Bussmann 170M-476 High Speed S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,038.06
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Bussmann 170M-476 High Speed Square Body Fuse, Class aR, M4 Case, 350A

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Model: 170M4761

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

$1,038.06
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Bussmann 170M-476 High Speed Square Body Fuse, Class aR

The Bussmann 170M-476 High Speed Square Body Fuse is an Eaton Bussmann series fuse engineered specifically for semiconductor protection, rated 1000V and 350A with a 200 kAIC interrupt rating. Housed in the compact M4 case with a square body and center-bolted blade end X blade end tags, this Class aR fuse is designed to protect power semiconductor devices in demanding industrial power circuits. CE Marked for compliance, it delivers dependable high-speed current-limiting protection for professional electrical and industrial installations where semiconductor components must be safeguarded from fault currents.

Key Features

  • Case Size: M4 case with a compact 52 mm product height, suited to space-constrained fuse holders and enclosures.
  • Square Body Construction: Square body design with center-bolted tags for a secure, low-resistance mechanical and electrical connection.
  • Blade End X Blade End Terminals: Blade-to-blade terminal configuration engineered for reliable seating in compatible high speed fuse holders.
  • Electrical Rating: Rated 1000V and 350A with a 200 kAIC interrupt rating for demanding high-power semiconductor circuits.
  • Voltage Type: AC voltage rated at 690V per the fuse's rated voltage classification.
  • Class aR Utilization: Classified aR (accompanied semiconductor protection), intended for use alongside dedicated semiconductor protection devices rather than as standalone branch-circuit protection.
  • Application: Purpose-built for semiconductor protection in industrial power conversion and drive equipment.
  • Packaging: Supplied in standard packaging for straightforward stocking and distribution.

Certifications & Compliance

  • CE Marked

Technical Specifications

  • Application: semiconductor protection
  • Utilization Category: aR (accompanied semiconductor protection)
  • Product Height: 52 mm
  • Voltage Type: AC
  • Voltage Rating: 690V
  • Insulated Metal Gripping Lugs Imgl: No
  • Packaging Type: Standard
  • Fuse Shape: Square body, center bolted tags
  • Compliances: CE Marked

Typical Applications

  • Semiconductor Protection Circuits
  • Power Conversion and Rectifier Equipment
  • Industrial Motor Drive Systems
  • High Speed Circuit Protection Panels
  • Blade-End Fuse Holder Assemblies Rated for Class aR Fuses

Why Bussmann?

Bussmann fuses from Eaton are engineered for precise, high-speed clearing in demanding industrial power circuits. The 170M-476's square body construction, center-bolted blade end X blade end tags, M4 case sizing, and CE Marked compliance make it a dependable choice for semiconductor protection applications where reliability and consistent performance under fault conditions are essential.

Manufacturer Resources

Product Specs

Product Details:
Fuse
Application:
semiconductor protection
Utilization Category:
aR (accompanied semiconductor protection)
Product Type:
Fuse
Product Height:
52 mm
Connection:
Blade end x blade end
Interrupt Rating:
200 kAIC
Product Group:
Fuses
Voltage Type:
AC
Voltage Rating:
690V
Product Subgroup:
Other Fuses
Insulated Metal Gripping Lugs Imgl:
No
Class:
Class aR
Packaging Type:
Standard
Fuse Indicator:
Other
Fuse Shape:
Square body, center bolted tags
Department:
Electrical
Compliances:
CE Marked

Bussmann 170M4761 – Frequently Asked Questions

1) What amp ratings does the Bussmann 170M-476 square body fuse come in?
The 170M-476 family covers six ratings: 350A (170M4761), 450A (170M4763), 500A (170M4764), 550A (170M4765), 630A (170M4766) and 700A (170M4767). All share the same M4 square body case with center bolted tags, so the holder and mounting centers stay the same as you move up or down the range. Order by the part number that matches your amp rating, since the base 170M-476 designation alone does not identify the rating.
2) Can I use a Class aR fuse like the Bussmann 170M-476 as the branch circuit protection on a drive?
No. The 170M-476 is utilization category aR, meaning accompanied semiconductor protection. It clears short circuits only and is intended to sit alongside a separate device that handles overload and branch circuit protection, not to replace it. If you need a fuse that handles both overload and short circuit duty in one, you want a gR or gS type rather than this one.
3) Will the Bussmann 170M-476 bolt into my existing high speed fuse holder?
It depends on what your holder accepts. The 170M-476 is a square body fuse with blade end x blade end terminals and center bolted tags, so it needs a holder or busbar arrangement prepped for bolt-in blade tags, not a clip style or cylindrical ferrule holder. The body is the M4 case size with a 52 mm product height, so confirm your enclosure has that clearance before ordering.
4) What fault current can the 170M-476 semiconductor fuse interrupt?
The interrupt rating on the 170M-476 is 200 kAIC. That covers it for the high available fault current found at rectifier and drive input sections in industrial power conversion equipment, which is the duty this fuse is built for. Check that against the calculated available fault current at your point of installation.
5) Does the Bussmann 170M-476 have insulated metal gripping lugs?
No, this one is supplied without IMGL. The tags are bare blade ends for bolting directly to the holder or busbar. If your panel spec calls for insulated gripping lugs for handling or touch safety, you need a different variant of the 170M range, because this version will not satisfy that requirement.
6) Is the Bussmann 170M-476 fuse acceptable for a machine being built to CE requirements?
The 170M-476 is CE Marked, which is the compliance mark carried on this fuse. That is the mark to cite on export machinery documentation for equipment shipping into markets that require it.
7) Does the 170M-476 high speed fuse have a blown fuse indicator for a microswitch?
The indicator type on the 170M-476 is listed as Other, so it is not a standard striker pin version and you should not plan a microswitch trip off it. If your panel design relies on a mechanical indicator driving a switch for fuse monitoring, specify a 170M variant that explicitly carries an indicator and striker.
8) What kind of equipment is the Bussmann 170M-476 normally installed in?
It is a semiconductor protection fuse, so it typically lands in power conversion and rectifier equipment, industrial motor drive systems, and high speed protection panels where SCRs, diodes or IGBTs need to be cleared faster than a conventional fuse can manage. It is not a fuse for general lighting, feeder, or branch circuit work.
How fast can I get the Bussmann 170M4761 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 170M4761 come with a warranty?
Absolutely. The Bussmann 170M4761 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 170M4761?
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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