Bussmann 170M2620 Eaton Series...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$651.64
Bussmann 170M2620 Eaton series high speed square body fuse, 700V (UL), 690V (IEC), 350A, 200 kAIC, Top fuse status indicator, Fuse, Blade end X blade end, Class aR, DIN 43 620 - 170M2620

Bussmann 170M2620 Eaton Series High-Speed Square Body Fuse, Class aR, 700V/350A

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Model: 170M2620
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Bussmann 170M2620 Eaton Series High-Speed Square Body Fuse, Class aR, 700V/350A

The Bussmann 170M2620 is an Eaton Bussmann series high-speed square body fuse engineered for semiconductor protection in demanding power electronics applications. Rated 700V (UL) and 690V (IEC) with a 350A current rating and 200 kAIC interrupting capacity, this Class aR fuse features blade end X blade end terminals conforming to DIN 43 620 and a top fuse status indicator for at-a-glance condition checks. It is UL Recognized and CE Marked for use in industrial-grade protective circuits.

Key Features

  • Voltage Rating: 700V (UL) / 690V (IEC) for high-voltage industrial circuits.
  • Amperage Rating: 350A current rating suited for high-capacity semiconductor protection.
  • Interrupting Rating: 200 kAIC for reliable performance under high fault-current conditions.
  • Utilization Category: Class aR (accompanied semiconductor protection) per IEC classification.
  • Fuse Shape: Square body with slotted offset bolted tags and blade end X blade end terminals per DIN 43 620.
  • Status Indicator: Top fuse status indicator provides quick visual confirmation of fuse condition.
  • Clearing Characteristics: Clearing I2t of 91,500 at 660V and pre-arc I2t of 13,500 for precise semiconductor coordination.
  • Watt Losses: 60W rated power dissipation.

Certifications & Compliance

  • UL Recognized
  • CE Marked

Technical Specifications

  • Amperage Rating: 350 A
  • Application: semiconductor protection
  • Certifications: UL Recognized
  • Clearing I2t: 91500 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: 13500
  • Product Height: 66 mm
  • Product Length Depth: 233 mm
  • Product Weight: 232.6666667 g
  • Product Width: 140 mm
  • Utilization Category: aR (accompanied semiconductor protection)
  • Voltage Rating: 690 V
  • Voltage Type: AC
  • Watt Losses: 60 W

Typical Applications

  • Semiconductor Protection in Power Electronics
  • Variable Frequency Drives and Motor Control Systems
  • Rectifier and Converter Circuit Protection
  • High-Fault-Current Industrial Installations

Why Bussmann?

Bussmann by Eaton engineers this high-speed square body fuse for demanding semiconductor protection duty, backed by UL Recognition and CE Marking for confidence in critical industrial circuits. With a 200 kAIC interrupting rating, precise clearing and pre-arc I2t characteristics, and a DIN 43 620 blade end X blade end form factor, the 170M2620 delivers dependable, code-compliant protection for high-power electronic systems.

Manufacturer Resources

Product Specs

Amperage Rating:
350 A
Application:
semiconductor protection
Certifications:
UL Recognized
Class:
Class aR
Clearing I2t:
91500 at 660 V
Compliances:
CE Marked
Connection:
Blade end x blade end
Fuse Indicator:
Top fuse status indicator
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:
13500
Product Height:
66 mm
Product Length Depth:
233 mm
Product Weight:
232.6666667 g
Product Width:
140 mm
Utilization Category:
aR (accompanied semiconductor protection)
Voltage Rating:
690 V
Voltage Type:
AC
Watt Losses:
60 W
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
Fuse
Product Details:
Fuse

Bussmann 170M2620 – Frequently Asked Questions

1) Will a Bussmann 170M2620 fuse protect the semiconductors in my drive, or do I need a different class?
The 170M2620 is a Class aR high-speed fuse, meaning accompanied semiconductor protection. It clears short circuits fast enough to save diodes, thyristors and IGBTs, but it is not a full-range device: overload protection has to come from something else in the circuit, typically the drive's electronic overload or an upstream breaker. If you need a fuse that handles both overload and short circuit on its own, an aR fuse is the wrong choice.
2) What voltage and amperage is the Bussmann 170M2620 rated for?
350 A continuous, at 700V under UL and 690V AC under IEC. Interrupting rating is 200 kAIC, so it can sit on a bus with very high available fault current. If your system voltage exceeds 700V, this is not the fuse; if your load draws more than 350 A, size up rather than paralleling.
3) How does the 170M2620 square body fuse mount, and will it drop into my existing fuse base?
It is a square body fuse with slotted offset bolted tags, blade end by blade end, conforming to DIN 43 620. If your holder or busbar is drilled for a DIN 43 620 blade-end mounting of the same size, this bolts straight in. It is not a clip-in cylindrical fuse and will not fit a Class J or Class T holder.
4) What I2t values do I need to coordinate the 170M2620 with my thyristor or diode?
Pre-arc I2t is 13,500 and clearing I2t is 91,500 at 660 V. Compare the clearing figure against the I2t withstand of the semiconductor you are protecting at your actual circuit voltage. The device's rating has to exceed the fuse's let-through, otherwise the junction fails before the fuse does.
5) What are the physical dimensions and weight of the Bussmann 170M2620?
The fuse measures 233 mm x 140 mm x 66 mm and weighs about 233 g. Use those figures to confirm clearance in the enclosure and spacing between phases before you commit to the panel layout.
6) How much heat does this 350A high-speed fuse put into the panel?
Rated watt loss is 60 W at full load. Three of them in a three-phase set means budgeting roughly 180 W of dissipation inside the enclosure, which matters when you size ventilation or an air conditioner for a drive cabinet. Mounting orientation and derating for elevated ambient still apply.
7) Is the Bussmann 170M2620 UL Listed, and is it acceptable for European equipment builds?
It is UL Recognized and CE Marked. Recognized is a component listing, meaning it is approved for use inside a piece of listed equipment rather than as a standalone field-installed device. The CE Mark covers it for machinery and panel builds going to Europe.
8) Can I tell if the 170M2620 has blown without pulling it out of the circuit?
Yes. It carries a top-mounted fuse status indicator, so a technician can confirm condition visually from the front of the panel instead of de-energizing and testing each fuse. Handy on a three-phase rectifier bank where one open leg is the usual failure.
9) Does the 170M2620 come with insulated gripping lugs for safer handling?
No, this version is supplied without insulated metal gripping lugs (IMGL). If your maintenance procedure calls for pulling fuses with an insulated puller, you want the IMGL variant of the 170M series instead. Ships in standard packaging.
10) Where is a Bussmann 170M series high-speed fuse typically used?
Typical duty is semiconductor protection in power electronics: variable frequency drives and motor control, rectifier and converter circuits, and industrial installations with high available fault current. Anywhere the silicon is worth more than the fuse and a standard time-delay fuse would clear too slowly to matter.
How fast can I get the Bussmann 170M2620 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 170M2620 come with a warranty?
Absolutely. The Bussmann 170M2620 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 170M2620?
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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