Bussmann 170M5289 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,616.58
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Bussmann 170M5289 Eaton Series High-Speed Square Body Fuse, Class aR, 800A

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Model: 170M5289

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

$2,616.58
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Bussmann 170M5289 Eaton Series High-Speed Square Body Fuse, Class aR, 800A

The Bussmann 170M5289 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding industrial power applications. Rated 700V (UL) and 690V (IEC) with an 800A amperage rating and a 100 kAIC interrupt rating, this Class aR fuse is designed for accompanied semiconductor protection where fast, reliable circuit interruption is critical. The square body design with slotted center bolted tags supports secure, high-current connections in power electronics and drive systems.

Key Features

  • Amperage Rating: 800A for high-current semiconductor circuit protection.
  • Voltage Rating: 700V (UL) / 690V (IEC), suitable for AC voltage systems.
  • Interrupt Rating: 100 kAIC for reliable performance under high fault-current conditions.
  • Utilization Category: Class aR, providing accompanied semiconductor protection alongside a coordinated protective device.
  • Fuse Shape: Square body construction with slotted center bolted tags for secure high-current terminations.
  • Compact Footprint: Product dimensions of 280 mm length/depth x 180 mm width x 65 mm height.
  • Voltage Type: AC-rated for industrial power distribution systems.

Certifications & Compliance

  • Voltage rated to both UL (700V) and IEC (690V) standards.

Technical Specifications

  • Amperage Rating: 800 A
  • Application: semiconductor protection
  • Compliances: Contact factory
  • Fuse Shape: Square body, slotted center bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Product Height: 65 mm
  • Product Length Depth: 280 mm
  • Product Weight: 657.33 g
  • Product Width: 180 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 1250 V
  • Voltage Type: AC

Typical Applications

  • Semiconductor Device Protection
  • High-Speed Fusing for Power Electronics
  • Industrial and Commercial Power Distribution Systems
  • AC Voltage Circuit Protection
  • Coordinated Protection Alongside Other Circuit Protective Devices

Why Bussmann?

The Bussmann 170M5289 reflects Eaton Bussmann's engineering standard for high-speed semiconductor fuses, combining a robust square body construction, slotted center bolted tag connections, and a 100 kAIC interrupt rating to deliver dependable, code-aware performance in demanding industrial electrical systems. As a Class aR fuse rated to both UL and IEC voltage standards, it's built for professionals who need consistent, high-current circuit protection.

Manufacturer Resources

Product Specs

Amperage Rating:
800 A
Application:
semiconductor protection
Class:
Class aR
Compliances:
Contact factory
Fuse Indicator:
Other
Fuse Shape:
Square body, slotted center bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
100 kAIC
Packaging Type:
Standard
Product Height:
65 mm
Product Length Depth:
280 mm
Product Weight:
657.3333333 g
Product Width:
180 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1250 V
Voltage Type:
AC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M5289 – Frequently Asked Questions

1) What does the Class aR rating on the Bussmann 170M5289 fuse mean for how I apply it?
Class aR is partial-range, or accompanied, semiconductor protection. The 170M5289 clears high fault currents fast enough to protect semiconductors, but it does not cover the low-level overload range on its own, so it has to work alongside a coordinated protective device such as a breaker or overload relay that handles sustained overcurrents. If you need a fuse that covers the full range by itself, you want a gR/gS type instead.
2) Can I use the 170M5289 as the branch circuit or short-circuit protective device for a motor feeder?
It is an 800 A AC high-speed fuse built for semiconductor protection, meaning SCRs, IGBTs, diode bridges and the DC link hardware in drives and rectifiers. Conventional motor branch circuit protection uses a time-delay class fuse or breaker sized for motor inrush. A high-speed aR fuse is deliberately fast and is applied in addition to that device, not in place of it.
3) Does the Bussmann 170M5289 come with insulated gripping lugs for hot handling?
No, the 170M5289 is supplied without insulated metal gripping lugs (IMGL). It is a plain bolted-tag body, so removal and replacement is a de-energized, unbolt-the-tags job rather than a pull-by-the-handle operation.
4) How much space do I need to allow in the enclosure for the Bussmann 170M5289 fuse?
Allow for a body measuring 280 mm length/depth by 180 mm width by 65 mm height, plus clearance for the bolted tag connections and cable bends on each end. It weighs roughly 657 g, so the mounting arrangement carries the load through the bolted tags rather than needing separate support in most panel installs.
5) Is there a blown fuse indicator or microswitch on the Bussmann 170M5289?
The indicator type on the 170M5289 is listed as Other, not a standard striker pin or microswitch option. If your panel design relies on a remote trip or alarm contact off the fuse, verify the indicating arrangement against the configuration you are replacing before you commit to this part number.
6) What part number do I order and how does the 170M5289 ship?
Order by Bussmann manufacturer part number 170M5289, an Eaton Bussmann series high-speed square body fuse. Packaging is standard, so it is a single-fuse item rather than a multi-pack. On a three-phase rectifier or drive you will normally need one per phase leg, so count the positions before ordering.
How fast can I get the Bussmann 170M5289 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 170M5289 come with a warranty?
Absolutely. The Bussmann 170M5289 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 170M5289?
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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