 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 1250 V
  • Voltage Type: AC
  • Watt Losses: 75 W

Typical Applications

  • Semiconductor Protection
  • Power Electronics and Converter Circuits
  • Industrial Motor Drives and Rectifiers
  • High-Speed Overcurrent Protection Systems
  • Panelboard and Switchgear Fault Protection

Why Bussmann?

Bussmann high speed square body fuses are engineered to IEC ratings and CE marked for verified compliance in global industrial installations. The Class aR utilization category and precisely specified clearing and pre-arc I2t values give engineers the coordination data needed to protect sensitive power semiconductor devices with confidence. With a 100 kAIC interrupting rating and 400A capacity, the 170M4443 delivers the reliable, code-compliant performance professional electrical and power electronics installations demand.

Manufacturer Resources

Product Specs

Amperage Rating:
400 A
Application:
semiconductor protection
Certifications:
IEC Rated
Class:
Class aR
Clearing I2t:
175000 at 1000 V, 235000 at 1250 V
Compliances:
CE Marked
Fuse Indicator:
Other
Fuse Shape:
Square body, flush end contacts
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
100 kAIC
Mounting Method:
Flush
Packaging Type:
Standard
Pre Arc I2t:
29500
Product Height:
51 mm
Product Length Depth:
160 mm
Product Weight:
.573 g
Product Width:
70 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1250 V
Voltage Type:
AC
Watt Losses:
75 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M4443 – Frequently Asked Questions

How fast can I get the Bussmann 170M4443 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann 170M4443 come with a warranty?
Absolutely. The Bussmann 170M4443 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann 170M4443?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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