Bussmann 170M-441 Series High-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,002.41
Bussmann 170M-441 Series High-Speed Class aR Square Body Fuse

Bussmann 170M-441 Series High-Speed Class aR Square Body Fuse

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Model: 170M4558

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

$1,002.41
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Bussmann 170M-441 Series High-Speed Class aR Square Body Fuse

The Bussmann 170M-441 Series is an Eaton Bussmann high-speed square body fuse built for accompanied semiconductor protection (Class aR), with a flush end-contact design and a top-mounted fuse status indicator for fast visual condition checks. Rated 700V (UL) / 690V (IEC) with a 200kAIC interrupting rating, this series is available in amp ratings from 200A to 900A (200A, 400A, 450A, 630A, and 900A) to cover a range of power electronics and industrial protection requirements.

Key Features

  • Amp Rating Range: Offered in 200A, 400A, 450A, 630A, and 900A ratings to match the protection level required by the application.
  • Voltage Rating: 700V (UL) / 690V (IEC) rating suited for semiconductor and power conversion circuits.
  • Interrupting Rating: 200kAIC interrupting rating for reliable performance under high fault-current conditions.
  • Utilization Category: Class aR (accompanied semiconductor protection) for use alongside semiconductor devices such as SCRs and diodes.
  • Fuse Shape: Square body construction with flush end contacts for compact, space-saving mounting.
  • Fuse Status Indicator: Top-mounted indicator provides quick visual confirmation of fuse condition without removal.
  • Compliance: CE Marked for use in applications requiring European compliance marking.

Certifications & Compliance

  • CE Marked
  • Rated 700V per UL requirements
  • Rated 690V per IEC requirements

Technical Specifications

  • Utilization Category: aR (accompanied semiconductor protection)
  • Packaging Type: Standard
  • Fuse Shape: Square body, flush end contacts
  • Insulated Metal Gripping Lugs (Imgl): No
  • Compliances: CE Marked

Typical Applications

  • Semiconductor Protection Circuits
  • Variable Frequency Drives and Power Conversion Equipment
  • Industrial Motor Control Panels
  • High Fault-Current Power Distribution Systems
  • Panelboard and Switchgear Protection

Why Bussmann?

Bussmann high-speed fuses are built to protect sensitive semiconductor components with a Class aR utilization category, a 200kAIC interrupting rating, and dual 700V (UL) / 690V (IEC) voltage ratings for demanding power electronics environments. The top-mounted fuse status indicator and CE-marked, flush-contact square body design help electrical professionals verify fuse condition quickly and maintain code-compliant, reliable protection across the 200A-900A range.

Manufacturer Resources

Product Specs

Product Group:
Fuses
Class:
Class aR
Utilization Category:
aR (accompanied semiconductor protection)
Packaging Type:
Standard
Product Type:
Fuse
Interrupt Rating:
200 kAIC
Fuse Shape:
Square body, flush end contacts
Product Details:
Fuse
Insulated Metal Gripping Lugs Imgl:
No
Product Subgroup:
Other Fuses
Mounting Method:
Flush
Compliances:
CE Marked
Department:
Electrical
Fuse Indicator:
Top fuse status indicator
Voltage Rating:
700V (UL) / 690V (IEC)
Amperage Rating:
200A - 900A
Standards:
CE Marked
Configuration:
Square Body, Flush End Contacts

Bussmann 170M4558 – Frequently Asked Questions

1) Is the Bussmann 170M-441 fuse a gR or aR type, and what does that mean for protecting my drive?
It's an aR fuse, meaning accompanied semiconductor protection. The 170M-441 only handles short-circuit protection for the semiconductors (SCRs, diodes, IGBT stacks); it does not provide overload protection. You need a separate overload device, usually the drive's own electronic overload or an upstream breaker, in the circuit. If you want a fuse that covers both overload and short circuit on its own, an aR fuse is the wrong choice.
2) What amp ratings does the Bussmann 170M-441 square body fuse come in, and what are the part numbers?
Five ratings across the 200A to 900A range: 200A is 170M4558, 400A is 170M4412, 450A is 170M4413, 630A is 170M4416, and 900A is 170M4419. All share the same 700V (UL) / 690V (IEC) rating and 200 kAIC interrupting rating, so amp rating is the only thing you're selecting on.
3) Can I use this 700V fuse on a 480V or 600V industrial system?
Yes. The 170M-441 series is rated 700V under UL and 690V under IEC, so it covers 480V and 600V AC systems. Fuse voltage ratings are a ceiling, not a target, so applying it below its rating is normal practice. What you cannot do is use it above 700V on a UL-governed installation.
4) Does the Bussmann 170M-441 have gripping lugs or flush contacts, and how does it mount?
Flush mounting with a square body and flush end contacts, bolted directly to the busbar or fuse base. It does not have insulated metal gripping lugs (IMGL), so if your existing installation uses a lug-style square body fuse or a clip-in holder, this one will not drop in. Confirm your base is set up for flush bolted end contacts.
5) Can I substitute a Class J or Class T fuse for the 170M-441 in a drive?
No. The 170M-441 is a high-speed semiconductor fuse in the aR utilization category, built to clear fast enough to save SCRs and diodes. Class J and Class T branch-circuit fuses are far slower on a let-through basis and will let the semiconductor fail first. Replace a high-speed square body fuse with another high-speed square body fuse of matching amp rating, voltage, and mounting.
6) Will this fuse hold up on a service with high available fault current?
The 170M-441 carries a 200 kAIC interrupting rating, which covers essentially any available fault current you'll see on an industrial service or switchgear lineup. That's the number to compare against the available short-circuit current stamped on your one-line or calculated for the panel.
7) How do I tell if a 170M-441 fuse has blown without pulling it out of the holder?
There's a fuse status indicator on the top of the body. A visual check through the panel door or at the stack tells you the condition, so troubleshooting a drive lockout doesn't mean de-energizing and removing fuses one at a time. Note it's a visual indicator on this series, not a microswitch output.
8) How is the 170M-441 packaged, and do I have to buy a set of three?
Packaging is standard, and the fuses are sold by individual part number per amp rating, not as matched three-packs. On a three-phase drive you'll order three of the same number, for example three 170M4416 for a 630A application.
How fast can I get the Bussmann 170M4558 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 170M4558 come with a warranty?
Absolutely. The Bussmann 170M4558 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 170M4558?
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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