Bussmann 170M2671 Eaton High S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$712.95
Bussmann 170M2671 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 400A, 200 kAIC, Other, Fuse, Blade end X blade end, Class aR, DIN 43 620 - 170M2671

Bussmann 170M2671 Eaton High Speed Square Body Fuse, Class aR, 400A

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Model: 170M2671
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Bussmann 170M2671 Eaton High Speed Square Body Fuse, Class aR, 400A

The Bussmann 170M2671 is an Eaton series high speed square body fuse rated 700V (UL) / 690V (IEC) at 400A with a 200 kAIC interrupting rating, purpose-built for semiconductor protection in demanding industrial power circuits. This Class aR fuse (accompanied semiconductor protection) features blade end X blade end terminations on a square body with slotted offset bolted tags, built to DIN 43 620 dimensions for reliable fit in OEM and panel designs. UL Recognized and CE Marked, the 170M2671 delivers the documented clearing characteristics engineers need for coordinated, code-compliant overcurrent protection.

Key Features

  • Amperage & Voltage Rating: 400A at 700V (UL) / 690V (IEC) for high-power circuit protection.
  • High Interrupting Capacity: 200 kAIC rating provides robust fault-current interruption for demanding industrial systems.
  • Utilization Category: Class aR (accompanied semiconductor protection), designed to be paired with a coordinated overcurrent device.
  • Fuse Construction: Square body, slotted offset bolted tags with blade end X blade end terminations per DIN 43 620.
  • Clearing Characteristics: Pre-arc I²t of 18000 and clearing I²t of 125000 at 660V for precise semiconductor protection coordination.
  • Watt Losses: 70W.
  • Compact Dimensions: 67 mm height x 100 mm length x 30 mm width, approximately 236.3 g weight.
  • Application: Engineered specifically for semiconductor protection duty.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Amperage Rating: 400 A
  • Application: semiconductor protection
  • Certifications: UL Recognized
  • Clearing I2t: 125000 at 660 V
  • Compliances: CE Marked
  • Fuse Shape: Square body, slotted offset bolted tags
  • Insulated Metal Gripping Lugs (IMGL): No
  • Packaging Type: Standard
  • Pre Arc I2t: 18000
  • Product Height: 67 mm
  • Product Length/Depth: 100 mm
  • Product Weight: 236.3333333 g
  • Product Width: 30 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 690 V
  • Voltage Type: AC
  • Watt Losses: 70 W

Typical Applications

  • Semiconductor Protection Circuits
  • Industrial Power Electronics and Drives
  • High-Speed Overcurrent Protection Systems
  • Panelboard and Switchgear Protection
  • Commercial and Industrial Electrical Installations

Why Bussmann?

Bussmann by Eaton is a recognized name in circuit protection, and the 170M2671 reflects that engineering standard with UL Recognized, CE Marked construction built to DIN 43 620 dimensions for reliable fit and performance. Its documented pre-arc and clearing I²t characteristics along with its 200 kAIC rating give engineers the coordination data needed for reliable, code-compliant high-speed semiconductor protection in professional power systems.

Manufacturer Resources

Product Specs

Amperage Rating:
400 A
Application:
semiconductor protection
Certifications:
UL Recognized
Class:
Class aR
Clearing I2t:
125000 at 660 V
Compliances:
CE Marked
Connection:
Blade end x blade end
Fuse Indicator:
Other
Fuse Shape:
Square body, slotted offset bolted tags
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
200 kAIC
Mounting Method:
DIN 43 620
Packaging Type:
Standard
Pre Arc I2t:
18000
Product Height:
67 mm
Product Length Depth:
100 mm
Product Weight:
236.3333333 g
Product Width:
30 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
690 V
Voltage Type:
AC
Watt Losses:
70 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M2671 – Frequently Asked Questions

1) Will the Bussmann 170M2671 fit a standard DIN 43 620 fuse base or holder?
Yes. The 170M2671 is built to DIN 43 620 mounting dimensions, with a square body and slotted offset bolted tags, blade end by blade end. Body size is 67 mm high, 100 mm long and 30 mm wide, and it weighs about 236 g. The slotted tags bolt to the busbar or base pads rather than clipping in, so you need bolted terminations on the mounting, not fuse clips.
2) Can a Class aR fuse like the Bussmann 170M2671 be used as the only overcurrent protection on a drive circuit?
No. Utilization category aR means accompanied semiconductor protection: it protects against short circuits only and has to be paired with a separate device handling overload protection, typically a breaker, contactor or drive electronic overload. If you want a fuse that covers both overload and short circuit on its own, you need a gR or gS type instead.
3) Is 400A at 690V enough for my 480V drive input, and what fault current can this fuse clear?
The 170M2671 is rated 400 A at 690 V AC, so a 480 V AC circuit is well inside its voltage rating. Interrupting rating is 200 kAIC, which covers the available fault current on most industrial services. Voltage type is AC only, so do not apply it on a DC bus based on this rating.
4) What I2t numbers do I use to check the 170M2671 protects my SCRs and diodes?
Pre-arc I2t is 18,000 and total clearing I2t is 125,000 at 660 V. Compare the clearing figure against the semiconductor's published I2t withstand at the same conditions; the device rating has to exceed 125,000 for the fuse to protect it. The pre-arc value is what you use for selectivity between this fuse and any upstream fuse.
5) Is the Bussmann 170M2671 UL Listed for use as branch circuit protection?
It is UL Recognized and CE Marked, not UL Listed. Recognized components are evaluated for use inside a listed piece of equipment, which is how high speed semiconductor fuses are normally applied. For branch circuit protection required by code, you still need a UL Listed branch circuit device ahead of it.
6) How much heat does a 400A high speed square body fuse put into an enclosure?
Watt loss is 70 W at rating for the 170M2671. Budget that per fuse when you size enclosure ventilation, so a three phase set adds roughly 210 W of heat inside the cabinet. Derating applies if airflow around the fuse body is restricted.
7) Does the Bussmann 170M2671 have a blown fuse indicator or a microswitch?
The indicator type on the 170M2671 is listed as Other, so do not assume the standard striker pin plus microswitch arrangement. If your panel relies on a microswitch contact to signal a blown fuse to the controller, confirm the indicator style before you commit to this exact part number.
8) Does this Bussmann square body fuse come with insulated gripping lugs for live changeout?
No. The 170M2671 is supplied without insulated metal gripping lugs, so handling it is a de-energized job with standard tools. If your maintenance procedure calls for IMGL style handling, specify a version that carries that option.
9) How is the 170M2671 packaged, and can I standardize a spares stock on it?
Packaging is standard, single fuse, ordered by the 170M2671 part number. Because it is a fixed 400 A, 690 V aR device with no finish or option axes to pick, every unit you stock is identical, which makes it straightforward to hold as a shelf spare across several drive panels using the same rating.
How fast can I get the Bussmann 170M2671 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 170M2671 come with a warranty?
Absolutely. The Bussmann 170M2671 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 170M2671?
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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