Bussmann 170M4540 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,457.00
Image coming soon

Bussmann 170M4540 Eaton Series High-Speed Square Body Fuse, Class aR, 630A

(No reviews yet) Write a Review

Model: 170M4540

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

$1,457.00
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 170M4540 Eaton Series High-Speed Square Body Fuse, Class aR, 630A

The Bussmann 170M4540 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 1300V (UL) and 1250V (IEC) with a 630A amperage rating and a 125 kAIC interrupting rating, this Class aR fuse is designed to safeguard semiconductor devices from damaging fault currents. The square body construction with center bolted tags provides a robust, low-impedance connection suited for high-speed, high-current circuit protection.

Key Features

  • Amperage Rating: 630A for reliable protection of high-current semiconductor circuits.
  • Voltage Rating: 1300V (UL) / 1250V (IEC) for use in demanding high-voltage power electronics systems.
  • Interrupting Rating: 125 kAIC delivers high fault-current interrupting capability.
  • Fuse Class: Class aR (accompanied semiconductor protection) for use alongside semiconductor devices requiring high-speed fault clearing.
  • Fuse Shape: Square body with center bolted tags for a secure, low-resistance connection.
  • Application: Purpose-built for semiconductor protection in power conversion equipment.

Certifications & Compliance

  • IEC Rated
  • CE Marked

Technical Specifications

  • Amperage Rating: 630 A
  • Application: semiconductor protection
  • Certifications: IEC Rated
  • Clearing I2t: 755000 at 1000 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, center bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Pre Arc I2t: 125000
  • Product Height: 52 mm
  • Product Length Depth: 170 mm
  • Product Weight: 622 g
  • Product Width: 72 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 1000 V
  • Voltage Type: AC
  • Watt Losses: 98 W

Typical Applications

  • Semiconductor Protection
  • Power Electronics and Drive Systems
  • High-Speed Fault Current Protection
  • Industrial Power Conversion Equipment
  • Commercial and Industrial Electrical Systems

Why Bussmann?

Bussmann by Eaton engineers the 170M4540 high-speed square body fuse with a robust center-bolted-tag construction, a 125 kAIC interrupting rating, and Class aR performance for accompanied semiconductor protection. Backed by IEC rating and CE marking, this fuse delivers dependable, code-compliant protection for demanding power electronics and industrial applications where fast, reliable fault clearing is essential.

Manufacturer Resources

Product Specs

Amperage Rating:
630 A
Application:
semiconductor protection
Certifications:
IEC Rated
Class:
Class aR
Clearing I2t:
755000 at 1000 V
Compliances:
CE Marked
Fuse Indicator:
Other
Fuse Shape:
Square body, center bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
125 kAIC
Packaging Type:
Standard
Pre Arc I2t:
125000
Product Height:
52 mm
Product Length Depth:
170 mm
Product Weight:
622 g
Product Width:
72 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
1000 V
Voltage Type:
AC
Watt Losses:
98 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M4540 – Frequently Asked Questions

1) Will the Bussmann 170M4540 protect a semiconductor drive, or do I need a standard industrial fuse?
The 170M4540 is a high-speed semiconductor fuse, utilization category aR (accompanied semiconductor protection). That means it clears fast enough to protect diodes, thyristors and IGBTs against short circuits, but it is not the device for overload protection on a motor or feeder circuit. In an aR application the fuse works alongside another protective device that handles overload; the fuse handles the fault current. Rated 630 A with a 125 kAIC interrupting rating.
2) What voltage can the 170M4540 square body fuse be used at?
Rated 1300 V under UL and 1250 V under IEC, with an AC rating of 1000 V on the spec data. It is an AC device, so do not apply it to a DC link or DC bus without a DC-rated part. The published I2t figures are referenced at 1000 V.
3) What I2t values do I need for coordinating the 170M4540 with my thyristor?
Pre-arcing (melting) I2t is 125000 A2s and total clearing I2t is 755000 A2s at 1000 V. Compare the clearing figure against the I2t withstand of the semiconductor you are protecting; the device rating has to exceed the fuse's clearing I2t for the fuse to protect it.
4) What are the mounting dimensions and weight of the Bussmann 170M4540?
Square body with center bolted tags, measuring 170 mm, 72 mm and 52 mm on its three axes, weighing 622 g. The bolted-tag style means it lands on bus bar or stud terminals rather than clips, so check your existing tag centers and bolt hole pattern before swapping it into an installed holder.
5) How much heat does this 630A fuse put into the enclosure?
Watt loss is 98 W at rating. That is real heat inside the cabinet, so include it in your enclosure thermal calculation and in any derating for ambient temperature or restricted airflow around the bus work. At 630 A in a tight panel it is not a figure to ignore.
6) Is the 170M4540 acceptable for a CE marked machine build?
Yes. The fuse is IEC rated and CE marked, with an IEC voltage rating of 1250 V, which covers it for machinery and power conversion equipment built to European requirements.
7) Does the Bussmann 170M4540 have a blown fuse indicator or microswitch?
The indicator type on the 170M4540 is listed as Other, and the fuse does not come with insulated metal gripping lugs. If your panel relies on a striker pin or microswitch signal to trip a contactor or raise an alarm, confirm the indication style matches what your holder and control wiring expect before ordering.
8) What part number do I order and how does it ship?
Order by Bussmann manufacturer part number 170M4540. It is supplied in standard packaging as a single fuse, so quantity is per piece, not per pack, when you are stocking spares for a drive fleet.
How fast can I get the Bussmann 170M4540 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 170M4540 come with a warranty?
Absolutely. The Bussmann 170M4540 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 170M4540?
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 170M4540 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.
!