Bussmann 170M3990 Eaton Series...
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$1,017.56
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Bussmann 170M3990 Eaton Series High-Speed Square Body Fuse, Class aR, 350A

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Model: 170M3990

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

$1,017.56
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Bussmann 170M3990 Eaton Series High-Speed Square Body Fuse, Class aR, 350A

The Bussmann 170M3990 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding industrial power circuits. Rated 700V (UL) / 690V (IEC) with a 350A amperage rating and a 150 kAIC interrupt rating, this Class aR fuse is built to DIN 43 620 dimensions and features a top fuse status indicator for quick visual confirmation of fuse condition. As an accompanied semiconductor protection device (Utilization Category aR), it is designed to work alongside upstream overcurrent protection to safeguard sensitive power semiconductor components in industrial drives and power electronics.

Key Features

  • Square Body Design: Square body fuse with slotted, center bolted tags built to DIN 43 620 dimensions for standardized mounting.
  • Dimensions: Measures 305 mm in length/depth, 145 mm in width, and 65 mm in height, with a weight of 319 g.
  • Voltage Rating: Rated 700V (UL) / 690V (IEC), with an additional 1000V AC voltage rating for high-voltage industrial systems.
  • Amperage Rating: 350A continuous current rating sized for protecting power semiconductor circuits.
  • Interrupt Rating: 150 kAIC interrupting rating delivers high fault-current clearing capability.
  • Utilization Category aR: Accompanied semiconductor protection fuse (aR) designed for use alongside upstream backup protection.
  • Top Fuse Status Indicator: Built-in visual indicator allows quick identification of a blown fuse without disconnecting circuits.
  • Performance Data: Pre-arc I²t rating of 29000 and clearing I²t rating of 175000 at 1000V, with watt losses of 65W.

Certifications & Compliance

  • IEC Rated
  • CE Marked

Technical Specifications

  • Amperage Rating: 350 A
  • Application: semiconductor protection
  • Certifications: IEC Rated
  • Clearing I2t: 175000 at 1000 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, slotted center bolted tags
  • Insulated Metal Gripping Lugs (Imgl): No
  • Packaging Type: Standard
  • Pre Arc I2t: 29000
  • Product Height: 65 mm
  • Product Length Depth: 305 mm
  • Product Weight: 319 g
  • Product Width: 145 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 1000 V
  • Voltage Type: AC
  • Watt Losses: 65 W

Typical Applications

  • Semiconductor Protection
  • Industrial Power Electronics
  • Variable Frequency Drive (VFD) and Motor Drive Circuits
  • High-Speed Circuit Protection for Power Semiconductors
  • Switchgear and Panelboard Overcurrent Protection

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170M3990 reflects that standard with its DIN 43 620 square body construction, CE marked and IEC rated compliance, and documented pre-arc and clearing I²t performance data. For engineers and electricians protecting sensitive power semiconductor equipment, this Class aR high-speed fuse delivers dependable, code-compliant performance built for demanding industrial environments.

Manufacturer Resources

Product Specs

Amperage Rating:
350 A
Application:
semiconductor protection
Certifications:
IEC Rated
Class:
Class aR
Clearing I2t:
175000 at 1000 V
Compliances:
CE Marked
Fuse Indicator:
Top fuse status indicator
Fuse Shape:
Square body, slotted center bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
150 kAIC
Mounting Method:
DIN 43 620
Packaging Type:
Standard
Pre Arc I2t:
29000
Product Height:
65 mm
Product Length Depth:
305 mm
Product Weight:
319 g
Product Width:
145 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1000 V
Voltage Type:
AC
Watt Losses:
65 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M3990 – Frequently Asked Questions

How fast can I get the Bussmann 170M3990 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 170M3990 come with a warranty?
Absolutely. The Bussmann 170M3990 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 170M3990?
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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