Bussmann 170M8689 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5,481.85
Bussmann 170M8689 Eaton Series High-Speed Square Body Fuse, 230A, Class aR

Bussmann 170M8689 Eaton Series High-Speed Square Body Fuse, 230A, Class aR

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Model: 170M8689

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

$5,481.85
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Bussmann 170M8689 Eaton Series High-Speed Square Body Fuse, 230A, Class aR

The Bussmann 170M8689 is an Eaton series high-speed square body fuse engineered for the protection of power rectifiers and other semiconductor-based power electronics. Rated 230A at 4500V AC/DC, this Class aR fuse uses a square body design with flush end contacts for secure, reliable connections in demanding industrial circuits. A top fuse status indicator allows technicians to quickly verify fuse condition without interrupting the circuit, supporting faster maintenance and troubleshooting in high-voltage semiconductor protection applications.

Key Features

  • Amperage Rating: 230A for dependable overcurrent protection in high-power semiconductor circuits.
  • Voltage Rating: 4500V AC/DC rating suits high-voltage power rectifier and converter applications.
  • Square Body Construction: Square body with flush end contacts for a compact, secure mounting footprint.
  • Class aR Utilization Category: aR rating provides accompanied semiconductor protection for power rectifiers.
  • Top Fuse Status Indicator: Visual indicator simplifies fuse condition checks during inspection and maintenance.
  • High-Speed Operation: High-speed fuse design engineered specifically for fast-acting semiconductor circuit protection.
  • Application-Specific Design: Purpose-built for the protection of power rectifiers in industrial power electronics.

Technical Specifications

  • Amperage Rating: 230 A
  • Voltage Rating: 4500 V
  • Voltage Type: AC/DC
  • Utilization Category: aR (accompanied semiconductor protection)
  • Fuse Shape: Square body, flush end contacts
  • Application: Protection of power rectifiers
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Product Height: 90 mm
  • Product Length/Depth: 76 mm
  • Product Width: 362 mm
  • Product Weight: 746.4309952 g
  • Compliances: Contact factory

Typical Applications

  • Protection of Power Rectifiers
  • High-Voltage Semiconductor Protection Circuits
  • Industrial Power Electronics and Converters
  • Power Rectifier and Converter Assemblies
  • High-Speed Fuse Retrofits in Rectifier Systems

Why Bussmann?

Bussmann by Eaton engineers high-speed fuses for the demanding job of protecting sensitive power semiconductors, where fast, reliable interruption is critical to preventing costly downstream damage. The 170M8689's square body construction, flush end contacts, and top fuse status indicator reflect a design built for straightforward installation and quick field verification. For power rectifier protection where amperage, voltage, and utilization category must be matched precisely, Bussmann's Class aR high-speed fuse line delivers the accompanied semiconductor protection professional electrical teams rely on.

Manufacturer Resources

Product Specs

Amperage Rating:
230 A
Application:
Protection of power rectifiers
Class:
Class aR
Compliances:
Contact factory
Fuse Indicator:
Top fuse status indicator
Fuse Shape:
Square body, flush end contacts
Insulated Metal Gripping Lugs Imgl:
No
Packaging Type:
Standard
Product Height:
90 mm
Product Length Depth:
76 mm
Product Weight:
746.4309952 g
Product Width:
362 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
4500 V
Voltage Type:
AC/DC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M8689 – Frequently Asked Questions

1) Can the Bussmann 170M8689 fuse be used for general branch circuit or motor protection?
No. The 170M8689 is a Class aR high-speed fuse, and aR means accompanied semiconductor protection: it only covers short-circuit faults and has to be backed up by another device for overload protection. It's built for power rectifiers and semiconductor power electronics, not branch circuit or motor feeder duty. If you need overload plus short-circuit in one device, you want a gR/gS type or a standard branch circuit fuse instead.
2) Will a 230A Bussmann 170M8689 work on a 4160V or DC rectifier bus?
The 170M8689 is rated 4500V, and the rating is AC/DC, so it applies on either an AC supply or a DC link up to that voltage. Current rating is 230A. Match both the amperage and the voltage to the circuit; on high-speed semiconductor fuses the voltage rating cannot be derated informally between AC and DC the way some fuse families are, because this one is published for both.
3) What size opening and mounting space do I need for the 170M8689 square body fuse?
Plan the cabinet space around 90 mm, 76 mm and 362 mm (height, length/depth and width as published). That 362 mm figure is the long dimension, so this is a physically large square body fuse and it needs the bus bar centers laid out to suit before you commit to a panel layout. It also weighs about 746 g, so the bus work has to carry it.
4) How does the 170M8689 mount - does it have blade contacts or bolt-down lugs?
Square body with flush end contacts. Flush end contacts bolt directly to the bus bar or to fuse mounting blocks, rather than clipping into a fuse holder. It is supplied without insulated metal gripping lugs (IMGL), so if your assembly relies on gripping lugs for connection or for insulated handling, this is not the version you want.
5) Can maintenance tell if this Bussmann high-speed fuse has blown without pulling it out?
Yes. The 170M8689 carries a top fuse status indicator, so a technician can confirm the fuse state visually from the front of the assembly during an inspection walk instead of de-energizing and removing it. Note it is a top-mounted indicator, so the fuse has to be installed with that face accessible, and it is a visual indicator, not a microswitch output to a PLC.
6) Is the Bussmann 170M8689 UL listed or IEC certified?
For approvals on the 170M8689, Bussmann directs the question to the factory rather than publishing a blanket agency listing against this part. If your specification requires a named agency mark for the rectifier cabinet, get that confirmation in writing against the specific part number before it goes on a submittal.
7) Does the Bussmann 170M8689 ship in a special pack or a single unit?
Standard packaging, single fuse per part number 170M8689. There is no multi-pack or kit configuration behind this number, so an order quantity of one gets you one fuse. For MRO shelf stock on a rectifier line, size the spares count to the number of fuse positions in the stack, since a high-speed fuse cluster is usually replaced as a matched set after a fault.
How fast can I get the Bussmann 170M8689 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 170M8689 come with a warranty?
Absolutely. The Bussmann 170M8689 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 170M8689?
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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