Bussmann 170M5957 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,470.36
Image coming soon

Bussmann 170M5957 Eaton Series High-Speed Square Body Fuse, Class aR, 500A

(No reviews yet) Write a Review

Model: 170M5957

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

$1,470.36
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Bussmann 170M5957 Eaton Series High-Speed Square Body Fuse, Class aR, 500A

The Bussmann 170M5957 is an Eaton series high-speed square body fuse engineered for semiconductor protection, rated 700V (UL) / 690V (IEC), 500A, with a 150 kAIC interrupt rating. Built to Class aR utilization (accompanied semiconductor protection), this fuse features a square body design with flush end contacts for compact, high-density panel mounting. It is UL Recognized and CE Marked, supporting demanding industrial power electronics applications where fast-acting, coordinated overcurrent protection is critical.

Key Features

  • Amperage Rating: 500A for high-current semiconductor circuit protection.
  • Voltage Rating: 700V (UL), 690V (IEC) dual-standard rating for global system compatibility.
  • Interrupt Rating: 150 kAIC delivers high fault-current interrupting capacity.
  • Class aR Utilization: accompanied semiconductor protection per its utilization category.
  • Fuse Shape: Square body construction with flush end contacts for space-saving panel installation.
  • Application: Purpose-built for semiconductor protection in power electronics equipment.
  • I2t Characteristics: Pre-arc I2t of 49500 and clearing I2t of 295000 at 1000V for precise coordination.
  • Watt Losses: 95W power dissipation rating.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Amperage Rating: 500 A
  • Application: semiconductor protection
  • Certifications: UL Recognized
  • Clearing I2t: 295000 at 1000 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, flush end contacts
  • Insulated Metal Gripping Lugs (Imgl): No
  • Packaging Type: Standard
  • Pre Arc I2t: 49500
  • Product Height: 80 mm
  • Product Length Depth: 168 mm
  • Product Weight: 751.25 g
  • Product Width: 124 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 1000 V
  • Voltage Type: AC
  • Watt Losses: 95 W

Typical Applications

  • Semiconductor Protection
  • High-Speed Power Electronics Circuits
  • Industrial Motor Drive Systems
  • Class aR Accompanied Fuse Protection Schemes

Why Bussmann?

Bussmann by Eaton engineers circuit protection products to strict performance standards, and the 170M5957 reflects that with UL Recognized, CE Marked construction, a 150 kAIC interrupt rating, and precisely specified pre-arc and clearing I2t values for coordinated semiconductor protection. Choose Bussmann for dependable, code-compliant overcurrent protection in demanding industrial power electronics environments.

Manufacturer Resources

Product Specs

Amperage Rating:
500 A
Application:
semiconductor protection
Certifications:
UL Recognized
Class:
Class aR
Clearing I2t:
295000 at 1000 V
Compliances:
CE Marked
Fuse Indicator:
Other
Fuse Shape:
Square body, flush end contacts
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
150 kAIC
Mounting Method:
Flush
Packaging Type:
Standard
Pre Arc I2t:
49500
Product Height:
80 mm
Product Length Depth:
168 mm
Product Weight:
751.25 g
Product Width:
124 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1000 V
Voltage Type:
AC
Watt Losses:
95 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M5957 – Frequently Asked Questions

1) Is the Bussmann 170M5957 the right fuse for protecting IGBTs and diodes in a drive, or should I use a standard industrial fuse?
This is a high-speed semiconductor fuse, not a general-purpose branch circuit fuse. Its utilization category is aR, meaning accompanied semiconductor protection: it clears short circuits fast enough to protect silicon, but it is not intended to carry overload protection duty on its own, so another device has to handle overloads in the circuit. If you are protecting motor branch circuits or general feeders, a standard time-delay class fuse is the correct part instead.
2) What voltage and current is the Bussmann 170M5957 square body fuse rated for?
It is a 500 amp fuse rated 700V under UL and 690V under IEC, which is what lets the same part number be specified on equipment built for either market. Fault interrupting capacity is 150 kAIC, so it can be applied on high available fault current industrial services.
3) Will a 170M5957 fit in my existing fuse holder or does it bolt into the panel?
The 170M5957 is a square body fuse with flush end contacts and flush mounting, so it bolts directly to busbar or flat terminal pads rather than clipping into a holder. It does not have insulated metal gripping lugs, so plan on bolted connections and allow for a body measuring 168 x 124 x 80 mm when you lay out clearances.
4) What I2t values do I need to coordinate this 500A high-speed fuse with my semiconductor?
Pre-arc I2t is 49,500 and total clearing I2t is 295,000 at 1000 V. Compare the clearing value against the I2t withstand of the diode or thyristor you are protecting: the device rating has to exceed 295,000 for the fuse to save it under a bolted fault. Those figures are also what you use when checking selectivity against upstream protection.
5) How much heat does the Bussmann 170M5957 put into the enclosure?
Rated watt loss is 95 W at full load. That is real heat inside a sealed cabinet, so it has to go into your thermal calculation along with the drive and any other fuses on the same bus. Packed enclosures often need forced ventilation or fuse derating when several of these run near rated current.
6) Is the Bussmann 170M5957 UL listed and CE marked for export equipment?
It is UL Recognized and CE Marked. UL Recognition means it is approved as a component within listed equipment rather than as a standalone listed device, which is the normal status for square body semiconductor fuses used inside drives and power converters.
7) Does the 170M5957 have a blown fuse indicator or microswitch for remote alarm?
Indication on this fuse is a non-standard type rather than the common striker pin or microswitch option, so do not assume a striker will trip an alarm switch on your holder. If your panel relies on a microswitch signal for fuse monitoring, confirm the indicator style matches before you commit to a bolted-in replacement.
How fast can I get the Bussmann 170M5957 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 170M5957 come with a warranty?
Absolutely. The Bussmann 170M5957 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 170M5957?
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
Why buy the Bussmann 170M5957 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!