Bussmann 170M4119 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,390.16
Image coming soon

Bussmann 170M4119 Eaton Series High-Speed Square Body Fuse, Class aR, 900A

(No reviews yet) Write a Review

Model: 170M4119

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

$1,390.16
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 170M4119 Eaton Series High-Speed Square Body Fuse, Class aR, 900A

The Bussmann 170M4119 is an Eaton Bussmann series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 1250V (IEC) / 1300V (UL) with a 900A amperage rating and a 200 kAIC interrupting rating, this Class aR (accompanied semiconductor protection) fuse features square body construction with blade end X blade end terminations built to the DIN 43 620 standard. It is designed to deliver fast, reliable clearing of fault currents to protect sensitive semiconductor devices in industrial power circuits.

Key Features

  • Amperage Rating: 900A (900 A) for high-current industrial power circuits.
  • Voltage Rating: 1250V (IEC), 1300V (UL), also listed at 690V AC, for use across demanding voltage classes.
  • Interrupting Rating: 200 kAIC delivers dependable high fault-current interruption.
  • Utilization Category: Class aR (accompanied semiconductor protection) for coordinated protection of semiconductor components.
  • Fuse Shape: Square body with slotted center bolted tags and blade end X blade end termination for a secure connection.
  • Standard: Built to the DIN 43 620 dimensional standard for compatible mounting.
  • Clearing Characteristics: Pre-Arc I2t of 155000 and Clearing I2t of 850000 at 660 V, with a Clearing Loss of 100, for predictable current-limiting performance.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Amperage Rating: 900 A
  • Application: semiconductor protection
  • Certifications: UL Recognized
  • Clearing I2t: 850000 at 660 V
  • Clearing Loss: 100
  • Compliances: CE Marked
  • Fuse Shape: Square body, slotted center bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Pre Arc I2t: 155000
  • Product Height: 62 mm
  • Product Length Depth: 245 mm
  • Product Weight: 491.3333333 g
  • Product Width: 142 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 690 V
  • Voltage Type: AC

Typical Applications

  • Semiconductor Device Protection
  • High-Speed Fault Current Interruption
  • Industrial Power Electronics Circuits
  • Panelboard and Switchgear Fuse Replacement
  • Renovation and New Construction Electrical Systems

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M4119 reflects that standard with UL Recognized, CE Marked construction built to the DIN 43 620 dimensional standard. Its Class aR utilization category and 200 kAIC interrupting rating make it a dependable choice for coordinated semiconductor protection in professional electrical and industrial power systems.

Manufacturer Resources

Product Specs

Amperage Rating:
900 A
Application:
semiconductor protection
Certifications:
UL Recognized
Class:
Class aR
Clearing I2t:
850000 at 660 V
Clearing Loss:
100
Compliances:
CE Marked
Connection:
Blade end x blade end
Fuse Indicator:
Other
Fuse Shape:
Square body, slotted center bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
200 kAIC
Mounting Method:
DIN 43 620
Packaging Type:
Standard
Pre Arc I2t:
155000
Product Height:
62 mm
Product Length Depth:
245 mm
Product Weight:
491.3333333 g
Product Width:
142 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
690 V
Voltage Type:
AC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M4119 – Frequently Asked Questions

1) Will a Bussmann 170M4119 high-speed fuse protect branch circuit wiring, or is it only for semiconductor protection?
The 170M4119 is a Class aR fuse, meaning accompanied semiconductor protection. It clears short circuits ahead of diodes, SCRs and IGBTs but does not provide overload protection on its own, so it has to work alongside a device that handles overload, typically a breaker or overload relay. For general branch circuit and wiring protection you want a branch-rated fuse instead, not an aR semiconductor fuse.
2) Will the 170M4119 fit my existing square body fuse holder or busbar mounting?
Mounting follows the DIN 43 620 dimensional standard, with a square body and slotted center bolted tags, blade end to blade end on both terminations. The body measures 62 x 245 x 142 mm. If your holder or bus mounting is built to DIN 43 620 with the same size designation and bolt centers, it drops in; if you have a flush-end or offset-tag style body, it will not land on the same bolts.
3) What voltage and fault current can the Bussmann 170M4119 handle?
Rated 690 V AC with a 200 kAIC interrupting rating. That interrupting capacity covers drive and rectifier sections fed from high-capacity services where available fault current is well above what a standard fuse can clear. Do not apply it above its voltage rating; semiconductor fuses are voltage-sensitive and an over-voltage application can fail to clear.
4) What I2t values do I need to coordinate this 900A fuse with my SCR or diode?
Pre-arc I2t is 155,000 and total clearing I2t is 850,000 at 660 V, with a clearing loss figure of 100. Compare the clearing I2t against the I2t withstand of the semiconductor you are protecting: the device rating has to exceed 850,000 at your applied voltage, or the fuse will not save it. Amperage rating is 900 A.
5) Can I replace a blown semiconductor fuse in my drive with a 900A 170M4119 if the amp rating matches?
Matching amps alone is not enough on high-speed fuses. The replacement has to match the utilization category (aR here), the DIN 43 620 body size and blade-end-to-blade-end mounting, the voltage rating of 690 V AC, and the I2t values your semiconductor was coordinated to (155,000 pre-arc, 850,000 clearing at 660 V). If the original was a gR or gS full-range fuse, a 900 A aR is not a straight swap because it does not carry overload protection.
6) Does the Bussmann 170M4119 have a blown fuse indicator or a microswitch option?
The indicator type on the 170M4119 is listed as other, and it is supplied without insulated metal gripping lugs. If your panel design depends on a striker pin driving a microswitch for remote blown-fuse annunciation, confirm the indicator style matches the switch you plan to mount before you order.
7) Is the Bussmann 170M4119 UL Listed or UL Recognized, and is it CE marked?
It is UL Recognized and CE Marked. Recognized components are evaluated for use inside a larger listed assembly such as a drive or switchgear enclosure, which is how square body semiconductor fuses are normally applied. If your specification calls for a UL Listed branch circuit fuse, this is not that product.
8) How heavy is the 170M4119 and does it ship individually?
Each 170M4119 weighs about 491 g and comes in standard packaging, ordered as the single model 170M4119. It is a substantial 245 mm body, so plan on bolted bus support rather than clip mounting.
How fast can I get the Bussmann 170M4119 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 170M4119 come with a warranty?
Absolutely. The Bussmann 170M4119 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 170M4119?
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 170M4119 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.
!